A .46?
strange --up till late 1940's , all model engines were spark ignitioned and ran on a mix of motor oil and gasoline
some were pretty good runners but the interest in these is all but gone -just collecters n free flight guys
here is my .14 cu in Marvin engine from way back when. If you could lay your hnds on an old Mc Coy, O&R,or similar engine you could adopt one of the inexpensive Chinese ignitions and actually go flying -a very light model such as the SiG Seniorita could work. . My first model engine was a .09 ATOM gas engine , with a glow plug.
Using a new radio system such such as the Spektrum 2.4- one could also fly, using one of the old open point gnition systems - maybe - I would hve to do a check first but if the spark plug wire was tight -it should work. These new radios are pretty immune to low voltage spark noise.
He asked