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  1. P

    Murphy Renegade Spirit Kit

    I Have the newer style rectangular main spar partial parts kit, This has plans, build manuals [old and newer] , all bent pcs ribs ect, fiberglass parts, extrusions,and any hard to make parts Plus a prop. winshield, tailwheel and bracket, pito tube and about all the aditional aluminum tube and...
  2. T

    Acrolite 1B

    I'm new to this site and don't mesh with the software yet. I did want to ask a question though and hopefully this is the right forum. Is anyone out there in homebuilt land building an Acrolite 1B or know o anyone who is? I have started one and am making steady progress but I would sure like...
  3. radioinred

    still at it.......

    Ok I know I know.... I cant make myself quit. The numbers work out right cg, cL, static margin, weight..... The obvious problem is the uncertainty of the structural integrity of the fuse. I took the practical (though not advisable) route. I stood on the tail and ..... ...nothing. not a...
  4. radioinred

    undercamber VS. flat bottom (airfoils not fannies)

    Hi all, Im the kid who is designing the UL bipe with the little 250 snowmobile engine. I am currently looking for the best airfoil for my wings. Things I know: 1) I want to cruise at or around 55mph 2) MTOW is 600lbs 3) horsepower is about 27 with redrive and powerfin. I have been going back...
  5. radioinred

    UL biplane in the design stage

    Ok guys, heres the plan. Ultralight biplane with 20 ft. span top and bottom, 4.5 ft. chord, flat bottom Clark Y type airfoil, half span ailerons on the lower wing, none on the upper. I want to make (4) 10 ft. spars by laminating (4-5) 1/2X6 in. poplar planks together with a very strong epoxy...
  6. radioinred

    HELP WITH SNOWMOBILE ENGINE!

    Hello all, I have just recently purchased a polaris colt 250 twin engine. It starts on the first pull everytime and it sounds great. My question is, Where can i find a belt reduction drive for it and more importantly how can i establish things like redline rpm, Does anyone know anything about...
  7. radioinred

    Newbie with questions!

    Hello there everyone, i've been reading the post for a long time and i finally registered. I am 21 years young, I am studying to be a mechanical engineer at the moment. I have flown remote controlled planes , helis, jets, of all varieties. Electric, nitro, gas, gliders, you name it. This summer...
  8. Dana

    New design project: Aerobatic ultralight biplane

    Like many pilots, "I want it all". Unfortunately nobody's making the low cost fully aerobatic ultralight amphibian bush plane I want :dis:, so I guess a few compromises are in order. After the UltraStar I'm flying now only meets two of those criteria (ultralight and low cost). One could put...
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