Speed testing pyramid trapped oak 77#

[joachimM]

In another thread i promised to speed test a 70" edge-ringed trapped back red oak bow that draws 77# @29" and weighs currently 582 g. I tested it at 500 gn and 650 gn (my heaviest arrow).
I'm rather pleased with the result, though i should have used a decent string instead of the polypropylene string i typically use for tillering (cos it broke on my sixth shot). Even though such long bows aren't known for high dry fire speed, i got 180.4 and 196.3 fps at 500 gn and 175.4, 178.2 and 180.7 fps at 650 gn.

[Chief RID]

Wow! That seems really fast to me. It will be interesting to see how many shots it has in it. I hope you give us a look. What is trapped? I have seen this term and kinda think it has something to do with crown, or decrowning the back. You must have efficiently removed non-working wood while stressing the working wood to the max. Very good!

[Badger]

  The bow seems to be performing pretty well, the readings are jumping around a little bit. The 650 grain arrow reading would be roughly 10 fps faster than if you were shooting 10 grains per pound. So that puts you at or near about 170 fps. You get an A

[joachimM]

Thanks for the expert opinion .
My form and release technique definitely requires improvement

[bradsmith2010]

thanks for Posting your results,, shooting through the chrono is great practice for your release

[JW_Halverson]

thanks for Posting your results,, shooting through the chrono is great practice for your release

It certainly exposes, without bias, inconsistencies in your release!