RE: Gilbert .11 Engines
I have several of these. The first I got new when I was in sixth grade about 1964. I have added a homemade carb to one and it works quite nicely. I installed a .15 size perry carb on anothe and I can't keep it running. The rest have been left alone to run as intended. The one with the hommade carb turned a 7x3 Gilbert prop at 12,800 when last flown. Easily out turning a magnum .10 with the same prop.