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General control line discussion => Open Forum => Topic started by: Bruce Shipp on March 18, 2006, 04:17:27 PM

Title: Cox 1/2 A RPMs?
Post by: Bruce Shipp on March 18, 2006, 04:17:27 PM

My son just finished a brushless outrunner electric motor kit and we tached it with a 5.5 x 4 cox prop at 13.5K rpm.  It has been ages since I had a tach on a Black Widow or Golden Bee.  What rpms would one of these Cox motors turn a 5.5x 4?  Thanks.

Bruce

Title: Re: Cox 1/2 A RPMs?
Post by: minnesotamodeler on March 20, 2006, 11:07:56 AM

I don't have or use a tach, but I'm guessing 16,000-17,000 anyhow. Could be wrong.  Where are the experts? 

--Ray

Title: Re: Cox 1/2 A RPMs?
Post by: john e. holliday on March 20, 2006, 05:05:40 PM

Pretty close.  That is what we aim for in Mouse 1 with stock Black Widows.   ---DOC Holliday