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  1. J

    Sheet metal techniques for the ham-fisted

    like i promised, here is a couple of pictures of beading die:
  2. J

    Sheet metal techniques for the ham-fisted

    I'll take detailed pictures and post them tonight.
  3. J

    Sheet metal techniques for the ham-fisted

    I made beading dies of phenolic sheet, .188 thick and glued them to a plywood. The markings on the bottom panel is for aligment with the rib and just put them in the press.
  4. J

    Pre-Forming sheet stress/strength question

    And how it's look after forming:
  5. J

    Pre-Forming sheet stress/strength question

    Here's how I formed a skin for horizomtal stab: http://youtu.be/flSPqcToOFY
  6. J

    Bringing the engine forward, what/where does this effect ?

    Danger zone, pozdrav! I'm not sure that have electrical system so I didn't mention the battery.
  7. J

    Bringing the engine forward, what/where does this effect ?

    If you have something to move, move forward in front of of pilot as far as you can. If you dont, you can put the ballast on the firewall if MTOW allows. A lot easier than moving the engine. Cheers
  8. J

    Bringing the engine forward, what/where does this effect ?

    Traveler, you say that your airplane nose heavy? If so, you should do the opposite, put the engine closer to firewall, or leave it where it is. Did you calculated that moving pilot back exeeding rearward CG limit?
  9. J

    D-Motor LF26 gains ASTM certification

    It's way too much for me. I'll stick to the good old VW....
  10. J

    Re-tempering 6061 T-6 after annealing?

    Dana, for small parts its works. Here is a piece of .016 6061 made in a way I mentioned:
  11. J

    D-Motor LF26 gains ASTM certification

    It is almost the same price as in Europe. I think it cost over 12,000 € in Belgium.
  12. J

    Re-tempering 6061 T-6 after annealing?

    Well, Fritz asked for "homebuilder rule of thumb" for parts that are non structural. Do you think the method with the torch would not be good for such use?
  13. J

    Re-tempering 6061 T-6 after annealing?

    Fritz, I think the easiest method for anealing is using a temperature indicator crayons and torch. These crayons make marks that melt within 1% of their rated temperature. As for quenching, the rate of cooling is not so important altough it is safer to cool quickly. I believe that would be...
  14. J

    Sheet metal techniques for the ham-fisted

    Thanks guys! I thought about the log but, if I started it it will not be regularly updated:ermm: Lynn, you are right, aluminum "feels good" in your hands when you get used and it is a real pleasure to work with it...
  15. J

    D-Motor LF26 gains ASTM certification

    "...recommendation of a 2000 operating hour TBO" That sounds good but is any engine reach that yet? And, what us the price in the US for D-motor?
  16. J

    Sheet metal techniques for the ham-fisted

    Larry, Ultracruiser is slightly larger than Hummelbird so it can accommodate larger pilot (and I am quite heavy:ermm:)
  17. J

    Sheet metal techniques for the ham-fisted

    Yes Larry, it's a slightly modified Ultracruiser.
  18. J

    Sheet metal techniques for the ham-fisted

    Thanks BJC! I forgot to mention that you can make nice curves in a metal work.
  19. J

    Sheet metal techniques for the ham-fisted

    Matthew, should not take much time to learn to do proper sheet metal work. Here is couple of pictures of my work. Ribs are formed over wooden forms, flanges are fluted with fluting pliers, the hole flanges are made with simple tool with two metal rollers and reinforcing beads are pressed with...
  20. J

    UL SAILPLANE - Footlaunchable, foldable

    It is the same strength as the Avex rivets that I thought suggest you. I checked in the meantime...
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