Yes , many will disagree, but this is no 50cc plane at all
Nitro OS 160. Moki 1.8, maybe 2.10, 4 stroke 1.40 - 2.20 or 30-35cc gasoline.

When going 50cc gas, things get a bit complex and tight and the added weight just makes it a fast sport model, that struggles with slower flight envelopes alot, including landing and other airframe issues.. sure it will rocket out of a hover and across the sky.

The limited 3D it was designed around, is lost with the added burden of bigger gassers.
Other actual 50cc airframes are quite a bit larger then the H9 260.

I am sure the life span is cut rather short, when using a 50cc up front.

Sure it can be beefed up to handle it, if you dont mind flying a fat..