747 Climb With 4 Eng

[galbracha2000]

Hi' I M Flying The 747-200 But Never Find The Climb Grdiant With 4 Eng Aftr Take Off[ For Sid Req] Any One Have Info About It The Afm And Om Have Info On 3 Eng Climb Gradiant Only - Tnx - Gal

[zerozero]

Hello.

I'd like to help but I'm not sure what you're asking.

Your climb gradient is based on speed and your speed will vary with weight. So there's not just one answer.

Maybe you meant something else? Four engine climb profile?

[galbracha2000]

what i looking is a graff or table to get what will b my climb rate in vary weight and temp
lets say my weight is 350 ton rwy at sea level ,zero wind, temp 25 c , max takeoff power ,what will be my alt after 7 nm? tnx gal

[zerozero]

Well, here's a chart to help with the climb gradient question. It also works backwards for a descent gradient.

All you need to know is what minimum climb gradient is required (in feet/nm) and your *GROUND* speed to determine your rate of climb.

http://avsim.com/geoffschool/airlinecourse/climbgradients.htm

For your second problem you need to consult the performance manual for the type of aircraft your're flying.

There might be a chart called "Time, Fuel and Distance to Climb" or something to that effect.

Good luck.