RCU Forums - View Single Post - Scratch building a Goldberg Ultimate bipe
Old 09-04-2025 | 09:13 AM
  #27  
hannah76
 
Joined: Jul 2007
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From: , NC
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Originally Posted by Outrider6
Well, it turned out to be yet another nightmare that I caused. Despite my checking of the balance during framing, and it seemingly being ok, it ended up where it would have taken 7 oz of lead on the firewall to get it to balance at the rear CG limit. The worst part was that to get down to a mere 7 oz, I lightened the tail as much as possible without surgery. I can't force myself to add lead to an airplane, and I didn't want to buy a heavier engine (either a 1.25 or 1.5 glow, or a small gasser). I was sick of dealing with it, so I sold it for way, way less than the $700+ of materials I had in it. I sold the Saito separately. Over $400 for just the wood for this plane.

It was an epic failure, and my fault. Lesson learned (I think). But at 9 lb, 4 oz, it would have flown extremely well on that Saito 100, if it had balanced.

But if you build it out of lite-ply like the original, then it would balance just fine. It was quite fun and very challenging to build from just the plans.
Ugh...sorry to hear after so much invested. Yours was a great looking plane!!!

I've read and seen the mounting of the center cabane to the fuse sides with the nylon bolts. DId you use the thin wire per the plans on the upper wing, or mount in a different fashion? Didn't see the wire in your framed pic....

I had a couple of these back in the 90's ... I've got the bug to build something, and I already have most of the wood. We'll see...