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  1. M

    Doubling aluminum tube

    They're held with several bolts both horizontally and vertically. The sleeve isn't gonna move. :-)
  2. M

    Doubling aluminum tube

    Thanks for the replies guys. It looks like the glue we observed was simply some low strength contact cement which we theorize the factory used to keep the sleeve in place for shipping. We can't ask to find out for sure since they are no longer in business but it makes sense to us. We were able...
  3. M

    Doubling aluminum tube

    Doing a repair job on a plane that uses doubled aluminum tubes. I have the right sizes and wall thickness, and one slides real nice right into the other. My question is though, are they supposed to be bonded at all or will the bolts that go through them be sufficient for holding the doubling...
  4. M

    To fly or not?

    As long as you're flying a low energy aircraft like the Challenger, suffering an engine failure is almost a non-event so long as you're always flying over landable terrain and you've taken the time to practice landing with no power. That being said, most of the time, 2-strokes are as reliable as...
  5. M

    Rotax Joe

    That's how I understand it as well. But I'm not an engineer so I thought I'd dig around for some more info. Thanks. Anyone else?
  6. M

    Rotax Joe

    Anyone have any additional info on this guy? I hear a lot about Rotax Rick and many (although not all, lol) of his customers are quite happy with his engines but I haven't heard much from Rotax Joe's customers. Anyone on here have any dealings with him or have any experience with his engines...
  7. M

    Rotax mufflers

    What happens if I run a 503 muffler on a 582? I am aware that I can cut the muffler to 582 specs (which is what I will do) but I have a buddy who wants to break in his new 582 but has a 503 muffler on it. I want to know if I need to tell him to cut it (or replace it with a 582 muffler) before...
  8. M

    Sleeved tubes vs. thicker walled tubes

    With regards to strengthening the tube for bolting purposes, what about using a delrin (or similar) plug? I guess that would probably only work at the tube ends.
  9. M

    Sleeved tubes vs. thicker walled tubes

    Can anyone help me understand why some designs include sleeved tube construction? I see this mostly on aluminum tube bolt together designs. Is there an advantage in doing this over just using a thicker walled tube? Do you get better strength or flexibility or fatigue resistance or something...
  10. M

    Electronic Fuel Injection for 2-stoke

    Has anyone installed one of these systems on a 503 (or similar engine)? http://www.ecotrons.com/products/2_stroke_small_engine_fuel_injection_kit/ I'm interested in it for both improved fuel efficiency and not having to constantly adjust my carbs between seasons. (I live in Canada and fly in...
  11. M

    Troubleshoot - Rotax C gearbox on a 582

    Thanks! :)
  12. M

    Troubleshoot - Rotax C gearbox on a 582

    Thanks. I'll pass that along.
  13. M

    Troubleshoot - Rotax C gearbox on a 582

    Not that I'm aware of. If the prop stalled, would that cause it to overspeed like that? I always figured a prop with too much pitch would bog the engine down but I'm not sure what happens if a prop stalls.
  14. M

    Troubleshoot - Rotax C gearbox on a 582

    A friend of mine is having trouble with his 582, probably his gearbox... He runs the engine to full throttle and gets 5500 RPM, then it jumps very quickly to what sounds like 7000 (or maybe even higher - I haven't confirmed this yet though since I've only seen a video) He's running a 68" three...
  15. M

    Gearbox clutch - pros and cons?

    Would a clutched gearbox also allow a person to dive at higher speeds without having to worry about overspeeding the engine at low throttle? (ie. unloading the prop causing EGTs to rise and revving it faster than it should be with less than normal fuel/oil flow)
  16. M

    Gearbox clutch - pros and cons?

    Interesting, thanks!
  17. M

    Gearbox clutch - pros and cons?

    I've seen Hirths and MZs with gearbox clutches and I'm wondering why? What's the advantage? It seems to me that there are a few disadvantages but I can't think of any advantages. The prop will free-wheel with the engine at idle (or off) making your glide ratio worse, and you'd never have a hope...
  18. M

    Strut fairing installation options

    Please do! I'm very interested to see how you did this!
  19. M

    Photography

    Not my pictures, I'm the subject. This fellow noticed me flying and followed me to the airport. He introduced himself as a photographer and asked if he could take some pictures of me and in return, he'd share them with me. Sounded like a good deal to me!
  20. M

    Strut fairing installation options

    Nope, don't want no stress risers. Thanks for the heads up!
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