I also have one of these I ran quite a long time ago in a 9' wingspan Mr. Mulligan.
Weighed about 22 lbs. if I remember.

Would need the entire lenght of runway which was probably 200' .
And was very sluggish flying . Looked Good and Realistic flying but not enough power.

Tried the G38 gas which is mounted up front now , but the darn weight is to heavy. Need to chop off 6" up front add 20 oz. in the back ....which means , it still sits and waits .

If I cut the nose off shorter , there goes the major look of the plane which has a 10" radial cowl with blisters and would look way wrong. Gas is the thing but make sure it's done right the first time as far as CG.

I have always liked the supertigre engs. Reliable , I had a 24 oz tank and got maybe 15 mins flight with the mulligan. Always seem to need ..More Power in everything.

Tony