OS vs. Evolution - RC Groups
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Feb 04, 2007, 11:30 PM
Sayonara
JEB21's Avatar
Discussion

OS vs. Evolution


Getting back into glow after a long hiatus from fuel and I've decided on a plane but I need a powerplant. What is the public consensus as far as OS engines vs. the Evolution? The engines in question are:

OS .55 AX

or

Evolution .52 NX

We're talking about an insignificant extra 12 bucks for the OS...is it the better choice
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Feb 05, 2007, 07:04 AM
WCB
WCB
Registered User
OS puts out a little more power than Evo.
Feb 05, 2007, 08:43 AM
Registered User
celery's Avatar
But what is the weight difference?
Feb 05, 2007, 03:53 PM
WCB
WCB
Registered User
OS 55 AX= 14.25oz. $149.99
Evo 52= 14.5oz. (weight w/o muffler) $129.99
At $20 more I'd buy the OS
Feb 05, 2007, 04:02 PM
Just Plane Going To Heli
Tweener's Avatar
One consideration is the break in period. Evolutions don't need one. Just start it, fine tune it, and fly.
Feb 05, 2007, 04:39 PM
Registered Flyer
The Evo. 46NT is only $89.99.
Feb 05, 2007, 08:39 PM
WCB
WCB
Registered User
By the time it takes to remove the needle valve limiter on the Evo(which I highly recommend you do) you could have your OS broke in.

*As a side note....they say Evo's are broken in at the factory but that is not the case. I've owned 3 (.36, .46 and .61) and seen a bunch and none were completely broken in when new.
Feb 05, 2007, 08:51 PM
Registered User
tailskid2's Avatar
I personally think Evolution engines are giving OS a run for the money ....and the winner is: THE MODELER...both are great running engines!
Feb 05, 2007, 10:07 PM
Sayonara
JEB21's Avatar
I've seen great write ups on both and the consensus seems to say OS has the better power output. I'll probaly go with the OS, they've got a long proven track record.

"funtanas" I'm wanting a bit more power than the .46 thats why I'm going with one of the 50's. Same size as a 40 but with more brute force!
Feb 06, 2007, 10:53 PM
Registered User
Go For The Os Os Os Os You Will Never Have The Problems That Follow Evo. Oh They Run Good For A While Then Like Magic Problems Occur. That Won,t Happen With The Os Os Os Os Os Here Me Now Believe Me Later!
Feb 07, 2007, 12:30 AM
Sayonara
JEB21's Avatar
Bought the OS .55 AX today. Looking forward to seeing the performance soon!
Feb 07, 2007, 12:54 PM
I'll try anything once!
thacherd's Avatar
As an OS and an Evolution user I am on the fence about this one. All of my Evo .46's have run like a drem, while my OS AX .46's are 50/50. I have one AX on a trainer for my son that is nothing but rock solid, yet I cannot get the .46 AX on my Slow poke to not bog down when going from mid throttle to high throttle while airborn. My Evo 1.00's are great engines and have run much better than my OS .91. My Evo .40 is great, but so is my OS .40 LA (which is alot less powerful due to the design of the engine). I guess what I am saying is that you can have trouble with any engine, or have success with any engine, regardless of the brand name stamped on it. I have yet to have issues with the Evolution engine though, and will probably purchase them over the OS just because of the lower cost. Now, I just wish Evolution made a 1.60 sized glow engine...
Feb 07, 2007, 08:46 PM
Canucklehead
orenda635's Avatar
Quote:
Originally Posted by WCB
*As a side note....they say Evo's are broken in at the factory but that is not the case. I've owned 3 (.36, .46 and .61) and seen a bunch and none were completely broken in when new.
I agree. My 46NT was so tight, it was actually squeaking on startup for the first couple of tanks.

I'd have to say that both OS and Evolution are both excellent engines in their own right. Evolution engines are very user friendly. Both are smooth running, reliable, and easy to start. You can't go wrong with either.
Feb 07, 2007, 09:57 PM
Registered User
My engine supplier recently informed me that the OS 50 has been withdrawn owing to piston problems, (not specified) guess I will stick with my three 46; one of which been running for nearly five years now and still a good engine.
Feb 07, 2007, 11:25 PM
Sayonara
JEB21's Avatar
Quote:
Originally Posted by macboffin
My engine supplier recently informed me that the OS 50 has been withdrawn owing to piston problems, (not specified) guess I will stick with my three 46; one of which been running for nearly five years now and still a good engine.
My local hobby store told me the same thing about the now defunct 50. They also mentioned that the .46 may be phased out in the near future with the 55AX being the replacement???

It was a few extra bucks going with the .55 over the .46 so I hope the decision was the right one.


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