Info regarding Nat Penton's OS 91 setup

[Ray Rhodes]

Hi Ihncheol, and David,
I had a nice talk with Nat Sat. The answers are inserted below.
Have a great day,
Ray
----- Original Message ----- 
From: "Ihncheol Park" <PatternFlyer at msn.com>
To: "NSRCA" <discussion at nsrca.org>
Sent: Saturday, June 21, 2003 1:59 AM
Subject: Info regarding Nat Penton's OS 91 setup


> Hi, All,
>
> Since I don't have any contact info for Nat Penton (Known for VooDoo 2M
> plane), I thought I would ask here.
>
> Will someone who see the plane flying this weekend check out the engine
set
> up for me?
>
> I heard Nat Penton will be at Netherland contest.
>
> I would like to know the following information.
>
> if the engine is 91SX-H or 91FX?

He uses both, and finds little difference. Curently using "H"


> Prop size, fuel, rpm, pipe used?  I heard it is ES Carbon, but not sure
> which one.

17x10 N. cut down to 15.5 ---Riches brew 20/20---Mid 7,000s---ES 2stroke
1-9/16  O.D. carbon pipe.


> Length of the pipe from plug to first baffle or back end of the pipe.

28 inches from plug to baffle.


> I'm trying to setup my 91SX-H with a tuned pipe in my JR Explorer 90 or
> Widebody 60.
>
> So far he is the only one actually using a large prop. (heard it was 17x10
> cut to 16x10 at 8000rpm)

16x10 will work, but he is currently using "about" 15.5 dia. and getting mid
7000s.
Nat`s plane weighs 8.25 lb.If yours is heavier, shorten the pipe 1 or2
inches, and maybe use less prop.


> My 91SX after 1/2 gallon through it, turns 13x8 at 11100 rpm with 91FX
> muffler, 20% coolpower.
>
> Thank you,
>
> Ihncheol Park
> 1973 White Ave., #402
> Moscow, ID 83843
> (208) 883-7882 (home)
> (208) 661-5018 (cellular)
> PatternFlyer at msn.com
> http://www.geocities.com/beaton90
>
>
>
>
>
>
>
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