At 600 hp before the reduction, our engine should now make 636 hp, which is a small gain. Using compressed air, because this system radically reduces the inlet air temperature to 0 degrees ...

but it’s a fun thing to tinker with at the small scale. [Tom Stanton] is plenty experienced in that area, having built a series of compressed air engines over the years. His latest effort is ...

The engine in question is a small sidevalve single cylinder Suffolk ... It’s an effective device, easily capable of taking more air than his compressor can supply.