What is a Hydromatic propeller?
A hydromatic propeller has a double-acting governor that uses oil pressure on both sides of the propeller piston. Many larger turboprop systems also use this type of system. The governors are similar in construction and principle of operation in normal constant-speed systems.
What is so special about the Hydromatic propeller?
The hydromatic propeller was designed for larger blades, faster rate of pitch change, and wider range of pitch control than earlier controllable-pitch propellers.
What is Hamilton Standard constant speed propellers?
The Hamilton Standard Hydromatic propeller introduced in the 1930s was a significant advance over the counterweight, controllable pitch propeller. Application of oil pressure to both sides of the actuating piston provided increased capacity and the capability of feathering or unfeathering by a single control knob.
How is the feathering system of a Hamilton Standard Hydromatic propeller actuated?
How is the feathering system of a Hamilton-Standard Hydromatic propeller actuated? The Hamilton-Standard Hydromatic propeller uses a feathering pump to supply high pressure to the propeller during the actuation of the feathering system.
What do Hydromatic propellers use for lubrication?
A hydromatic propeller has a double-acting governor that uses oil pressure on both sides of the propeller piston. Many larger turboprop systems also use this type of system. The governors are similar in construction and principle of operation in normal constantspeed systems.
What is the primary purpose of a feathering propeller?
The inflight feathering of the propeller, on an engine that has failed or has been intentionally shut down, greatly reduces the drag that would occur with the blade pitch in any other position.
Is a stainless steel propeller better than aluminum?
The properties of stainless steel result in a propeller that offers more performance and more durability than an aluminum prop. Stainless steel has five times more stress tolerance than aluminum, which means the blades of a stainless steel prop can be much thinner than those of even a Mercalloy® aluminum prop.
What is the function of a hydraulic pitch lock in a Hydromatic propeller?
A hydraulic pitch lock is utilised in a hydromatic propeller to. Option A. lock out the course pitch oil line in the event of underspeeding.
What is full feathering propeller?
A feathering propeller is a type of constant-speed propeller used on multi-engine aircraft. Feathering propellers have a mechanism to change the pitch to an angle of approximately 90 degrees. Usually, a propeller is feathered when the engine fails to produce the power needed to turn the propeller.