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In February 1944, they sent out a request for helicopters. A high-level decision was made to send three YR-4Bs from the Sikorsky factory. Crew chief Jim Phelan remembered the long journey from Connecticut to commando country.
- What Makes A Helicopter Spin?
- What Is Loss of Tail Rotor Thrust on A Helicopter?
- What Is Loss of Tail Rotor Effectiveness on A Helicopter?
- To Finish
- Further Reading
When a helicopter is working correctly the engine drives the main rotor via a transmission. Because of Newton’s Third Law‘For Every Action, There is an Equal and Opposite Reaction’ this makes the fuselage want to rotate in the opposite direction to the main rotor. This is known as ‘Torque’. Think of it like drilling a hole and the drill bit sticks,...
On a conventional helicopter, the tail rotor airfoils produce horizontal thrust as they spin, just like a fan sitting next to you on a hot day. The tail rotor is driven off the main transmission so when the main rotor turns, so does the tail rotor. On the Astar that I fly, the tail rotor turns approximately 7 revolutions for every single revolution...
The loss of tail rotor effectiveness, shortened to LTE is an aerodynamic situation where the tail rotor is momentarily unable to produce enough thrust to equal the torque of the fuselage and the helicopter begins to spin. For an airfoil to work efficiently it needs clean, undisturbed air to work on, to turn at a determined rpm, and produce enough t...
Helicopters spin out of control when an issue arises from the anti-torque system on the helicopter. Be it a mechanical failure, the pilot hits something or the helicopter is being operated in conditions that can lead to the onset of it losing its effectiveness. Any condition that prevents the thrust being produced by the system to equal the torque ...
The C.30 looked like a steam-punk mash-up of pre-World War II-era aircraft. The fuselage featured a single open cockpit, forward-mounted radial engine, and tailwheel landing gear. It looked like a biplane fuselage, but the wings were replaced by a rotor mounted above the cockpit.
Oct 12, 2017 · There was immediate speculation that the accident was caused, ironically, by the experienced helicopter pilot instinctively applying left pedal on landing. Just four days later, however, McCulloch test pilot Jim Reichert “duplicated the malfunction,” rolling over in N4304G (s/n 14) on the runway at Fox Field in Lancaster, California.
The helicopter community has been plagued during the latest forty years by accidents due to unanticipated yaw, also called Loss of Tail rotor Effectiveness (LTE). How the problem was identified and what answers were given are first reconstructed from period documents and Airbus experience.
Apr 23, 2022 · Delivered from 1942 onwards, these helicopters played a crucial role in Anti-Submarine Warfare (ASW) and Intelligence, Surveillance, and Reconnaissance (ISR) missions. They acted as scouts,...
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Mar 25, 2013 · The rotors rotated in opposite directions, cancelling out the torque that would otherwise tend to spin the aircraft in flight. Like modern helicopters, the Fw 61 could vary the pitch of the blades for directional control, but vertical control depended on using the throttle to vary the rotor rotation speed (most helicopters maintain relatively ...
