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Evolution Petrol Engines

Petrol Powered Engines

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John 'JB' Seal30/01/2013 11:11:15
13 forum posts
1 photos

Hi all, I thought I'd start this thread to discuss Evolution Petrol Engines and their capabilities.

I've been looking at the Gas/Petrol powered EVOE10GX (10cc) as an investment for the near future to power my Chris Foss Acrowot...it says that the engine is suitable for .46-.60 size models so I would think this will be ok, right? The spec says it produces 1.68HP @ 16,400RPM.

http://www.evolutionengines.com/Products/Default.aspx?ProdID=EVOE10GX

Does anyone own an Evolution Petrol Engine and if so what are they like? Are there any issues/problems with the engines or components within them?

Obviously there are more expensive petrol engines like Saito and OS available but in terms of price I think these engines seem to be really good value?

 

JB

Edited By John 'JB' Seal on 30/01/2013 11:13:02

Frank Skilbeck30/01/2013 11:44:36
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4749 forum posts
104 photos

I saw one for the first time (still in box) last week and it looks really nice. The write ups on the American forums are very positive, just bear in mind that it is about the same power as a 52 2s glow or 75 4s.

Bob Cotsford30/01/2013 12:35:56
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8627 forum posts
483 photos

I've got one, bought from Kings Lynn Models, but so far I haven't got beyond running a couple of tankfulls through it on the ground.

It's a nicely made unit and comes with everything you need except the petrol proof bung for yout fuel tank. In the package were: a small ignition module with integrated tacho output, HT lead and plug cap, spark plug, felt clunk, in-line filter, protective wrap for the leads, silencer, allen keys and a length of viton fuel tube.

I've put it in a 46 size BH Extra to try it using 6oz tank and a 2S LiFe pack for the ignition but the weather has put a damper on any thoughts of flying it.

For the first run on an 11*5 APC it started easily and ran at a nice rich two stroke for around 12 minutes. Second tank was on an 11*7 and lasted about the same, again running fairly rich but the right side of four stroking. I didn't lean it out beyond 10200 rpm but it was throttling quite nicely for a rich run. Next up it will get a 12*7APC and if it passes the club noise test then the rest of the running in will be done in the air.

evo and magnum.jpg

evo 10gx.jpg

John 'JB' Seal04/02/2013 10:29:19
13 forum posts
1 photos

I think they look really well designed and put together. I'm not sure you can ask for a more reasonably priced petrol two-stroke.

Bob, let me know how the flight goes and how it performs. Did you have any issues with its size in comparison to the four stroke you took out or did it just drop straight in?

If its equivalent to a .52 then it could be slightly under-powered for what I want really (I wanted to use it in an Acrowot but don't know now if it will have enough guts...any thoughts?).

Bob Cotsford04/02/2013 16:40:46
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8627 forum posts
483 photos

One, it's what the merkins call a 'small block 60', ie a .46 size crankcase so it was nowhere near touching the mounts for the Magnum 91 4 stroke it replaced. Luckily I had some mounts recovered from a CMPro Cessna that were perfect replacements, even the lead still screwed to the turned out just right to balance the Extra!

Two, those who have flown the engine in the USA report that it's about the equivalent of a 55 glow. Seeing as I flew my Acrowot for years with various .40s, briefly flew it with a .52 2 stroke and even a .52 4 stroke before it's current .70 4 stroke you should be fine with a .60 2 stroke petrol. For club flying anything over a 40 is ok in an AW as long as it's not built like the proverbial brick outhouse.

Turbycat04/02/2013 19:25:20
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594 forum posts
55 photos

Not had much to do with the small Evolution. I have however been runing a 26cc Evolution for years. It has run perfectly for hours. Very rarely needed to fiddle with it at all once it was set up. I'll be keeping an eye on this as I might be wanting to replace some of my smaller glows with petrol.

Andy

Edited By Turbycat on 04/02/2013 19:25:53

Greybeard04/02/2013 19:34:06
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726 forum posts
6 photos

I'm not sure that this engine can be directly compared with a four stroke that produces peak power at around 10,000 rpm and this one that needs to rev to 16,400 for the same. I think that at anything much over 10,000 you could be into noise problem territory.

Turbycat04/02/2013 20:47:12
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594 forum posts
55 photos

Yeah but you're not going to operate it at 16,000+ rpm. You'd prop it down. Personally I'd be looking at a 12x7 or pos a 13x6 same as a good 60 2 stroke and hoping to get around 10 to 11k rpm.

Andy

Max5004/02/2013 21:14:45
178 forum posts
8 photos

The specs for the 10GX in the manual gives it a 12x6 @ 12,600 rpm. Would you get the CDI and lipo into the acro wot with all the other gear. How big is the CDi unit ? . I was only looking at the 10GX because a Hangar 9 Meridian had its spec as using a 10GX, and i thought that looked interesting.

.

Turbycat04/02/2013 21:17:44
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594 forum posts
55 photos

Think the cdi is a bit bigger that a standard servo. They are not very heavy tho'. You should be able to find somewhere to mount it and a 2 cell lipo, to power it, doesn't weigh much either.

Andy

Bob Cotsford04/02/2013 22:28:05
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8627 forum posts
483 photos

Yes, the cdi is a new smaller version. I replaced a Slec orange (11oz?) tank in the Extra with a 6oz tank, the cdi and an 1100 Life cell. As I said, 12 minutes per tank while running in with a rich mixture.

Adrian Smith 105/02/2013 15:48:50
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2472 forum posts
1273 photos

As a committed glow head this thread has sparked my interest (no pun intended) as I have considered a foray in gas engines and read the notes about Evolution engines. After doing a bit of research I wonder about the supply and spares issues with these engines. Apart from the 10cc motor or the 80cc one that King Llynn models do the most prolific stockist seems to be Slough RC and they are all out of stock. Presumably Horizon Hobby supplies the trade & not yer average man in the street direct. I am looking for some thing of the 50 cc size like the 45 or 50 GX marques, but this search has proved fruitless unless I am looking in the wrong places. By the way I won't order from abroad so any ideas? Thanks.

Former Member05/02/2013 16:44:17

[This posting has been removed]

Adrian Smith 105/02/2013 19:16:13
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2472 forum posts
1273 photos

That's very interesting Percy just goes to show you learn something every day. Thanks for that, I will look into MVVS engines and do some research, but it is always good to hear favourable personal testimony.

Bob Cotsford05/02/2013 19:26:34
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8627 forum posts
483 photos

As I understand it, the Evo glow motors are made by Sanye who also churn out SC, ASP, Magnum and I think RCV branded motors. As the 10GX looks the same as the 60 glow externally I would imagine this is also from Sanye.

Former Member05/02/2013 20:37:59

[This posting has been removed]

Adrian Smith 106/02/2013 09:13:25
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2472 forum posts
1273 photos

Thanks Percy that's given plenty to go on and I fancy giving a petrol engine a try if only to challange myself after donkey's years of glow engine flying. Me thinks I have a lot more reading to do to make sure I do it right.

Former Member06/02/2013 18:31:46

[This posting has been removed]

Adrian Smith 106/02/2013 19:09:29
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2472 forum posts
1273 photos

Mmmm.... food for thought there Percy. I had read in passing some while ago the issue regarding rather imperfect silencing on petrol jobs. I must admit money spent on a decent after market silencer, whether glow or petrol, as money well spent. Therefore I would certainly factor that into costings. Whilst aircraft noise is not a big issue where I fly (on a disused USAAF airfield as a solo flyer) I am sensitive to noise pollution and I aways test my engines with a decibel meter which was quite cheap to buy. I was always wary using petrol as opposed to glow fuel for R/C planes due to its volatile nature, but I have yet to find an adequate capacity 2 stroke glow engine to power my 50cc aerobats. I am using OS BGX glow engines with a pipe set up but top end power is not quite there. Anyway thanks for your input.

Paul Marsh08/02/2013 16:40:18
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4064 forum posts
1223 photos

i bought this, today. Smallest petrol engine i've got and will be ideal for general hack models - ie .40-50 size club models running on petrol.

Note: A DECENT SILENCER!!!

No, I'm not shouting, an actual silencer that silences, not just a gunk redirector...

dscf5055.jpg

Edited By Paul Marsh on 08/02/2013 16:44:53

Edited By David Ashby - RCME on 08/02/2013 17:00:07

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