[NSRCA-discussion] Dave's thoughts

[Koenig, Tom]

Hi Guys,

Just my opinion, Dave is right.

It also depends at what level you want to play at-but I do agree- it is difficult to keep a roaring Dingo legal. I go to a lot of trouble to shut mine up-only to be dismantled in the sky by the "cheats", which are impossible to catch/police and confront.

My flying buddy has his OS 160 on a Mintor pipe, as Dave says, 15 % etc and a lot less fuel than me. Not only is he making the noise level easily, but on most days I have to reluctantly agree that my beloved Dingo may as well be a gay Hollywood Poodle- as I stooge back to the top of a square loop on corner with half rolls, on a hot day with a 30 knot cross wind.

Will I change to the same set up? Nope-I love my mongrel engine ( I have a lot of good days too), and I like the torque as Dave explains.....until I fly the new vacuum cleaners! Like a Dyson...never looses suction <VBG>

Dave is right there too. I'm afraid if you want to be at the pointy end of the sport, though  not mandatory ( as has been discussed many times), it will be the most suitable tool with which to get the job done.

Again, just my opinion and not intended to ruffle any feathers.

Tom



-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of David
Lockhart
Sent: Friday, 3 March 2006 2:30 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] First day out with OS 140RX (somewhat
long)


I agree that a good running YS is a great glow powerplant for pattern, and
the folks at YS Performance provide great service to the YS faithful.  And
to get solid performance, you need only to slap on any one of a number of
headers and mufflers at pretty much any length, dump lots of 30% nitro low
viz oil fuel, bolt on a prop that will hit sufficient RPM to bust the
noisemeter at 80% stick, and set the needle.  Good power, good torque, and
nice throttle curve are the likely result - along with plenty of noise and
vibration (relative to a 2C).

Should you choose the 2C glow - the upfront is substantially lower, and
either the OS140RX, Mintor140, or Webra160 will save you 3-4 oz on the
engine alone (mounts, props, spinners, headers, muffler/pipes are pretty
much a wash), and another 1-2 can be pulled off the OS and Webra if you feel
the need.  And they will run on cheap 15% nitro and make plenty of power.
And I've found 12 oz of fuel in a simple two line tank more than enough to
get through F3A flights in any condition (as a matter of fact, I have done
PO5 2x in calm air on 12 oz).  So in comparison to the YS (which uses 20 or
more oz of high test in a double walled bladder tank for the same flight
time), my takeoff is about ONE POUND lighter.  Why do we work so hard to
shave ounces and grams off the planes?  ......And the down side of the 2C -
to get the lighter weight, lower vibration, cheaper purchase and operating
cost, you will need to learn how to tune the tuned pipe (it ain't called
"tuned" pipe for no reason) - or just copy anyone of the many setups around
that already have a nice fat torque curve and good throttle response.

Of course, that is just my experience of 20 years having bought every single
ST, Rossi, YS (2 and 4C), OS, and Webra I've ever competed with (and soon to
be ?? electric motor).

Regards,

Dave Lockhart
DaveL322 at comcast.net


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