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HelicopterAudacity Models P6 Pantera - Tiger 50 › Received my new Pantera today
guntube

Senior Heliman

Marietta Ga.

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More follow up on the evolution .52 heli engine.

After gathering as much information as possible on the evolution .52, I decided to totally disassemble carb and crank case and compare it to my .52 air engine. This is what I found.

The carb is exactly the same as the air engine. Disassembling the throttle extension reveiled that the low speed needle adjustment is no more than an "extention rod" contained in an aluminum housing.

The engine is simply a ringed version of the .52 airplane engine with a larger head.

There for, the engine will not tune with a rich mixture for mid to high end torque.

I have tried it with 15% and 30% fuel.

The result is an Un-tunable engine for helicopter use.

Putting divots in the earth the hard way!

01-10-2017 02:50 PM
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MartyH

rrProfessor

USA

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Sorry about the Evo engine. I wouldn't have ever considered it myself but I can see how one could when you consider Horizon is behind them. Unfortunately they were all about MDS too. Remember them? I was the victim of a couple of those MDS failures (in aircraft). Anyway, you could probably pull that Evo 52 and use it for an aircraft engine. You said you've had great service from them in that use. Get an OS engine or the private branded Align version and put all this trouble behind you. Unless you are the type that has to have the latest and greatest, you can pickup a nice OS50 for next to nothing. The Hyper 50 is next and then the current OS55's. All would serve you well.

01-19-2017 01:20 PM
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guntube

Senior Heliman

Marietta Ga.

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I had an mds years ago. A great plank engine with 5% nitro, three head shims and a 4 stroke plug. (Maybe a fox idle bar I can't remember). Sadly evolution has just stuck a big head on this thing and called it a "heli" engine. As a matter of fact the only way I got the low end to hold a setting was to use the needle out of my .52 air engine. Too bad really. Great engine with an 11/7 prop on it, and built like a tank with big bearings, and heavy crankcase casting, just not built for heli use.

Putting divots in the earth the hard way!

01-19-2017 06:04 PM
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MartyH

rrProfessor

USA

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It's not the first company to slap a head on an aircraft engine and call it a heli engine. I've had the OS32, 37,50, 50hyper,several 61's , the 70 and 91 and they all behave like they're supposed to. I don't mean to sound like a commercial for OS and I am definitely one that likes to walk the path less traveled like with my Cox Conquest 15s, Brat 25s & 28s, the Mecoa 46, Megetech M46, the RJL61 as examples. In heli's, it's nothing but OS engines, OS #8 plugs and 15% Wildcat Heli fuel for me.

01-24-2017 06:52 PM
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slickporsche

Veteran

American/Philippines

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MartyH

Yeah, I remember in the early days, OS, plus many others slapped a big head on an engine, and called it good. However, I have had good luck with Super Tiger, and Enya in Helis. The Super Tiger does have a really good carb though.

I think a lot of it has to do with what you expect from your helicopter, and your level of experience. What I mean is the type of flying you intend to do, and what it demands of the engine helicopter combo.

01-25-2017 06:27 AM
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HelicopterAudacity Models P6 Pantera - Tiger 50 › Received my new Pantera today
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