Turnaround (Re: YS Engines)

[David Lockhart]

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 displacement
of a 2C).  Turnaround pattern was actually intended to do a number of
things - some of which was to reduce footprint and reduce specific engine
noise - 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 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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