01/12/2022
CALLING ALL GEARHEADS
LATELY ALL THE RAGE IN THE NEWS IS THE USE OF THE FLAT PLANE CRANK. WHAT IS IT AND WHY IS IT? HERE'S THE BEST EXPLANATION I CAN GIVE.
CRANKSHAFTS HAVE THE CONNECTING RODS ON WHAT IS CALLED THE BIG END AND AT THE OTHER END IS THE PISTON. THE CRANK OS ROUND AND DIVIDED, NATURALLY, INTO 360 DEGREES AROUND THE CIRCLE. THIS IS HOW THERE ARE A FEW MOTOR CONFIGURATIONS THAT MIGHT SEEM ODD, LIKE A 3 CYLINDER MOTOR. IF YOU CAN DIVIDE 360 BY A NUMBER EVENLY, VOILA, YOU HAVE A MOTOR. 3 CYLINDERS DIVIDES INTO 360 EVENLY SO EACH CYLINDER IS SPACED 120 DEGREES APART. A 5 CYLINDER IS SPACED 72 DEGREES APART. THE LIST GOES ON. WITH A ROUND CRANK, EVERY FULL TURN ROTATES THE CYLINDERS ONCE, EACH INDIVIDUALLY, SO THAT IN A V8 ENGINE, ONE SPIN OF THE CRANK MAKES FOR 8 MOVES. WHEW! THAT'S A LOT OF ENERGY!
A FLAT PLANE CRANK IS AN ENERGY SAVER! ONE SPIN ONLY MOVES ONE WHOLE BANK (THET IS LEFT OR RIGHT SIDE) ONLY ONCE PER SIDE. ALL 4 PISTONS ON ONE SIDE MOVE UP, THE, 180 DEGREES LATER, THE WHOLE OTHER SIDE GOES UP. THE FIRING ORDER IS A TAD DIFFERENT THAN IN A ROUND CRANK, HOWEVER, WITH ONLY 2 MOTIONS PER SPIN, WAY LESS ENERGY IS NEEDED TO TURN THAT MOTOR. TO GO ALONG WITH THE ENERGY SAVINGS, THE MOTOR CAN NOW SPIN, OR REV, HIGHER AS THERE ARE FARLESS MOTIONS TO BE DONE. FORMULA ONE CARS SPIN, OR REV, AS HIGH AS 18000 RPMS BECAUSE OF THIS FLAT CRANK.
SO THERE IT IS, THE ALMIGHT FLAT PLANE CRANK!