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General control line discussion => Open Forum => Topic started by: andy borgogna on March 19, 2016, 10:44:56 PM

Title: Anybody know where I can get a venturi for a O.S. .25FSR?
Post by: andy borgogna on March 19, 2016, 10:44:56 PM

I need a control line venturi for an O.S. 25 FSR, any help would be greatly appreciated.
Andy

Title: Re: Anybody know where I can get a venturi for a O.S. .25FSR?
Post by: Dan Berry on March 19, 2016, 11:20:31 PM

I would ask at RSM if the LA25 venture would work.

Title: Re: Anybody know where I can get a venturi for a O.S. .25FSR?
Post by: John Craig on March 20, 2016, 04:40:16 AM

http://stunthanger.com/smf/lee-machine-shop/great-news!-website-now-open!/

This is where I get mine. I have FSRs with 2 different size throats in the crankcase for the venturi.  I  have used the LA-25 venturi but I adjust the case to get the 20-25 needle valve to center. 10-4 APC cut to 9.5=4

Title: Re: Anybody know where I can get a venturi for a O.S. .25FSR?
Post by: Akihiro Danjo on March 20, 2016, 10:18:03 AM

OS venturi 20-25 FP-S, stock # 22312000, is suitable for FSR25 with OS nva 20-25 FP-S, stock # 22311000,.
The venturi is about 6.5-6.6mm ID and the nva is about 3.5mm OD.
I prefer Nelson nva, about 4.0mmOD, so I use 6.8-6.9mm venturi on my FSR25 for Doodlebug440.
It runs very well.
Aki

Title: Re: Anybody know where I can get a venturi for a O.S. .25FSR?
Post by: Norm Furutani on March 20, 2016, 10:42:36 AM

Andy-
Hulan Mathies, one of the Friday, Whittier Narrows gang can make you a venturi. I don't have his current ph# but I can get it if you're interested.

Norm Furutani

Title: Re: Anybody know where I can get a venturi for a O.S. .25FSR?
Post by: andy borgogna on March 20, 2016, 10:59:20 AM

Thanks everybody.  Norm if you can get the number that would be great.  At VSC I made a quick discovery, my electric Ringmaster was too heavy for the 3000' altitude.  So I want to build a new non-take apart version and build it as light as possible.  Switch from electric to glow with the O.S. .25.  It was funny the plane I was worried about the 60 powered Humongous performed very well at altitude, but the Ringmaster just about fell out of the sky in the vertical eight.  Even after I turned up the wick on the Ringmaster, just not enough power.
Andy

Title: Re: Anybody know where I can get a venturi for a O.S. .25FSR?
Post by: Bill Little on March 20, 2016, 03:38:25 PM

Hi Andy!

I am sure you can get a really nice venturi from Jim Lee, in any size you want for the .25FSR.  Also pretty sure Randy can set you up with one!

And I am sure the .25FSR will work great on the Ringmaster!

Good luck!
Bill

Title: Re: Anybody know where I can get a venturi for a O.S. .25FSR?
Post by: Norm Furutani on March 20, 2016, 06:48:49 PM

Email sent

Norm