[NSRCA-discussion] APC PROPS FOR OS 140 RX

[Vicente "Vince" Bortone]

I have one 3 blade re-pithched.  Do you want to go back to 3b?  That is the best for that engine. 

Vicente "Vince" Bortone 

----- Original Message ----- 
From: rcmaster199@ aol .com 
To: nsrca -discussion at lists. nsrca .org 
Sent: Saturday, March 20, 2010 9:11:08 AM GMT -06:00 US/Canada Central 
Subject: Re: [NSRCA-discussion] APC PROPS FOR OS 140 RX 


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 @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 @ 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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