The L1 was largely an experimental engine, but a small production line was set up in 1925.

In the period 1967-1969, several fire tests were performed with experimental engines which were adapted for work at sea level and had short nozzle.

Designed in the 1930s, it was an unusual experimental radial engine with inline cylinder banks.

Quite a slice of it went into experimental engines before I finally perfected one.

SS-99 uses the experimental "L-type engine" that does not give off radiation.

Certain experimental engines had a British-style firebox door instead of the usual American type.

With all of these different versions and experimental engine fits, it might seem like every aircraft differed significantly.

However, the experimental 589 engine was extremely loud.

The flight, however, ended after six minutes due to difficulties with the experimental engines.

On May 27, an experimental engine exploded and killed Valier.