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  1. Y

    Christavia renewal and build log!

    First time in the shop in almost a month. Between vacation, annual recurrent training and flying your family and loved ones around, this summer hasn't given me much time off since July 4th! Cut and gang shaped 8 bungee retention ears. They that got welded onto the shock struts, but I didn't...
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    Christavia renewal and build log!

    At long last she's sitting on her own gear. Albeit, gear that needs new bearings, a surface cut from the rotors, new pads, wheel balancing and brake lines run... from rudders that haven't been built yet, but here she is. It looks like the left wheel is for some reason just a little bit more...
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    Christavia renewal and build log!

    I got the inner tubes welded up except for the bungee retention ears. I also milled out the "extended to retracted" travel limit slot that the larger tube's limit bolt travels in. So now I have a big question. The plans are the same size and style as a J-3's bungee system. I know that the...
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    Christavia renewal and build log!

    Happy Fathers day everyone! After some family time today I got out and welded the shock strut mount brackets to the ankles of the gear legs. I also got so excited I wanted to see it on the gear so I made up some oak sticks to keep the gear from spreading and flipped it over for a few...
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    Tig Setup you use

    So JohnS... Has any of this discussion helped?
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    Christavia renewal and build log!

    Got in and out of the shop early early today! welded up the rear gear legs! Gang cut and shaped the shock strut attach fittings! Fit up and located the fittings on the inboard side of the leg/axle assembly. And said to myself, "It's too effing hot, I'm going to take the Waverunner out...
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    Tig Setup you use

    Excellent Ekim!!!! The only thing I would say is that "pulse" actually toggles the amperage between your chosen welding amperage and a lower percentage of that amperage. Your chosen amperage being whatever your machine setting and your current foot or finger rheostat position is. Both the...
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    Tig Setup you use

    Thought about this a little more... The single biggest break through for me in the quality of my welds, came from a result of paying more attention to prep! Keep tungstens sharp. A science unto itself, grinding along the length so that any scratches run from the unground portion to the tip...
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    Christavia renewal and build log!

    A buddy asked, "how'd you cope those gear leg tubes? They look almost perfect." I assured him they were no where near perfect, but here's the process: https://youtu.be/EE5Q2mEOcYI
  10. Y

    DeltHawk Under New Ownership

    I remember visiting Deltahawk back when Doug was first tinkering with the engine on his Velocity. 1995 or 1996? Odd business this modern day engine development game must be. I remember he had all kinds of warning signs, reward posters and photos of some "corporate secret thief" all over the...
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    Tig Setup you use

    I just re-read your Original Post. For nothing but .035, I'd switch to 1/16" tungsten and 1/16th" filler rod. Try setting amps at about 60-65, but only use about 2/3 to 3/4 of full throttle. Not sure if you're using a foot pedal or rotary finger control? Once you get your puddle started...
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    Tig Setup you use

    Yep, Jody at welding tips and tricks dot com and his youtube presence. Don't bother with the egotist, "Mr. Tig", as most of his work is done off camera, poorer quality and likely not his anyhow. YouTube is a fantastic resource for REFINING your welding, but you either need some instruction or...
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    Christavia renewal and build log!

    I am way too cheap to buy a set of machinist's pre-ground precision angle blocks. Besides I know the same results can be achieved using math or a home made SineBar. I've just never taken the time to find some tool steel and build a nice one. I was just a little fuzzy on how to get the right...
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    Christavia renewal and build log!

    I finally was able to cope... I used a 1.125 inch side mill bit to hog out the thick tube. Nice, but not the best fit up and requires a lot of hand grinding. Too chicken to weld it yet knowing: 1) the angles are fairly critical given the application and 2) no time to fix it if I screwed it...
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    Christavia renewal and build log!

    Made up a few main gear legs... Now I am just contemplating and trying to cope... (get it?...pun? cope?) :ban:
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    Structural question

    Hey thanks for the reply; Maybe what I intended to convey is that I have a plan to keep everything aligned, but now I am switching to an all tube steel welded up structure. I will no longer have, what I had thought would be an "easy way" (shims) to adjust those things for the life of the...
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    Christavia renewal and build log!

    Here's a video of how the welding sequence went for the axle fabrication. I can hardly wait to roll this thing around on it's own wheels. https://youtu.be/IN0lO7N71b8
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    Christavia renewal and build log!

    Wife went to the store so I snuck out to the shop and milled flats on the brake mount plates so that I could weld them up! Came out nice!
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    Structural question

    That's great Pops; Thanks. I have a similar plan for keeping everything aligned. There is a 5 degree camber welded into Mason's design on each side which I will shim away from a similar datum. I'm past the point of concern about alignment. That wasn't really the concern anyhow. I was just...
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    Structural question

    Well of course the assumption is that I'd get it right or real close the first time and the need for adjustments would be fairly minimal and only result in slightly different tire wear over the life of the tires...
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