YS Engines

[Bjorn Lehnardt]

You forgot to mention the fuel sponsorships.  If you fly a YS a lot, a fuel
sponsorship
might be as valuable as the YS engine sponsorship.

Didn't the rise of the YS fourstroke happen about the same time as the
change to
the turnaround style of patterns?  I know there was a large drop in the
number
of pattern flyers and the new patterns got much of the blame.  I wonder if
the
increased cost of competition had a part in that.

I had a Rossi with inflight mixture control.  If I'd had a radio to do it,
it could have
worked like the new Webra MC carb setup.  If the rules back then had allowed
it, I bet we would have seen large two strokes with fancy carbs a very long
time
ago.

----- Original Message ----- 
From: "David Lockhart" <DaveL322 at comcast.net>
To: <discussion at nsrca.org>
Sent: Sunday, March 28, 2004 10:18 PM
Subject: Re: YS Engines


Ed,

I took a quick look at the 2003 Nationals results for Masters and FAI.
Looks like 1st place in Masters was a 2C, and 5 of the top 10 in Masters
were 2Cs.  FAI was won by a YS4C, and 4 of the top ten were 2Cs.  If memory
serves me correctly, all 6 of the 4C fliers are sponsored by YS and one of
the 2C fliers might be sponsored.

I've been flying FAI for 5 seasons and used 3 different 2C setups and don't
feel that I am missing out on a warm fuzzy feeling.  Maybe that is because
my 2C is cheaper, vibrates less, requires less maintenance, and is more
reliable than a 4C (parts is parts).  And I've not yet found a 140DZ or
160DZ (w/ 30% nitro) with enough power to spin the prop I am running on my
2C (w/ 20% nitro) - and yes, my 2C has plenty of torque and a linear
throttle.  Oh yes, it is also quieter and uses less fuel per flight than a
140/160DZ.

4Cs became very popular in pattern when the rules changed to allow a 4C to
have 2x the displacement of the 2C and YS very successfully exploited that
rule change and designed and produced some very powerful competition 4Cs.
Had it not been for that rule change, I doubt the 4C would have ever even
become popular in pattern.  As the current rules do not give an advantage to
a 2C or 4C, the 2Cs will return to dominance - unless the electrics take
over first.

But then again, as others have pointed out, some pattern guys just like to
buy the most expensive toys and spend endless hours tinkering..............

Regards,

Dave Lockhart
DaveL322 at comcast.net


  ----- Original Message ----- 
  From: Troy Newman
  To: discussion at nsrca.org
  Sent: Sunday, March 28, 2004 11:16 PM
  Subject: Re: YS Engines


  Yamada the company that makes YS motors is dedicated to the support of F3A
(pattern on the international scene).

  The main reason YS motors dominate is because of their performance. The
problem is there are limited sizes of motors....The YS 160DZ is now the
biggest motor produced. It can fly about a 13lb plane and still have enough
power to hover it. So a 100" IMAC model just isn't in the realm of the YS
motor. If YS made a 100cc gas motor man alive would everybody want one. Mr.
Yamada knows how to make Horsepower!

  It is my understanding that Mr. Yamada used to work at Honda back in the
old days when the small Honda motors were revolutionary in motor cycles,
smaller compact cars and so on.

  As for Fun fly planes the YS 63 is probably the ultimate power plant for
any 46 sized model. Its got tremendous power and without a weight problem.
The Flip 3D's, Madness, and other 3D funfly planes like the Hover Cobra,
Magic, Razor, and UCD 46 are perfect models for the 63


  I have seen YS 140Sport,s and 140L's run scale models up to 15-17lbs and
depending on the plane it will fly them but you will not have the extra
power.

  Now Heli's YS has a good foothold with the different motors they offer
including a 91 4stroke Heli motor.

  YS engines are probably the best model motors produced today.

  I can choose any motor I want to run and I choose the YS motors above
others because of the quality and performance. Here in recent years the
2cycle motors have taken a foothold in the lower classes of pattern flying.
They make tons of power and tend to give a less experienced flyer a warm
fuzzy feeling. They will make good power on 15% nitro and even not setup
correctly they will make big power....I have run them from the OS EFI, to
the Webra with mixture control carbs. With other in between.

  I prefer the YS 4 strokes because they perform better. So the main reason
YS dominates Pattern and not other forms is because they focus on pattern
models and pattern type setups. Because of this focus the motors do the job
the best....The bigger models just will have to wait for YS to produce
bigger motors if ever.


  Troy Newman

  ----- Original Message ----- 
    From: Edward C. Hernandez
    To: discussion at nsrca.org
    Sent: Sunday, March 28, 2004 8:55 PM
    Subject: YS Engines


       Ok, time for another newbie question: it seems to me from the
discussion and contest results and a few copies of the K factor that Kane
gave me at the D4 contest last year that pattern pilots prefer YS engines,
yet YS engines don't seem to dominate in other kinds of flying(IMAC, scale,
fun fly, etc). Um, why?

    Ed Hernandez


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