Variable pitch "D"

Propellers marked with "D"

Propellers marked with "D" has variable pitch. Those has about 10% more efficiency and are quieter at work. Bigger pitch at the hub and elongated profile gives very good cooling during "3D".

Differences between normal propeller and propeller with variable pitch "D":
propeller 1-2b propeller 1-2b propeller 1-2b
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