I will be able to weigh my 47 shortly and then will decide if my ZDZ-50NG equipt with the Supersonic Pitts style muffler and swinging a 22X8 will produce enough thrust.

---------->I have heard the GP 78" Extra is on the heavy side for a 25% that I guess it is , well I can say from boring holes in the sky with it,that the ZDZ-50NG always pulled the Waggs--Extra vertical and after hesitating did the vertical roll thing while running a mixture of 32-1 (4 Fl Oz)PennZ o---2 cycle to 1 gallon 92 octane and the high end needle on the Warbro carburetor , set a bit rich.

I might just add ZDZ RCS does not recommend Lawn Boy ash less for their engines