View Single Post
  #23   Spotlight this post!  
Unread 29-01-2015, 12:07
nuclearnerd's Avatar
nuclearnerd nuclearnerd is offline
Speaking for myself, not my team
AKA: Brendan Simons
FRC #5406 (Celt-X)
Team Role: Engineer
 
Join Date: Jan 2014
Rookie Year: 2014
Location: Hamilton, Ontario, Canada
Posts: 446
nuclearnerd has a brilliant futurenuclearnerd has a brilliant futurenuclearnerd has a brilliant futurenuclearnerd has a brilliant futurenuclearnerd has a brilliant futurenuclearnerd has a brilliant futurenuclearnerd has a brilliant futurenuclearnerd has a brilliant futurenuclearnerd has a brilliant futurenuclearnerd has a brilliant futurenuclearnerd has a brilliant future
Re: Help Calculating time to recharge air tanks

Quote:
Originally Posted by Mike Bortfeldt View Post
I think the error you are making is that the CFM compressor performance values you are using are at the inlet to the compressor, not the discharge. The compressor does not put out 0.53 cfm @ 60 psi, it compresses 0.53 cfm of atmospheric air (14 psia) when the discharge is @60 psi.
Oh crap, so it's SCFM then, not cfm? Ugh, that changes things significantly. Now I get closer to 13 seconds to recharge one tank from 60 to 120 psi. I'll compare that with the robot performance tonight, but it sounds more like what we were seeing. I wish that were clearer on the compressor spec.

- that moment when you realize you need to make a big change, and it's almost week 5