How is a dynamic balance carried out?
Nothing is removed from the propeller or engine. A small vibration sensor (accelerometer) is mounted on the forward end of the engine (as close to the forward engine bearing as possible). A ‘light source’ or photo tach acquires the speed and phase angle data (the engine is then run). The resulting information is then processed by the probalancer analyzer 2020, which displays a resolution/correction (where and what weight is to be added). After the installation, a final engine run is carried out, and the probalancer analyzer prints out a final resolution/correction statement (which is placed in the log book). In normal use, propeller dynamic balance should be checked every 400 to 600 hours or after prop or engine overhaul. Problems caused by out of balance propellers: • Pilot fatigue • Leaky oil coolers • Cracked or broken exhaust manifolds • Broken or cracked engine and/or turbo charger mounts • Vacuum pump failure • Avionic, alternator, fuel control failure Benefits of a dynamically b
