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Engine basics => Engine set up tips => Topic started by: Tim Wescott on April 24, 2012, 03:21:40 PM

Title: OS 20FP manual?
Post by: Tim Wescott on April 24, 2012, 03:21:40 PM
Are there any of these scanned in out there?  I seem to know how to run the engine -- I just like to have the manufacturer's take on things...
Title: Re: OS 20FP manual?
Post by: Mark Scarborough on April 24, 2012, 04:07:26 PM
Tim, I believe that on OS website, there is a link for archives with PDF files of the manuals,, have you tried there?
Title: Re: OS 20FP manual?
Post by: Bill Little on April 24, 2012, 04:18:50 PM
HI Tim,

The OS manual has no mention of the Brett Buck Tune Up in it.  ;D

BIG Bear
RNMM/AMM
Title: Re: OS 20FP manual?
Post by: Mark Scarborough on April 24, 2012, 04:20:25 PM
Or maybe cause I am SUCH a great guy, I will do the google for you,, and guess what,, on RCG I found this,,
Title: Re: OS 20FP manual?
Post by: Mark Scarborough on April 24, 2012, 04:21:01 PM
Or maybe cause I am SUCH a great guy, I will do the google for you,, and guess what,, on RCG I found this,, part two,,,
Title: Re: OS 20FP manual?
Post by: Mark Scarborough on April 24, 2012, 04:21:36 PM
HI Tim,

The OS manual has no mention of the Brett Buck Tune Up in it.  ;D

BIG Bear
RNMM/AMM

Muah ha ha ha,,, well played Bill, well played H^^
Title: Re: OS 20FP manual?
Post by: Tim Wescott on April 24, 2012, 04:34:10 PM
Thank you Mark.  I looked on the OS website, and then Googled, but did not find: you possess superior Google-Fu than do I today.

Bill:  ;)

Interesting fuel mix they recommend: 25% castor and no nitro, or 20% castor, 10% nitro.  No mention of synthetics at all.
Title: Re: OS 20FP manual?
Post by: Geoff Goodworth on April 24, 2012, 06:02:55 PM
Also, that is the manual for the steel liner FPs.

The manual for the ABN FPs specifies 75% methanol, 20% castor oil and 5% nitro or 65% methanol, 20% oil and 15% nitro.

Again, no mention of synthetic oil.

The LA manual recommends the same fuels as the ABN FPs.
Title: Re: OS 20FP manual?
Post by: Bill Little on April 24, 2012, 06:27:13 PM
I now use the castor only fuel in old worn out engines that would loose too much compression if synthetic oil was used.  Sig Champion ( 1/2 and 1/2 oil) w/4 oz. of castor added per gallon for the old iron piston bushing crank engines like the Fox .35.

BIG Bear
RNMM/AMM
Title: Re: OS 20FP manual?
Post by: Brett Buck on April 27, 2012, 10:28:58 AM
HI Tim,

The OS manual has no mention of the Brett Buck Tune Up in it.  

   Yes, as a matter of fact, it does! It says to take it out of the box, assemble it, and bolt it to the airplane. Nowhere in there does it mention a Dremel tool with a grinding point, nor does it discuss blocking the boost port, putting in a smaller venturi, adding head gaskets, running 11-5.5 props at 8500 rpm in a 4-stroke, throwing away the muffler, etc. It also recommends a 9-4 prop for break-in, and for "sport flying".  It's almost as if OS actually knew how to build a good engine BEFORE they consulted with "stunt experts".

    Brett
Title: Re: OS 20FP manual?
Post by: Tim Wescott on April 27, 2012, 11:02:15 AM
It's almost as if OS actually knew how to build a good engine BEFORE they consulted with "stunt experts".

How odd.  That an engine manufacturer should know their job.
Title: Re: OS 20FP manual?
Post by: Randy Cuberly on June 19, 2012, 04:16:17 PM
How odd.  That an engine manufacturer should know their job.

They probably consulted with Brett before finalizing the design!   #^

Randy Cuberly
Title: Re: OS 20FP manual?
Post by: Howard Rush on June 19, 2012, 05:10:00 PM
They came pretty close with the VF, too.
Title: Re: OS 20FP manual?
Post by: Randy Cuberly on June 19, 2012, 11:28:09 PM
They came pretty close with the VF, too.

Yeah...I'll bet they were as surprised as we were about that one!!!   y1

Randy C.