Why haven't shrouded tail rotors or no tail rotor (NOTAR) designs taken over in the helicopter market? Most choppers in production are still using unshrouded tail rotors. - Quora
BELL 205/212/412/HUEY2 TAIL ROTOR DRIVE SYSTEM MAINTENANCE PRACTICES - YouTube
Bell reveals 429 demonstrator with four electric tail rotors | News | Flight Global
Bell's Electrically Distributed Anti-Torque | WordlessTech
Tail rotor - Wikipedia
In the pursuit of Peace and Quiet – Bell's EDAT System
Bell 429 Light Twin Helicopter - Aerospace Technology
Program update: Bell's EDAT electric tail rotor system | Aerospace Testing International
Bell reveals 429 demonstrator with four electric tail rotors | News | Flight Global
Bell's latest innovation, Electrically Distributed Anti-Torque #EDAT! The all electric tail rotor reduces noise pollution, carbon emissions and... | By Savback Helicopters | Facebook
You have questions about Bell's electric tail rotor. We have answers - Vertical Mag
Future Flight: Bell debuts electric tail rotor - AOPA
What is an enclosed helicopter tail rotor? - Quora
Bell Flies Electric Anti-torque on 429 | General Aviation News: Aviation International News
Bell's New Electrically-Powered Helicopter Tail Rotor Could Be A Game-Changer
Bell advances electric tail rotor concept, but stays cautious on production timeline | Analysis | Flight Global
Bell's new helicopter may look strange, but it could reduce accidents and noise
Ground demonstration of the Electrical Tail Rotor for Green Rotorcraft - YouTube
Bell's New Electrically-Powered Helicopter Tail Rotor Could Be A Game-Changer
Bell's Electrically Distributed Anti-Torque #EDAT - YouTube
Active Blades, Electric Tail Rotor Tested By Leonardo | Aviation Week Network
HeliHub.com : Bell to receive $275 million as Canada invests in aerospace recovery - HeliHub.com
