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B737-300 Initial Climb after Liftoff

 
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K.Haroon
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PostPosted: Thu Feb 07, 2008 3:11 am    Post subject: B737-300 Initial Climb after Liftoff Reply with quote

Two Engine:

After liftoff, the flight director commands pitch to maintain an airspeed of V2 + 20 knots until another pitch mode is engaged. V2 + 20 is the optimum climb speed with takeoff flaps. It results in the maximum altitude gain in the shortest distance from takeoff. Acceleration to higher speeds reduces the altitude gain. If airspeed exceeds V2 + 20 during the initial climb, stop the acceleration but do not attempt to reduce airspeed to V2 + 20. Any speed between V2 + 15 and V2 + 25 knots results in approximately the same takeoff profile. Cross check indicated airspeed for proper initial climb speed.

Single Engine:

After liftoff the flight director commands a minimum of V2, or the existing speed up to a maximum of V2 + 20. The initial climb attitude should be adjusted to maintain a minimum of V2. If an engine fails at an airspeed between V2 and V2 + 20, climb at the airspeed at which the failure occurred. If engine failure occurs above V2 + 20, increase pitch to reduce airspeed to V2 + 20 and maintain until flap retraction altitude.
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