Warp protractor

Warp Drive propellers are ground-adjustable. This protractor is used to set the pitch (angle of attack) of each propeller blade and when used properly, can be accurate to within 1/4 of a degree. Propeller blades are pitched one at a time with the protractor clamped at the blade tip while the blade is rotated in the hub.Note: Using this device, your aircraft does NOT have to be level during adjustment.