Hi guys,

I'm buying a cmpro marathon linked bellow:

http://www.cmpairplane.com/aerobatic...on%2020cc.html

It shows the G20ei zenoah engine in the picture provided by manufacturer, i have contacted them and was told that it was the engine they did the test flying with and it performed well with that model and also prop hanged despite the weight of the model. I was thinking about the G26ei but i am not sure if it will fit in the place of the g20, does anyone know?

Furthermore, i don't know where to order one online from with the tuned pipe for it. Anyone know a website i can purchase everything from in europe? Even from US is fine.

I would also like to know what prop i should order if i were to use this with a tuned pipe to get the maximum static thrust and also without a tuned pipe as i cannot find any online manuals on the G20.

Any comments are welcome, i know the plane is a bit heavy but i like the looks and it fits in my car easily from the given dimentions.

Thank you.

http://www.toni-clark.com/ will have the engine and good exhaust options, and anything else you need for that Zenoah.

I can't seem to find any buy online options on that page, do they do internet sales?

Like Chad said Toni Clarke is the place to go and his online catalogue has all the Zenoah goodies listed, including prop/exhaust combinations information. Using a G20 in stock form would most likely only give a marginal flight performance for an aerobatic model like yours having an AUW of 12 lbs, however using the Toni Clarke exhaust system on the G20 which is claimed to give a whopping 40% increase in power would be the way to go.

Karol

Yes, from cmpro they said the same thing to me, use the tuned pipe and this plane will make you very happy. I'm going to get the g20 with the tuned pipe and use a 16x8 mez