Mnemonic. 1  V: vertebral artery. 2  I: internal thoracic artery. 3  T: thyrocervical trunk I: inferior thyroid artery.  C: costocervical artery S: superior intercostal 1  artery. D: dorsal scapular artery.
Aircraft Engine Governors Repairs, Overhaul and Refurbishing, overhaul services, exchanges and technical support for all major governor manufacturers including McCauley, Hartzell, MT-Propeller, Woodward, Hamilton Standard, Aero Technologies and Jihostroj.
How Pneumatic Engine Governors Work. The speed-sensing device on a pneumatic governor is a movable air vane, made of metal or plastic. This small engine part registers the change in air pressure around the spinning flywheel. The pneumatic governor also relies on one or two springs to pull the throttle toward the open position.