December 28, 201213 yr Dear experts, was using topcat for takeoff stats for the ngx cdu when it computed flaps 25 TO derate +38C on LOWI; I think it was 3C at the time. i was a bit sceptical but seems to get up to speed and pitchup quickly. would that be realistic i know LOWI runway is short (ish) but 25?? anyway twas a lovely flight to heathrow, nice landing into 27R tia -rclad
December 28, 201213 yr flaps 25 for takeoff is a bit "heavy". I know real 737 Pilots use between flaps 10-15 on a regular basis, pretty rare if flaps 25 is used on short takeoff, just watch your airspeed as you climb.
December 28, 201213 yr Pilots use between flaps 10-15 I thought airlines used flaps 1 or 5 for normal takeoffs and additional flaps if needed. Kenny Lee"Keep climbing"
December 28, 201213 yr A friend of mine who flies 737's for Delta says the most common setting he uses is 10-15. flaps 5 is for when he is leaving from airports that have long runways during the summer time. I personally use between flaps 10-15 on a regular basis, again I really don't see much problem with using flaps 25 as long as its needed (colder weather and shorter runways dictate a greater flap extension) as long as you check your speed.
December 28, 201213 yr would that be realistic i know LOWI runway is short (ish) but 25?? Well there is a massive difference in size and weight between the 737-600 and the 737-900 Seems like a unrealistic take off config, to me BUT the joys of FSX and the PMDG means you can endulge yourself in this way, and experiment. You can fly it 'realistically - unrealistically' if you want. J u l ia n D i a m a n d i s
December 28, 201213 yr A friend of mine who flies 737's for Delta says the most common setting he uses is 10-15. flaps 5 is for when he is leaving from airports that have long runways during the summer time. I personally use between flaps 10-15 on a regular basis, again I really don't see much problem with using flaps 25 as long as its needed (colder weather and shorter runways dictate a greater flap extension) as long as you check your speed. I think you mean flap 5 is used during winter? -Iain Watson-
December 28, 201213 yr I can see flaps 25 causing some issues on the takeoff run, with drag... i agree with you, if there's an option on topcat to takeoff with flaps 25 doesn't mean you can do it, it's a lot of drags, and can cause many problems.also, i have never heard that the normal config is flaps 10-15, the normal is definitely flaps 5, but it can be easily 15, depends. i rememmber my friend telling me he takes off with flaps 15 from innsbruck (737-800) which seems pretty reasonable. cheers. Daniel choen
December 28, 201213 yr At American we almost always use flaps 1 for takeoff. If weight or runway length are an issue we will use flaps 5. Flaps 15 is rare. In the last year we bought the flaps 25 data from Boeing and ever since then every time I have flown out of KSNA we have done flaps 25 takeoffs. I'm not sure why because we used to do primarily flaps 5 and rarely flaps 15 out of there but there is no real drag induced performance issue that I've noticed with flaps 25. Tom Landry
December 28, 201213 yr Alaska uses flaps 5 for almost all takeoff operations. Flaps 25 is used in LIH, OGG, BLI, and a couple others due to Take Off Weight and RWY length. Ryan Syferd (KSEA)
December 28, 201213 yr Alaska uses flaps 5 for almost all takeoff operations. Flaps 25 is used in LIH, OGG, BLI, and a couple others due to Take Off Weight and RWY length. Interesting...
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