Abstract: A contra-rotating propeller (CRP) offers higher propulsion efficiency compared to a single propeller. This article presents a novel underwater CRP propulsion system that integrates a ...

Steerprop will deliver its new Contra-Rotating Propeller (CRP) azimuth propulsions to Lloyd Werft Bremerhaven GmbH for a new research vessel being built for the German Aerospace Center (DLR).Measuring ...

This story was updated to include comment from West Contra Costa Unified and to exclude the requirement that the district make facilities updates, which was dropped in the appeal. A two-year court ...

Northrop’s flying wing bomber was built to solve a brutal requirement: carry 10,000 pounds of bombs for 10,000 miles, potentially flying global sorties without overseas bases. The XB-35 promised range ...

The Airbus A400M is one of the most distinctive aircraft in the sky, and its unusual humming sound is a big reason why. Produced by the interaction of its massive counter-rotating propellers, the ...

The P‑51 Mustang became a common choice for air racers in America due to the large number of surplus airframes available ...

GE and Lockheed Martin plan to get around this by accelerating the missile using a rotating detonation engine, which uses a supersonic wave of detonating fuel that runs about inside an open-ended ...

The de Havilland Mosquito was a fast British multi-role combat aircraft that flew in 1940. Powered by two Rolls-Royce Merlin engines and with a lightweight construction that made extensive use of wood ...

Teachers in the West Contra Costa Unified School District reached a tentative agreement with district leaders. The United Teachers of Richmond said the deal secures expanded health benefits and an 8% ...

RICHMOND — A strike by West Contra Costa school employees entered its second day Friday after union members said no progress on forming a new contract was made during their latest discussion with ...