I agree, I'm an aircraft mechanic and tap testing is for checking delamination of a composite surface. In particular flight controls. That's it! It was never intended to check for cracks and there's inspections specially for cracks and that's always been X-ray inspections.
Could you not tap the same spot on the opposite side and hear for differences in sound? For instance, if you tap the same spot on each fork leg, whose structure is the same.
I feel like this advice works for a fork. I do understand that its unreliable do to your hearing quality. However, I didn't see the test on a bike frame. We dont have access to a expensive testing tools. So what do we do to test used carbon bikes?
Good question. Tap testing is a waste of time because it is not definitive. You need to be sure either way otherwise there is no confidence in the result. The best way to test for ‘hidden’ issues at home is to compress with your thumbs across the tube. Listen for noise and feel for unusual give in the tube. If you have a duplicate of the part in question then reference that. Look for paint cracks but that too does not necessarily mean there is a fracture in the carbon wall. Best of all if you are unsure, get it to a reputable carbon inspector. Be careful..there are many waving ultrasound and aerospace talk. Avoid. Look for reviews and experience to assist.
@@mreese8764 That’s not what he is saying..There are cases where some visible anomalies or traumas are showing inconsistent or inconclusive results depending where the issue is. There is no magic wand. What would you do as an inspector? It must be then be investigated by paint removal and then material removal if necessary. If it is not conclusive with the tests Rob mentioned then it cannot be ignored. Today we use scanning software which is more helpful but even so we would still remove material if we had any doubt. Hope that answers your question?
Excellent and informative video! Would you be skeptical of a popular online used bike retailer's claim of them "checking the frame with an aviation grade electronic carbon tap" ensuring no structural damage?
Nonsense. Aircraft testing equipment is nothing like a bicycle testing equipment. The word ‘aerospace’ is used a lot too. You don’t go to veterinary surgeon for your medical procedures..thanks you chiming in.
experts talking, i like that.
Keep up the good Work.
Greets
I agree, I'm an aircraft mechanic and tap testing is for checking delamination of a composite surface. In particular flight controls. That's it! It was never intended to check for cracks and there's inspections specially for cracks and that's always been X-ray inspections.
Could you not tap the same spot on the opposite side and hear for differences in sound? For instance, if you tap the same spot on each fork leg, whose structure is the same.
I feel like this advice works for a fork. I do understand that its unreliable do to your hearing quality. However, I didn't see the test on a bike frame. We dont have access to a expensive testing tools. So what do we do to test used carbon bikes?
Good question. Tap testing is a waste of time because it is not definitive. You need to be sure either way otherwise there is no confidence in the result. The best way to test for ‘hidden’ issues at home is to compress with your thumbs across the tube. Listen for noise and feel for unusual give in the tube. If you have a duplicate of the part in question then reference that. Look for paint cracks but that too does not necessarily mean there is a fracture in the carbon wall. Best of all if you are unsure, get it to a reputable carbon inspector. Be careful..there are many waving ultrasound and aerospace talk. Avoid. Look for reviews and experience to assist.
6:38 If you can't detect it you consider it a fracture?!
@@mreese8764 That’s not what he is saying..There are cases where some visible anomalies or traumas are showing inconsistent or inconclusive results depending where the issue is. There is no magic wand. What would you do as an inspector?
It must be then be investigated by paint removal and then material removal if necessary.
If it is not conclusive with the tests Rob mentioned then it cannot be ignored. Today we use scanning software which is more helpful but even so we would still remove material if we had any doubt.
Hope that answers your question?
@@carbonbikerepair1 Yes. Than you!
Excellent and informative video! Would you be skeptical of a popular online used bike retailer's claim of them "checking the frame with an aviation grade electronic carbon tap" ensuring no structural damage?
Nonsense. Aircraft testing equipment is nothing like a bicycle testing equipment. The word ‘aerospace’ is used a lot too. You don’t go to veterinary surgeon for your medical procedures..thanks you chiming in.