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737-300 No bleeds T/O thrust increase

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737-300 No bleeds T/O thrust increase

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Old 3rd May 2004, 11:54
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737-300 No bleeds T/O thrust increase

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!
Hachiouji-shi is offline  
Old 3rd May 2004, 12:40
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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.
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Old 3rd May 2004, 13:34
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You can find the info on the 737-300 QRH Quick reference handbook....
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Old 3rd May 2004, 20:56
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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.
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Old 4th May 2004, 10:02
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weight increase

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?
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Old 4th May 2004, 16:23
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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.
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