RCU Forums - View Single Post - Best engine for a Patriot XL?
View Single Post
Old 09-05-2009, 09:09 AM
  #6  
freakingfast
Senior Member
My Feedback: (3)
 
Join Date: Jan 2005
Location: Mather, CA
Posts: 2,222
Likes: 0
Received 0 Likes on 0 Posts
Default RE: Best engine for a Patriot XL?

The OS 91 FX on a Macs 11cc muffled marine pipe (#1369) will turn a APC 11X 12 at 12,750 and the 11X14 at 11,700 on 15% and a few hundred less rpm on FAI fuel. APC does not list the 11X14 anymore, but you may have to hunt around or call them. Their new website list is not as complete as before.

With the rpms listed above, here are the pitch speed and thrust numbers: 11X12 = 145mph & 11.27 lbs. 11X14 = 155mph & 10.48 lbs.

Just for giggles; OS 91 heli & tuned pipe 11X12 @ 15000 pitch speed 170mph & 15.6 lbs. You would need a huge fuel tank for that one..chuga-lug, chuga-lug!

Serpent's Webra .90P5 12X12 @ 11500 = pitch speed 131mph & 12.3lbs. This engine would be cool with a 11X14. Potentially, a stronger engine than the OS.