BLR 1900 Whisper Prop STC Now FAA Approved Available at AMK “Your Aviation Partner”
The reality is, comparing these two propeller sets (the factory Hartzell 4-prop and the MT Whisper Prop 5-prop) is apples to oranges. Noise (take-off):B1900C:Hartzell 4-blade: 84.0dBMT WP 5-blade: 81.5dB2.5 dB difference1900D:Hartzell 4-blade: 88.0dBMT WP
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