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09-10-2007 09:10 AM  10 years agoPost 1
pgrbff

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Piemonte, Italy

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I think I've probably just fried the OS32 in my shuttle, (crashed - throttle stuck on high), had to watch whilst she burned herself out, finishing with a short burst of high pitch screaming!

Is there any reason not to replace it with a 37?

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09-10-2007 12:56 PM  10 years agoPost 2
dkshema

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Cedar Rapids, IA

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The only reason would be cost. If you can afford the 37, do it, but realize that for the 37 to develop the power it's capable of, you have to put on a GOOD, high volume muffler.

If you can find an MP2 for the 30 (discontinued), that works well, a Toki 40 muffler works well, and there's a Hatori pipe for the 37 that works great, but then it's expensive.

-----
Dave

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

Team Heliproz

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09-10-2007 02:32 PM  10 years agoPost 3
DJDAZ

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Perth Western​Australia

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Depends on the damage when u open her up.

If it's just a hole in the piston then replace the piston and ring and it's a relatively cheap fix compared to a new 37.

On the other hand, u will prob enjoy the power difference of the bigger motor. I don't know about the muffler differences tho which is an excellent point to consider before updating.

Maybe someone can shed some light on this?

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09-10-2007 03:11 PM  10 years agoPost 4
BarracudaHockey

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Jacksonville FL

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DK is right, it needs a higher volume muffler to produce its best power.

It will be a noticable difference.

The Hatori SAB6RS is the ticket but it aint cheap. Heliproz used to sell a Mavrikk knock off that worked well too.

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

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09-10-2007 04:21 PM  10 years agoPost 5
pgrbff

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Piemonte, Italy

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I had an MP2 on the 32, so should be OK.

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09-10-2007 11:58 PM  10 years agoPost 6
dkshema

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Cedar Rapids, IA

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If this is an ABN version of the 32 SX (a non-ringed version) buying just the piston isn't an option. You buy the piston and cylinder as a pair.

Last time I did this, it was $50 for that combo. I see that Tower now gets close to $60 for that combo.

If your clutch bell went through the engine like mine did a few years back in an EVO crash, you're going to buying a new piston, cylinder, probably a rear bearing and maybe a connecting rod depending upon how much aluminum and dirt your 32 ingested.

I sent my OS 50 back to Hobby services when my clutch went through the motor - crash, couldn't shut down the motor and it proceeded to destroy the clutch bell, liner, and shoes, and much of that was ingested through the carburetor. OS sold me a whole new 50 for about $100 as they would have ended up replacing about everything but the crankcase and head.

A word of advice. Before putting that MP2 on anything else, wash it out. If, like my EVO, the clutch went through the motor, you have all sorts of metal flakes in the muffler. Put that on a new motor, and you'll end up sucking some of those metal particles back into the motor where they not only cause you to flame out (metal on the glow plug), but the metal pieces can hurt the piston/cylinder.

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Dave

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

Team Heliproz

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09-11-2007 04:13 AM  10 years agoPost 7
JeepFan

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Panama City, Florida

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I went with the 37. The extra cost for the engine and that expensive muffler is not worth it in my opinion. Stick with the 32, or upgrade to a 50.

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09-11-2007 05:59 AM  10 years agoPost 8
dkshema

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Cedar Rapids, IA

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Upgrading a Shuttle to a 50 isn't going to happen without buying a whole new heli.

Go for the 37, you have the MP2. Don't look back, the 37 will make that Shuttle come alive.

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Dave

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

Team Heliproz

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09-11-2007 07:05 AM  10 years agoPost 9
pgrbff

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Piemonte, Italy

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Thanks guys.
Haven't taken engine out but clutch bell pretty chewed up. Will know better how much damage done at the weekend.

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09-11-2007 07:40 PM  10 years agoPost 10
pgrbff

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Piemonte, Italy

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Clutch bell and shoe toast!
Engine still turns over by hand.
Is there anything to take into account when removing head?
Is it as simple as removing screws?
I assume I will need a gasket set?

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09-11-2007 10:29 PM  10 years agoPost 11
ZXXflyer

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stone mountain,​georgia, US

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Heck.... put a Weston .36 in it!!!!

Believer in Weston motors!

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09-12-2007 04:42 AM  10 years agoPost 12
DAVE62278

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Ridgetown, Ontario,​Canada

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pgrbff,
I had the OS 32 in my shuttle and moved it to my Evo 30. Because of not changing the clunk line, like I preach to everyone else, I fried my trusty 32, but used this as an chance to up-grade to the OS37 with a hatori 6rs. A great combo, but be prepared for shorter flight times with the 37. There's always a catch!!! I know it's a direct fit for the shuttle motor mount but I think I remember reading about the side frame has to be notched a little for needle on the carb. Maybe someone that is sure about this will post yes or no.

Dave

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09-12-2007 05:10 AM  10 years agoPost 13
dkshema

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Cedar Rapids, IA

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but be prepared for shorter flight times with the 37
That extra HP has to come from somewhere. I switched my Caliber 30s over from the OS 32 to the 37 a few years back. Flight times went from about 30 minutes per tank to about 10.

But the fun more than made up for it.

-----
Dave

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

Team Heliproz

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09-16-2007 09:15 AM  10 years agoPost 14
pgrbff

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Piemonte, Italy

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I've had the head, backplate and carb out and there are no obvious signs of damage. She turns over nicely.
She ran for what seemed like an age, but probably just a minute or two, the clunk had fallen off in the main tank, so I guess she only emptied the header, with main blades stationary, hence melted clutch bell.
Is there a chance she is OK? The couple of second screem as she shut down was blood curdling.
What damage is likely?

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09-17-2007 05:49 AM  10 years agoPost 15
dkshema

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Cedar Rapids, IA

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If you're not using an air filter, and if the engine was running while grinding away the clutch liner and bell, there's a high probability that bits of the bell and liner made their way completely through your motor and out the muffler.

I had a similar thing happen a couple years ago when I didn't get to the crash in time to shut down the motor. When I got there, the motor finally died, but the clutch bell was gone, as were the two clutch shoes (EVO 50). The motor didn't look all that bad, but when I dismantled it, the entire innards were full of what looked like very finely ground coffee mixed with oil and aluminum powder.

I returned the OS 50 to Hobby Sevices along with a note telling them what happened. The response was that it would be cheaper to sell me a new OS 50 for $100 than it would be to replace the crank, bearing, piston, cylinder, wrist pin and ring.

You have to things to look for. First, for glop inside the motor that shouldn't be there -- clutch bell powder and lining powder, and second, take a look at the piston and sleeve, looking for scarring, bits of metal embedded in the piston skirt, and even to see if the side of the piston closest to the exhaust port seems to have a bunch of scoring or a "smeared" appearance.

Take the motor apart and inspect it. This is not rocket science.

-----
Dave

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

Team Heliproz

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09-22-2007 05:05 PM  10 years agoPost 16
pgrbff

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Piemonte, Italy

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Got the 37, certainly not a straight swap on the Shuttle, may just stick with the 32.

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