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HelicopterEngines Plugs Mufflers Fuel › Difference between hyper50 and plain ol 50??
08-07-2007 01:16 AM  10 years agoPost 1
Raptor3DPilot

rrKey Veteran

North Las Vegas, NV

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Are the only differences between a Hyper and a standard OS50 the carb and the head? What's different about the head besides being blue?

Remember when flying inverted that down is up and up is EXPENSIVE!

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08-07-2007 01:23 AM  10 years agoPost 2
DS 8717

rrProfessor

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The piston on the hyper is different,it has been lightened and it makes them weak.

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

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08-07-2007 01:25 AM  10 years agoPost 3
Raptor3DPilot

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North Las Vegas, NV

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I have a standard SX-H... but I'm in need of a new carb... should I go with the 40 or the 60 carb?? If I go for the 60 carb do I need to upgrade the head?

Remember when flying inverted that down is up and up is EXPENSIVE!

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08-07-2007 01:31 AM  10 years agoPost 4
DS 8717

rrProfessor

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The 60 carb will give it more power,the hyper might help it run a little cooler.

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

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08-07-2007 05:14 AM  10 years agoPost 5
PietervA

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New Zealand

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OSengines.com lists the piston for both the 50 SX-H (discontinued) & 50 SH-H Hyper as manufacturer number 25203200. No difference in lightness, strength, metal or whatever, just the plain ol' same

Recognisable difference between the 2 is the carb (40 vs 60 series) and the head with its larger fin area. AFAIK, the compression ratio, and hence combustion chamber size is identical.

I've found the power output pretty much identical too, running both with 60B carbs. Indeed the carb is the most significant power-booster here.

Any other thoughts?

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08-07-2007 06:02 AM  10 years agoPost 6
majorheli

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Stow, MA

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The old OS-50SX is not really very good in the mid-range. That is why they have a new carb on the Hyper.

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08-07-2007 07:46 AM  10 years agoPost 7
PietervA

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New Zealand

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That may well be true, but the difference is in the carb, not the rest of the engine.

Some of us have been running 60B carbs on SX-Hs (straight & Hyper) for the very reason you mention. At the time that both engines were available, you'd often as not buy the Hyper for its carb, as the 60Bs were US$80-100 each.

(Of course big, blue & shiny must be better, I know)

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08-07-2007 12:02 PM  10 years agoPost 8
DS 8717

rrProfessor

Here wishing i was​somewhere else

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OSengines.com lists the piston for both the 50 SX-H (discontinued) & 50 SH-H Hyper as manufacturer number 25203200. No difference in lightness, strength, metal or whatever, just the plain ol' same
If you have an SX that has not had the piston replaced,it is different.I know i have one.

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

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08-07-2007 03:19 PM  10 years agoPost 9
BarracudaHockey

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Jacksonville FL

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Grudgingly I'll admit that Mr10x is correct.

They didnt change the part number but they changed the way they machined them at some point. I have 2 older 50's and they both have the full thickness piston. The replacments, and every hyper I've taken apart, the top of the piston is milled out from the bottom. For balance I suppose or more power from less inertia?

Andy
AMA 77227
http://www.jaxrc.com

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08-08-2007 12:02 AM  10 years agoPost 10
PietervA

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New Zealand

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Accepted.

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08-08-2007 03:25 PM  10 years agoPost 11
BarracudaHockey

rrMaster

Jacksonville FL

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I figured I'd save him tearing apart a couple engines to take pictures to prove he was right

Andy
AMA 77227
http://www.jaxrc.com

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