View Full Version : 737-300 No bleeds T/O thrust increase
Hachiouji-shi
3rd May 2004, 11:54
How much more thrust can one obtain by doing a bleeds off take off on a 737-300 ? How many percent increase in N1 % can one get ?
By the way, where do we find such information?
Thanks!
TopBunk
3rd May 2004, 12:40
Not sure about the thrust increase, but I seem to recall on the 737-200 bleeds off resulted in about 1000kgs extra weight to be lifted off the runway.
2FLYEU
3rd May 2004, 13:34
You can find the info on the 737-300 QRH Quick reference handbook....
AFAIK, the 'standard' Boeing 737 3/4/5 increase is 600kg, unless your performance guys calculate SPECIFIC aerodrome data when it will be more.
N1s are typically 1% higher bleeds off.
Hachiouji-shi
4th May 2004, 10:02
Thank you so much for all the postings. Managed to find the 1% increase in N1 in the QRH. But what about weight increases? Where can we get those information?
That depends on the runway analysis charts for the specific airports...
I'm afraid there's no fixed value, and as BOAC says it's in the range of 600-900kg more or less.