This is RCG 20cc gas motor from Hobby King. I paid less than $200 and it has Turnigy 17X6 wooden prop. I ran this motor for the first time, pretty impressive results. It's mounted on Seagull model's MXS-R 120 which I would have a maiden on this Sunday hopefully. I'm using 4.8 volts battery for the ignition and 6 volts life battery for receiver.