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Os 40la - 8/13/2003 9:48 PM   
Casey Frost



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From: Roseville, CA, USA
Status: offline 		15% Wildcat
12x6 APC prop <---(Typo is actually 10x6)
apx 250ft above sea level
stock muffler with rubber deflector pipe
apx 30-40 flights

11,400 RPM run at 11K

Runs about 200 - 400 RPM slower with a Master airscrew. 5% Nitro cuts RPM down to the low 10's and runs high 9's (Sounds like quarter mile times.)

< Message edited by Casey Frost -- Aug 21 2003 7:24PM >


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Os 40la - 8/16/2003 3:46 AM   
EagleOne



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From: Curitiba, PR, BRAZIL
Status: offline 		Anyone know the RPM of .46 LA with an 11x6 MA prop??


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Os 40la - 8/21/2003 8:30 PM   
Natrajk


 

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From:
Status: offline 		Are you sure this is correct?
My OS .50sx turns the APC 12X6 at 10500 when tuned for flight.
Probably a couple of hundred more max. (10%nitro)

I have also read that the Irvine .53 turns the same prop at 10700.

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Os 40la - 8/22/2003 1:19 AM   
Vincent VO


 

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From: Rotselaar, BELGIUM
Status: offline 		I flew an OS46La today with a 12x6 at 9900 rpm. Could be better, but the last time i adjusted the carburater is 2 month's ago.

Vincent

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Os 40la - 8/22/2003 3:21 AM   
Casey Frost



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From: Roseville, CA, USA
Status: offline 		Sorry guys, typo. my props are 10x6 not 12x6 as earlier stated.


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RE: Os 40la - 7/17/2009 9:27 AM   
faulknej



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quote:

ORIGINAL: EagleOne

Anyone know the RPM of .46 LA with an 11x6 MA prop??



I got 9800 with an APC 11x6, 10% Cool Power, 70F, 65% RH.  That was the 2 tanks on the break-in runs though.  Got about 10400 leaned out to almost max.  Too much prop for it.  I haven't run it with the 10X5 APC or the 10X6 MA's I'll fly it with.  I didn't have them at the time

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RE: Os 40la - 1/7/2010 10:00 PM   
Steve108



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From: Derry, NH, USA
Status: offline 		OS 40 LA
MAS 10x6
Morgan Fuel Omega 15%
17% oil 30/70 castor/synthetic
OS 8 plug
38 deg F, dew point 18 deg F, density altitude approx 750' below sea level
Stock muffler, no baffle, long (~3') rubber hose extension (to keep the neighbors happy)
Mildly ported sleeve

12,900rpm tuned for flight (3 clicks rich, probably -300 rpm)

I'll try to post the numbers with no extension and peaked when I get a chance.

< Message edited by Steve108 -- 1/8/2010 3:09 AM >

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RE: Os 40la - 1/10/2010 3:49 AM   
w8ye



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RE: Os 40la - 1/28/2010 5:52 PM   
Mr67Stang



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quote:

ORIGINAL: Steve108

OS 40 LA
MAS 10x6
Morgan Fuel Omega 15%
17% oil 30/70 castor/synthetic
OS 8 plug
38 deg F, dew point 18 deg F, density altitude approx 750' below sea level
Stock muffler, no baffle, long (~3') rubber hose extension (to keep the neighbors happy)
Mildly ported sleeve

12,900rpm tuned for flight (3 clicks rich, probably -300 rpm)

I'll try to post the numbers with no extension and peaked when I get a chance.


750 ft BELOW sea level??? Atlantis???

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RE: Os 40la - 1/29/2010 4:44 AM   
jimmyjames213



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From: L, USA
Status: offline 		40 fp 0% nitro 16% castor turning a 12x4 10500ish rpm

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RE: Os 40la - 2/3/2010 1:48 AM   
Cogburn



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From: Aurora, SD, USA
Status: offline 		OS 40FP

APC 12.25x3.75 @ 10400 peaked.

APC 10x6 12000 peaked.

Byron's 10% fuel. 30°F or so barometer 30.12".

This engine may be slightly modified. I received it 3rd hand and runs better than any other FP I have run. It is an old iron sleeve engine. I just ran it on the stand to see if it was strong enough to go on my Modeltech Magic Extra 300l and then found this thread...I guess I am going to give it a try. The K&B 61 Twister I was going to use won't fit in the Magic Extra fuselage.

< Message edited by Cogburn -- 2/3/2010 2:13 AM >

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