It is now twenty-five years since Capt. Ericsson was first introduced to the public as an inventor and improver of the hot air engine, and if ever an inventor deserved success, he certainly does.

The intake manifolds are therefore shielded from excess heat and can be made smaller per side while providing more air volume ...

If hot-air engines and inflammable gas engines fail as yet to furnish power comparable to .hat which steam affords, without a very disproportionate increase of bulk, and for high powers fail to ...

The water vapor from the hot plane engine turns to ice mid-air which we see as white lines in the sky called contrails. This is the same phenomenon we see when we breathe hot air on a cold day.