RE: tachometer question
Don't be a smartA, BANJO. If you've ever been in the area of a flying prop or a runaway plane, you wouldn't make jokes. Although you DO need to be in the danger zone to start the plane, REALLY smart pilots quickly move to the rear to do any adjustments.
However, if your engine will start with a chicken stick, and you can reach the prop around the fuselage/cowling, the engine CAN be started from the rear.
Also, several years back, a device was developed that held an electric starter in place in a stand. The pilot held the plane with the spinner pressed into the starter cone, and the starter was triggered with a footswitch.
Dr.1