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02-22-2010 10:53 PM  10 years ago
Topic Vote0Post 1
Wingman77

rrProfessor

Pulaski Tennessee

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os 55 durability??
has anyone ever put more than 30 gallons through an os 55 and not had issues with it? also how many people have had serious issues out of them before hitting this mark?
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02-22-2010 11:14 PM  10 years ago
AaronJohnson

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mason,MI

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Mine broke the wrist pin clip on the 34th flight. They warrantied it and it has been good since for 1.5 gallons. Thats said it is a great running engine, good power easy to tune and good on fuel. I have got a YS 56SR in my other nitro and lets just say next time I get a new engine it will be the 56SR. The YS is 10 times more consistent and super easy to tune (I have had YS before this though so I am familier with them), it seems to recover better when loaded hard then the 55HZ does. Just my .02
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02-23-2010 12:46 AM  10 years ago
Wingman77

rrProfessor

Pulaski Tennessee

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wow, that is good info, also what fuel are you running and which pipes?
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02-23-2010 12:57 AM  10 years ago
brcg123

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Wagoner OK USA

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Less than two gallons on my OS55 and down she went. and I made them sooo mad at Hobbico for voicing my opinion, if my engine was pouring liquid metal out of the top of it, they wouldnt replace it now. LMAO!! Its now fixed, it cost me another 100.00 bucks, I use the align pipe with mine, plenty of power, but, I feel the next issue we will have is gonna be the rear bearings again on this engine, just like the 50 hyper series. They already replaced my rear bearing at less than two gallons through it. Its the same quality of bearings that they have alway used, just another ball added to it.






Trex700N, Trex600N, Raptor70, RaptorTitan, GMPCrickett, Visa
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02-23-2010 01:03 AM  10 years ago
Wingman77

rrProfessor

Pulaski Tennessee

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things are not sounding so great for the os 55
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02-23-2010 03:44 AM  10 years ago
AaronJohnson

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mason,MI

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Dont get me wrong, The 55HZ is a great engine. I just prefer the YS56 over it (consistency), the 56SR just seems to have a little more "grunt". My YS56 is making its power at a 30 degree cooler temp then the OS also.

BTW I am using a Hatori SAB-56 on the 55HZ with a OS #8 and a Outrage 56 pipe on the 56SR with a enya 3. Wildcat CY 30% fuel for both.
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02-23-2010 03:20 PM  10 years ago
Jgatorman

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Birmingham, AL

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What are you flying your YS56 in and what is the actual temp, also where are you measuring temp?
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02-23-2010 03:22 PM  10 years ago
AaronJohnson

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mason,MI

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YS is in my Velocity I measure the temp on the back of the block just below the head on all my engines. Actual temp on the YS56 so far has been around 155-165F. The 55HZ I am seeing around 185-195F.
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02-23-2010 03:23 PM  10 years ago
Jgatorman

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Birmingham, AL

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and temp was?????????
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02-23-2010 03:24 PM  10 years ago
AaronJohnson

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mason,MI

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I edited it...
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02-23-2010 03:32 PM  10 years ago
Jgatorman

rrVeteran

Birmingham, AL

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Thanks, as you can see I am very curious about the 2 new engines 55 & 56 I am just looking to make the most informed decission possible for my first nitro. (Just got JR vibe 50 frame). My field fly's OS and feels that is the direction I should take. However I am inclined at this point to go with YS56. Any info in this matter is greatly appreciated.
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02-23-2010 04:21 PM  10 years ago
brcg123

rrKey Veteran

Wagoner OK USA

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Thanks, as you can see I am very curious about the 2 new engines 55 & 56 I am just looking to make the most informed decission possible for my first nitro. (Just got JR vibe 50 frame). My field fly's OS and feels that is the direction I should take. However I am inclined at this point to go with YS56. Any info in this matter is greatly appreciated.
If I may ask, whats leaning you towards the YS, if everyone around your field is flying OS?







Trex700N, Trex600N, Raptor70, RaptorTitan, GMPCrickett, Visa
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02-23-2010 04:44 PM  10 years ago
Jgatorman

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Birmingham, AL

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Os seems to go through bearing every 4 gallons, Terrible customer service, issues such as yours, and I have not seen a 56 for sale used, and os55 seem to be readily available used in classified's. The negatives I have heard on on Ys, difficult to tune, harder to locate parts. So I am inclined towards YS also better fuel pressure system (crankcase vs pipe)
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02-23-2010 06:03 PM  10 years ago
brcg123

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Wagoner OK USA

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I have to admit that I agree with you on most of those, its just been the rule of thumb to follow along with the crowd on heli's being used, and following those with the information around us, but, I have to agree with your persuit angle being used here. Im an OS guy, but just because yor dad was a Chevy man, instead of a Ford man, doesnt mean your gonna own a Ford thses days....






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02-25-2010 02:06 PM  10 years ago
Jgatorman

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Birmingham, AL

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Fellow Ryders Lets keep this discussion going! I am looking for data to make engine decission.
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02-25-2010 09:11 PM  10 years ago
JeffKollin

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Jenison, MI

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Well then you might to wait for the release of the new RL-56 to see how it compares.
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02-25-2010 11:58 PM  10 years ago
TMoore

rrMaster

Cookeville, TN

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There is nothing wrong with the OS55. Everyones experience is different so take it with a grain of salt. My 55 has run flawlessly and is running extremely well right now as are the 91HZ's, the 91 CSpec's and the 50 Hypers that I have.

Some folks have issues, you can try and blame it on the engine, the importer, the weather, the fuel or whatever you want but the real variable is the nut at the end of the stick.

Some folks shouldn't be using engines that run on fuel, that's why there are electrics.

TM
Part 107.
The only ZERO flight hour certificate in the world.
It's like getting a driver's license without the driver's test.
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02-26-2010 01:09 AM  10 years ago
Jgatorman

rrVeteran

Birmingham, AL

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I think your statement would hold more weight if OS was not already changing rear bearing and the same issues were not occuring time and time again. That being said I am no saying OS makes a bad engine however these issues seem to be consistant in only OS .50 and .55 motors. I say this because after spending more time than I care to admit on the engine forums on RR and HF these specific issues are not occuring with YS .56 or NR.57 motors. So according to your theory only smart knowledgable people purchase YS and NR and the people that should not be flying internal combustion motors only buy OS. This is unless I am missing something which I absolutely might be for I have yet to own a nitro motor.
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02-26-2010 01:29 AM  10 years ago
Dr.Don

rrVeteran

Cedar Park, TX -- USA

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I have owned both YS and OS in the 91 and 50 sizes, but neither of the current 55/56 engines. I will note that YS and OS take quite different approaches to the design of their 3-needle carbs, so the tuning process will be different. On an OS you typically get the high needle where you want it and then tweak the mid. On a YS it is critical to get the mid needle right, then tweak the high. Both work well, but they are different.

If this is your first nitro, there will be some value to owning what the people around you know how to tune.
Dr.Don
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02-26-2010 02:41 AM  10 years ago
TMoore

rrMaster

Cookeville, TN

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I think your statement would hold more weight if OS was not already changing rear bearing and the same issues were not occuring time and time again. That being said I am no saying OS makes a bad engine however these issues seem to be consistant in only OS .50 and .55 motors. I say this because after spending more time than I care to admit on the engine forums on RR and HF these specific issues are not occuring with YS .56 or NR.57 motors. So according to your theory only smart knowledgable people purchase YS and NR and the people that should not be flying internal combustion motors only buy OS. This is unless I am missing something which I absolutely might be for I have yet to own a nitro motor.
Really? Hold more weight, the facts aren't enough? Let's be clear about the issue. OS makes so many more engines than YS and NR combined when it comes to the helicopter market alone that comparing the number of bearing failures between the brands is meaningless. The fact is that you can ruin a YS or NR engine just as fast as an OS if you don't know how to tune the engine for the conditions that you are using it in. I see it all the time at FF's and events all over the country.

The OS 55 is just as durable and powerfull as any engine of comparable size. The YS and NR engines are good too but saying that these two brands don't have bearing issues is nonsense, they all wear out bearings, that's just a fact. How you tune and handle the engine in combination with the fuel you run and what environment you store the engine are the determining factors to bearing longevity. More bearings are lost to rust than get pounded into oblivion.

TM
Part 107.
The only ZERO flight hour certificate in the world.
It's like getting a driver's license without the driver's test.
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