To meet the needs of Marine energy saving support wrappings are added to tail shafts which are in the ships with double propellers or more than two propellers.
The first aeroplanes were driven by propellers and they flew slowly by present day standards.
The ocean warriors hurl rancid butter on Japanese decks, use warps to foul propellers and attempt citizen's arrests of the whaling captains.
Jet engines with which most modern high-speed aircrafts are equipped develop thrust on the same principle as the propellers of conventional aero-engines.
Some resembled windmills, animal cages or ship propellers.
I knew how common it was for these lumbering giants to be gashed by boat propellers.
The aircraft's advanced turboprop engines sport low-noise propellers and further mitigate noise by providing thrust sufficient for short takeoffs and quick climbs.
The 22-ton stainless steel propellers on the icebreaker Louis S. St-Laurentpause in their work pushing the Canadian vessel through frozen waters-allowing a diver to venture near.
The propellers lifted off the ground at 28 miles per hour.
That's pretty cool! The propellers lifted off the ground at 28 miles per hour. And they say there are 12 solar cells built into its wings.
The ship's propellers churned the waves to foam.
He conducted tests to show that they could recognize different vessels by the sounds of their propellers.
A simplified theoretical method for calculating tandem propellers is presented in this paper.
A quarter of the weight of HB-SIA is accounted for by its lithium-polymer batteries, which will power the four electrically driven propellers during the first test flights.
This avoids the use of a traditional propeller shaft and puts the propellers in a clear flow of water, which greatly improves efficiency.
The water was thrashing and churning about under the propellers.
The engines used by Ark Angel are electric motors driving counter-rotating propellers, mounted in pods below the hull.
An airplane cannot fly out into space be cause it must have the air for its propellers to push against.
