Скачать или смотреть "Perfect fourth" hypothetical 60º bank angle V14 engine audiovisual demonstration - RPM sweep

This is a demonstration of the firing interval of a 60º V14 with the crankshaft phased to create a perfect fourth between the "outer 8" cylinders 1,5 (firing at 180º intervals on each bank) and "inner 6" cylinders (firing at 240º intervals on each bank)

The firing order of this theoretical engine is 1 8 3 10 6 13 4 7 11 14 2 5 9 12

Firing intervals are 0º, 60º, 80º, 140º, 180º, 240º, 320º, 360º, 380º, 420º, 540º, 560º, 600º, 620º

This crank configuration should have a smaller rocking moment than an even fire V14 engine, but second order shaking would probably be bigger/worse.

This is based on the "perfect fourth" I7 engine experiments, there is no reason a real engine would need to have a 60 degree bank angle, this angle fits with the existing intervals for the I7 engine, but it would make for a slightly narrower engine.