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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › Mirgrate YS50 from OS50 (non-hyer)
03-08-2008 12:11 AM  10 years agoPost 1
dennis052

rrApprentice

San Diego, CA, USA

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I am using OS50 non-hyper engine with MP5 for Trex600 nitro now. And, I want to learn more extreme 3D moves which may need more power and punch. This is a brand new YS50ST and align pipe in my garage but I want to practice on and abuse the OS50 engine before touching the brand new engine.

I really want to know what kind of difference in power and punch I will expect if I use the YS50/Align pipe instead of the old OS50 non hyper. Maybe it is time to switch and have fun. Please comment.

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03-08-2008 02:16 AM  10 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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Don't expect night and day. You are flying an OS SX50-H with an MP5. The YS-50 with an MP5 OR Align pipe will produce about the same amount of power. The YS, properly tuned, will give you a more consistent run from full to empty tank simply due to the pressurized fuel feed/regulated fuel flow system of the YS.

You might notice some difference if your existing 50 is a bit on the tired side. You could bring it back to like new performance by simply replacing the ring, honing the cylinder, and perhaps replacing the rear bearing if necessary.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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03-08-2008 03:52 AM  10 years agoPost 3
dennis052

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San Diego, CA, USA

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Thanks for your info. I think I will hold off replacing the OS50 engine. Maybe I use the YS engine for second heli later on.

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03-08-2008 06:02 AM  10 years agoPost 4
ez2bgman

rrElite Veteran

N'awlins, LA

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I have to disagree with dkshema. Both the YS 50ST and OS 50 Hyper make noticeable more power/punch than the non-hyper OS 50 (especially when used with 30% nitro fuel). With a good muffler such as the Align, MP5, Hatori, Funtech, etc. you will find it even more alive. As stated, a huge advantage of the YS 50 over the OS engines is the regulated fuel delivery. You will get consistent fuel delivery throught the entire tank, unlike the common problem of the OS 50's tending to go lean toward the end of the tank.

Gary
Hot Girlz in da gallery

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03-08-2008 07:38 AM  10 years agoPost 5
DS 8717

rrProfessor

Here wishing i was somewhere else

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The YS 50 will have a lot more power than the non Hyper OS.The MP5 is not that great on the OS or YS,The Hatori 522 or Align pipe is much better.I have all these engines and the YS and Hatori 522 is by far the best combo.The carb on the non Hyper is much smaller than the Hyper and doesn't have near the power as the Hyper.DOUG

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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03-08-2008 03:35 PM  10 years agoPost 6
AAKEE

rrApprentice

Boden, Sweden

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Hi !

Dont know so much about different engines, but we are 4 heli flyers with 4 helis of same brand, all using OS50SX-H Hyper and there´s a big difference in power...only thing that it could depend on is the muffler/pipe. I tried the others blades and that wasnt the cause.

My Hyper gives more power. I need to set the throttle curve(normal mode) to 80% at max pitch(we all have 10 degree max) to not get too much head speed..the others have it set to 100% and get about the same HS at maximum climb.

I have a Funtech muffler/pipe...dont remember the number..I guess the thing is to realize how big difference a well designed pipe could make. I dont know the brand of the other muffler/pipes.

One thought could be to get the right pipe and try before changing engine. I guess the new pipe will do the same to the next engine, so the money arent gone for nothing.

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03-09-2008 07:10 PM  10 years agoPost 7
dkshema

rrMaster

Cedar Rapids, IA

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I'm flying an OS 50 SX-H in an EVO with an MP2-50, a YS50-ST with an MP5 in a Caliber 5, and had an OS 50 Hyper in the Caliber prior to swapping it out for the YS.

All running the same fuel. It's my opinion that these "great increases in punch and/or power" are the result of the Placebo effect. You put in a motor expecting more from it, therefore you see it.

The YS runs smoother from full tank to empty tank due to the fuel delivery system. Other than that, all three motors have essentially the same power rating, the same power band, and the same RPM range.

The Hyper is spec'ed to have a whopping 0.1 HP more than the SX motor, a 5% increase. Not a colossal increase by any stretch of the imagination. I've never seen any HP ratings printed anywhere for the YS.

I've read a lot of anecdotal evidence about those great increases in punch or power, but frankly, no one has ever really taken the time to do any real, meaningful experiments, and published any data.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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03-10-2008 01:33 AM  10 years agoPost 8
ez2bgman

rrElite Veteran

N'awlins, LA

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I'm not sure about your engines, but when I was running a standard OS 50 (non-hyper) my normal throttle curve went all the way to 100%. When I switch to the Hyper, I had to lower the normal throttle curve to about 80% on top. The same for my YS 50. I am only running about 80% on the top to maintain a head speed of 1750-1800. That alone is fairly significant. This is using 30% Magnum on all 3 engines.

Both the Hyper and the YS benefit from more torque as well. HP isn't always about peak HP. Torque is a bigger factor, especially when flying 3D. More torque and fast response allows the engine to maintain the chosen rpm and to recover faster as well.

Gary
Hot Girlz in da gallery

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