Lycoming O-540 6-cylinder engine test stand
Also there is a Wright 9-cylinder air-cooled radial engine as well used in Douglas A-33 Martin B-10 Boeing B-17 Flying Fortress Douglas B-18 Bolo ...
X-33 - Ground-based firing of a linear aerospike rocket eng
In this 23-second clip the Rocketdyne linear aerospike rocket engine is fired in a test stand at the Santa Susana facility of Rocketdyne in ...
engine test
Engine Test done by Ernest Zavarsky for MHZ Powerboats