ultralight

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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. U

    BAMBOO WOOD & DEMOISELLE ANYONE???

    A RETURN TO BAMBOO WOOD DEMOISELLE ANY ONE? So, I am so brand new to this, it's funny. But I am about to build a Demoiselle. And While I will be as true to the design as possible, BAMBOO, "et all", I would appreciate any of your own information that will assist in any design improvements...
  3. Daniel Tyrkiel

    Why split pins are the safest option for securing bolted connections

    Hello, I don't post much these days, but I thought this may be useful. A salesman from nord lock came in to the place I work at the other day to peddle their special washers and showed us a vibration test using various nuts (plain, nyloc, ovalised, and their own of course) and the graph...
  4. Sir Joab

    Composite Wing Spar for an Ultralight

    Hey guys, I'm working on a design for an ultralight somewhat similar to Airdrome Airplanes' 'Dream Classic'. I'm a collage student studying Electrical Engineering (2 years so far)... I say this to communicate two things: 1. I have a limited budget 2. I can do the math, but my...
  5. S

    New Guy in Ohio: Considering the Legal Eagle Ultralight

    Hello everybody, I'm Dave. I don't fly yet, so I figured an ultralight would be the way to get started. I was considering LSA planes when I stumbled onto the Legal Eagle Ultralight. It's really got my attention, mostly for the simplicity, and partially because it's an ultralight. It's cheap...
  6. 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...
  7. radioinred

    best glue for dacron 1.8 oz.?

    Hey guys, I have just a quick question here.... In my ongoing search for the lightest/cheapest design for an ultralight trainer type of aircraft I have one of many simple questions that I am tired of asking my self. So I thought I'd pick your brains instead. Here goes...... If you were told...
  8. radioinred

    Hey guys, progress report......

    Ok I have redesigned just a few aspects of the fuse and rudder. More to come yet tho.... I will begin on the wing spars next week and try to finish the fuse. The elevator spar is not pictured nor is the new engine. CUYUNA 430! Man I love eBay. I got the block with tuned exhaust, a redrive and...
  9. radioinred

    She is Born.....

    Hey guys Im the college kid who asked a ton of stupid questions about building an ultralight biplane. Well Im home and a few things have changed... First off the project is now a parasol type plane with the slight possibility of adding a second pair of wings. She is a two seater...now dont freak...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. 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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