Definition
A specialized hand tool used to grip a propeller blade by its airfoil surface so the blade can be rotated in its hub to set or adjust pitch. The wrench is shaped to clamp around the blade without damaging the surface, allowing controlled twisting during propeller assembly, repair, or pitch adjustment on the ground.
Plain English
A tool that grips a propeller blade so a mechanic can twist the blade to the correct angle.
Context Anchor
Seen in aircraft maintenance, especially when a propeller blade must be positioned, adjusted, or removed.
Why Pilots Care
Pilots don't use this tool themselves, but understanding it helps when reading maintenance records or discussing propeller work with a mechanic, since blade angle directly affects engine performance and aircraft handling.
Intuition Check
Do not picture a normal wrench turning a nut or bolt. A blade wrench is shaped to grip the propeller blade itself without crushing or scratching it.
Example Sentence 1
The mechanic used a blade wrench to set each blade to the same angle during propeller installation.
Example Sentence 2
After checking blade condition, the technician tightened the retention bolts with the blade wrench.