Categories

Special Recent Posts

Our heavyweight helicopter equal in the world does not have

Our heavyweight helicopter equal in the world does not have

In Rostov started production of the most load-lifting rotary-wing car The Russian holding «Helicopt[...]
In Italy broke experimental tiltrotor

In Italy broke experimental tiltrotor

The experimental military man конвертоплан, developed by "August Vestland's" company, brok[...]
The old plane — nonsense, pilots think - there was an attack

The old plane — nonsense, pilots think - there was an attack

In spite of the fact that the main version of crash of the Russian plane of the Kogalymavia company [...]
The Israeli Apache will subject to peeling

The Israeli Apache will subject to peeling

The Israeli shock Boeing AH-64 Apache helicopters will undergo "peeling" procedure. As rep[...]
The aviation industry began to move

The aviation industry began to move

On Monday against Dubai Airshow air show - the 2015th Deputy Prime Minister Dmitry Rogozin blew up t[...]

MAXIMUM DECELERATION

Posted by admin in Helicopter Performance, Stability, and Control on March 31, 2016

At speeds near hover, the deceleration capability is equal and opposite to the acceleration capability but in high speed flight, the capability may be limited by

Speed, knots

FIGURE 5.14 Maximum Longitudinal Acceleration Capability

rotor autorotation at some overspeed limit usually specified by structural design to be 10-20% over normal rotor speed. The procedure for calculating the deceleration capability under this limitation using the rotor charts of Chapter 3 are, as follow:

• Assume that CT/o = Cr/o.

• For even values of tip speed ratio, find 0O at Cq/o = 0.

• Find СЦ-рр from charts.

Calculate

COS ttTpp

• Find new 0O at Cq/o = 0.

• Convert CT/o to T at applicable tip speed.

• Convert Cj/a to H at applicable tip speed.

• Convert tip speed ratio into speed and dynamic pressure, q.

• Calculate the deceleration capability from the equation:



Related Posts: