Rotorcraft Through History
A type of aircraft characterized by the two rotor systems mounted one in front of the other on a horizontal plane, first developed by Nicolas Florine in 1927.
What is a tandem rotor aircraft?
A spiral-shaped object
What is a helix / what are helices?
The original name of the Morton, PA helicopter manufacturer acquired by Boeing in 1960
What is Piasecki Helicopter?
The namesake of the CH-47 program, located in Washington and Oregon
Who are the Chinook people?
The physical quantity representing the force present in a body during deformation, characterized as P/A
What is stress?
The power source of the Solution F/Chretien Helicopter, the first of its kind to hover out of ground effect on August 12th, 2011
What is electricity?
A 3D geometric surface that resembles a twisting spiral ramp or infinite screw thread, first described by Euler in the 18th century
What is a helicoid?
The only name of the following that the current-day Boeing Vertical Lift Division did not have:
Boeing Helicopters
Boeing Vertol
Boeing Helicopter Holdings
Boeing Rotorcraft Systems
What is Boeing Helicopter Holdings?
The original designation of the CH-47 helicopter, dubbed in 1961
What is the YHC-1B?
The ratio of inertial to viscous forces acting on a fluid flow; a lower number corresponds to laminar flow while higher numbers indicate turbulence
What is the Reynolds number?
The first practical rotorcraft, developed in the 1920s and flown across the English Channel by Spanish engineer and pilot Juan de la Cierva
What is the autogyro?
A measure of linked-ness or knotted-ness of vortices in fluid flow, described by Euler in the 18th century
What is helicity?
The most-selling helicopter sold by Boeing Vertical Lift, having delivered more than 2,500 units to date
What is the AH-64 Apache?
The first major conflict in which CH-47 aircraft were deployed by the US Army, starting in February 1966
Systems of partial differential equations characterizing motion for viscous fluids, developed by and named for 2 mathematicians who documented the principle in the 1800s
What are the Navier-Stokes equations?
The aircraft company that developed the YOH-6A which in 1966 broke the record for the longest distance flown by a helicopter without landing (2,213 miles)
What is Hughes Helicopters?
A large brass tuba, and also a mountain in Greece and a river in Ancient Macedonia
What is a helicon?
The year in which Boeing Vertol was re-designated Boeing Helicopter Division
What was 1987?
The only Western helicopter with greater lifting capability than the CH-47 platform, developed by Sikorsky in the 1960s
What is the Sikorsky CH-53K King Stallion?
An aeroelastic phenomenon characterized by uncontained vibration that with no net damping can cause result in failure of a structure
What is flutter?
The first helicopter to be used by the US military (during WWII), notoriously so difficult to fly that "the control stick shakes like a jackhammer, and the pilot must hold it tightly at all times" and "Should he relax for even a minute the plane falls out of control"
What is the Sikorsky R-4?
The cultivation of edible land snails for human consumption and cosmetic use
What is heliciculture?
The model name of the first aircraft developed, built, and flown by Piasecki Helicopter Corporation in 1943
What was the Piasecki PV-2?
The company that developed the engines first used on the CH-47, model number T55
What was Lycoming?
The criterion typically used to characterize failure in anisotropic materials, used not only for composites but also for bone mechanics
What is Tsai-Wu or Tsai-Hill failure criterion?