RunRyder RC
WATCH
 1 page 1359 views POST REPLY
HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › Piston ring breaks in flight........
02-04-2008 07:17 AM  10 years agoPost 1
MolokaiBoy

rrKey Veteran

Lahaina, Maui,Hawaii USA

My Posts: All  Forum  Topic

My OS Hyper took a dump on me today at the field. Has anyone had there piston ring just break in flight and still manage not to damage much on the engine? As you can see from the pics the engine is pretty much in a like new state minus recent damage from today. This engines has only had approximately 40-50 flights and has been taken cared of. It's never run lean. And it's very clean.

I know OS won't pay for damages caused to my heli, and I don't expect them too, but do you think they would atleast repair or replace my engine?

Les
Maui RC Modeler's, Big Island RC Helis, http://www.facebook.com/mauirc

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-04-2008 10:54 AM  10 years agoPost 2
v58 fuy

rrVeteran

UK - Kent

My Posts: All  Forum  Topic

I recently had a very similar thing happen to my Hyper, 2 small sections of the ring broke off and damaged the piston in the process.

Took it back to my local shop, who in turn sent it back to Ripmax - who kindly replaced the piston, ring, and liner FOC. So I don't know if OS have had ring problems?

I've now got the TT 53 Redline, as I had nothing to fly for a few weeks and needed to get back in the air.

David

PM  EMAIL  GALLERY  Attn:RR  Quote
02-04-2008 10:56 AM  10 years agoPost 3
HeliPhil

rrApprentice

Brentwood, Essex, UK

My Posts: All  Forum  Topic

AFAIK the piston ring is slightly too long which causes the above problem. I have taken 0.2mm off mine with a stone after exactly the same ting happened to me.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-04-2008 12:49 PM  10 years agoPost 4
Chook

rrApprentice

Esperance Western Australia

My Posts: All  Forum  Topic

I'm on the 3rd piston and ring on my high time hyper 50 and bearings are replaced at the same time. The liner is original and has survived both piston rings knocking the lip off the pistons and piting the head slightly. I just lapped the liner with wet and dry (wet)and rebuilt it. The pitting in the head is only minor and wont worry it. I did file a small amount of the larger end off the ring to give it slightly more clearance to expand in the first rebuild but I couldn't tell if it resulted in less damage when it failed. Both rings failed in a hover and the motor continued to run. The first time I didn't know what the different exhaust note was and landed. The motor couldn't be restarted as there wasn't enough compression. When you consider how many times the piston comes to a complete stop and reverses it's travel per second it holds up pretty well really.

PM  EMAIL  GALLERY  Attn:RR  Quote
02-05-2008 04:20 PM  10 years agoPost 5
MolokaiBoy

rrKey Veteran

Lahaina, Maui,Hawaii USA

My Posts: All  Forum  Topic

Thanks for the info guys. I'm gonna write OS and see if they woould send me a replacement Piston, ring, and maybe a liner if possible.

Les
Maui RC Modeler's, Big Island RC Helis, http://www.facebook.com/mauirc

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-06-2008 03:48 AM  10 years agoPost 6
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

If you have a dated sales receipt that shows you purchased that OS within the last two years, ship it to Hobby Services, they'll most likely fix it under warranty. You'll be out the cost of shipping.

-----
Dave

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

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
02-06-2008 07:01 AM  10 years agoPost 7
MolokaiBoy

rrKey Veteran

Lahaina, Maui,Hawaii USA

My Posts: All  Forum  Topic

sounds like a good idea, i'll do that.

Les
Maui RC Modeler's, Big Island RC Helis, http://www.facebook.com/mauirc

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-19-2008 07:19 AM  10 years agoPost 8
Kader

rrApprentice

Czech Republic

My Posts: All  Forum  Topic

Hi,
Are you sure, that your hyper donť run lean ?
The plug coil is typical frosted on the right foto - the coil have a white frosted type of look to it instead of the shiny metallic look. I think, this is a sign of running too lean.

JAN

PM  EMAIL  GALLERY  Attn:RR  Quote
02-19-2008 07:49 AM  10 years agoPost 9
Kona Chopper

rrKey Veteran

Kailua-Kona, Hawaii USA

My Posts: All  Forum  Topic

I think MolokaiBoy is a little hard on these nitro motors. Better he leaves these Nitro motors to the Men and go fly the electrics with the Boys. jus kidding of course..EZ made me say that.



Why buy?? when you can borrow and no return

PM  EMAIL  GALLERY  Attn:RR  Quote
02-20-2008 08:16 AM  10 years agoPost 10
MolokaiBoy

rrKey Veteran

Lahaina, Maui,Hawaii USA

My Posts: All  Forum  Topic

Well the way the two of you guys (EZ and Kona) fly it's amazing you guys still call yourselves heli pilots hahahaha

I mean you guys spend more time cleaning it and getting them all dolled up, they look too good to actually fly hehehe

BTW I got some great news regarding our FunFly

Les
Maui RC Modeler's, Big Island RC Helis, http://www.facebook.com/mauirc

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
02-22-2008 02:50 AM  10 years agoPost 11
ultra2

rrNovice

Missouri

My Posts: All  Forum  Topic

...and the piston land that broke off was at the "front" of the piston. I'm not familiar with the OS hyper, but curious where the ring locating pin is on the piston. Any chance of debris? ..not to discredit the lean run theory..

PM  EMAIL  GALLERY  Attn:RR  Quote
03-13-2008 05:38 PM  10 years agoPost 12
MolokaiBoy

rrKey Veteran

Lahaina, Maui,Hawaii USA

My Posts: All  Forum  Topic

Well sent it in and got a replacement Hyper FOC in about a week.

Gotta love the great customer support from OS

Les
Maui RC Modeler's, Big Island RC Helis, http://www.facebook.com/mauirc

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
03-14-2008 08:40 PM  10 years agoPost 13
helikopeter

rrNovice

stockholm , sweden

My Posts: All  Forum  Topic

well guys , today I flew my raptor for the first time in several months, and right after starting it, I got quite surprised that the engine couldn´t hold the usually 450rpm at idle , so I had to increase it significantly, then I started flying as I normally do, some tic tocs, flips, piro flips and inverted hovering, but the engine sounded quite weird , I just thought it was some problem with new clutch , because it had some strange metallic sound , then I tried an auto, and the engine just quit right after I hit the throttle hold , I thought that it was something in the carburetor, but then when I get home and removed the engine, to my surprise, the piston ring had broken , the cylinder was completely destroyed on the upper part, and the combustion chamber is severely pitted , so I think that is cheaper to simply buy a new engine, this hyper was around 3 years old, with relatively low use ,last year I replaced the original bearings with ceramic ones, and to my surprise, i got a nice power increase and even lower rpm at idle. The fuel I use is 25% nitro and 16% synthetic oil.

PM  EMAIL  GALLERY  Attn:RR  Quote
03-15-2008 05:01 AM  10 years agoPost 14
patriot21

rrKey Veteran

Byron,MN

My Posts: All  Forum  Topic

had the same thing happen to my hyper... it was almost 2 years old...i sent it in to see what they can do..... about a week later i was breaking in a brand new hyper!!!they back their warranties

My Sponsor:VISA

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1359 views POST REPLY
HomeRC & PowerAircraftHelicopterEngines Plugs Mufflers Fuel › Piston ring breaks in flight........
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Wednesday, December 12 - 2:44 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online