Airplane Description DA 62 AFM
7.9.2 PROPELLER
Two mt-Propeller MTV-6-R-C-F/CF 194-80 hydraulically regulated 3-bladed constant
speed feathering propellers are installed. Each propeller has wood composite blades
with fiber-reinforced plastic coating and stainless steel edge cladding; in the region of
the propeller hub, the leading edge is coated with adhesive PU foil. These blades combine
the lowest weight whilst minimizing vibration.
Propeller Control
The propeller pitch control system consists of the P-877-16 mt-Propeller governor valve.
The pitch is set by the ECU via an electro-mechanical actuator on the governor. To change
the blade pitch angle, gearbox oil is pumped into the propeller hub. Increasing the oil
pressure leads to a decrease of pitch and a higher RPM. Decreasing the pressure leads
to higher pitch and a lower RPM.
Depending on the power lever setting, the propeller pitch is adjusted such that the required
RPM will be obtained as shown in the following diagram.
Page 7 - 32 Rev. 0 11-Jan-2019 Doc. No. 11.01.05-E
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