767 no flaps takeoff

MoabMic

Well-Known Member
Anyone know why a 767 would make a no flaps takeoff? My dad just came back and out of Amsterdam they had a no flaps takeoff? He asked me and I didn't know? Anyone?
 

A300Capt

Freight Dawg
Probably a flaps 5 t/o. The slats are extended but the flaps don't appear to be extended at all. They were probably very heavy.
 

A300Capt

Freight Dawg
Not necessarily.

The reason we use less flaps if departing heavy and/or at a high altitude density airport, is for better climb performance during the second segment.

We always plan for worse case scenario. For a twin engine jet the most critical segment is the 2nd segment. This is the point between when the landing gear is fully retracted and reaching the engine out clean up altitude (usually between 400-1000'agl or obstacle clearance alt). Our performance numbers (Rwy limit weights and climb limit weights) allow for a minimum of a 2.4% climb gradient in the second segment in the event of an engine failure before V2.

Less flaps allow for higher climb limit weights due to less drag (this is usually the limiting factor over Rwy limit weights). If the rwy is short we may use more flaps but at the expense of 2nd segment penalties. It's all a trade off and is sometimes a balancing act using performance charts between flap and power settings, rwy and climb limit weight limits.

Clear as mud?
 

Minuteman

“Dongola”
767-200s can do a Flaps 1 takeoff, which, if I'm not mistaken, doesn't use any trailing edge flaps.

767-300s have a minimum of Flaps 5.
 
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