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Gliders => Scale => Topic started by: Fred on January 05, 2009, 08:26:43 AM

Title: 1/4 Scale Ka-1
Post by: Fred on January 05, 2009, 08:26:43 AM
Well, after a very long break in building vintage gliders (wayyy too long !), a box arrived home, full of wood !
Enough to put a smaile on my face on one of the most depressing day of the year !

This time, I'm going backward and build a Kaiser Ka-1. The Ka3 come from this model, the Ka-1 being all wooden construction (Ka3 is tube and fabric)... Everything else are common to the 2 machines (wings and tail) which help a lot in the designing process !  :D

Starting with the fuselage, this one is built in 2 halves... Not sure if that's a good choice compared to a build using a jig, but will see !

The basic frame is made of 2mm plywood

(http://www.retroplane.net/forum/images/uploads/loopingfred/frame_166.jpg)

Formers are then glued to the frame

(http://www.retroplane.net/forum/images/uploads/loopingfred/couplemontage1_135.jpg)

(http://www.retroplane.net/forum/images/uploads/loopingfred/couplemontage2_149.jpg)

(http://www.retroplane.net/forum/images/uploads/loopingfred/couplemontage3_308.jpg)

We add the 5x5 sq. hardwood strips. Note that everything is built inside the fuselage. the servo tray, cockpit floor etc etc are glued in each halves of the fuselage.

(http://www.retroplane.net/forum/images/uploads/loopingfred/fuselagemontage_878.jpg)

The fuselage is then removed from the table. I've put water on the wood strips, and put back the fuselage on a flat surface with loads of weight to have it really straight before going further.

A last view of the fuselage
(http://www.retroplane.net/forum/images/uploads/loopingfred/internalview_121.jpg)

Start to look like something !
Title: 1/4 Scale Ka-1
Post by: Happy Days on January 05, 2009, 12:27:57 PM
What type of glue do you use with the plywood Fred?...and why? :?:

K.
Title: 1/4 Scale Ka-1
Post by: Fred on January 05, 2009, 12:37:37 PM
Hi Keith,

I use my usual mix of white glue and Cyano.
Because you have the best of both world  :D  
Strenght with the white glue, fast with the CA.

And I have just received this morning my Bottle of Gorilla Glue (PU)  :D  I'll build the wing with that one. You can't use CA with it and need 2 hours to cure, but with the wings, you don't need to hold all the parts together, so that should be perfect ! Worth a try, I will let you know !  :D
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on January 05, 2009, 13:38:20 PM
Looks Great Fred  :D :D . When do you think you will have it ready? What kind of colour scheme have you planed?
Title: 1/4 Scale Ka-1
Post by: Fred on January 05, 2009, 13:43:00 PM
Thanks Alan,

Hopefully by the end of the month.. But going slowly on that one, The fuselage planking is going to be the major bit :D
Finishing will be all plywood + varnish.
No paint as I am absolutely useless with paint (a bit like if you leave a 4 year old re-painting your house...  :?:  Well, saying that, he may do a better job than mine ! )
Title: 1/4 Scale Ka-1
Post by: Fred on January 06, 2009, 08:12:14 AM
While the fuselage half is still drying (-2 degrees in the garage yesterday !...) I had a look at the wing and started building them, until my fingers freeze !  :roll:

A bit of the pieces... Lots of parts!

(http://www.gliderireland.net/forum/images/uploads/Fred/ailespieces.JPG)

Then, classical work, gluing the ribs on the lower spar, keeping everything as straight as possible...

(http://www.gliderireland.net/forum/images/uploads/Fred/ailemontage.JPG)

During progress on the build, incorporate the servo frames for the ailerons and airbrakes... Everything slots together, so no real big deal here...

(http://www.gliderireland.net/forum/images/uploads/Fred/servotray.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/affermeture.JPG)

Then, it's time to close the ailerons...

(http://www.gliderireland.net/forum/images/uploads/Fred/aileronsfermeture.JPG)

And that's it ! Too cold in the workshop, I'll continue tonight.
Left to do are the Upper spar, webbing, TE, LE and tips.. Enough to keep me out of drugs !  :P
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on January 06, 2009, 14:07:03 PM
Goes together quick. Will you be making it avalable as a short kit?
Title: 1/4 Scale Ka-1
Post by: Fred on January 06, 2009, 14:29:45 PM
Thanks to the cnc cutting !
As usual, a non event to assemble the thing !

We'll see after the build, if successfull, that will be added to our range  :D
Title: 1/4 Scale Ka-1
Post by: Fred on January 06, 2009, 23:38:46 PM
Alright, let's get some progress !

I have continued with the wing, and glued the upper spar in place, so as the fake LE and the TE...
A bit of bad names with the TE, as you need something like 3 hands to put it in place!   :P  But with a bit of patience, finally done it after 10 minutes...

(http://www.gliderireland.net/forum/images/uploads/Fred/vueaile.JPG)

The wing root is also made. The angle of the first rib is 2 degrees for the diedhral. And a triangular piece gives the right angle to the front rib.

(http://www.gliderireland.net/forum/images/uploads/Fred/rootaile.JPG)

And the fake LE

(http://www.gliderireland.net/forum/images/uploads/Fred/fauxba.JPG)

Then, I focused on the wing tip.

Really easy, all the pieces are interlocking with each other !
First the ribs

(http://www.gliderireland.net/forum/images/uploads/Fred/Saumon1.JPG)

Then the tip frame in 2mm plywood

(http://www.gliderireland.net/forum/images/uploads/Fred/saumon2.JPG)

And finally, all glued with epoxy to the wing. I also added 2 small pieces of reinforcement, but that is not really necessary, just for peace of mind...

(http://www.gliderireland.net/forum/images/uploads/Fred/collagesaumon.JPG)

And that's it !
Left is the aileron to complete, the webbing and sheeting, and the piece de resistance, the Airbrakes mounting brakets and so on !

(http://www.gliderireland.net/forum/images/uploads/Fred/vueaile2.JPG)
Title: 1/4 Scale Ka-1
Post by: Fred on January 06, 2009, 23:48:34 PM
Back to the fuselage for a little while.
I have glued the front skid support so as the cabin floor, all in 3mm plywood.

(http://www.gliderireland.net/forum/images/uploads/Fred/interiorfuselage.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/interiorfuselage2.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/extfuselage.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/extfuselage2.JPG)

After that, to have a break, I built the pilot seat. I have shamely (?) stolen the design from Vincent's MG9a !  :oops:  Thanks Vincent !  :D

The parts (3mm plywood)

(http://www.gliderireland.net/forum/images/uploads/Fred/kitsiege.JPG)

And 2 minutes later :

(http://www.gliderireland.net/forum/images/uploads/Fred/siegemonte.JPG)

The seat will be covered with 0.4mm plywood as soon as I start the fuselage sheeting...

And in the cockpit, just to have a look  :D

(http://www.gliderireland.net/forum/images/uploads/Fred/siegefuselage.JPG)

And that's it for tonight !

Tomorrow, my plan is to start the second half of the fuselage, and start the airbrake assembly in the wing.

Stay tuned !  :D
Title: 1/4 Scale Ka-1
Post by: Fred on January 07, 2009, 21:47:57 PM
Not much done this evening... Wayyyy too cold in the garage ! (still -2...)

Anyway, managed to start the other half of the fuselage...
And here is a trick that can be usefull...
How to get the other side of the fuselage on the paper plan ?
An old trick is to use kitchen oil, that you spray (just a small amount !!) over the "side B" of the plan.

(http://www.gliderireland.net/forum/images/uploads/Fred/huileplan.JPG)

And the result (look much more sharp in real...)

(http://www.gliderireland.net/forum/images/uploads/Fred/transparent.JPG)

Of course, work for wings, tail etc etc...  :D

And the fuselage...

(http://www.gliderireland.net/forum/images/uploads/Fred/autrefuselage.JPG)

Tomorrow, I should start the airbrakes... If I don't get the flu before ! :P
Title: 1/4 Scale Ka-1
Post by: Happy Days on January 07, 2009, 22:12:48 PM
I'd buy you a garage heater for next christmas Fred, but you haven't got any room for one!  :roll:
Title: 1/4 Scale Ka-1
Post by: Fred on January 08, 2009, 08:54:35 AM
Actually.. I was looking for a Gas heater earlier this year...
But I need to properly seal the garage door, that's mostly where the cold come from !
Garage should be empty for spring cleaning in 2 weeks time, and I have 120m2 of Depron hanging around...
Title: 1/4 Scale Ka-1
Post by: Fred on January 09, 2009, 09:17:46 AM
Yesterday evening, I finally assembled the 2 fuselage haves.
Took some time, as you have to move slowly to make sure that everything is straight !

Start to look like a glider now !  :D

(http://www.gliderireland.net/forum/images/uploads/Fred/assemblage1.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/assemblage2.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/vueinterne.JPG)

A few pieces are added to finish to link the 2 halves...

(http://www.gliderireland.net/forum/images/uploads/Fred/pieceaile.JPG)

And you can add a few more if you want, like under the cockpit floor and so on to add some strenght.

Here is a view of the front skid... This will be later closed with a strip of 3mm plywood before starting the fuselage sheeting...

(http://www.gliderireland.net/forum/images/uploads/Fred/vuepatin.JPG)

And that's it for today !

Rain forecasted this week end... Sound like some "good" days ahead to spend time in the workshop !
Title: 1/4 Scale Ka-1
Post by: Fred on January 21, 2009, 15:13:38 PM
Ok, after a week off the workshop, preparing the new family addition that is coming really soon  :D

During the week, I managed to work a little anyway, and here is what I've done.

The V tail support as been glued in place on the tail. Just missing are the carbon tubes for the joiner.

Here are the parts :

(http://www.gliderireland.net/forum/images/uploads/Fred/piecesupportstab.JPG)

And all glued together :

(http://www.gliderireland.net/forum/images/uploads/Fred/supportstab.JPG)

Then, I started with the V Tail...

(http://www.gliderireland.net/forum/images/uploads/Fred/piecesvtail.JPG)

And after 15 minutes of hard work in the sitting room (not crazy for once ! Worked in a warm environment ! :P  )

(http://www.gliderireland.net/forum/images/uploads/Fred/voletfinis.JPG)

Left to be glued are the blocks where the hinges are going.
Title: 1/4 Scale Ka-1
Post by: Fred on January 21, 2009, 15:24:52 PM
I also did som bits and pieces on the wings.

I closed both ends of the ailerons.

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6013.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6014.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6015.JPG)

And started to have a look at the airbrakes system. Achim did a really good job here!


All the pieces are in 2mm plywood.

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6017.JPG)

But I have CNCed the supports on the wings for the hinging in epoxy

(http://www.gliderireland.net/forum/images/uploads/Fred/cncsupports1.jpg)

But I went a bit too fast for the cutting. Haven't payed attention, and cutted the epoxy at 20mm/s with a 0.8mm bit...! Should more be 10mm/s to have them perfect, my mistake !
I'll redo them when I have 5 minutes.

(http://www.gliderireland.net/forum/images/uploads/Fred/cncsupports2.jpg)
Title: 1/4 Scale Ka-1
Post by: Fred on January 21, 2009, 15:28:50 PM
And I did the sheeting for the seat in 0.8mm plywood...

(http://www.gliderireland.net/forum/images/uploads/Fred/seatsheeting1.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/seatsheeting2.jpg)

And that's all for now !
Title: 1/4 Scale Ka-1
Post by: Happy Days on January 21, 2009, 16:25:41 PM
Covered ailerons?  :shock:

Oh, of course, this is a scale model. It all looks very intricate work Fred and coming alone nicely.

But you said something in the beginning of your last post :?: . Something about a family addition :?:  :?:


Could this be another model? No..... that wouldn't be a family addition.


Maybe your mother-in-law is coming to live with you??? (Lucky you!)


Or is there a secrete you've been hiding from us for nine months :D

K.
Title: 1/4 Scale Ka-1
Post by: Brian on January 21, 2009, 18:22:27 PM
hi Keith
Thats the first time I've heard of a new arrival being described as a 'secretion'  :mrgreen:

Brian
Title: 1/4 Scale Ka-1
Post by: Brian on January 22, 2009, 11:43:41 AM
Hi Guys,
I asked this elswhere but got no replies,anyway;
What is the difference between solartex vintage and solartex natural.
Which is more see through.

Brian
Title: 1/4 Scale Ka-1
Post by: Fred on January 22, 2009, 13:06:10 PM
Quote from: "Happy Days"
Covered ailerons?  :shock:

Oh, of course, this is a scale model. It all looks very intricate work Fred and coming alone nicely.

But you said something in the beginning of your last post :?: . Something about a family addition :?:  :?:


Could this be another model? No..... that wouldn't be a family addition.


Maybe your mother-in-law is coming to live with you??? (Lucky you!)


Or is there a secrete you've been hiding from us for nine months :D

K.


Unfortunately, it's not the mother in law...  :P  :P
And not a beer belly either (I've checked and marked all the bottles in the house!)

Daughter is going to have a little sister or brother within the next 2 to 3 weeks  :D  :D
Working on the nest right now (filling car and skip!   :!: )
Title: 1/4 Scale Ka-1
Post by: Fred on January 22, 2009, 13:11:53 PM
Quote from: "Brian"
Hi Guys,
I asked this elswhere but got no replies,anyway;
What is the difference between solartex vintage and solartex natural.
Which is more see through.

Brian


Hey Brian,

sorry, may have missed the post...

Difference is the color of the fabric.

Solartex "normal" is white :


(http://www.gliderireland.net/images/Planeur/ka3/entoilage2.jpg)

Solartex antique is.. well, looks old !  :P   :

(http://www.gliderireland.net/images/Planeur/opel/DSCF2050.JPG)

I think the antique is a little more see through  :?:
But all depend of the finish you are looking at at the end...Painted or natural.

Your other option is Diacov, like the 1/3 scale Ka3...
Title: 1/4 Scale Ka-1
Post by: Happy Days on January 22, 2009, 14:46:00 PM
Well congratulations Fred. :clap: :clap:   (I remember saying to Joe, back in the autum, that I thought you were putting on a bit of weight)
Do post a picie of the little cherub when it arrives. (No doubt it will be born with a control stick in one hand and bottle of CA in the other :lol:)


K.
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on January 22, 2009, 15:19:10 PM
:lol:  :lol:  :lol:
Congratulations Fred  :D  :D .
Title: 1/4 Scale Ka-1
Post by: Fred on January 22, 2009, 19:19:18 PM
Thanks guys  :oops:

And here's Aoife (21 months), playing with daddy's Ka1 ! She loves planes and go flying rubberband planes at the Park with me  :D

(http://www.gliderireland.net/forum/images/uploads/Fred/aoifeka1.jpg)
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on January 22, 2009, 19:34:59 PM
Ah. Thats why your models looks so good. Aoife has been building them  :P  :P  :P  :wink:  :wink:
Title: 1/4 Scale Ka-1
Post by: Happy Days on January 22, 2009, 21:08:15 PM
Aoife obvoiusly takes after Mrs Fred,........(The better looking side of the family :wink: )
Title: 1/4 Scale Ka-1
Post by: Fred on January 25, 2009, 18:32:04 PM
Well, that's it ! The main building is done (structure).
Now all the sheeting + Servos installation need to be done.

Here is a picture of the Ka1 with 99% of what is going to be the short kit parts fitted (just add your joiner and balsa strips to get to this stage). Missing from the photos are the airbrakes and a few bits and pieces (ailerons top/bottom, cockpit enclosure...)

(http://www.gliderireland.net/forum/images/uploads/Fred/structure1.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/structure2.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/structure3.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/structure4.JPG)

I'll start the fuselage sheeting next week. Long job ahead !
Title: 1/4 Scale Ka-1
Post by: Happy Days on February 06, 2009, 09:58:11 AM
So how's the sheeting coming along Fred?

Or could it be that Aoife has a little brother or sister for you to play with instead? :D
K.
Title: 1/4 Scale Ka-1
Post by: Fred on February 06, 2009, 10:03:35 AM
Hey Keith,

Fuselage sheeting is coming out nicely.. But slowly !  :oops:
2 weeks now I haven't done much, too busy with the family ! No baby yet, but should be any time now...

I hope to have it done this week end as the most tricky part (the front fuselage) is almost done.  :D

After that, well, glider is ready to be covered (wings) and for the fisrt flight  :D  I'll post some photos of the process soon...
I made the plan to use 2mm balsa sheeting, much easier if you do a paint finish, but for a bare wood finish, no other choice than spending time doing the sheeting panels by panels...  :!:  :wink:
Title: 1/4 Scale Ka-1
Post by: Fred on February 09, 2009, 11:28:17 AM
I'm not dead ! (yet!  :P )
Working really slowly on this one, not at my usual pace !  :roll:

Here is a quick update on the project...

VTails are ready for sheeting (in 0.4mm plywood), since the last time, I've glued the LE (10mm balsa) and the tubes for the joiners.

(http://www.gliderireland.net/forum/images/uploads/Fred/stabba.jpg)

Now the stab is holding alone on the fuselage.. Small step, but getting there !

Now back to the fuselage sheeting...
Here is how I do it.

I put a light inside the fuselage (I use a flat one, with 3 LEDs, they are used to put light on a cabinet or something like that...)

(http://www.gliderireland.net/forum/images/uploads/Fred/lumiere.jpg)

Then, I use light cardboard and put it where I want to do the next panel...

(http://www.gliderireland.net/forum/images/uploads/Fred/carton.jpg)

You can't see it on the photo, but you can actually see where the panels already glued stops... Then, with a paper pen, you draw the contours and cut.
Apply on the fuselage to check that is ok...

(http://www.gliderireland.net/forum/images/uploads/Fred/cartondecoupe.jpg)

Then, put all that on the piece of plywood and draw the contours with a paper pen (don't use anything else ! Or that will show when you apply the varnish!)
I cut the plywood (0.8mm here) with scissors...

(http://www.gliderireland.net/forum/images/uploads/Fred/gabaritdecoupe.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/decoupecoffrage.jpg)

And glue (white glue, and as usual, 1 or 2 drops of CA to hold it in place while drying...)

(http://www.gliderireland.net/forum/images/uploads/Fred/coffragepose.jpg)

That's one more...387646809 more to go !  :!:  :lol:

(http://www.gliderireland.net/forum/images/uploads/Fred/coffrageavant.jpg)

I do 2 to 4 panels a night, not more... Note that the plan is for a 2mm balsa sheeting, that way, that will not take more than 2 evenings to complete, but you need a painted finish (like 99% of the Ka1...), doing the sheting in plywood for a varnish finish, is a bit of a challenge...
Title: 1/4 Scale Ka-1
Post by: Fred on February 09, 2009, 11:31:15 AM
The servos and the Sullivan snakes are now in place...
(http://www.gliderireland.net/forum/images/uploads/Fred/poseservos.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/servossnakes.jpg)

For the snakes, I have updated the plan to use built in supports on the formers  :D

Now that the servos are here, I can continue with the sheeting of the fuselage.
Title: 1/4 Scale Ka-1
Post by: joe on February 09, 2009, 12:21:00 PM
Bless your patience Fred. It will look great in the end and be worth all the extra time and effort!
Title: 1/4 Scale Ka-1
Post by: Fred on February 09, 2009, 12:31:59 PM
:D  That's what keeps me going !  :P
Just keep thinking of the varnish finish...=P~

Fuselage is the big pain, no mistakes can be made as they will show up big time  :!:  
Now I move to the tail of the fuselage, hopefully, that will be completed this week  :D  First flight for the end of the month if so  :D  (Well, and weather permitting, haven't flown for ages !  :!:  :!:
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on February 09, 2009, 13:27:44 PM
That idea with the light is great, your a genius Fred  :D  :D . Looks like it's coming on well. Just a quick question, if you ever needed to take the servos out how will you do it. Is the servo tray removable.
Title: 1/4 Scale Ka-1
Post by: Fred on February 09, 2009, 13:45:25 PM
Thanks Alan  :D
For the servos, you will be able to access them by a hatch at the top (access to lock the wings...)

Fingers crossed anyway, I never had to change a servo on one of my machine. Here, they are standards servos.
Title: 1/4 Scale Ka-1
Post by: Fred on February 18, 2009, 09:10:21 AM
Alright, I stay quiet, but still moving on the fuselage sheeting !
Almost done, 12 panels left to do !  :D

So, since the last update, I have glued the struts supports on the fuselage, before sheeting this area

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6257.JPG)

Also done the junction between the fuselage and the wing supports.

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6256.JPG)

While I was at it, I have made a fuselage support... Handy to keep the fuselage straight, and also for transportation, and setup at the slope  :D

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6266.JPG)

The support is made of 3mm plywood, with camping mat (the green thing...) to protect the fuselage, and the tubes are aluminium, for a kind of a retro/modern look  :D
I have integrated the support on the plan, takes 2 minutes to build, but worth it, as this is really helpfull...

And the sheeting is coming in nicely...

For the cockpit area, now, you have the choice.. There is at least 3 version of canopies on the Ka1 to choose from !
One is from the early days, with a wood frame at the base of the canopy, second one is the same as the early days of the Ka1, but without the wood planking at the base of the canopy, and finally, a Ka3 type canopy...

Here is the basic frame for the last 2 canopies type... The tubes for the canopy goes on the fuselage directly :

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6262.JPG)

And here is the version with the wooden planking at the base, reproducing the early type of the Ka1 :

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6263.JPG)

I think I will go with the last one ! The Ka3 type will be much more easier to make, but the early type will be.. let's say, much more interresting to make !  :P  Lots of soldering for the tubes there !
But I can always make 2 differente type of canopies, the Ka3 one would be the easiest one to do... We'll see !

And here is where I was yesterday evening  :D

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6259.JPG)

Almost finished ! End of month for completion is still on sight !  :D
Title: 1/4 Scale Ka-1
Post by: Fred on February 20, 2009, 08:44:54 AM
Fuselage sheeting is 99% done ! :D
Well worth the effort, and I now can't wait to sand it and put my first layer of varnish !


(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6270.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6275.JPG)

Really pleased with that one !

And a really small part of the mess...

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6281.JPG)

For the fuselage, so far, I have used 2 sheets of 0.8mm size 1200mm x 300 !! Looking at the plan, I was sure one would have been enough... But once sheeted, the fuselage looks bigger than the Ka3 one, same size...

This week end, wing sheeting and servos !
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on February 20, 2009, 13:16:42 PM
=P~  =P~  =P~  =P~  =P~
Title: 1/4 Scale Ka-1
Post by: joe on February 20, 2009, 16:51:34 PM
congratulation! well done. bet your glad to have that finished. Looking great! :clap:  :clap:
Title: 1/4 Scale Ka-1
Post by: Fred on February 20, 2009, 18:39:12 PM
:D  Thanks guys !  :D
Yeah, glad to be at this stage now ! Everything else should be like a walk in the park !
Another big step this week end with the wing sheeting...  :D
Title: 1/4 Scale Ka-1
Post by: Fred on February 22, 2009, 11:59:20 AM
A good day yesterday !
Managed to have some free time in the garage !  :D

Elevator are now sheeted with 0.4mm plywood...
I'm in love with the impact glue (contact)... Make the job really easy, and the waiting time is really close to nothing ! (around 2 minutes, and it's not warm in the garage !)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6293.JPG)

And on the glider...

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6298.JPG)

I've also glued the wing struts supports...

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6289.JPG)

And made half of the balsa sheeting on the wings ! TE are cutted and ready to be glued once I finish the sheeting...
The balsa will then receive 0.4mm plywood, and job done !  :D

Really looking good so far !   :D

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6296.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6300.JPG)

In the cockpit, you can see the final color that will be applied on all the plywood surface... After lots of thinking, I will go with the same color as the Opel, with Diacov... (Opel is in Solartex Antique...)
And several layers of varnish on top of that...
Title: 1/4 Scale Ka-1
Post by: joe on February 22, 2009, 16:38:58 PM
looking really good Fred. You are getting there!! Keep up the good work  :clap:  :clap:
Title: 1/4 Scale Ka-1
Post by: Fred on February 22, 2009, 19:07:05 PM
Thanks Joe, getting there ! Slowly, but surely !  :D
Title: 1/4 Scale Ka-1
Post by: Fred on March 09, 2009, 11:54:47 AM
Great day yesterday !
I managed to have a bit of time on the Ka1 !
I have started the finishing process and put the teinted varnish on the fuselage !

Before :

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6541.JPG)

The varnish used :

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6544.JPG)

And the result with only 1 coat...

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6545.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6546.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6547.JPG)

And I think I will stay with one coat ! I love the color as it is ! With several coats of clear varnish on top, the effect should be really good !

Well, happy Fred !  :D
Title: 1/4 Scale Ka-1
Post by: joe on March 09, 2009, 19:50:36 PM
Looking good Fred! Worth all that work in the end.
Title: 1/4 Scale Ka-1
Post by: Fred on March 17, 2009, 22:51:57 PM
Still moving !
Today, I finished the V Tail  :D

Covering is made with Diacov, and on the fixed part, with the technique explained here : http://www.gliderireland.net/covering.htm

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6694.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6697.JPG)

And you can't really see it on the photos, but so far, 3 coats of clear varnish has been applied to the fuselage... Shinny !  :D

Wing sheeting in 0.4mm plywood is also started, photos later.
Title: 1/4 Scale Ka-1
Post by: Fred on March 23, 2009, 10:02:45 AM
A bit of work over the week end  :D
Back to the wings, and first, with the airbrakes.

Nothing to say really here, just have to study the plan and do some test fit first. No major issues.

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6686.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6688.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6709.jpg)

Then, time to start the plywood sheeting of the wing. It's all made with 0.4mm plywood and glued with "impact" glue.
Easy job to do.

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6705.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6707.jpg)

The plywood is in one piece, rolled over the LE. Smooth and clean finish !

After 1h30, everything is sanded smooth... You can see the ribs under the balsa and plywood. I think this is going to look really good once the colored varnish will be applied  :D

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6715.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6716.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6719.jpg)

Et voila ! Tonight, the aileron articulation, and start to work on the second wing !
This glider should be finished by the end of the week now...  :D
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on March 23, 2009, 12:39:21 PM
So test flight this weekend then Fred  :D  :D  :D . Look great  =P~  =P~  =P~  =P~  =P~
Title: 1/4 Scale Ka-1
Post by: Fred on March 23, 2009, 13:10:04 PM
Thanks Alan,

Maybe not this week end, but after, yes, all good !

Any progress on the Ka8 by the way ?  :D
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on March 23, 2009, 13:14:14 PM
Yes I'm making progress with the K8. I hope to have all the major parts attached to the fueslage this week end and I'll take some photos of it. There is still a lot of work to do such as sheeting the tailplane and the fin. But i'm getting their.
Title: 1/4 Scale Ka-1
Post by: Fred on March 23, 2009, 13:16:39 PM
Good stuff Alan !  :clap:
Retroplane is approaching fast !  :D
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on March 23, 2009, 13:19:18 PM
I know. I can't wait  :D  :D  :D  :D
Title: 1/4 Scale Ka-1
Post by: Fred on April 06, 2009, 08:27:07 AM
Alright, big push this week end on the Ka1 !

First, the ailerons... Really easy.

Separate the ailerons from their supports with a saw or knife...

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6792.JPG)

Glue 10mm balsa on the aileron's LE, sand in shape.
Cut slots for the hinges (Robart type ones here...)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6787.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6786.JPG)

And put in place !
Hidden articulation... Top view :
(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6788.JPG)

And bottom view before closing the aileron to see the articulation...
(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6790.JPG)
Title: 1/4 Scale Ka-1
Post by: Fred on April 06, 2009, 08:31:43 AM
And the big day, when I finally started to paint the wings !  :D
Both wings are fine sanded for the last time, and the colored varnish is then applied.
The finishing will be the same as everything else, varnished.. Lots of coats...  :D

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6873.JPG)

And once dry, fit everything together in the garden to have a good look before covering...

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6874.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6875.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6877.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6880.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6881.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6883.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6887.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6888.JPG)

Looking good !
Next step are the covering, and plug the servos...  :D
Title: 1/4 Scale Ka-1
Post by: Happy Days on April 06, 2009, 08:57:05 AM
Well, I have to say that's very impressive Fred :D

Are you proud of the fruits of your labours?

You bloody well should be! :clap:

K.
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on April 06, 2009, 09:27:38 AM
Wow, that looks great  =P~  =P~  =P~  =P~
Title: 1/4 Scale Ka-1
Post by: Fred on April 09, 2009, 08:11:09 AM
Thanks guys !  :oops:

Getting close to completion !
Covering is started and should all be finished this week end, ready to fly (well, almost, have to make the canopy after that!)

Same technique used as for the Opel Rak.

Starting with the aileron :

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6895.jpg)

Masking tape applied on the wing :

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6896.jpg)

Then Diacov :

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6898.jpg)

And the excess is then cutted with a new blade following the masking tape to neat and straight :

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6899.jpg)

Et voila !
Before / After :
(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6900.jpg)

And the wing :


(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6906.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6907.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF6901.jpg)

Now, several coats of varnish need to be applied.
Title: 1/4 Scale Ka-1
Post by: joe on April 09, 2009, 10:30:10 AM
looking very good!
The ply/varnish finish is a lot of work but it is really nice.
Nearly there!! :clap:  :clap:
Title: 1/4 Scale Ka-1
Post by: Fred on April 20, 2009, 08:45:54 AM
Finally did the canopy frame this week end  :D

All in brass, and I think that look really good with the varnish finish  :D

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7013.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7014.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7016.jpg)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7017.jpg)

Looking good!
Missing is the top frame... Did it, but I will take a photo tonight with the clear plastic hopfully...

And all the excess is then filed down to make it clean.

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7018.jpg)
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on April 20, 2009, 09:00:02 AM
Looks Great. Did you use a Jig when souldering it together?
Title: 1/4 Scale Ka-1
Post by: joe on April 20, 2009, 09:25:40 AM
Yeah the brass looks very good with the varnished wood. Nice!
Title: 1/4 Scale Ka-1
Post by: Fred on April 20, 2009, 10:07:34 AM
Thank you both  :D

Alan, no jig at all.. Tried with a jig, but spent more time to try to keep everything together than soldering !
So, paper tape and fingers to hold all that (well, burnt fingers now...)
Just a good prep workand that goes very quickly.

I just have to glue the clear plastic, then glue the brass frame to the wood...

Instead of gluing the plastic sheets, I'll try to have a go at nail them...
Title: 1/4 Scale Ka-1
Post by: Fred on April 21, 2009, 11:03:00 AM
Final frame...

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7051.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7052.JPG)
Title: 1/4 Scale Ka-1
Post by: Fred on June 12, 2009, 09:58:59 AM
Ok, somebody reminded me that I never showed the finished product !  :oops:
Checked all my threads, and yep, forgot!

Ka1 is finished for a while now, just waiting for the maiden flight which will certainly occur during Retroplane at this stage.. Just to add a slight stress to the process!  :P

So, here are the photos!

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7356.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7358.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7360.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7361.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7364.JPG)

The happy pilot come from Premier Pilots ( http://www.premierpilots.net/ ) and came with full options! Cap, but also parachutes, leather helmet and googles, leather coat etc etc! Very impressive, and the best 1/4 scale pilot I ever had!!
Fits the Ka1, but also the Ka3 and Grunau like a glove ! (I'll take more photos of that a bit later)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7365.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7368.JPG)

And with the Retroplane flag!  :D  :P

(http://www.gliderireland.net/forum/images/uploads/Fred/DSCF7373.JPG)
Title: 1/4 Scale Ka-1
Post by: Alan_Perse on June 12, 2009, 11:08:25 AM
Looks great Fred  :D  :D . That Premier Pilot certainly looks good. Where can I get one of those Retroplane flags from (or windsocks for that matter). My K8 is progressing. Will post some pictures soon. The way things are going it might not get its maiden flight untill retroplane as well.
Title: 1/4 Scale Ka-1
Post by: error404 on June 12, 2009, 13:34:38 PM
WOW!!!!!!!!!!!!!!!!!  :clap:

Amazing build Fred, it looks stunning.  8)
Title: 1/4 Scale Ka-1
Post by: Fred on June 12, 2009, 14:09:17 PM
Thanks you both  :D

Alan, for the flag, not on sale, they are Limited edition collectors  :D

But I'm sure Anthony can sort that out for you, or someone else for flags and Windsocks  :D
Title: 1/4 Scale Ka-1
Post by: Stephan on June 17, 2009, 20:04:31 PM
Great glider Fred realy I am impressed about your pace.  :clap:
Stephan
Title: 1/4 Scale Ka-1
Post by: Fred on June 18, 2009, 09:18:30 AM
Thanks a lot Stephan  :oops:
But I usually spend no more than a month on a build.. Must get old! Or have kids!  :P
Title: 1/4 Scale Ka-1
Post by: Fred on July 20, 2009, 14:13:09 PM
And the Ka1 fly !  :D  :D
Ok, the first flight finished by a loooonnnnngggg walk of shame due to a CG way too forward (must listen to that little voice one day!) but after removing around 60grs, flew much better !
Plan is to remove another 100gr to be perfect !
So, the Ka1 is now less than 3Kgs (2900grs after the last bunch of lead is removed...)
Happy !  :D
Back to the Grunau now!

(http://www.gliderireland.net/forum/images/uploads/Fred/IMG_5485.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/IMG_5796.JPG)

(http://www.gliderireland.net/forum/images/uploads/Fred/IMG_5797.JPG)
Title: 1/4 Scale Ka-1
Post by: Champo on May 25, 2012, 21:29:06 PM
Quote from: "Fred"
Hi Keith,

I use my usual mix of white glue and Cyano.
Because you have the best of both world  :D  
Strenght with the white glue, fast with the CA.



Fred could you tell me more about your tremendous mix :
which Cyano do you use (liquid, medium...) ?
ratio of the 2 glues ?
...

Thanks
Claude
Title: 1/4 Scale Ka-1
Post by: Fred on May 26, 2012, 20:30:19 PM
Salut Claude,

very very easy  :D

It's not really a mix, but I put the white glue, and on top, I put a few drops of Cyano (medium for me, but works with any Cyano, just be careful not to touch the CA nozzle with the white glue. That do some sort of spaghetti thingy, pretty annoying to remove!) evry 2 or 3cms.

Like that, when you apply the pieces together, they hold together instantly (Cyano), but the final drying occurs when the white glue is fully cured.
The best of both worlds!  :D

Hope this is clear enough, but really, nothing mysterious  :D
Title: 1/4 Scale Ka-1
Post by: Champo on June 06, 2012, 08:18:59 AM
Thanks Fred :
OK, that's what I did to cover the C-34 fuselage with plywood panels.