[NSRCA-discussion] APC PROPS FOR OS 140 RX

[rcmaster199 at aol.com]

I've used the 18x10 sport prop that Ron talks about. Still have it I think. I used it on a 27% Xtra 300 10 years ago at least. I don't think I liked it much from thrust generation POV and it was very heavy.

Frank stick with the 18.1x10. If you need a little more speed, try a standard blade 17x12. Stay away from wide blades...they don't help much in generating thrust. If I can find the 18x10, I'll bring it to the field today so you can try it. 

Matt






-----Original Message-----
From: ronlock at comcast.net
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Sat, Mar 20, 2010 7:36 am
Subject: Re: [NSRCA-discussion] APC PROPS FOR OS 140 RX


You might try an 18x10 , the one with very wide blade at hub, tapering to point at end.  Will likely require a significant spinner cone trim.  That prop was next best to the 3b 10p for me.
Ron Lockhart

----- Original Message -----
From: "Ed Alt" <ed_alt at hotmail.com>
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Sent: Saturday, March 20, 2010 7:24:42 AM (GMT-0500) Auto-Detected
Subject: Re: [NSRCA-discussion] APC PROPS FOR OS 140 RX


Frank:
Don't go less than 10 pitch, you just won't have enough speed without developing a lot of RPMs and a lot of noise to go with it.

Ed




From: frank 
Sent: Saturday, March 20, 2010 7:10 AM
To: 'General pattern discussion' 
Subject: [NSRCA-discussion] APC PROPS FOR OS 140 RX




Been running an APC 3- blade (15-10) re-pitched by Dave Lockhart on my Brio for quite some time until yesterday when  I nicked a tip on landing. I  have  also used an 18.1 x 10 with pretty good results. I noticed that APC also has an 18x 8 W IMAC prop and a 18x 6W 3D prop. I assume the later would be less desirable, but who knows until it’s tried. Has anyone used either and on what motor ?
 
Thanks,
Frank


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