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Messages - johnfireball

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226
Slope Soaring / Foam Quark
« on: December 30, 2011, 19:12:17 PM »
Hi all,
There maybe a weather break tomorrow so might get first hopefully not last flight in before the new year, anyway batteries are being charged.
John.

227
Slope Soaring / Foam Quark
« on: December 29, 2011, 22:48:04 PM »
Hi Keith,
          The wings are held by short pieces of silicon tube on a forward wing pin. It's a bit tricky to assemble but hopefully will do the job. On my plouf I put thin strips of masking tape on the wing joiner rod and these hold ok with friction and dont wreck the fuse on hard landing. I will only use the silicon tube if the wings loosen up as they are holding firmly at present with friction alone.
John.

 

228
Slope Soaring / Foam Quark
« on: December 29, 2011, 17:06:28 PM »
Got her finished today, rather pleased. I learned a lot with this build and many things I would do differently so if anyone is thinking of having a go with paper and foam I can give advice .  



Rearview with kids. I painted it with household emulsion. I needed a lot of noseweight 200grms, bringing total to 1000 grms. so it'll fly and crash fast (gulp). Just need to get 6mm carbon rod for wing joiner and she's good to go. Forecast is gruesome all weekend and next week so will have to be patient.



Next project Santa sent. Plan is to convert to rc electric, its 28" span and being new to electric advice on motor size, lipo etc would be appreciated.
John.


229
Slope Soaring / Foam Quark
« on: December 28, 2011, 01:45:04 AM »
I'm Baaack,
               
 Foam cut sanded and ready for covering


Wing servos and horns fitted and glued used hot glue gun to glue in servos and epoxy for horns.

I'm enjoying my venture into foam and paper and learning different techniques if I could turn back the clock I would hinge the ailerons as I have the fin, I would then not have any plastic hinge tape on the model and could then finish paint it with household emulsion of which I have loads of in the shed. I may mask off the hinges and use a cobination of acrilic and emulsion. I started this build as low budget and will try hard to keep it so. Its killing me having to buy a 6mm carbon rod joiner I,m using a wooden dowel to line up the build. The fin really brings this glider to life
Hi Fred,
           Great if you come to Killakee I am planning an elevon tailplane mix perhaps to do flips, airframe weight with servos 620 grms. She's a fab looking glider and I look forward to maiden which is not far off (will let you know). By the way only live round the corner from you.
John.

230
Slope Soaring / Foam Quark
« on: December 26, 2011, 00:40:58 AM »
Happy Christmas to all,
Yea I know its Christmas but no better time to melt foam.
Build progress, fuse complete and servos fitted just needs fin and connections. I fear she may be getting a little fat and will probably weigh similar to my phase. I like the look (very French if you know what I mean). It is perhaps an early Citroen. Can't wait to fly her(it'll go like stink and then I'll break it)
Happy new year,
John.  


231
Slope Soaring / Foam Quark
« on: December 23, 2011, 19:45:17 PM »
Hi All,
      Some more progress made.



 I had to laminate foam pieces together as my foam was not thick enough. I cut the templates from hard cardboard 1.4mm thick, they work but not great (cutting wire catches).

I have now covered the wings and completed the tailplane which I made from foam  sanded to shape, added carbon trailing edge and covered.
 The wings are now weighed down in their outer covers and will remain there for a few days to dry out. The paper and pva dry out very rigid and hopefully wont warp. This so far is the cheapest model I've built as all materials I had to hand. It's a bit of an experiment and learning as I go but  so far pleased with results. It's my thrifty recession Quark.
 

John.

232
Slope Soaring / Foam Quark
« on: December 21, 2011, 21:14:29 PM »



Some progress, have glued in 5mm solid carbon spar and tubes for 6mm wing mount. I used my soldering iron with a ruler to melt out the spar channels. The incidence pin tube is 5mm brass with 4mm carbon pin. I have taped  carbon strips to the trailing edges and will hopefully get a better sharper finish.
   I have tried a water based varnish to seal the craft paper and it works really well as a base coat for spray paint, so might not use tape. Waiting on lightweight filler to dry and will then cover.
John.

233
Slope Soaring / Foam Quark
« on: December 20, 2011, 21:18:03 PM »


Hi all,
     Having never worked with foam before I have decided to have a go at making a foam 1.6m Quark as per Freds plan. Two unsuccessful attempts with an assistant at wing cutting in one go I decided to try it in two stages.I started by cutting blocks of foam 5mm all round bigger than wing size  I soldered wires to the templates(in the pic the wire is broken off the back of the root template, I caught it in my jumper). I double sided taped the templates to the block ends (checking allignment) and with an assistant managed to cut 2 opposite and useable wings in two passes per wing of the hot wire.  They needed a little sanding to remove lines caused by slow wire speed at the wingtips. Cutting wings this way requires a little sanding of the leading edge ( you can see the waste that needs removing on the leading edge in pic.) and cutting a sliver of foam from trailing edge using a knife and steel rule.
             The small wing below the foam is a test piece which has the same profile as the quark wing. After it was cut I rolled it with a coat of PVA glue, allowed it to set off somewhat I then glued out craft paper using the same glue and roller and covered the wing top and immediately after covered the bottom and then weighted it down to dry. The result is a good stiff wing which hardly requires a spar although I will fit one.
            Paper finish is difficult to paint so I will most likely be taping also.
John.

234
Slope Soaring / Blast from the past
« on: December 14, 2011, 22:29:57 PM »
Hi all,
       Rooted this out of the back of a wardrobe in the brothers place. He used to fly it in the early 90's. The covering was ruined so I stripped it off and recovered in craft paper, just needs paint now. It has big control surfaces so I am hoping it will perform.
John.
 

235
For Sale / Retracts set swop
« on: December 04, 2011, 00:12:55 AM »
Hi all,
       Have a set of unused mechanical retracts with fittings and tailwheel from my 1200mm spitfire. Will swop for 2 servos 12- 14mm thick for my middle phase wing. Anyone interested?

236
Slope Soaring / I'm drowning, in bits of an Mu28
« on: December 01, 2011, 23:57:40 PM »
What I would do,
                       Glue it together on the flat best as you can (eyeball is pretty accurate). When you go to veneer and gluing all will probably change(warping, glue shrinkage and whatever) steam from the kettle is a great corrector. Glue something, get going and it'll work out.
John.

237
Slope Soaring / I'm drowning, in bits of an Mu28
« on: December 01, 2011, 23:30:09 PM »
Hi again Keith,
                   The taper is usually on the top surface so the bottom is flat unless you need washout whereby you pack the tip trailing edge.
John.

238
Slope Soaring / I'm drowning, in bits of an Mu28
« on: December 01, 2011, 22:07:03 PM »
Hi Keith,
          Why not join the wing sections without the outer waste being used. pack the leading and trailing edges with wood spars laid on your flat building board and glue wing together.
John.

239
Slope Soaring / Mini Toons type close-in aerobatics sloper
« on: November 27, 2011, 22:59:13 PM »
Hi Fred,
         Have you got any epp quark kits? Would like one.
John.

240
PSS / Spitfire maidened
« on: November 27, 2011, 00:45:15 AM »
Hi John,
          Yea I think weight is the way to go for windier weather( I think it would need an awful lot)   but so surprised how it soared better than my thin winged gliders.
John.

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