Turnaround (Re: YS Engines)

[CHAD NORTHEAST]

Just FYI

If I remember correctly from this past Worlds I worked it out to 53% YS to 47% Two-Stroke (OS, Webra, Mintor).

The top 10 went like this

1. YS
2. YS
3. YS
4. YS
5. YS
6. OS
7. Hacker :)
8. YS
9. Webra
10. YS

Even through the top 30 there is still a pretty good number of 4 strokes vs two strokes.


Chad


----- Original Message -----
From: David Lockhart <DaveL322 at comcast.net>
Date: Monday, March 29, 2004 9:29 am
Subject: Turnaround (Re: YS Engines)

> Bjorn,
> 
> Yes, the rise of the YS 4C in pattern was shortly after the change to
> turnaround (and mostly the rules that allowed a 4C with 2x the 
> displacementof a 2C).  Turnaround pattern was actually intended to 
> do a number of
> things - some of which was to reduce footprint and reduce specific 
> enginenoise - at that time 4Cs were turning much slower RPMs (than 
> the 2Cs) and
> were quieter (and still down on power at 2x the displacement).  
> Times have
> changed!!!
> 
> So far as the number of pattern competitors dropping out - some 
> dropped out
> because they did not like the turnaround style of flying.  Some 
> dropped out
> because they did not have the time to develop/learn new setups 
> which would
> be needed to remain competitive.  Others absolutely dropped out 
> because of
> the increased cost - and that has happened several times -
> - when newer 2C "longstrokes" and lower RPM pipes arrived bringing a
> competitive advantage (and for the most part the newer stuff was more
> expensive),
> - when 4Cs started to gain an edge in power, and the planes got bigger
> (again more expensive),
> - when the current rules allowing unlimited displacement engines 
> went into
> effect (again more expensive).
> 
> Regarding fuel sponsorship - I and a couple of pattern guys buy 
> our fuel in
> drums from a local supplier (S&W) - 15% is well under $7.00 per 
> gallon.  I'm
> quite happy to not know what a gallon of 30% DZ fuel costs 
> ($20.00+ per
> gallon)??
> 
> Regards,
> 
> Dave
> 
> 
> 
> ----- Original Message -----
> From: "Bjorn Lehnardt" <blehnardt at att.net>
> To: <discussion at nsrca.org>
> Sent: Monday, March 29, 2004 1:03 AM
> Subject: Re: YS Engines
> 
> 
> > 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 
> advantageto
> > 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
> >
> >
> > =====================================
> > # To be removed from this list, go to 
> http://www.nsrca.org/discussionA.htm> and follow the instructions.
> >
> 
> =====================================
> # To be removed from this list, go to 
> http://www.nsrca.org/discussionA.htmand follow the instructions.
> 
> 

=====================================
# To be removed from this list, go to http://www.nsrca.org/discussionA.htm
and follow the instructions.