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  1. radioinred

    turbine cri cri daydream

    I am totally enthralled with the cri cri build by madrocketscientsist. I found a model turbine powered version and I wondered if you couldn't simply slide the engines farther aft, move the wing/main gear back to compensate for the CG shift. I made this model today to illustrate. (I haven't found...
  2. radioinred

    This many lightening holes cannot be safe!

    Hey guys its been about 18 months since i last poked around in here. Hello to all! Things are good for me, I got my SEL private a couple weeks ago and i am at SDSU in the aviation program. Have you guys seen this video? Talk about deviating from the plans....... This guy " shaved 15 pounds off...
  3. radioinred

    Best Rivets?

    Hey guys, quick question here..... What would be recomended for the texas parasol angle aluminum? I think I'll choose the single 5/32 option but I'm not sure wich type of rivets to use.
  4. 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...
  5. radioinred

    Where's my choke?!?!

    Ok guys im really stumped with this one. I just got my hands on a mikuni carb (gratis) from a friend and I cant tell where the choke is on it! Theres no choke cable.... not even a spring port where I would expect to see one. The only markings on the dang thing are MIKUNI H9. Help if you can...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
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