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Arrow length vs draw length

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DC:
How do you decide between these measurements when you're making a bow? When I'm just shooting for speed I've found that DL is king but when you shoot for distance then aerodynamics rears it's head and a shorter skinnier arrow would maybe trump some of the DL's advantage. Shorter arrow could mean a shorter bow which would return quicker would it not? It seems to me that there is a whole lot of interdependencies going on here. So, how do you choose?

willie:
good flight arrows seem to be in demand for record breaking so I would think the bow needs to be built around the preferred arrow.


the broadhead class being a bit different, as it standardize arrows to make the game more about the bows

DC:

--- Quote from: willie on September 11, 2020, 01:34:29 pm ---good flight arrows seem to be in demand for record breaking so I would think the bow needs to be built around the preferred arrow.

--- End quote ---

Granted, but you can have a very good arrow in 24" or 26" for example, but the 26" has those extra 2" of DL. Can that 2" less arrow length reduce the air resistance enough to negate the advantage of the 2" of DL?

willie:
it would be interesting to know what arrow lengths were used to consistently challenge and set the records in the class you are interested in. I don't know if the record book has the arrow specs, but certainly someone has an educated guess.

shorter arrows are stiffer for their diameter, and aerodynamic theory puts a lot of weight on the diameter factor in addition to less resistance overall for being shorter.

in addition to aerodynamic factors down range, the stiffness/spine is needed for minimizing fletching and having adequate early stabilization out of the bow.
at least, that is how I understand some of the factors.
which of the numerous requirements to make a winning shot is the one that needs the most attention in your set up might be difficult to determine without lots of testing.

DC:
Yes, I'm kind of assuming that it is mostly trial and error but I thought there might be some theories that may short cut it a bit.

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