# What speed is Vmca?

## What speed is Vmca?

Definition. Vmca is defined as the minimum speed, whilst in the air, that directional control can be maintained with one engine inoperative (critical engine on two engine aerolanes), operating engine(s) at takeoff power and a maximum of 5 degrees of bank towards the good engine(s).

What is the difference between VMO and Vne?

Vne is indeed associated with piston planes and Vmo with turbines (including turboprops). Vmo is expressed in knots and is generally a constant. At some altitude (the knee altitude), the limit is expressed in Mach so you have Mmo.

Why is Vmca lower than VMCG?

VMCG is demonstrated at close to zero angle of attack. VMCA is demonstrated at as low a speed as possible IN-AIR, and thus at as high an angle of attack as can be achieved.

### Can V1 be higher than Vmca?

V1 is also the minimum speed at which a pilot can continue a takeoff after an engine failure. If an engine failure is detected after V1, the takeoff must be continued. This implies that the aircraft must be controllable on ground. Therefore, V1 is always greater than VMCG.

What is the difference between VMO and MMO?

VMO is a structural limitation ( not to broke a part of the airframe, say for ex. the windshield) and is increasing with altitude, and MMO is an aerodynamic limitation (not to get supersonic on wings) and does nor vary. Hope it helps! We have types where Mmo does vary with altitude; it is not a given that it be fixed.

What is VMMO?

Acronym. Definition. VMO/MMO. Maximum Operating Limit Speed (velocity; aviation)

#### How is VMO calculated?

How is VMO /MMO determined? VMO/MMO is derived from the design limit Mach/speed VD/MD by applying a margin related to aircraft dive characteristics.

Can V1 be higher than VMCA?

Can V1 be greater than Vr?

No. V1 can be equal to Vr, but not greater than it.

## Can V2 occur before VR?

VR IN A NUTSHELL: Do not start rotation below or above VR. V2 is the minimum take-off speed that the aircraft must attain by 35 feet above the runway surface with one engine failed at VEF, and maintain during the second segment of the take-off.