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  1. G

    Redrive prop hub face runout

    Can anyone advise an acceptable level of run out (fore and aft) on a redrive prop hub face? Is 2.5 thou at a 2" radius acceptable. or could that indicate a past prop strike?
  2. G

    503 DCDI electric start

    Hi Wonder if anyone has experienced this? 503DCDI, pull start... for some 10 years... ALWAYS started 3rd pull on the string, no matter what the weather. Converted to electric start (using 582 mag end starter) now.. tuns over at "high revs like a good un"... but reluctant to start.. no matter...
  3. G

    Firewall material

    Has anyone ever use Intumescent paint as a supplement to "improve" a more "normal" ali/stainless firewall? Such as below ............... seems useful Fire Free 88 fire resistant paint Although normally used on steel building frames, I know it has been used on competition cars etc
  4. G

    Fabric Rivets and Washers

    Please forgive a naive question. Whilst I fully recognise that washers are designed to "spread the load", can any one advise just what would be the purpose of washers under the fabric retaining rivet heads (as called for in procedure manuals) on, for example wing ribs, under the following...
  5. G

    Purpose of fabric to metal joint

    Please forgive a few naive questions and ignoring any certification aspects. Assuming a metal framed, fabric covered flying surface, horiz stab for example, with in a single piece fabric "wrap", (trailing edge to leading edge and back to trailing edge) using a standard fabric to fabric joint at...
  6. G

    Poly Tak and Super Seam

    Does anyone know for certain.if Poly Fiber Poly Tak cement and the "new" Ceconite Super seam ARE the same formulae now. Ignoring the "sales bumf" saying "only use ours" and any legalities, I believe it is possibly the same now they are all under the same company. The reason for asking is that I...
  7. G

    Lord mounts with horizontal axis

    Can anyone advise the advantages, or disadvantages of mounting Lord mounts with their axis horizontally instead of the more normal vertical axis for an inverted 2 stroke as in pic attached. I understand the advantages of angling the mount axis to "point to" the centre of mass, but not these
  8. G

    Crosswinds and tire width

    Can anyone advise, or point me in the right direction, as to the effect on crosswind capability of a taildragger (I realise the pilot is often the limiting factor!) of reducing the tire tread width. say from 6 inch tread width to 3 inch. (assuming all other aspects are ok) Would for example...
  9. G

    Check flight.. Austgralien style

    Just received this cry for help from an Australian friend who has failed his check flight. Any idea why:-) G'day Mate, I am writing to you because I need your help to get me bloody pilot's licence back. You keep telling me you got all the right contacts. Well now's your chance to make...
  10. G

    Forget rag and tube. use your printer.

    Just consider the implications.. The first flight of an aircraft designed and MANUFACTURED by BEING PRINTED using a 3D printer in only 5 days has taken place. Admittedly only a 1.5M wingspan test model. World first: UK boffins print out working 3D aeroplane • The Register
  11. G

    UK to Oz flight

    Not strictly "homebuilt" but I though you might get inspiration from this Dave Sykes a Paraplegic has set off to fly from the UK to OZ, some 12000 nautical miles in a Flexy Ultralight.. obviously taking his Whelchair with him strapped to the side! He left Rufforth, Yorks yesterday, but wisely...
  12. G

    HP, Torque and props..

    I believe HP sells aircraft, but Torque drives them along,.......... I realise that max cruise and max take off pitch performance conflict. Assuming one could obtain suitable redrive ratios (2 stroke) and prop, if the engine produces max torque at well under max HP rpm, which in turn is below...
  13. G

    Extended nose

    I am about to modify a single seat taildragger with a lighter engine of roughly the same output and prop. Basically 2 options to retain CofG position.. a. move me forwards 4 inches which is feasible or b. extend nose and move engine forwards by about 20% of it's current distance from CofG If...
  14. G

    Carbon mufflers

    Anyone had any experience in using carbon mufflers on aircraft 2 strokes? It appears that they do not like continuous high revs and high exhaust temps?
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