VMCG less than VMCA

[rudderrudderrat]

Hi JT & SP, I've copied and pasted some values below for A319 & A321.
It's interesting to note the minimum V2 compared with min VAPP.
On the GA from Flaps Full, the normal config. is Flaps 3.

So which VMCA do we refer to with Airbus figures; V2 VMCA or VAPP VMCL?

Hope these figures shed some light, sorry about the table spacing - but the extra spaces are stripped out when posted.

A321 MINIMUM CONTROL SPEEDS @ Sea level
VMCA (KT CAS) = 114
VMCG (KT IAS) Conf 1+F = 110, CONF 2 = 110, CONF 3 = 108.5

SPEEDS LIMITED BY VMC

Takeoff speeds all have a minimum value limited by control. These minimum values are given in the tables down below.
Minimum V1 CONF 1+F = 115, CONF 2 = 115, CONF 3 = 113
Minimum VR CONF 1+F = 121, CONF 2 = 121, CONF 3 = 119
Minimum V2 CONF 1+F = 126, CONF 2 = 125, CONF 3 = 125


V2 LIMITED BY VMU/VMCA
________________________________________
The following tables, one per configuration, provide the V2 limited by minimum unstick speed and minimum control speed in the air.

MINIMUM V2 LIMITED BY VMU/VMCA (KT IAS)
CONF 1+F
046 050 055 060 065 070 075 080 085 090 093 Take off Weight (tons)
125 125 127 133 138 143 148 152 156 161 164 Speed


MINIMUM V2 LIMITED BY VMU/VMCA (KT IAS)
CONF 2
046 050 055 060 065 070 075 080 085 090 093 Take off Weight (tons)
124 124 124 125 130 135 139 143 147 151 154 Speed


MINIMUM V2 LIMITED BY VMU/VMCA (KT IAS)
CONF 3
046 050 055 060 065 070 075 080 085 090 093 Take off Weight (tons)
124 124 124 124 124 129 133 137 140 145 147 Speed

A 321 V App QRH 4.00A
Weight inTons 052 056 060 064 068 072 076 080 084 088 092 094
VLS CONF Full 116 121 125 129 133 137 141 144 148 151 155 157
VLS CONF3 kt 121 125 130 134 138 142 146 150 154 157 161 163


A319 MINIMUM CONTROL SPEEDS @ sea level
VMCA (KT CAS) = 108
VMCG (KT IAS) Conf 1+F = 104.5, CONF 2 = 104.5, CONF 3 = 104.5

SPEEDS LIMITED BY VMC
Takeoff speeds all have a minimum value limited by control. These minimum values are given in the tables down below.
Minimum V1 CONF 1+F = 110, CONF 2 = 110, CONF 3 = 110
Minimum VR CONF 1+F = 113, CONF 2 = 113, CONF 3 = 113
Minimum V2 CONF 1+F = 120, CONF 2 = 119, CONF 3 = 120

V2 LIMITED BY VMU/VMCA
The following tables, one per configuration, provide the V2 limited by minimum unstick speed and minimum control speed in the air.

MINIMUM V2 LIMITED BY VMU/VMCA (KT IAS)
CONF 1+F
035 040 045 050 055 060 065 070 075 080 Takeoff Weight (tons)
119 119 119 119 122 128 133 138 142 147 Speed


MINIMUM V2 LIMITED BY VMU/VMCA (KT IAS)
CONF 2
035 040 045 050 055 060 065 070 075 080 Takeoff Weight (tons)
119 119 119 119 119 122 126 131 136 141 Speed


MINIMUM V2 LIMITED BY VMU/VMCA (KT IAS)
CONF 3
035 040 045 050 055 060 065 070 075 080 Takeoff Weight (tons)
119 119 119 119 119 119 123 128 133 137 Speed

A 319 V App QRH 4.00A
Weight in Ton 044 048 052 056 060 064 068 072 076
VLS CONF Full 108 113 117 122 126 130 134 138 142
VLS CONF3 kt 113 118 123 128 132 137 141 145 149

44 Tons Vref = 108 kts (**Vref is limited by VMCL)

VMCG : Minimum speed, on the ground during takeoff, at which the aircraft can be controlled by only using the primary flight controls, after a sudden failure of the critical engine, the other engine remaining at takeoff power.
VMCA : Minimum control speed in flight at which the aircraft can be controlled with a maximum bank of 5°, if one engine fails, the other engine remaining at takeoff power (takeoff flap setting, gear retracted).
VMCL : Minimum control speed in flight, at which the aircraft can be controlled with a maximum bank of 5°, if one engine fails, the other engine remaining at takeoff power (approach flap setting).