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  1. Autodidact

    The big video topic

    I don't post much anymore, but I thought I would make an exception for this:
  2. Autodidact

    Darryl Greenamyer

    I'm a fan of DG, so take it for what it's worth. Everybody has failures; how would anyone else have performed tramping around on a glacier in Greenland with limited resources? And there may have been a judgement call in play; if they didn't get it out then, would it have ever been gotten out...
  3. Autodidact

    Driveshaft development

    But you did get it done, and I can't say that I don't admire you for that. Bret
  4. Autodidact

    Driveshaft development

    Dan! The guys name was Dan, now I remember, and here's the thread: https://www.homebuiltairplanes.com/forums/showthread.php?t=18881&highlight= A good and productive discussion with lots of good input from various quarters.
  5. Autodidact

    Driveshaft development

    Hi, Ross. As I remember from a thread you started a year or two ago, you had actually hired an engineer who did understand TV, to run that math model for you, as well as try to explain the concept behind the math to you; what was his or her name again? Bret
  6. Autodidact

    Between-the-war aircraft replicas

    Wow, me too, I guess. But I think I'll leave it there as a monument to whatever it was I was trying to say.:emb:
  7. Autodidact

    Between-the-war aircraft replicas

    We say bad things about the French. It is unwarranted. Remember that the British were pushed off of the beach at Dunkirk. The French aircraft were excellent, and they also had good planes like the Curtiss, which in the CBI theater were said to be able to turn with Japanese fighters (Hayabusas)...
  8. Autodidact

    Photo report: Deutsche Museum Oberschleisshiem

    Is that spot welded? Also, cute little biplane down at the end there (D-EDMH).
  9. Autodidact

    Lippisch DM1

    I wonder how much skill it would take to fly a DM-1?
  10. Autodidact

    Pegasus O-100 airframes

    A slightly enlarged, all metal, redesign of the Heath Parasol. Most any small European single seater like the Druine Turbulent, Jodel Bebe, Brugger Colibri, etc.
  11. Autodidact

    O-100-- interesting new engine

    Beautiful airplane. Supermarine Sparrow II would fly great with a DP-100 I bet!
  12. Autodidact

    O-100-- interesting new engine

    Wow, been up for a day and there's already 2,200 views. I think for something as esoteric as a small engine for homebuilt aircraft, that's a very good indication of interest.
  13. Autodidact

    Scrappers tube bending jig

    Good stuff, very practical.
  14. Autodidact

    Stabilization against buckling.

    I think Mad Mac hit the nail right on the head (if the formula is not extremely complex) and that Beam Column is the proper approach for this. In fig. 1., you have a buckled column with compression and moments equal to compression force times the lateral displacement (which Billski pointed out)...
  15. Autodidact

    Cassutt - looking for anyone who knows anything about it

    Here's some contrast; I think the tail on the silver one has better proportions and I like the slightly raked LE, and it looks a little bit bigger:
  16. Autodidact

    Stabilization against buckling.

    Heh, I always did the quick bounce and that would crush the can nicely - I'm not sure I ever had good enough balance to do the side poke trick and I'm not sure I ever even heard of it until you guys brought it up!
  17. Autodidact

    Stabilization against buckling.

    Thanks, proppastie. You did spur me into finding my old copy of Bruhn (wasn't sure I had one). The subject matter you posted is actually in a completely different chapter from my old 1949 copy (smells slightly funky!), but mine might not have the Gerard method. Will look at this more in the next...
  18. Autodidact

    Why was the Cub a ...

    I hate to waste things, and the Pawnee is not as useful as an ag plane as it used to be, and the usual two seat conversion is ugly, but this would make a good military trainer for air forces with a budget (Matthew posted a different video of this on Secret Projects)...
  19. Autodidact

    Why was the Cub a ...

    I've never seen that; what is it (a low wing Cub, obviously, but...)?
  20. Autodidact

    Stabilization against buckling.

    I've read several different descriptions of crippling, given by people from different engineering disciplines, and the details of the descriptions seem to be driven by what that person learned about their specific area of engineering, but they all involve exceeding the materials yield point...
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