Dynamic Balancing

EeziWeigh

Aircraft Weighing Service

01543 482063

07976 602110

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Dynamic Propeller balancing is probably one of the most under used facilities available to aircraft operators. So why do we need it. Vibration is one of the biggest causes of fatigue and has a damaging effect on the airframe, propeller, engine, engine mount and avionics. It also makes flying uncomfortable for pilot and passengers. All of the major propeller manufacturers recommend that is done frequently.

So how is it done?

An accelerometer is temporarily fixed to the engine and a digital rpm counter attached to the cowlings. The equipment then measures the IPS (inches per second) of movement [vibration] and calculates a fix using weights attached at specified points. This information is sent wirelessly via Bluetooth to a monitoring device. The balancing usually takes a good 2 to 3 hours to complete with several static engine runs at around cruise revs. I then enter the balance figures in the Aircraft/Engine/Propeller log books.

It is important that propeller tracking and blade angles are set accurately and checked before dynamic balancing. This must be done prior to my visit. Be prepared to do the following things:-

Remove cowls

Add weights where specified

Drill holes in spinner backplate

Do multiple engine runs

Chock the aircraft

Enjoy a smoother engine

Quote:- "McCauley endorses dynamic balance on propellers installed on piston and turbine powered aircraft."

For LAA & BMAA permit aircraft.

I cover the whole of the Midlands area. Discounts may apply, see prices.

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