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Messages - johnfireball

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211
Scale / Airco DH2
« on: January 20, 2012, 20:40:55 PM »

212
Scale / Airco DH2
« on: January 20, 2012, 16:50:03 PM »
Hi all,
      Thrust problem solved with use of an 8" slow fly prop which suits my low rpm geared motor. Yes Keith dh2 was powered by a 100hp gnome rotary engine
   http://www.youtube.com/watch?v=CYc-H8Wg-MQ
 Apparently this engine was a barn find

Undercarriage and new prop



John.

213
Scale / Airco DH2
« on: January 19, 2012, 00:16:22 AM »
Hi All,
       A little more done and testing of all the gear in progress.

Tailplane construction

 

Laminating fin outline



Gear installation



Overall view with base colour applied to flying surfaces



Hi Keith,
           I think you may be correct about prop pitch. With testing I can run at full power for 18+ mins per charge but feel I'm lacking thrust. No signs of overheating. Amazing power for such a small motor. Do the gears need lubrication? The motor is also turning the dummy engine and doesn't seem to be a problem. This motor could not be a better fit in this model. I could fit an 8" prop with more pitch to try gain some more push as I feel the rpm of the prop is quite low. Any suggestions welcome.
John.

214
Slope Soaring / Glider info
« on: January 16, 2012, 00:14:02 AM »
Hi all,
       Anyone got any info on this glider? I can't find anything on the net. Might fancy as next project for a lightweight sloper. The wing construction looks quite unusual but would have to make the tailplane correct to scale. I like that shape with the faired in wings.yea I'm a scalie at heart.
  http://www.theplanpage.com/Months/2208/wm.htm
John.

215
Scale / Airco DH2
« on: January 13, 2012, 18:04:51 PM »
Hi John,
        I tested my roll on pink foam and it takes no problem. I'm not sure if all roles of film will behave the same as on the forum link it is suggested that high iron temperatures are needed where mine will melt if iron is too hot.
http://www.presco.eu/sub-category.php?ID=4&parentCatID=1

Link to where I got mine it's the 30micron roll on the top right.
John.

216
Scale / Airco DH2
« on: January 13, 2012, 17:13:58 PM »
Hi John,
          This film is available at any graphic art printing consumables supplier it is called laminating film not to be confused with encapsulating film. The gloss finish type is cheaper but not sure about paint adhesion. If you wish I could send you some of the 30 micron in the post. This stuff is a pleasure to work with.
John.

217
Scale / Airco DH2
« on: January 12, 2012, 21:50:03 PM »
Hi all,
      A little more progress made and experimented with a different covering film. I found a discussion group on the net and the idea looked good.

http://www.rcgroups.com/forums/showthread.php?t=274520

 So I got hold of a roll of this stuff and I can honestly say I am a convert. It's very light preglued and quite easy to use,I covered this wing in one piece for top and one for the bottom.  Available in 3 thicknesses (30 micron, 42 micron and 70 micron) and either matt or gloss finish only disadvantage is transparent only so needs to be painted. I opted for matt finish as I think it takes paint better. The water based paints that the warhammer shop sells take very well and can be airbrushed.
                 A few pics of covering procedure

Lay covering over frame on flat surface
   

Tack the edges down with the iron set on silk, Dont need to be too fussy.



Retack all edges with iron set to wool and be sure they are well stuckand then shrink all over on wool setting .

 

Finished wing (not one wrinkle)  with 200 meter roll of covering film, a lifetimes supply. The roll  cost approx €50.00
If anyone wants to try some let me know, you wont be disappointed.
John.


218
Slope Soaring / Foam Quark
« on: January 09, 2012, 00:27:57 AM »
Thanks for the vid Fred. Perhaps if we keep quiet no one will notice the unplanned landing at the end. Nice bit of cello. That's what I get for camera posing.
  Regarding this expo thing I studied my transmitter manual and have discovered that I have a choice of dual rate or expo so that one or the other is always on and I also found that my transmitter was set for expo at 100% in the wrong direction( hence the sensitivity problem). Someday I'll perhaps get it right.
John.

219
Slope Soaring / Foam Quark
« on: January 07, 2012, 21:08:46 PM »
Hi all,
     I love it when a plan comes together. A toast to paper and foam. What a glider!!! I'm afraid the phase is now for the history books. This machine is so responsive even with only 50% throws. I had my gear set up for dual rates and switched to full rates at height, well I had to quickly reset as it was tooo much for my ability but gave me a feel for its future capabilities. Yet with small control surface movement she is very easy to fly with no bad manners that I could detect. Flying weight at 1kg is I think perfect. She flew off the board with just control surface movement needing to be reset on my transmitter.  You just gotta get yourself one of these (big grin, dreaming of flick rolls). Now what's that blender thingie? Cant wait to see vid Fred.
John.

220
Slope Soaring / Foam Quark
« on: January 07, 2012, 13:03:15 PM »
Hi Fred,
          Yea will head up around 2  still think there is too much wind but it is forecast to drop later.
John.

221
Scale / Airco DH2
« on: January 06, 2012, 00:46:37 AM »
Hi all,
       I'm back to bore you all again. Thanks again to keith for electric advice, I believe the motor will fit in symetrically so hopefully no problem there. You could well be right about prop pitch. This is a beautiful little kit, it's my first laser cut build all others I have done were from paper plan only (what a difference in accuracy), however it's not for the novice the instructions are nonexistant and a good knowledge of build techniques and plan + parts studying is required or you will end up making a major cock up. The wood used is strong but heavy  and I fear the final weight may be more than I anticipated.
             Anyway some photos of wing build showing modification for ailerons and dihedral setting. I plan on covering the wings in one go using the covering material as a hinge so note the angle of the aileron leading edge to allow down throw.
As an aside John from up north I notice from a photo in your workshop a tigermoth GAYIT, I flew in this plane in the seventies, loops, spins, etc at a gliding event in Kilkenny. It was a friend of the Dads Jeremy Bryson who piloted. We wore leather caps and all the gear, a memory I will cherish.
John.            

222
Scale / Airco DH2
« on: January 04, 2012, 23:36:19 PM »
Hi Keith,
          Thanks for assistance, as you say I'll have to suck and see. So I don'tneed a voltage regulator as the esc does the job (more weight saved). The gearing on the motor is 7:1 and the long output shaft appealed as it has to go through the dummy engine. I just hope it has enough oomph to drag this fully rigged biplane through the air.
        Some more done on the cockpit

Inner side panels added ( showing rigging wires) cockpit surround added. I'm very attatched to my home built wicker seat just need to add seatbelts and a pilot.

       

These are the outer side panels originally fabric stitched around the airframe. I have used brown leatherlook embossed paper used for fancy box manufacture, will add stitching and attatch after painting.



John.

223
Scale / Airco DH2
« on: January 04, 2012, 16:35:53 PM »
Hi Keith,
          Thanks for help. Here's the setup I ordered, hopefully it'll work out. What do you think? It will be my first foray into electric. My guess is that the final weight of the model with gear will be around 150grms  I would like the model to fly quite slowly to look more scale.I have also ordered a voltage regulator to power reciever and servos from one lipo.

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9386

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6455

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9028

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9670

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8044
This kit is actually quite simple but I seem to always have to complicate things. I think I'll get to fly my quark this weekend.
John.

224
Scale / Airco DH2
« on: January 04, 2012, 00:03:57 AM »
Hi all,
      I have began my next project, it's a first world war DH2 of the type my grandfather flew, bought in kit form (aerographics), 28" span and my plan is to convert it to 3 channel rc with electric power.
Some work done on dummy engine
 
And the lewis gun,  wicker seat and inst panel


More to follow,
John.

225
Slope Soaring / Foam Quark
« on: December 30, 2011, 22:42:47 PM »
Hi Fred,
         Forcast for tomorrow force 5-6. Could be there at 11am. I will text you my phone number. Would fly phase first and if ok then try quark.
John.

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