PPRuNe Forums - View Single Post - Cold weather climb performance: fact or fiction?
Old 7th Dec 2003, 08:52
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Black Baron
 
Join Date: Nov 2003
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Boeing 767 -300 cf6-80
brw 150 tonnes
climb to FL 370

ISA +10> clb / 18 minutes over 115 miles

ISA +10> clb 2/ (reduced climb) 21 minutes over 132 miles

ISA +15 clb / (fulll climb ) 20 minutes over 130 miles

ISA +15 clb 2 / 24 minutes over 151 miles

ISA +20 clb / 23 minutes over 155 miles

ISA +20 clb 2 / 27 minutes over 179 miles

clb2 represents a 20% thrust deduction to 10,000 feet decreasing linearly to Max climb thrust at FL 300

I think it is then fair to say that a 5'C rise in temperaure equals a 20% or greater loss of thrust available, and visa versa.


Last edited by Black Baron; 7th Dec 2003 at 09:15.
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