YS .45 or an OS .46 FX
Mike Griffin
The YS .45 is a wonderful engine, but not a sport engine. It is geared
toward
high power, and performs best with a tuned pipe and lots of revs.
Mike
hollywood wrote:
> Is the YS .45 a stronger engine than the OS .46 FX engine? What will the
> YS .45 turn a APC 10x6 at? Can anybody steer me to the best sport engine
> in the .40 to .46 size with a price of around $150.00 or less.
Scott McAfee
HIEMSTRA wrote:
>
> Mike Griffin <mgri...@pnbwt.com> wrote in article
> <34BABE81...@pnbwt.com>...
> > The YS .45 is a wonderful engine, but not a sport engine. It is geared
> > toward
> > high power, and performs best with a tuned pipe and lots of revs.
> > Mike
> YS sells for this engine . Yes the pipe will cause it to turn up a bit more
> but you sacrifice some user friendliness . With the YS muffler it turns the
> 11x7 reccomended at around 11,000 to 11,500 . It is also much more reliable
> than most of the other sporet enginrs in it's class due to the pressurized
> fuel system . Most people who have ever had one of these beauties really
> love them .
What muffler? If there ever was a engine designed for a pipe the YS is
it. Why would you put an 11-7 on a 45? This motor needs a 10-7 or 10-8
maximum. If you want to turn an 11-7 get a light .60 like which is
designed for this prop load.
Scott
Charley Robinson
HIEMSTRA wrote:
>
> Mike Griffin <mgri...@pnbwt.com> wrote in article
> <34BABE81...@pnbwt.com>...
> > The YS .45 is a wonderful engine, but not a sport engine. It is geared
> > toward
> > high power, and performs best with a tuned pipe and lots of revs.
> > Mike
> Not true Mike . The .45 YS actually performs best with the muffler that
> YS sells for this engine . Yes the pipe will cause it to turn up a bit more
> but you sacrifice some user friendliness .
Heimstra,
Mike's right. It says right in the YS instructions that the engine
was designed for use with a pipe. Besides, I don't know of a YS muffler
for my .45 rear exhaust. I've never seen a more user-friendly engine
that the YSs with a pipe. I used to fly with a guy who ran a YS .60 SE
on a muffler. Never could get it to run right, while my piped engine
runs super and is very user-friendly.
CR
Charley Robinson
Scott McAfee wrote:
>
> What muffler? If there ever was a engine designed for a pipe the YS is
> it. Why would you put an 11-7 on a 45? This motor needs a 10-7 or 10-8> maximum.
> Scott
Scott,
Not necessarily. I ran a 10x7 Rev-up ( didn't have APCs back then) on
a YS .45 RE with a short nitro pipe in a small P-39 for warbird racing.
According to my old notes it was turning around 15,500 in the air.
The same engine in a small pattern bird with a longer muffled pipe
works well with an 11x8 APC. Lot's quieter too.
It's all according to what the model is designed to do. Just to say
"this size engine should use that size prop" is oversimplifying.
--
Charley Robinson <ccro...@ktc.com> AMA 6903 CD/LM
Charley Robinson
Dan Martinmaki wrote:
>
> I have been flying a YS .45 all last summer and it is the most easy to
> operate engine I have owned. With a 11-6 APC it peaks at 14000 with a
> Hatori pipe. The only draw back is the $130 price tag of the pipe/header
> combination. It pulls a 6.5lb. Sig Kougar straight up without slowing down.
> You set the pump adjustment for idle and the needle valve for top end and
> you don't have to worry about tinkering with it. I also fly OS .46s and
> love them but they won't ever hold a candle to the YS in any way besides
> price.
> Dan
>
> Dirk J. Grossman <dgr...@monmouth.com> wrote in article
> <34BAFA...@monmouth.com>...
> > hollywood wrote:
> > >
> > > Is the YS .45 a stronger engine than the OS .46 FX engine? What will
> the
> > > YS .45 turn a APC 10x6 at? Can anybody steer me to the best sport
> engine
> > > in the .40 to .46 size with a price of around $150.00 or less.
> >
> >
> > power. I use a APC 11x6 or 11x7 I think it turns around 13,800
> > with the 11X7 and a tuned pipe. It is about 6 years old and it still
> > run great. It pulls my big stick 40 (6.75 Lbs.) straight up
> > and out of sight. I just bought my second one last week!
> >
> > Dirk J. Grossman
> >
You can buy a Mac's header and pipe for about half that and it will
run just as well.
Charley Robinson
hollywood wrote:
>
> Is the YS .45 a stronger engine than the OS .46 FX engine? What will the
> YS .45 turn a APC 10x6 at? Can anybody steer me to the best sport engine
> in the .40 to .46 size with a price of around $150.00 or less.
Hay Hollywood,
Buy a Fox .46 ABC and live happily everafter. Both the YS and the OS
have nickle plating in the cyinder (ABN), although I think the YS's is
better than the OS's; I have a YS that has run run for years. With the
Fox you get true chrome (ABC). Lower cost and made in the USA!
hollywood
HIEMSTRA
Mike Griffin <mgri...@pnbwt.com> wrote in article
<34BABE81...@pnbwt.com>...
> The YS .45 is a wonderful engine, but not a sport engine. It is geared
> toward
> high power, and performs best with a tuned pipe and lots of revs.
> Mike
Not true Mike . The .45 YS actually performs best with the muffler that
YS sells for this engine . Yes the pipe will cause it to turn up a bit more
Dirk J. Grossman
Dirk J. Grossman
The YS 45 is a little heavier than most 45's but it makes up for it on
power. I use a APC 11x6 or 11x7 I think it turns around 13,800
with the 11X7 and a tuned pipe. It is about 6 years old and it still run
great. It pulls my big stick 40 (6.75 Lbs.) straight up
and out of sight. I just bought my second one last week!
Dirk J. Grossman
hollywood wrote:
Dan Martinmaki
I have been flying a YS .45 all last summer and it is the most easy to
operate engine I have owned. With a 11-6 APC it peaks at 14000 with a
Hatori pipe. The only draw back is the $130 price tag of the pipe/header
combination. It pulls a 6.5lb. Sig Kougar straight up without slowing down.
You set the pump adjustment for idle and the needle valve for top end and
you don't have to worry about tinkering with it. I also fly OS .46s and
love them but they won't ever hold a candle to the YS in any way besides
price.
Dan
Dirk J. Grossman <dgr...@monmouth.com> wrote in article
<34BAFA...@monmouth.com>...
> hollywood wrote:
> >
> > Is the YS .45 a stronger engine than the OS .46 FX engine? What will
the
> > YS .45 turn a APC 10x6 at? Can anybody steer me to the best sport
engine
> > in the .40 to .46 size with a price of around $150.00 or less.
>
>
> The YS 45 is a little heaver than most 45's but it makes up for it on
HIEMSTRA
Scott McAfee <smc...@earthlink.net> wrote in article
<34BAF4...@earthlink.net>...
> HIEMSTRA wrote:
> >
> > Mike Griffin <mgri...@pnbwt.com> wrote in article
> > <34BABE81...@pnbwt.com>...
.
> What muffler? If there ever was a engine designed for a pipe the YS is
> it. Why would you put an 11-7 on a 45? This motor needs a 10-7 or 10-8
> maximum. If you want to turn an 11-7 get a light .60 like which is
> designed for this prop load.
> Scott
Scott , YS sells a "tuned"
muffler for this engine that works nice too . As for the 10x7, 10x8 prop i
like to turn my engines a little slower than some and the .45 does it
nicely . I'm not into the speed of stink like some other guy's , thats all
Mark Orr
If you can afford the YS get it....I like pumped engines...but the YS is big
$$. Pumps add complexity.....but their idle is FANTASTIC....I would probably
buy the OS or TT Pro .46. 'cos the premium for a pumped engine is just too
high.
Mark
Charley Robinson
It's not really a pump, Mark. It's a system that pressurizes the tank
and regulates the pressurized fuel coming to the carb. The PITA is
installing the extra plumbing and avoiding getting fuel in the face
from opening the wrong fuel line first to refuel. ;->
Alan Hoes
hollywood wrote:
>
> Is the YS .45 a stronger engine than the OS .46 FX engine? What will the
> YS .45 turn a APC 10x6 at? Can anybody steer me to the best sport engine
> in the .40 to .46 size with a price of around $150.00 or less.
I have a YS 45 RE turning a 10/8 APC @ 14600 r.p.m.'s on a GP Patriot.
I use Powermaster YS 20/20 with a McCoy RC 59 plug and a Mac tuned
muffled pipe. I don't know the how an OS 46 would compare to this combo
but, I've been told it is very impressive.
-alan
Scott McAfee
Charley Robinson wrote:
>
> Scott McAfee wrote:
> >
> > What muffler? If there ever was a engine designed for a pipe the YS is
> > it. Why would you put an 11-7 on a 45? This motor needs a 10-7 or 10-8> maximum.
>
>
> Scott,
>
> Not necessarily. I ran a 10x7 Rev-up ( didn't have APCs back then) on
> a YS .45 RE with a short nitro pipe in a small P-39 for warbird racing.
> According to my old notes it was turning around 15,500 in the air.
>
> The same engine in a small pattern bird with a longer muffled pipe
> works well with an 11x8 APC. Lot's quieter too.
>
> It's all according to what the model is designed to do. Just to say
> "this size engine should use that size prop" is oversimplifying.
You're absolutely right, each application is different. However, as a
racer and engine fanatic, I tend to always try to operate my motors at
the peak of their available power curve. The YS is such a user friendly
motor with a wide power band that using an 11-7 (which it does
reccommend in the instructions) is not giving much away in useable power
and will be more appropriate for some applications.
BTW, as for the original question, I believe that a Rossi .45 represents
the best value for a user-friendly engine that will last forever and
deliver great idle and top end. It may push the $150 envelope to its
limit though where a Thunder Tiger is a great motor for half the price
and you don't give up much.
Scott
Charley Robinson
Scott,
Whatever turns yer prop. (G)
Here's a bit of YS trivia: There was a guy by the name of Tim Cardin
at a warbird race in Mesa, AZ, who was using a small Kingcobra, with a
YS .45, as a backup model. I noticed he had a pressure tap and hose on
the pipe. I knew Tim from previous racing so I had the temerity to ask
him about it. Turned out he was running the engine in the 18K rpm range
with Quickee props. He said that at that rpm range, the pressure system
couldn't keep up, so he removed the guts from the regulator and ran
muffler pressure. He also said he had to open up the clearance on the
lower end of the rod or it would sieze at those revs.
I never tried it because I could go about as fast at lower revs with
higher pitch.
Trifraug
Charley Robinson wrote:
>
[Snip]
> Hay Hollywood,
>
> Buy a Fox .46 ABC and live happily everafter. Both the YS and the OS
> have nickle plating in the cyinder (ABN), although I think the YS's is
> better than the OS's; I have a YS that has run run for years. With the
> Fox you get true chrome (ABC). Lower cost and made in the USA!
I've yet to find an engine with better fits than the Fox .46ABC, and the
carb isn't what it looks like. Far from being a cheesy air-bleed carb it
actually uses a metering slit (like a Perry) fed by a tapered ramp (like
nothing else I know of) to optimize both idle and midrange. The
air-bleed is just a super-fine idle trim. Maybe someday I should try
adjusting mine. It just runs so well that tweaking it seems pointless.
...Trifraug
Mike Griffin
I've had my YS45 on both pipe and a Slimline muffler, and it was much
better with the pipe (power and friendliness). I love the engine, in fact
I own one of them and also a YS61 and YS91AC. Pricey engines, but
you get what you pay for (if not more). Though it's a great engine, I still
wouldn't consider it a 'sport' engine, because of the price.
I'd recommend either the OS or a Thunder Tiger for a sport engine.
HIEMSTRA wrote:
> Mike Griffin <mgri...@pnbwt.com> wrote in article
> <34BABE81...@pnbwt.com>...
Mark Kriz
Hi Alan and all,
I have the OS .46 SF ABC on a GP Patriot with MAC pre-tuned pipe. This
the McCoy 59 plug, a 10x7 APC prop, and PowerMaster 15% nitro, it turns
just over 14,000 rpm on the ground. Just thought I'd let you know.
Mark Kriz, S.J.
Charley Robinson
Bob Adkins wrote:
>
> On Tue, 13 Jan 1998 20:37:53 -0800, Bob Adkins wrote:
>
> Scott,
> >
> > Here's a bit of YS trivia: There was a guy by the name of Tim Cardin
> >at a warbird race in Mesa, AZ, who was using a small Kingcobra, with a
> >YS .45, as a backup model. I noticed he had a pressure tap and hose on
> >the pipe. I knew Tim from previous racing so I had the temerity to ask
> >him about it. Turned out he was running the engine in the 18K rpm range
> >with Quickee props. He said that at that rpm range, the pressure system
> >couldn't keep up, so he removed the guts from the regulator and ran
> >muffler pressure. He also said he had to open up the clearance on the
> >lower end of the rod or it would sieze at those revs.
>
>
> This pressure system is self adjusting according to engine RPM. It has
> more than enough capacity for any RPM the engine can turn.
>
> I won't argue about the rod end. This is a common problem among high
> output engines.
>
> > I never tried it because I could go about as fast at lower revs with
> >higher pitch.
>
> normally like to run my high output engines in the 16000-19000 RPM
> range, but I ran my YS's at only 15000 max. They make great power even
> at this low RPM.
>
> Bob ICQ# 1630624
>
You misunderstand my meaning, Bob. It wasn't capacity he was talking
about. He said the regulator quit metering correctly because of the
inertia in the reciprocating parts.
Another thing: it's not a pump! Also, it sounds like you've never
tried it, so how could you know whether he was right or wrong? Huh?
Huh?
Cregger
Trifraug wrote:
>
> I've yet to find an engine with better fits than the Fox .46ABC, and the
> carb isn't what it looks like. Far from being a cheesy air-bleed carb it
> actually uses a metering slit (like a Perry) fed by a tapered ramp (like
> nothing else I know of) to optimize both idle and midrange. The
> air-bleed is just a super-fine idle trim.
You have just described the "air bleed" carburetor used on
the Enya .40 & .45 CX series of engines. I've been trying to
explain to people for years that it is not a traditional air
bleed carb and that it is a metered carb that is
sophisticated enough for serious usage. However, I was not
aware of the fact that Fox's new carb was of this design.
Thanks for the information.
Ed Cregger
ecre...@jnlk.com
HIEMSTRA
Bob Adkins <bo...@mindspring.com> wrote in article
<34c00ab1...@news.mindspring.com>...
> On Wed, 14 Jan 1998 09:15:41 -0800, Bob Adkins wrote:
> Hey....Want to buy a NIB .45 rear? How about a used side? Real cheap!
>
>
How cheap on the side Bob? They are my favorite anyway . Got a beat up old
.60 Webra Rear intake Side exhaust i'd trade you . Jim Hiemstra
hiem...@netins.net
Charley Robinson
Bob Adkins wrote:
>
> On Wed, 14 Jan 1998 09:15:41 -0800, Bob Adkins wrote:
>
>
> > You misunderstand my meaning, Bob. It wasn't capacity he was talking
> >about. He said the regulator quit metering correctly because of the
> >inertia in the reciprocating parts.
>
> possible. I do know that unless your friend modified his porting and
> crank, that he is above the power band for the YS .45. It peaks out at
> about 17000 because of the unusual torque. The YS likes bigger props
> than normal .46 engines.
>
> > Another thing: it's not a pump!
>
> regulating mechanism. If that's not a pump, then what else creates tank
> pressure? Fairies? :-)
>
> Geez....let's not get too wrapped up in trivialities. In general
> conversation, it does not matter exactly where the pressure comes from,
> does it? Everyone knows about the YS pressurization system by now,
> Charley...it's been beat to death on this news group for years.
>
> >Also, it sounds like you've never tried it, so how could you know whether
> >he was right or wrong? Huh?>Huh?
>
> the years. How many do you have? Huh? Huh? :-)
>
> Hey....Want to buy a NIB .45 rear? How about a used side? Real cheap!
>
>
> "From the Heart of Cajun Country"
>
> To remove spam block from
> address, remove the 1997
>
> SPAM Bait: rhu...@fcc.gov jqu...@fcc.gov sn...@fcc.gov rch...@fcc.gov
>
>
See what I mean? You tell me you've never run one over 17K but you
still think you know better than Tim about running them at higher rpm
than 17K. Hoo boyyyy......
Then you tell me the fuel tank is "pressurized with the help of a
regulating mechanism." Wrong! The tank is pressurized by applying
crankcase pressure from a bleed hole in the crankshaft, through a
check-valve. The regulator is for metering fuel the pressurized and is
part of the carb. There is no pump.
I only own two YS 2-stroke engines (.45 & hopped-up .60) as of now,
but I sure understand them better than you do.
HIEMSTRA
Bob Adkins <bo...@mindspring.com> wrote in article
<34d08bbe...@news.mindspring.com>...
> On 15 Jan 1998 22:05:35 GMT, Bob Adkins wrote:
>
>
> >> Hey....Want to buy a NIB .45 rear? How about a used side? Real cheap!
> >>
> >>
> >How cheap on the side Bob? They are my favorite anyway . Got a beat up
old
> >.60 Webra Rear intake Side exhaust i'd trade you . Jim Hiemstra
> >hiem...@netins.net
>
>
> Jim,
>
> $70....you pay shipping. Might throw a goodie or 2 in with it too.
>
> Don't need any big motors, but will trade for a .32-.36 of some
> sort....preferably an OS, Webra, or Enya heli.
>
>
> Bob ICQ# 657746
>
> "From the Heart of Cajun Country"
>
> To remove spam block from
> address, remove the 1997
>
> SPAM Bait: rhu...@fcc.gov jqu...@fcc.gov sn...@fcc.gov rch...@fcc.gov
Sounds good Bob but i have to get rid of the Webra first . Have a swap
meet coming up in about 2 weeks i'll get back to you after . Thanks Jim
Hiemstra
Jim White
Charley Robinson <ccro...@ktc.com> wrote:
> Then you tell me the fuel tank is "pressurized with the help of a
>regulating mechanism." Wrong! The tank is pressurized by applying
>crankcase pressure from a bleed hole in the crankshaft, through a
>check-valve. The regulator is for metering fuel the pressurized and is
>part of the carb. There is no pump.
yup...yup.... but one correction... isn't the pressure pickup from the
crank rotory-valve opposite the carb ??? this would be timed pressure
and doesn't require a check valve...
Jim White
AMA 2466
WB2WOY
WPMPA/BCF
Treasure Island, FL
Charley Robinson
Jim White wrote:
>
> Charley Robinson <ccro...@ktc.com> wrote:
> > Then you tell me the fuel tank is "pressurized with the help of a
> >regulating mechanism." Wrong! The tank is pressurized by applying
> >crankcase pressure from a bleed hole in the crankshaft, through a
> >part of the carb. There is no pump.
> > Charley Robinson <ccro...@ktc.com> AMA 6903 CD/LM
>
> yup...yup.... but one correction... isn't the pressure pickup from the
> crank rotory-valve opposite the carb ??? this would be timed pressure
> and doesn't require a check valve...
>
> Jim White
> AMA 2466
> WB2WOY
> WPMPA/BCF
> Treasure Island, FL
Jim,
It's been over a year since I've had one of the things apart.
Lessee, the pressure to the tank comes off of the intake port in the
crank. Positive pressure is there only when the port is closed to the
carb and the piston is traveling downwards, producing positive crankcase
pressure. This also pushes the regulator diaphragm down. On the intake
stroke there must be some overlap, allowing atmospheric pressure to be
felt at the diaphragm chamber so the diaphragm can relax. The diaphragm
chamber is where the pressure fitting to the tank is connected, so the
check valve keeps the fuel tank pressure from being vented back through
the diaphragm chamber to the atmosphere.
If the above isn't exctly right, it's close. I'd have to take the
carb and regulator off one of my engines again to be sure.
--
Trifraug
Cregger wrote:
>
[Snip]
>
> You have just described the "air bleed" carburetor used on
> the Enya .40 & .45 CX series of engines. I've been trying to
> explain to people for years that it is not a traditional air
> bleed carb and that it is a metered carb that is
> sophisticated enough for serious usage. However, I was not
> aware of the fact that Fox's new carb was of this design.
> Thanks for the information.
>
> Ed Cregger
> ecre...@jnlk.com
Not being familiar with Enyas (except in the most generic sense of
knowing they're good engines seldom seen at my local field) I wasn't
aware of anything about their carbs except the air bleed screw being
plainly visible. It's a good idea, and one that works well in practice.
...Trifraug
Scott McAfee
Charley Robinson wrote:
Charley:
I know Tim, he is a local here in So Cal and I flew with him for a while
when he was into Q500 racing. Tim usually gets his stuff working pretty
well so I guess what he did works, although his stuff never ran as well
as mine...hah hah. The YS uses timed pressure which although slightly
less than pure crankcase pressure is so minimal a differene as to be
negligable. At high RPM, pipe pressue is more than adequate to
pressurize the tank for consistent fuel flow but I can't imagine that
the pressure created by any of method would overpower the YS regulator.
But I will investigate. Richard Verano is the guy at Futaba who is the
YS expert and I will ask him as I speak to him regularly.
Scott
Charley Robinson
Tim didn't say anything about overpowering the regulator! He said he
found it couldn't keep up at 19K + RPM. Too much inertia in the
reciprocating parts.
Good luck with Verrano or anyone else at Futaba on a YS 2-stroke
question. Those dumb bunnies couldn't even tell me the exhaust duration
on the .45RE when I wanted to know. Nor did they know how to find out.
I had to measure it. Anyway, unless Verrano has run a modified .45 RE
at 19-22K on a 12 1/4" pipe, he won't know the answer.
CR