What about these tracks in fiberglass?

[onetone]

This fiberglass is on the compression side of an extreme reflex bow. Have shot a couple thousand arrows thru the bow. I have not seen these kind of striations in belly glass before and I'm looking for opinions on this situation. Does this signal eventual failure? There are no cracks or fractures that I can feel with a fingernail.

[kennym]

I've never seen anything like that.  Almost looks like the resin popped out of the glass strands.

Both limbs look same?

[Mad Max]

Is it smooth?

[Longcruise]

Couldi  it be in the finish?

[onetone]

Is it smooth?


Yes it is smooth. I don't feel any variation in the surface when I draw a fingernail across it.

[onetone]

I've never seen anything like that.  Almost looks like the resin popped out of the glass strands.

Both limbs look same?

Yes both limbs look the same.

[Jeff Freeman]

Looks like glass that is sanded both sides

[onetone]

It's Gordon's glass sanded one side only - the glued side.

[Jeff Freeman]

It is black glass not clear over dark wood?

[onetone]

Jeff, yes it is black glass ... or was!

[Jeff Freeman]

🤔

[Jeff Freeman]

Have you sanded  it down and cleared it yet?

[onetone]

Jeff - sorry I don't understand your question. Please explain

[Jeff Freeman]

Never mind if it's showing that before it's sanded and cleared. It'll still show it after it's been sanded and cleared.

[Mad Max]

Is it like that all the way out, levers and riser?

[Jeff Freeman]

Mad Max. I was just thinking the same thing as it's showing it all the way out or just in the main big hard bending areas?

[onetone]

Mark and Jeff - the effect is concentrated in the area of maximum compression. Runs an 1 1/4" past the end of the fade toward the riser and about 6 1/2" from the end of fade toward the limb tips (both limbs the same). Doesn't look so extreme in the pic below when seen in scale and not so close up. Other pic shows the light reflected off the surface of the affected area. As you can see there are no stress caused cracks or imperfections visible on the surface of the glass.

[Jeff Freeman]

You may have pushed it to the limit.bmaybe try carbon.  You are definitely trying to get to Boldly Go. A star trek saying. Lots of opposite direction bending 😲 JF

[Mad Max]

It could be just the finish, what did you use?

[onetone]

Shellac sealer and multiple coats of TruOil. I don't think it is the finish but I have been wrong a couple of times. Just seems deeper to me.