The Pennsylvania A3 Switcher

The Pennsylvania A3 Switcher

This construction project in 3/4" scale (that you may scale up to 1 1/2" scale) is perfect for the first time builder. Sharp, detailed photos, incredibly illustrative drawings and inch dimensioning appeal to expert builders as well. Very thorough descriptions of part fabrication make any novice machinist able to build the engine with ease and confidence, from stock materials.