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Fresh bow

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DC:
I was always under the impression that the first shot would be the fastest/furthest. You know fresh, stiff. I was just messing with the shooting machine I noticed that the first shot was 8-10 fps slower than subsequent shots. If it leave the bow braced and clamped to the machine for even 5 minutes again the first shot will be that 8-10 slower. I haven't shot more than 5 in a row but it would be one slow and four fast(ish). Does this sound right? Maybe the hysteresis is higher on the first shot. I'm not sure if it's just this bow or I've just never noticed before.

mmattockx:

--- Quote from: DC on September 28, 2020, 05:51:35 pm ---Maybe the hysteresis is higher on the first shot.
--- End quote ---

In TBBv1 Tim Baker (I think it is) talks about this and says that bows perform better after they are warmed up with a few draws before shooting. I don't remember who did it, but Tim talked about a study that showed wood had very high hysteresis and said the only way he could get results that repeated the study was to measure the bows cold with no warm up pulls. He said that if the test was done twice in a row the second run would show a huge reduction in hysteresis.


Mark

DC:
This was just first shot slow and then the rest were good.

mmattockx:
Sounds like the same effect as what Tim was describing.


Mark

Tuomo:
Very interesting! Maybe it has something to do with visco-elasticity properties of wood? This might be important for example in flight shooting - warm up is important for the bow and the shooter! Please, keep going testing.

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