The increased performance of the SCHOTTEL RudderPropeller Dynamic SRP-D has once again been confirmed by external sources. At the request of the Dutch Damen Group, the Maritime Research Institute ...
Using two propellers spinning in opposite directions, the genius contra-rotating propeller system is used on marine vessels ...
Helicopter-like drones are extremely nimble, but their fixed-wing counterparts aren't so lucky. Chinese researchers have a way to bring some of that agility to conventional airplane designs, though.
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