Re: 737: Take-off without flaps?

Date:         01 Dec 96 04:08:53 
From:         ei7gm@iol.ie (Paul Kearney)
Organization: Ireland On-Line
References:   1
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"Bernie Gracy, Jr." <bgracy@worldnet.att.net> wrote:

: In September 1993, I was on a USAir 737-200 departing from Bradley
: International to BWI.  When it was announced that we were number 1 for
: takeoff and the engines were throttling up, I noticed the flaps weren't
: down.  I alerted the flight attendant, who alerted the captain via the
: cabin phone, who then put down the flaps as we began to roll down the
: runway!

: Can a 737 take off without flaps down?  The captain claimed we were in no
: danger.  What is proper procedure? Aren't the flaps supposed to come down
: after pushback and engine start but before reaching the taxiway?

Most aircraft should "tell" the pilots that the flaps are not out far enough
when the pilots shove the throttles forward.
(Assuming the  bleeper is also working )
If the pilot tries to take off with say  less-than-5-degrees ( the limit
isnt certain bu I think 5 is the minimum it will allow for a take off )
of flaps and  shoves the throttles forward past a magical angle where it can
be safely assumed that the pilot wants to take off then the bleeper
should go off which is a intermittent 'horn' .
Physically , an aircraft can take off with no-flaps as long as you have plenty
of runway and plenty of noise-tolerant people living near the airport.

There are graphs used to figure these things out , which plot the power
required against weight-of-aircraft / length-of-runway / slope-of-runway
/ flaps needed/wanted and a load of othe rothings.... if you can stick your
pencil inside the "safe area" then your OK otherwise start losing
cargo/fuel/passengers or wait for a stronger wind !