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Engine basics => Engine set up tips => Topic started by: James Strickland on September 02, 2012, 11:57:36 PM

Title: Hey Randy S-OS.25VF
Post by: James Strickland on September 02, 2012, 11:57:36 PM

Randy or anyone who knows,
What is the weight of an OS.25VF & its timing for a pipe when set up for stunt?
Thanks, James

Title: Re: Hey Randy S-OS.25VF
Post by: Bill Little on September 03, 2012, 04:20:50 PM

HI James,

I have one, but I cannot tell you the weight, I don't remember..........  :'( 

It's on my "bucket list" to use on an Ares size model.  I have a .32 pipe for it, but I will have to call Randy and ask him the pipe length to start with.

BIG Bear
RNMM/AMM

Title: Re: Hey Randy S-OS.25VF
Post by: Paul Allen on September 04, 2012, 12:59:57 AM

James
         I have run the VF in an Oriental, weight is 8 oz's with a Mac's header, RPM 10,700, pipe length 17.5"
fuel- 10% nitro, 10% Klotz, 10% Castor, it uses 95cc , on 61ft 0.015" lines E to E. Prop 10x4 APC.
Engine timing as near as I can measure - Exhaust 150 degree's ( total), Inlet 120 degree's ( total) , Crankshaft 193 degree's.
Randy pipe.
Paul
In OZ

Title: Re: Hey Randy S-OS.25VF
Post by: Trostle on September 04, 2012, 01:42:18 AM

I have an OS .25 VF modified by Randy.  His venturi, ST needle.  I just weighed it at 7.5 oz.  His tuned pipe is 1.4 oz.  I did not weigh a header.  Timing by Randy.

Keith