Hey! I fixed my bike!

CaptStash · #1 08-03-2020, 07:14 PM

So...my Blue AC1 got tripped over when it was on my son's Kickr. Long and the short of it was a broken chainstay. All the quotes for a repair were around $500-$600, which is about what the frame is worth. In the meantime, I got smacked into by a commercial fishing boat in rowing shell, and had to get my carbon repair skills on anyway. After teh boat repairs came out well, I decided to have a go at the Blue.

I sanded it down pretty aggressively, then installed two layers of unidirectional carbon on each side of the chainstay, along with one layer on the top and bottom. I finished it with a signle layer of carbon weave. When it was done, the drive side stay was noticeably stiffer than the non-drive side, so I am pretty confident of the repair.

Not ready to hang out a shingle - but still pretty happy with this.

CaptStash....

muz · #2 08-03-2020, 07:19 PM

Very nice! How did you compact the carbon layers?

kmla320 · #3 08-03-2020, 07:21 PM

well done!!!!

CaptStash · #4 08-03-2020, 07:22 PM

Quote:

Originally Posted by muz

Very nice! How did you compact the carbon layers?

I didn't - and am not clear that it is necessary so long as the the carbon is fully wetted out with the epoxy. I squeegeed with my fingers (in gloves) and was pretty liberal with the goop. I did lots of sanding in between to ensure a smooth surface without voids to bond to.

CaptStash....

weisan · #5 08-03-2020, 07:25 PM

Again...don't let the Adjudicator catch you doing crazy $hit like these....

muz · #6 08-03-2020, 07:53 PM

Quote:

Originally Posted by CaptStash

I didn't - and am not clear that it is necessary so long as the the carbon is fully wetted out with the epoxy. I squeegeed with my fingers (in gloves) and was pretty liberal with the goop. I did lots of sanding in between to ensure a smooth surface without voids to bond to.

Interesting. At least in theory, there is extra resin that adds weight but not much strength.

And how did you finish? When I apply the final weave, the edge doesn't blend in very well. Did you sand and clearcoat afterwards?

CaptStash · #7 08-03-2020, 08:22 PM

Quote:

Originally Posted by muz

Interesting. At least in theory, there is extra resin that adds weight but not much strength.

And how did you finish? When I apply the final weave, the edge doesn't blend in very well. Did you sand and clearcoat afterwards?

I made sure to make the edges of the carbon well overshoot the repair, then sanded and feathered followed by a clear coat of resin. Finally wet sanded with 220 & 600 and polishing compound. Smooth as a baby’s bottom.

Sent from my iPhone using Tapatalk

charliedid · #8 08-03-2020, 08:45 PM

That's impressive. How did you determine the drive side stay to be stiffer? Just manually flexing the stays?

I hope the boat turned out well.

CaptStash · #9 08-03-2020, 09:31 PM

Quote:

Originally Posted by charliedid

That's impressive. How did you determine the drive side stay to be stiffer? Just manually flexing the stays?

I hope the boat turned out well.

Yes just manually flexing the chain stays.

Boat turned out quite well - that's what gave nme the confidence to attempt the bike repair (that and lots of fun on YouTube). The first generation Hudson singles have an inherent design flaw, so I I'll be doing the same repair on it on the other side this winter, then spray out the whole thing. It's a very old carbon boat, so it takes a bit of care and feeding. Still fast and stiff, so I'm good with it.

CaptStash....

OtayBW · #10 08-04-2020, 07:58 AM

Quote:

Originally Posted by weisan

Again...don't let the Adjudicator catch you doing crazy $hit like these....

This got me to thinking:

Quote:

Adjudicator - a person who impartially decides or resolves a dispute or controversy.

That doesn't sound like it's always such a bad thing...

Joel · #11 08-04-2020, 12:59 PM

Very impresssive!

weisan · #12 08-04-2020, 01:06 PM

Quote:

Originally Posted by OtayBW

This got me to thinking:That doesn't sound like it's always such a bad thing...

And I am thinking you probably don't want to mess with her...

OtayBW · #13 08-04-2020, 01:13 PM

Quote:

Originally Posted by weisan

And I am thinking you probably don't want to mess with her...

Not sure I follow. Is she kin to you?

bicycletricycle · #14 08-04-2020, 02:56 PM

Quote:

Originally Posted by OtayBW

Not sure I follow. Is she kin to you?

from a movie, john wick 3?

slambers3 · #15 08-04-2020, 03:44 PM

Quote:

Originally Posted by CaptStash

Yes just manually flexing the chain stays.

Boat turned out quite well - that's what gave nme the confidence to attempt the bike repair (that and lots of fun on YouTube). The first generation Hudson singles have an inherent design flaw, so I I'll be doing the same repair on it on the other side this winter, then spray out the whole thing. It's a very old carbon boat, so it takes a bit of care and feeding. Still fast and stiff, so I'm good with it.

CaptStash....

Post pix of the boat! I need to pick up a single again, sold my empacher a few years back