Blade CX3 Police-MD520N & Blade400 instant canopy assembly idea

Blade(400)Fast canopy assembly idea & MD 520N CX3 Police was first coaxial to incorporate a heading lock gyro!Interesting. Short video if both and Worlds largest training cross! You can fly the E-flite Blade CX2/3 with the Spektrum DX6/DX7..

The use of directed air to provide anti-torque control had been tested as early as 1945 in the British Cierva W.9. During 1957, a Spanish prototype designed and built by Aerotecnica flew using exhaust gases from the turbine instead of a tail rotor. This model was designated as Aerotecnica AC-14. Development of the NOTAR system dates back to 1975, when engineers at Hughes Helicopters began concept development work.[2] In December 1981, Hughes flew a OH-6A fitted with NOTAR for the first time. The OH-6A helicopter (serial number 65-12917) was supplied by the U.S. Army for Hughes to develop the NOTAR technology and was the second OH-6 built by Hughes for the U.S. Army. A more heavily modified version of the prototype demonstrator first flew in March 1986 (by which time McDonnell Douglas had acquired Hughes Helicopters). The original prototype last flew in June 1986 and is now at the U.S. Army Aviation Museum in Fort Rucker, Alabama.

A production model NOTAR 520N (N520NT) was later produced and first flew on May 1, 1990. It later crashed on September 27, 1994 when it collided with an AH-64D while flying as a chase aircraft for the Apache.
[edit] Concept
Diagram showing the movement of air through the NOTAR system.
1 Air intake 2 Variable pitch fan 3 Tail boom with Coanda Slots 4 Vertical stabilizers 5 Direct jet thruster 6 Downwash 7 Circulation control tailboom cross-section 8 Anti-torque lift

Although the concept, which uses the Coandă effect, took some time to refine, the NOTAR system is simple in theory and works to provide directional control the same way a wing develops lift.[2] A variable pitch fan is enclosed in the aft fuselage section immediately forward of the tail boom and driven by the main rotor transmission. This fan forces low pressure air through two slots on the right side of the tailboom, causing the downwash from the main rotor to hug the tailboom, producing lift, and thus a measure of directional control. This is augmented by a direct jet thruster and vertical stabilisers.
MD 900
Aerotécnica AC-14, Ducted exhaust and rudders detail

Benefits of the NOTAR system include increased safety (the tail rotor being vulnerable), and greatly reduced external noise. NOTAR-equipped helicopters are among the quietest certified helicopters.

There are three production helicopters that utilize the NOTAR system, all produced by MD Helicopters

Category:

Science & Technology

Tags:

• Blade
• CX3
• MD
• 520N
• RTF
• E-flite
• Blade400
• radio
• control
• gold
• coast
• rc
• fliers
• club
• accident
• combat sports
• prank

[jgoudeau207]

@Crash400Am

[Crash400Am]

Hi i have a blade400 too and my question is what kind a gyro you use? i got the stock-ones and think about to buy a futaba clone - what you think about?

[jgoudeau207]

The use of directed air to provide anti-torque control had been tested as early as 1945 in the British Cierva W.9. During 1957, a Spanish prototype designed and built by Aerotecnica flew using exhaust gases from the turbine instead of a tail rotor. This model was designated as Aerotecnica AC-14. Development of the NOTAR system dates back to 1975, when engineers at Hughes Helicopters began concept development work.[2] In December 1981, Hughes flew a OH-6A fitted with NOTAR for the first time.