ameyam

The OS is a ringed engine with a pistion liner. As I understand, that equates to more power and probably a stronger punch at the low end. Inherently heavier though. Plus the wrap around muffler will make the engine quieter albeit heavier still. You are right about first cost and replacement parts pricing though

Ameyam

Ernie Misner

Do you mean a cast iron sleeve compared to a lightweight chrome plating right on the aluminum cylinder for the other and lighter engines? I wonder how that could change the power curve any in itself.

airborne2.4

I'm not sure who makes the Extra 260, but I think the GT22 would be a good match for this:
http://phoenixmodel.com/Default.aspx...CatId=15&id=40

TH has it in stock

Ernie Misner

Yeah, great looking plane for any 20cc. Much better price than the 3D Hobby Shop Velox but the Velox is the best of the best.

http://www.3dhobbyshop.com/70-VeloxBlue_p_16184.html

airborne2.4

Yep, that Velox is the best of the best.

karolh

I do agree but the price is a bit steep for my pocket for a 20 cc model.

Karol

hairy46

My Feedback: (1)

OS engines are first class and parts are very expensive, but I have nothing but good luck with them, I do wish DA would make an engine in the 20 range though!