Engines - long

JOddino JOddino at socal.rr.com
Wed Sep 29 14:15:29 AKDT 2004


 Remember the definition, an engine is a machine that doesn't make enough
power.

----- Original Message ----- 
From: "Dean Pappas" <d.pappas at kodeos.com>
To: <discussion at nsrca.org>
Sent: Wednesday, September 29, 2004 11:16 AM
Subject: RE: Engines - long


Aha!
Now we are on to something of import. Thanks for the jog, John.
For many of us, especially those less experienced in the event, it is wise
to choose airframes that do not demand the greatest horsepower.
Prophesies and Elan (I think that's already a plural) ought to be very
popular,
in those classes. In the low to mid nine-pound range, FZs and muffled
2-Cs are more than adequate, and possibly electrics with $400 batteries,
instead of $600 packs will be practical. The point is that reliably wringing
all of
the performance (or at least 95% of it) that is available from an engine,
is a painfully learned skill. What we recommend as entry-level Pattern
packages
should reflect this.

The problem is that everyone likes to have whatever Wolfgang or Christophe
are flying,
these days.

Any thoughts?

Dean Pappas
Sr. Design Engineer
Kodeos Communications
111 Corporate Blvd.
South Plainfield, N.J. 07080
(908) 222-7817 phone
(908) 222-2392 fax
d.pappas at kodeos.com


-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of John Ferrell
Sent: Wednesday, September 29, 2004 12:25 PM
To: discussion at nsrca.org
Subject: Re: Engines - long


Thanks for the details. I was coming to the same conclusions, but it was
going to take a long time. I came to Pattern when YS was a rising star and I
have never made any sort of peace with tuned pipes. The result is that I
have been more comfortable flying the YS 4S's. I don't think the engine is
going to make much difference in my flying, there are other factors limiting
me. Also, I have more of them than I care to admit!

Here is where I stand:
   Electric is just more $$$ than I want to spend.

DZ's are a separate animal... out of my range by both availability and cost.
Besides, I think that is    where most of the YS problems live. The cost of
fuel is second only to the electrics.

2 Strokes seem to be fragile (esp bearings), parts sometimes elusive or even
unobtainable. They also seem to be more pricey than they need be with their
simplicity. The biggest negative to me is the matter of dealing with the
fuel mixture/tuned pipe problems. I am beginning to weaken though.

When you say YS 4 stroke you have consider the model.
The 120SF is really inadequate for a full size 2m airplane.
The 120AC's are all but gone and so are the parts..besides being inadequate
today.
The 120SC was proof that YS could & would produce junk.
The 140L is a shaker with a tendency toward tempremental.
The 140 Sport/FZ is great IF it has enough guts to fly your aiprlane in your
class. I find it a push in Advanced with a Focus and a 16-10 Apc on 20%
nitro.

I don't think we have a good engine choice today, at least not for guys like
me.

My current plan is to drop back to the Prophecy/140 combination. At least it
is affordable and reliable to me.

John Ferrell
http://DixieNC.US

----- Original Message ----- 
From: "David Lockhart" <DaveL322 at comcast.net>
To: <discussion at nsrca.org>
Sent: Wednesday, September 29, 2004 12:32 AM
Subject: Re: Engines - long


> Warning - this email may offend both 4C and 2C fans.


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