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SDF

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  1. I don't think those PAW prices are correct. The Jan 2016 list price for the PAW 09 DS (non-r/c) is £62+VAT and for the r/c version its £75+VAT.
  2. Lets not perpetuate this nonsense. Danny is completely correct and Mal is wholly wrong. It is the leadout position wrt the CofG that matters the belcrank within reason can go anywhere. It is, however, usual to try to place the belcrank such that the rake of the lines is tangential to the arc of the lines in flight. This avoids a bend in the leadouts where they exit the wing.
  3. Erflog, (Looks like you spotted the error whilst I was typing) I think there is and error in your calculation. You appear to have multiplied the mass by the speed then squared the result making your estimate of the force a factor of ten too big. 40 lb = 18.1kg 30mph = 13.4m/s 120ft = 36.6m 18.1*(13.4^2) / 36.6 = 88.8N or just over 9kg or at 40mph just over 16kg But I think 40 mph might be too low a speed for such a machine to fly so it would probably still need to be tethered to the preverbial immovable object.   Edited By SDF on 24/06/2013 21:53:12
  4. I like sewn hinges, cheap to make and very low friction.
  5. SDF

  6. We had a demo at the club I used to belong to of how to glass a wing but can't remember who it was by now. Use laminating epoxy as already advised. Thin this as required using pure methanol. Lay the glass cloth over the wing. Don't try to use a brush. Pour the epoxy sparingly onto the cloth/wing and then use a camel hair paint roller cut down to about 2" wide to spread the epoxy. Gives really good results with just the right amount of epoxy to properly wet the cloth without excessive weight gain. Pop the roller in a jam jar of acetone before the epoxy sets and it can be reused.
  7. Available for purchase from this very site
  8. I think I may have a copy. What I'm not sure of is where it is. I'll have a rummage and see if I can find it.
  9. SDF

    Can it be done?

    Are you trying to tell me you can't fly both the popular modes?
  10. SDF

    Can it be done?

    I could never really see the point of buddy leads. What is the problem with passing the TX between tutor and trainee? Thats how I learnt to fly. Keep it simple.
  11. You could solder it with the butane torch but it would be very difficult to ensure the wire is not over heated and its temper lost. The wire won't go brittle it will go soft. Personally I would spend a little more on an electric iron they are not really that expensive.
  12. You do realise Diamond is a form of carbon and will burn quite nicely. I would suggest keeping them away from the torch unless you want to buy some more. A (probably) cheaper alternative is a bit of brass tube sharpened at the end with knife.
  13. I googled Waco SRE and came up with a 3-view, a Peter Rake plan from Traplet, a Walt Mooney plan, a Sterling 33" plan, a Sterling 13" plan and an Earl Stahl 21" plan. I also found a lot of google images photos but the link to that won't work on here. Edited By SDF on 06/04/2013 19:32:10 Edited By SDF on 06/04/2013 19:32:35 Edited By SDF on 06/04/2013 19:33:18 Edited By SDF on 06/04/2013 19:34:34
  14. "Building & Flying Indoor Model Airplanes" by Ron Williams - the best aeromodelling book ever published IMHO. "Model Aircraft Aerodynamics" by Martin Simons - great book on the fundamentals of how model aircraft fly.
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