More Power From .91 Two Stroke  
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More Power From .91 Two Stroke - 9/21/2008 7:06:07 PM   
Treacle


 

Posts: 37
Joined: 10/30/2006
From: Cambridge, UNITED KINGDOM
Status: offline 		Hi

I have recently bought a brand new JEN .91 two stoke engine. It has been well run in and has been powering my Hanger 9 Pulse XT 60 for about a dozen flights. The power is ok but I think it could do with a tad more. The propeller I am using currently is a 14X6, what propeller do you think I should use to get the maximum power out of the engine?

Thanks
       Post #: 1

RE: More Power From .91 Two Stroke - 9/21/2008 7:11:47 PM   
Oly


 

Posts: 190
Joined: 7/23/2003
From: Missoula, MT, USA
Status: offline 		For comparison, I have an OS 91 FX two stroke. It turns 10,500 comfortably rich using a 14x6 APC prop.

Cheers,
Oly

(in reply to Treacle)
       Post #: 2

RE: More Power From .91 Two Stroke - 9/21/2008 7:49:37 PM   
aerowoof


 

Posts: 1948
Joined: 6/11/2006
From: pembroke, NH, USA
Status: offline 		depends what you want the plane to do.speed is high pitch smaller diameter,vertical performance or thrust is larger diameter lower pitch

(in reply to Oly)
       Post #: 3

RE: More Power From .91 Two Stroke - 9/21/2008 8:01:03 PM   
Treacle


 

Posts: 37
Joined: 10/30/2006
From: Cambridge, UNITED KINGDOM
Status: offline
quote:

ORIGINAL: aerowoof

depends what you want the plane to do.speed is high pitch smaller diameter,vertical performance or thrust is larger diameter lower pitch


I would like a bit more vertical performance or thrust. What would you recommend?

(in reply to aerowoof)
       Post #: 4

RE: More Power From .91 Two Stroke - 9/21/2008 8:22:04 PM   
aerowoof


 

Posts: 1948
Joined: 6/11/2006
From: pembroke, NH, USA
Status: offline 		something like a 15-5 but not even sure they are made so either a 16-4

(in reply to Treacle)
       Post #: 5

RE: More Power From .91 Two Stroke - 9/25/2008 2:02:48 AM   
Jim Dines


 

Posts: 1418
Joined: 2/27/2002
From: Keller, TX, USA
Status: offline 		My Magnum 91 XLS on a Seagull Edge 540 happily turns an APC 15X6. I get around 9300 rpm on 5% Omega.

(in reply to Treacle)
       Post #: 6

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