The Importance of Dynamic Balancing

Having your aircraft propeller dynamically balanced is the most cost effective maintenance you can do for your airplane. 

 Balancing your aircraft propeller increases the life of your engine, improves performance, reduces vibration and saves maintenance dollars. An experienced technician will generally reduce your propeller’s vibrations to half the acceptable .14 IPS limit.  Our hundreds of hours experience in dynamic balances have proven that airplane owners can achieve dramatic and marked improvement in smoothness of aircraft operation through the dynamic balancing of their propellers.  This holds true for:

  • Turbine single and twin engine aircraft
  • Piston single and twin engine aircraft
  • Single fix pitch propeller aircraft

Reading the FAQs below will help you to better understand the advantages

of a dynamically balanced propeller. 

 How do I know if my propeller is in need of being dynamically balanced?

  •  If you have had your propeller overhauled or replaced, you should have the propeller dynamically balanced.  (The propeller repair shop will provide a static balance only).
  • When your propeller is removed for engine work, you may want to have the balance rechecked. 
  • If your engine keeps developing oil leaks after repairs have been made.
  • If your plane vibrates excessively. (NOTE:  Some out of balance propellers do not cause perceivable vibration but still need to be balanced!)

My aircraft runs fine, why have my propeller balanced?  

Most fixed-wing aircraft will benefit from having their propeller dynamically balanced.  Most of the aircraft we have balanced had an initial vibration level greater than .30 IPS, three times the acceptable vibration level.  Your engine, firewalls, instrumentation and even the structure of your aircraft will benefit from reduced vibration levels following a dynamic balance.

 My aircraft propeller was overhauled recently. Should I have my propeller dynamically balanced?

The best time to dynamically balance a propeller/crankshaft is following an overhaul or propeller replacement (5-10 hours operation gives the propeller time to stabilize).   Even new aircraft with zero time engines and propellers need to be dynamically balanced.   The shop that overhauled your propeller will statically balance your propeller before returning it to you.  It must then be dynamically balanced when bolted to your aircraft.  Many shops have the capability to do dynamic balancing. 

 What level of propeller vibration is acceptable?

In most cases, the vibration level due to mass imbalance can be brought down to under .14 IPS (inches per second) and usually to less than .07 IPS.  When propeller vibration levels are this low, the operator will see a significant reduction in component wear and fatigue and the majority of pilots immediately notice a positive effect on the level of vibration in the cabin.

 Will having my propeller dynamically balanced disguise other engine problems?

No! An engine with an internal problem causing unusual vibration will not respond to balancing in the same way that an engine which only vibrates from a propeller imbalance.


Dynamically Balancing your Propeller Saves Maintenance Dollars