Prob building Phase 6 fuselarge.

[Happy Days]

Having a spot of bother building this Phase 6 of mine. :?
All sensible ideas would be greatly appreciated

The picture shows the front (inside) portion of the fuselarge. I am required to stick the piece of triangular section around the bottom section of the fuse'. To aid the bending of this piece of 3/8" section I've cut little slots in the top.

The instructions advise PVA glue which takes at lease half an hour to set.
To hold the triangular section in place around the curves of the bottom of the fuse' for that much time the instructions advise pinning the triangular strip to the fuse.............

There in lies the problem  :!:

The triangular strip of wood is so dam hard that the pins just bend or snap. I fear using thicker pins in case I split the wood.

So,..............all you experts out there,.........what's the solution :?:

K.

[Brian]

Hi Keith,
Cut and bend till good dry fit.
Run small bead of PVA onto the plywood having sanded it first to remove the release agent they use when making the ply. Press the hard wood into the glue a section at a time and while holding in place add a flash of thin super glue at the edges (just along where you have it held in place).
Work along the length of hardwood two inches at a time until done.
When done squeeze some PVA into the cuts with your finger.

Brian

[Happy Days]

Well done that Man! :clap:

Thank you Brian, that little trick worked

I did find however that the CA (Super Glue) didn't want to cure when I dripped it onto the joint. I assumed that some of the PVA glue had squeezed out between the joint and reacted with the CA. However, a wee drop of CA Activator solved that problem.

Onward we go with the build!

K.



p.s.
Sorry the picture is hard to see the various parts. (It was taken by flash light) The longer you look at the picture the more you'll be able to make out.

[Fred]

Hi there,

Sorry, bit of a late answer here...  :oops:  Busy days !  :!:

But same as Brian ! I haven't use pins for years now !
If you don't have thin Cyano, you can put a drop of normal basic cyano every inch or so on the white glue directly...
The cyano will work as pins, the best of both world !  

[Happy Days]

Yes Fred, that really works :clap: .............putting drops of thick CA on top of the white PVA glue saves having to hold the pieces together while trying to put drops of thin CA onto the joint.

Thank you both very much for the advise. (No doubt I'll have some more questions for you before long!)

Keith

[Happy Days]

Hey Brian,

I remember you telling me to grp reinforce some part of my Phase 6.

The instructions recomend putting a layer of glass inside the bottom of the nose, but I'm sure you advised somewhere else as well,..didn't you?  :?:

Keith

[Brian]

Hi Keith,
Yes I did, that model is prone to breaking at the wing area during 'crash landing' which is a frequent occurence on some slopes.
So sand the ply (inside) sides and floor from 25 mm in front of the wing to 25m behind the wing and glass these pieces( before assembly is best).
The two formers will have to be sanded to allow for the glass.
Are you going with two wing servos? This helps.

Brian

[Happy Days]

Thanks Brian.

I've already assembled the fuse, however I'd also already sanded all of the ply parts first, for this very eventuality.

As for wing servos, ......................I've cut out each bay in the underside of the wings.





Linned the bottom of the bay with a piece of ply, ( sanded on both sides) and stuck with epoxy,..............





And secured the servos in place with double sided tape. (This servo has not been stuck in yet, had to make a hole down the inside of the wing for the lead first!) :roll:

)



I've also decided not to secure the wings with peg and screws. (Yet) I'm gonna go with banded wings untill I'm be sure I can land this bird gently.

I'll keep you posted!


Keith

ps.
Is your Duck ready yet? It would probably fly very well in all this rain

[Happy Days]

Okay, coming to the final stages of this build, and I'm looking at setting up the control surfaces.

I want to use flaperons. Reason:- to slow the model for landing and reduce the stall speed of the bird, (so she touches down at a lower speed and does less damage.) (At least, that's the idea :?: )

My Tx is a Futaba T6EX. Although it has flaperon ability it's only an 'On/Off' switch. There is no proportional controll of the flaperons. i.e. with the switch off.......the ailerons work as ailerons,.....with the switch on.....both ailerons deploy down by a predertimined % of their total downward movement. (The ailerons will still move as ailerons, but either downward aileron will have a very limited degree of further downward movement.)

My question is;................  What % of total downward movment should I set the flaperons to?
I want to slow the plane as much as possible so as to touch down slowly, but I also want to retain as much roll controll as possible. (To keep the wings level)

Someone clue me in on this please :?:

[Brian]

Hi Keith,
I do not like using full length ailerons as flaps.
It makes the wing more prone to tip stalling.
Also we are nearly always trying to land where there is still some lift.
I would use them as spoilers up to 35 degrees, but in a mix with elevator.
I set this up on my throttle so it is proportional, and so that it works like throttle ie back on stick = slow.

Brian

[Happy Days]

Well thanks for your advise Brian.

My problem is the risk of causing damage during landing. From what I understand, (Which aint a lot! :!: ) flaperons cause the wing to stall at a slower speed. My logic is that a slower speed at landing = less possible damage to model. Spoilerons will slow the model down but I still have to make the plane touch the ground at a faster speed than if I were using flaperons.
Please tell me if I'm wrong on this assumption.

As for using the throttle control for deploying the flaperons,.....can't do that with my Tx :!:  The flaperons only deploy via the "Flaperon" switch. (Had I known when I bought the Tx what I know now, I might have got a different model. It's a wonderful thing,........Hindsight :oops:

Anyway, I won't be maidening her for a few days yet,.........fecking weather :x

Here is a couple of picies. (I couldn't bring myself to put bands on the wings, so for the sake of these photo's the wing is just lying on the fuse

[Brian]

Hi Keith,
You flash git !!  I need sun glasses to look at that :mrgreen:
Have you any mixers in that radio ?.
Spoilerons will slow it  so that it is stopped if you use enough throw.

[Happy Days]

Git!!! :shock: .....you call me a GIT :evil:  What a flagrant insult. I demand satisfaction:.......Cheeseburgers at twenty paces! :lol:

As for the Tx, yes it has two mixer programmes.

Okay about spoilerons slowing the plane, but surely if it slows too much it will stall, and simply drop? (Or am I showing my ignorance?)


K.

[Brian]

Hi Keith,
The model looks really smart,your getting better with each one.
When you use spoileron you 'wash out 'the outer wing half, thus its less likely to tip stall Flaperon has the opposite effect.
As for slowing down too much its a question of flying conditions and degree of surface movement.Thus it's better to have proportional control.
So what mixes do you have ??.

Brian

[Fred]

Hey Keith,

Sory, a bit late on this one !  :oops:
Really looking good  :clap:  :clap:  I agree with Brian, you are getting better and better !

For the flap thing, what you can do after a little while, is to split your ailerons in half.. Add 2 mini servos, and you have a full house glider at really low cost !