The Frame Building Fail Thread

That’s a classic story! Those should’ve been the Team bikes… :rofl:

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I have to admit that I have had occasion to call up King Cage to bail me out a few times as well.

-Walt

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Most recent failure, I had the inner air bladder fail during the cure, so the plies lost compaction. I cut it all apart to diagnose the problem and sort out solutions.

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That 42g weight savings made you way, way faster before it cracked though. Think of all the trophies and prize money you’d have missed out on!

-Walt

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The real moral of the story is verify every tube. I have found plenty of tubes with defects including butted sections much shorter than advertised. I check every tube as I pull them to build.

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Just had a nearly big time fail today. I noticed that my acetylene tank was nearly half empty despite having barely used it. Turns out there was a leak in the adapter to the regulator. Glad I caught it before something exploded!

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The beauty of a raw frame, the frame looks just as it was new!

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@liberationfab I’m about to set up an acetylene tank with an adapter for the regulator so I’m super interested in this. When you first set everything up did you do a leak test (pressure or bubble style)? Was the leak due to bad threads on the adapter or contaminated threads on the cylinder? Or was everything just not tight enough? Thanks for sharing!

I didn’t do a leak test at first which was pretty dumb in hindsight! I was using a CGA-300 to CGA-510 adapter and it turns out my regulator was bottoming out on the adapter and not the actual canister. I fixed it by tightening the adapter on the canister and making sure the regulator wasn’t bottoming out prematurely. Confirmed with the scientific soapy bubble test.

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Thanks, that is good to know! I’ll be sure to connect the adapter to the cylinder first to avoid the same issue.

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oh my, that is kinda cool in way :scream: :woozy_face:

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2 posts were merged into an existing topic: Frame Verification and Alignment Surface

Dozens. I welded the HT in my hardtail crooked. Fully welded it. Cut it out, straightened it and lost 1.5* of hta. My custom hardtail has an angle set in it :laughing: I also welded the nds chain stay in crooked. I’m sure there’s more on that bike.

Bought all the parts and started fabbing a vpp style full sus only to scrap that whole design and start over. I’ve actually lost count on how many times I had to rebuild stuff on this current bike but I think I did the seat tube twice, linkage twice, main pivot twice, shock pivot three times, I had to chop out great sections of the chain stays for tire clearance, then plate them back in, then I threw that whole rear triangle away and built it all over again.

It’s been emotional.

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Nailed it!

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Saves weight and improves compliance!

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I love the short section of Columbus Air tubing in the top tube :wink:

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Dang, I cut it twice and it’s still too short!

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