MDS pattern engine?

[Ihncheol Park]

Dave,
Here is what I think.
For example, my OS 91SX-H is rated for 2.8HP at 15 or 16K rpm.
I used tuned pipe and APC 15x8, 20% nitro.  It runs at 10K rpm.
When I use thrust calculator downloaded from web, using above data, the
engine is at 2.8 horsepower range.

So, for MDS 148. If it can turn 16x10 at 9K rpm, it shows at 3.4 horse
power.  I am pretty sure that 148 can turn 16x10 at 9K when used with tuned
pipe.

To get most power out of engine, I think we can use tuned pipe and larger
diameter to get maximum power.

What do you think?

Ihncheol Park
-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of David Gundling
Sent: Wednesday, July 23, 2003 7:57 PM
To: INTERNET:discussion at nsrca.org
Subject: MDS pattern engine?


Message text written by INTERNET:discussion at nsrca.org
>Anyone tried the MDS 148? Side exhaust, 28oz, rated at 3.5hp.  Just
wondering if it is another option for a pattern plane<

I stongly suspect that the MDS 148 is rated at something like 13,000 rpm.
When you prop it down to a pattern level 8000 to 9000 you will have a 2 to
2.5 hp engine. Most of the sport 120s are rated that way. The pattern
engine to compare them with is the YS91. (I am assuming no pipe.)

FWIW

Dave
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