It is my understanding that straight cut gears don't produce as much axial load as helical, so you can send more torque through them without blowing the transmission casing. They're also smaller and lighter, and produce less friction. But since there's less surface area between teeth than helical, they can't produce as thick of an oil film between the mesh so thus they produce a loud whine.
From what I understand you can have dog engagement, or even synchronized straight cut gears. Likewise, you can also have helical gears with dog engagement. It is the type of shifter that affects how quick you can slam into the next gear, synchros of course require friction from the friction brake in order to match the speed of the gear to the main shaft speed. Which takes time, especially at higher RPM.
Am I missing anything here? Am I correct to say that neither helical nor straight cut has any effect on how quick or slow a transmission can shift?
From what I understand you can have dog engagement, or even synchronized straight cut gears. Likewise, you can also have helical gears with dog engagement. It is the type of shifter that affects how quick you can slam into the next gear, synchros of course require friction from the friction brake in order to match the speed of the gear to the main shaft speed. Which takes time, especially at higher RPM.
Am I missing anything here? Am I correct to say that neither helical nor straight cut has any effect on how quick or slow a transmission can shift?
