What is the minimum speed that a helicopter must achieve before entering IMC during take-off, according to GM3 NCC.OP.110?

The speed before entering IMC should be above the minimum authorised speed in IMC, Vmini, which is a limitation in the AFM. The lowest speed before entering IMC is the highest of Vtoss (take-off safety speed) and Vmini.

If a helicopter's Vtoss is 45 kt and Vmini is 60 kt, how should the take-off minima be adjusted?

The take-off minima have to include the distance to accelerate to 60 kt, and the take-off distance should be increased accordingly.

Why is it necessary to ensure a certain speed before entering IMC during helicopter take-off?

To ensure sufficient control of the helicopter in IMC, the speed before entering IMC should be above the minimum authorised speed in IMC, Vmini.

What is the relationship between Vtoss and Vmini in determining the lowest speed before entering IMC for a helicopter take-off?

The lowest speed before entering IMC is the highest of Vtoss (take-off safety speed) and Vmini.

In the example given in GM3 NCC.OP.110, what is the take-off safety speed and what is the minimum authorised speed in IMC?

In the example, Vtoss is 45 kt and Vmini is 60 kt.

GM3 NCC.OP.110 Aerodrome operating minima

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GM3 NCC.OP.110 Aerodrome operating minima – general

ED Decision 2013/021/R

TAKE-OFF MINIMA — HELICOPTERS

To ensure sufficient control of the helicopter in IMC, the speed, before entering in IMC, should be above the minimum authorised speed in IMC, V_mini. This is a limitation in the AFM. Therefore, the lowest speed before entering in IMC is the highest of V_toss (take-off safety speed) and V_mini.

As example, V_toss is 45 kt and V_mini 60 kt. In that case, the take–off minima have to include the distance to accelerate to 60 kt. The take-off distance should be increased accordingly.

Details

Source-Title: GM3 NCC.OP.110 Aerodrome operating minima - general View latest amendments

Erulesid: ERULES-1963177438-13536 Compare versions

Domain: Air operations

Applicabilitydate: 23 August, 2013

Entryintoforcedate: 23 August, 2013

Regulatorysource: ED Decision 2013/021/R Navigate

Regulatorysubject: Part-NCC

Typeofcontent: GM to IR (Guidance material to implementing rule)

Parentir: NCC.OP.110 Aerodrome operating minima -- general

Origin: EASA

Category: EAR