Airplane weight and balance

JoeNichols

New Member
Joined
Jun 1, 2019
Messages
6
I'm trying to write a formula for a aircraft weight and balance. The rear arm limit remains constant, but the forward limit shifts after reaching a certain weight.

EX: Weight up to 2050 forward limit is 82.0 and rear limit is 93.0. Weights between 2050 and 2550 the forward limit shifts aft at a constant rate from 82.0 to 88.6 while the rear limit remains at 93.0

I've started with this formula:
=IF(B30<=2050,"82.0",IF(B30>2050,(B30-2050)*0.0132+82))

This formula works but if the weight in B30 exceeds 2550 it will continue to shift the forward limit aft past 88.6.

I tried adding this to the formula:
=IF(B30<=2050,"82.0",IF(AND(B30>2050,B30<=2550),(B30-2050)*0.0132+82))

If the weight is over 2550, the cell shows "FALSE".

I tried:
=IF(B30<=2050,"82.0",IF(AND(B30>2050,B30<=2550),(B30-2050)*0.0132+82),IF(B30>2550,"88.6"))

But is says too many arguments for this function and I don't know excel well enough to troubleshoot the formula.

____________________

My goal is that if the weight is over 2550 the forward limit will continue to show 88.6. It will stop shifting aft and not show false.

Thanks for any help you can offer.
 

MickG

MrExcel MVP
Joined
Jan 9, 2008
Messages
14,841
Perhaps:-
Code:
=IF(B30<2050,"82.0",IF(B30>2550,"88.6",IF(AND(B30>2050,B30<=2550),(B30-2050)*0.0132+82)))
 

Rick Rothstein

MrExcel MVP
Joined
Apr 18, 2011
Messages
35,504
Office Version
2010
Platform
Windows
I am pretty sure that this formula will do what you want...

=MAX(82,MIN(88.6,(B30-2050)*0.0132+82))
 
Last edited:

JoeNichols

New Member
Joined
Jun 1, 2019
Messages
6
Thanks Mike. Your formula worked but showed an error. When testing it would sometimes show a forward and aft exceedance at the same time. I appreciate your help, thank you.
 

JoeNichols

New Member
Joined
Jun 1, 2019
Messages
6
Are either of you are interested in another challenge? How can I change the text color (ex; a green "OK" to a red "EXCEEDED")? I don't want the cell background to change color as these may need to be printed and would make them difficult to read.

Thanks in advance for your help.
 

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