Many of these experimental variants pave the way for series production versions.

It was available in 12- and 16-cylinder versions, along with a single experimental 18-cylinder variant.

In addition, the M1931 had a number of experimental variants.

Many of these experimental variants enabled series production versions.

An experimental variant, the Griffon, was built by Banshee International.

Industrial hip hop is connected to (and sometimes confused with) the more experimental variants of trip hop.

Including all the marks and experimental variants there have probably been over 60 different vehicles.

Several experimental variants were constructed in an effort to reduce costs and maintenance, although these met with varying degrees of success.

Many experimental variants were built and the valuable experience launched the Soviet strategic bomber program.

No type has ever gone into production, although a number of experimental variants have been flown.