If my memory is correct I believe that the prop was an 8 5 or 6 but I kind of remember an MK or other japanese propeller with metric markings. The builder had shrunk the arrow plans to about 4 foot span. It flew nice but was really fast. I would say that the engine was about 16K or better. I'm trying to find some pictures of the Korean R/C flying. I was surprised about the development that those guys put into smaller pattern planes. They flew a shorter like intermediate pattern and used 6-8 oz tanks. They said that the average flyer could not afford the fuel for a 60-120 size ship. They were kind of sad to hear that I was paying about $ 12.00 for a gallon of 15% CP at the store and we got discounts for volume. Really nice guys to fly with same as most R/C guys around the world.

Peace

Mark O