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HelicopterBeginners Corner › Ringed vs Non-Ringed ?
05-05-2005 01:26 AM  12 years agoPost 1
bjazi01

rrNovice

Plainfield, IN

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Can someone please explain to me the difference between OS .32 SX-HX Ringed and the OS .32 SX-H Non-Ringed ?

Thanks

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05-05-2005 01:30 AM  12 years agoPost 2
C-DOG

rrVeteran

SunShineState

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the ringed has a piston ring
obviously the non ringed does not.The non ringed piston and cylinder are alot tighter fit to acquire propper compression.Non ringed I believe has a little more power,but the ringed will last longer.

Good Luck Corey I PAY-PAL

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05-05-2005 02:38 AM  12 years agoPost 3
Leif

rrElite Veteran

USA

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Performance-wise, there's very little difference between the ringed and non-ringed versions of the OS32-SXH. The ringed engine requires slightly more careful break-in, but will probably last longer if properly broken in.

BTW, the OS 32-SX HX is the ringed version of this engine with a PULL START. Unless you want to drag around the extra weight of a pull-start system, you're better off with the SX-H models.

Leif

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05-05-2005 03:16 AM  12 years agoPost 4
Ted Toth

rrElite Veteran

Myrtle Beach S.C.

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for me the ringed engines are my first choice
just run them rich and after a gallon start leaning a little at
a time, then they keep getting stronger
non ringed engines need to get hot to seat properly
this can be tricky to the newbie to hot and damage may occur
most agree that the no ringed have a slight power advantage
the new OS 37 is one of the best starting and running engines
I have ever owned and it is ringed

,

You don't stop laughing because you grow old, you grow old because you stopped laughing.

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05-05-2005 02:41 PM  12 years agoPost 5
airdodger

rrElite Veteran

Johnston USA

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I have an SFN no ring, since around 91, hunderds of hours, still very powerful. I think an abc type engine will far outlast a ringed, and surely have more grunt. Chris

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05-05-2005 03:33 PM  12 years agoPost 6
dtm360

rrApprentice

HKG

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I would second what airdodger said. Just look at the RC car engines 1.5hp 41,000rpm out of a 2.11cc engine. Makes the heli 50s look like underpowered pre-historical animals and these are all ABC non-ringed beast. And believe me if those RC car guys reckon they can get more power from ringed engines they would have done that ages ago.

Of course the obvious difference is engine stability which the heli engines win x10!

Before I even started my new TT39 engine I was shocked at the amount of compression leakage past the piston rings. Had it been one of my NovaRossi car engines I would have thrown it away ages ago! Of course, this was heli...so it was fine!

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05-05-2005 04:22 PM  12 years agoPost 7
nivlek

rrProfessor

Norfolk England

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I don't think that I've ever worn out an ABC engine , but I have worn out rings . I would go for an ABC type engine over a ringed one everyday of the week .

At the end of the day , it gets dark .

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05-05-2005 04:51 PM  12 years agoPost 8
deafheliflyer

rrKey Veteran

Arizona

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ringed
If ringed gets more power then all we would do is change the piston ring every ten gallons of fuel...

Hmmmmmm

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