
1) Engine technology
Found on
https://www.crosswordclues.com/clue/crossplane

The crossplane or cross-plane is a crankshaft design for piston engines with a 90° angle (phase in crank rotation) between the crank throws. The crossplane crankshaft is the most popular configuration used in V8 road cars. Crossplane crankshaft could be used in many cylinder configurations to have an evenly spaced firing as long as the number of ...
Found on
http://en.wikipedia.org/wiki/Crossplane
No exact match found.