YS Engines

[Lance Van Nostrand]

Vincent,
You might consider a Mintor 2 plug head for your OS140.  It will help the
idle and is easier than repitching props.
--Lance

----- Original Message ----- 
From: <vicenterc at comcast.net>
To: <discussion at nsrca.org>
Cc: "David Lockhart" <DaveL322 at comcast.net>; <discussion at nsrca.org>
Sent: Monday, March 29, 2004 5:02 PM
Subject: Re: YS Engines


> Looks like I need to learn how to re-pitch 3 blade props.
>
> I have two planes a Hydeout (with retracts) with an OS 140 RX.  I would
like to reduce the downline speed.  I have a Focus with a Mintor 140 that is
OK on the downlines but probably will be better is I can reduce the speed a
little.
>
> Yesterday, I tried to go down to 1500 rpm but the engine dies on the spin.
The minimum possible is around 1700 rpm.
>
> Another solution is for me is to buy a 3 blade prop standard that will
work with the OS-140.  Any ideas?
>
> I just realize that I have to buy a new spinner also.
>
> Vicente
> > Nat,
> >
> > Yes and no.
> >
> > No - given same prop and same idle RPM.  However, given the different
nature
> > of the engines, it seems pretty logical to me that the best 4C prop is
not
> > going to be the best 2C prop.  Idle RPM - the average 140/160 DZs I've
seen
> > idles faster and rougher than the average L or FZ (the DZs of course
make
> > much more power than the L or FZ), and the big 2C happily idles slower
and
> > smoother than a DZ, L, or FZ.
> >
> > Yes - using a setup oriented for the 2C.  The last 2 years I've run an
APC
> > 15.75-11 3 blade (repitched from the 15.75-13) with the idle set at
about
> > 1700 on the OS 140 EFI (same idle speed when I ran the 140RX).  I
believe
> > this setup provides better downline braking than the average 4C setup
> > (especially a DZ).  And if I choose, I can lower the idle to 1500 and it
is
> > still reliable and doesn't shake apart the plane.
> >
> > The past 3 years, I flown a pair of EMCs that are 10.75 pounds and very
> > clean (all servos, switches, fuel lines, fasteners, etc are mounted
>
> > internally or flush).  The first year, a couple people thought I was
> > constant speed - but too fast everywhere (too much power is such a
terrible
> > problem to have.........).  The past two years I've used the 3 blade,
and
> > many people at the NATs and locally (D1, D2, and D4) have remarked how
slow
> > my plane is in a downline, and how constant speed the plane is - which
is
> > nice to hear - because that was my goal after the first year.  Several
> > others have tried the prop and plan to run it for 2004 - I think that in
> > itself speaks volumes.
> >
> > Dave
> > DaveL322 at comcast.net
> >
> >
> > ----- Original Message -----
> > From: Nat Penton
> > To: discussion at nsrca.org
> > Sent: Monday, March 29, 2004 2:05 PM
> > Subject: Re: YS Engines
> >
> >
> > Dave can you get the downline braking with a two stroke you can get with
a
> > four ?          nat
> > ----- Original Message -----
> > From: David Lockhart
> > To: discussion at nsrca.org
> > Sent: Sunday, March 28, 2004 11:18 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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