Radial Engine Plans - 2" or 1" round cylinders?

[Novian]

Wondering if anyone knew of free 3 or 6 cylinder radial engine plans that use 2" or 1" round bar for the cylinders. Would like to start building my first engine. Compressed air powered. I have minimal materials right now: -2" 6061-T6511 Aluminum Round, -1" 6061-T6 Aluminum Round and Minimal Tooling: Lathe 3-Jaw Chuck(no 4 Jaw Chuck for square bar), and some tooling, No mill yet.

I have 1 week-ish time off spring break from school and would like to put the daytime hours to good use.

Thanks,

Ian