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727 Captain >> 727 Captain >> How to calculate fuel in FSX
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Message started by EdwardS on Feb 17th, 2012 at 9:12pm

Title: Re: How to calculate fuel in FSX
Post by LOU on Feb 18th, 2012 at 4:03pm
Windplayer,

After takeoff segment complete (flaps retracted and out of 1,500 feet), set climb power and climb at 250 knots (or faster depending on local rules) to 10,000 feet. Reduce pitch to accelerate to 290 knots to M.76 or so (you can use cruise Mach for climb if weight & FPM permits) up to planned cruise altitude.

As I've said I had all those charts and dumped them many years ago - rats! :'(

You could adjust climb speed for head wind or tail wind or if you were running late you might speed up in climb to get back on time. Since the 727 had no auto throttles, in the early days you had to keep an eye on the EPR as you climbed and make small adjustments. Later on in the life of the 727-200 airlines added a PMS (performance management system) which was actually pretty good at keeping optimum EPR during climb & cruise. It was a simple computer which you could feed weight information and it would read the SAT and make calculations and move the throttles during climb and cruise.

All the information about calculation of fuel is the same for all planes. Just the numbers are different. You have a max takeoff and landing weight and a max zero fuel weight. Just plug in the fuel burn and reserves and away you go. Sure temperature, load & balance will affect the numbers, but the logic is still the same for all planes.

Lou

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