Info regarding Nat Penton's OS 91 setup

[Ihncheol Park]

Ray,

Thank you very much for your time finding the answers!!
I will be running the 91SX today.  Hope it doesn't rain.
it is about 60 degrees with ~ 20 miles wind.  cloudy.
I feel like 55 degrees or under.
It's not summer weather at all.

By the way, how did the VooDoo fly with that setting?
Good vertical?
He is using 2C140XL80 pipe based on diameter.
It is a 140 pipe, not 90 ~ 140, so I think I can use my BB 140 pipe.

My plane is under 8.25 pounds. (Explorer is under 8 pounds, Widebody is
under 7.75 pounds).  I will probably try APC 15x8 and 16x8 first, and 16x10
with 30% DZ fuel.
Thank you again,

Sincerely,

Ihncheol

-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Ray Rhodes
Sent: Sunday, June 22, 2003 4:00 AM
To: discussion at nsrca.org
Subject: Re: Info regarding Nat Penton's OS 91 setup


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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