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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › 55HZ Kaboom!
01-23-2010 09:38 PM  8 years agoPost 1
AaronJohnson

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mason,MI

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Flying the 55HZ today, has around 32 flights on it. Motor has been running great, awesome power sounds good, temp right at 200. Checked the glow plug yesterday and it looked brand new. 1st flight today I was near the end of the flight doin low side tic-tocs and the engine was just singing along like it was hovering then it "puked"! Kinda died right off so I leveled it out, fliped into normal and landed then she quit. Engine had no compression and a nasty "bump" at TDC. Took it apart at home it it sure looks like part of the clip for the wrist pin broke and it tore the motor up. Piston, sleeve, head, and ring. I took it apart to make sure I didnt burn it up (which I was sure I hadn't) I will be putting it back together and sending it in for a replacement. Here is some carnage shots of the piston. Its ugly.

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01-23-2010 11:37 PM  8 years agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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It happens. I had an OS 50 Hyper that puked this summer...

-----
Dave

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

Team Heliproz

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01-23-2010 11:40 PM  8 years agoPost 3
AaronJohnson

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mason,MI

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Did they warranty your engine? I just bought mine in December.

EDIT: Oopss, I thought you said it was a new engine.

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01-24-2010 03:39 AM  8 years agoPost 4
helidevil

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Brunswick, ME

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WHOW!!!didn't see that commin'!!

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01-24-2010 04:03 AM  8 years agoPost 5
AaronJohnson

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mason,MI

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Me either!

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01-24-2010 02:04 PM  8 years agoPost 6
Leif

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USA

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Warranty
I wonder if Hobby Services will admit this to be a defect in material or workmanship, or if you will be blown off like the last guy who had an OS55 self-destruct:

https://rc.runryder.com/t557014p1/

Fortunately in this case you have evidence that it was the wrist pin clip that came apart.

Leif

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01-24-2010 02:53 PM  8 years agoPost 7
S76 Mech

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Hatboro, Pa.

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I find it a travesty that HS's can be so 'selective' when it comes to determining what 'is or isn't' covered by the OS warranty.

Gaui Greatness X7, X5, NX4, X3

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01-24-2010 04:45 PM  8 years agoPost 8
fla heli boy

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cape coral, florida

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yeah good luck with a warranty claim. Were you at my dads place???
He said you're really progressing.

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01-24-2010 07:46 PM  8 years agoPost 9
CoronaL

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Winnebago IL

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ouch
part of the rings missing too
hope it works out for you with the Warranty

Randy!!! I am the liquor

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01-24-2010 10:55 PM  8 years agoPost 10
AaronJohnson

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mason,MI

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fla helboy, I was at a different field when it happened (CARDS) and YES! I have been burning a crap load of fuel and having a blast!

CoronaL Yes, that part of the ring got ripped out by one of the exhaust ports in the sleeve. No doubt from when the ring got jammed up in the piston when the piece of wristpin clip broke. I will be calling them tommorow. I hope they dont screw me. This is so obvious that it is a defect, there even is a piece of the wristpin clip imbedded into the cylinder head and it is obviously missing from one side of the wristpin. I defintaly did not run this lean which you can tell by how great the piston looks. (or looked) LOL

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01-24-2010 11:03 PM  8 years agoPost 11
ShuRugal

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Killeen, TX

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hehe, seing as how this is the second thread (third?) on thise type of failure with the 55 to show on this forum, i have a sneaking suspicion that YS and nova-rossi are gonna be getting more business in the near future, especially if HS denies you warranty coverage...

AMA 700159

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01-24-2010 11:03 PM  8 years agoPost 12
CoronaL

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Winnebago IL

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well report back. There have been a few warranty denials. But I agree with you about what happened and IF they did deny this, it would be the cous de gras on their little puppet show over at Hobby Services.

Randy!!! I am the liquor

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01-24-2010 11:08 PM  8 years agoPost 13
AaronJohnson

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mason,MI

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I am not saying anything yet, Will have to see what happens. I love OS engines but I also have had great luck with YS. I know that they get a lot of engines back that people messed up by running lean and that is why there is so many reports of warranty denials. I am hoping they accept the obvious here and replace my engine. I am not stupid and fairly mechanically inclined (mechanic) and I know how to look for a root cause with a failed engine/transmission. I dont think they will tell me that I am denied in this case because it is so obvious. I will keep this thread updated as it wont take long for them to get my engine, they are only a little ways from me here in MI.

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01-25-2010 12:04 AM  8 years agoPost 14
tasmanian devil

rrApprentice

DeSoto,Tx.

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Subscribed.Gonna watch this one.

I do'nt crash,I just rearrange parts.

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01-25-2010 12:49 AM  8 years agoPost 15
dkshema

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Cedar Rapids, IA

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For the record, mine was way out of warranty, I bought the parts, fixed it, and am flying it again.

With respect to Hobby Services and warranty, in the past, they have done quite well by me, repairing motors with blown con rods under warranty, and even replacing an OS 50 SX-H at cost when it ingested most of a clutch lining, clutch bell, and dirt while doing the funky chicken in a corn field before I could get to it and yank the fuel line.

-----
Dave

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

Team Heliproz

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01-25-2010 02:32 AM  8 years agoPost 16
Gearhead

rrMaster

Vt

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well I tell-yeaa, my next 50-55 size engine will be the Webra 55,, but I hope to be able to mount the OS Carb on it

Jim
Buzz Buzz Buzz

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01-25-2010 03:58 AM  8 years agoPost 17
brcg123

rrKey Veteran

Wagoner OK USA

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Uh Oh!! All I can say is if they warranty yours, then I should be getting mine replaced also. Im the guy that was recently blown off by Hobbico because they said mine sucked something into the carb and thru the engine, NOT COVERED!! I have the exact same damage, in the exact same spot going up the side of the piston, through the ring and into the top of the head. They just now sent mine back to me, I waited for almost three months to get mine back from them. They replaced almost everything inside of it, and it still wont run! The only thing that I sent it in for, was because I couldnt get it to start unless I put the throttle trim to the top, and then it would start and run, as soon as I bring the trim down, it died, and still does. I had my engine for three weeks and this happened to it, and the warranty was denied. they will say that you did something wrong, and if they dont, then I have another claim with them!!! Am I the only one that thinks this is really strange, the same damage, the same spot, and all of the coincidences involved here???? If I sucked something into my engine, then how could I possible have the same damage this engine does, if this one has it from a pin sucked through it. They will say that something was sucked into the carb, and it broke the pin, cause the damage is too extensive to be from just a pin being sucked into it.








Trex700N, Trex600N, Raptor70, RaptorTitan, GMPCrickett, Visa

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01-25-2010 04:21 AM  8 years agoPost 18
AaronJohnson

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mason,MI

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Did your 55 have a broken wristpin clip? Didnt see anything mentioned about a broken clip in your thread.

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01-25-2010 04:38 AM  8 years agoPost 19
brcg123

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Wagoner OK USA

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no, mine were still intact, but the trail yours has goes from the bottom to the top, and thru the clip on its way to the top. I can promise you they will say that trash from the outside went thru the carb and into the intake, going up the side of the engine and taking some of the clip with it as it went by it, then to the head. The trail is to big to be from a piece of clip. Sorry, but on mine, the damage was almost the same as yours, except it was on the other side of the piston, in line with an intake hole, as yours is also. my damage was from the wrist pin hole, to the top of the piston, where it melted to the top of the piston, and the underside of the head. the trail that was left on mine looked just like it was machined into it, and it looks like yours is wider and less defined as mine was, yet very much the same damage. I pleaded with them to give me the benefit of the doubt, and they were very convinced of their findings, not their fault.








Trex700N, Trex600N, Raptor70, RaptorTitan, GMPCrickett, Visa

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01-25-2010 04:48 AM  8 years agoPost 20
AaronJohnson

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mason,MI

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We will see.

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