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Originally Posted by Henry_Mareck
have you measured / calculated you muzzle velocity yet?
looks to be about 10-12 m/s
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Very good estimate. How did you "see" that???
A couple design criteria where:
1. Design to a 13m/s wheel speed, as there will be losses.
2. Design based upon 1/2 max motor speed to accomodate any battery issues, allow for an extra pulse to get back up to speed after a shot, and so we can have some room in case point one above was not concervative enough.
Upon testing, we shot a ball 35' at 30 degrees (with no spin on the ball). Based on this, we're pretty confident that we're at 12m/s, as this was FIRST's indirect measure.
Since then, we've lessened the top drum speed to generate a back spin, giving us much better control at the same type of distance.
In order to get a final number, we'll be looking at a buying a speed gun (which I'll use with the baseball team I coach in the off-FIRST-season).