The Mach 1 is a 70's pattern plane. It is a fast smooth flyer for it's time and well thought of. Any .60 sized 2-stroke on a muffler will fly it very well, but a piped .60 will make it fly great. Sorry, I don't have any plans or instructionsfor this model. Check with Midwest. They might have a set in their archives they would be willing to send to you.

John