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  1. Sir Joab

    MIG welding Aluminum

    Hey guys, I'm in the middle of building a 1/2 VW and I need to weld new intake ports on the aluminum heads I cut in half. I have a MIG welder (unfortunately only 120V input) and 100% Argon gas, but on my test pieces I can't even get the welds to "bite". The metal from the wire just beads up on...
  2. Sir Joab

    Experimental Aircraft Regulations in the U.S.

    Hey guys, I'm in the middle of building a Part 103 Ultralight of my own design... and I think I'm hooked on this aircraft design stuff! Anyway, I'm now starting to dream of designs for larger planes (4-6 place). Can you guys point me in the right direction to find the requirements I must meet...
  3. Sir Joab

    HP produced @ RPM

    Hey guys, about how many RPM does a 1/2 VW achieve max TQ, and/or max HP? I'm sure it varies a bit from build to build, but I'm looking for a ballpark number. 3000 - 4000? I know they're low-RPM engines. (It's part of why I've chosen to use one.) I'm planning on converting my own 1/2 VW, so...
  4. Sir Joab

    To weld, or not to weld?

    Hey guys, I was talking with a friend of mine who works for Boing, and he said that commercially made aircraft are never welded... Is this true? I know that welding, especially with aluminum, causes the material around the weld to become weaker, but is this bad enough to avoid welding all...
  5. Sir Joab

    "Dragon Wing"

    Hey guys, this is more of a hypothetical question than an actual design at this point. I was thinking (ever since I watched "How to train your Dragon"...) about making a wing structure that is modeled after what we imagine a dragon's to be. The big advantage would be it's ability to simply...
  6. 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...
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