The Revolution 50 motor is manufactured in Canada by Cimmaster Inc, the maker of Brison motors. It has a long shaft and has been designed for narrow cowl 50cc warbirds, particularly the P-51 Mustang. One photo shows a fibreglass tunnel that takes in air from the Mustang chin scoop. The fan on the motor shaft pushes air over the shaft and back to the carb. The engine head does not protrude out of a Mustang cowl but as usual the airflow must be baffled to direct it over the head and one must cut a hole to allow air to exit the cowl. There is an engine mount that provides a shield between the exhaust and the Walbro carb to help avoid vapour lock. It is recommended to cut a 32mm diameter hole in the firewall behind the carb to aid in getting cool air to the carb (as for a DLE55 RA) . Fuel 95 octane and oil ratio 40:1 to 100:1. New carb fitted January 2019. The engine mount has guide holes to access the hi and lo carb needles and in the rear for the throttle and choke cables. Approx 6,200 rpm with a 21x10 prop. See also http://rc-revolution.com/engine_r50u.htm. The motor comes with the M535 (quiet) P-51 muffler that has had an extra hole put in the baffle to raise the rpm. The Tru Turn 5" spinner is removed from this auction as it is now needed for another project. Ideal engine for a 1/5 scale P-51 Mustang. Selling price is in NZD.