Progress Update

A forum about all aspects of the construction and maintenance of the Billy Dawson inspired modified Hatz Classic biplane. Here is the place to ask your questions and get the answers from the real experts.

Re: Progress Update

Postby orchardair » Thu Jul 20, 2017 10:55 am

I'm not sure what stage # I'm in, but I just wanted to add the comment that welding the 0.050 doubler to the 0.090 tube was of course different than to the 0.065 tube.
Do people have any tricks to perfectly align the holes and slots in the two tubes that form the landing gear suspension?

I am talking about the highlighted areas:

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Last edited by orchardair on Fri Jul 21, 2017 6:38 pm, edited 1 time in total.
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Re: Progress Update

Postby Bitshifter » Thu Jul 20, 2017 11:59 am

I had access to an end-mill so that is how I did mine.
Ed White
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Re: Progress Update

Postby orchardair » Mon Jul 24, 2017 11:31 am

I was almost tempted to invest in an end-mill, and I am sure having access to one is awesome!

Instead I used my drill press, a die-grinder and a file, and a couple of jigs (simple ply wood piece to align the tube perpendicular to the drill press).

Sometimes there is something ridiculously satisfying in making a simple slot in a piece of metal. Especially if you only used hand tools?

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Re: Progress Update

Postby Bitshifter » Mon Jul 24, 2017 3:31 pm

Very nice, especially for using a drill and file. I would never be able to get that close with my drill press.
I thought I was the only one working in flip flops, teaches you to be quick on your feet. :)
Looks good.
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Re: Progress Update

Postby orchardair » Mon Aug 14, 2017 12:48 am

Bending 0.125" sheet takes quite a bit of heat (glad I got the #3 tip from the tin man for my Meco), and something to bend against.
The gear leg fitting needs to have an internal opening of 1.125". While a square tube of 1" size is easy to find, a 1.125" one is not.
So for the second bend I just added some 0.125" material, and heated away...
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Then it's a combination of the die grinder, bench grinder grinding wheel and finally belt sander.
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Final result:
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Re: Progress Update

Postby HC85 » Thu Aug 17, 2017 8:10 am

Looking great ! Keep'em coming! Your photos have helped a ton on my build, thanks for posting!

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