Load & Trim sheet - LILAW LIZFW LITOW
 

REQUEST TO KNOW THE MEANING OF FOLLOWING TERMS in LOAD & TRIM -

LILAW 20.18
LIZFW 20.18
LITOW 10.57

All I could dig was LI - 'Laden index' what does it stand for.
Google didn't help
Request any link/document to read them in detail.

Also
1) why is LILAW & LIZFW same in this scenario what it means?
2) How is LITOW so much FWD?
3) is LI described in '%' like CG or just 'units'?

Thank you Sirs

LI - I call it Loading Index, but nobody trained me.

LI LAW: LAnding Weight
LI ZFW: Zero Fuel Weight
LI TOW: Take Off Weight.

The term Weight is being used with tolerance and respect to the previous generations, instead of correct "Mass". LAM, ZFM, TOM would be the same thing in this field, properly named.

Google harder.

1) 20.18 v.s. 20.18 is purely a coincidence, there is no co-relation.
2) significant fuel load forward of centre
3) units, no definition.

Take a look at the image below to define:



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For more info on understanding load sheets and the phrases used I can recommend you google search lobyc.com and on the left hand side ( unless your Spanish is very good) under 'Notes' click on and enjoy.

1) why is LILAW & LIZFW same in this scenario what it means?

The index value depends on the trim datum chosen for the trimsheet and the loading entries. While it would help, greatly, to know the aircraft Type and Model, the reason will be related to fuel arm(s) and quantities between ZFW and LW. Essentially an artefact of the sheet's design.

2) How is LITOW so much FWD?

Impossible to assess without the sheet. This is due to the fact that constant CG lines on the index envelope are sloping .. ie, without the sheet, one cannot necessarily infer what is happening with fuel (or loaded aircraft) arms. It is NOT necessarily valid to infer a more forward CG solely on the basis of the IU value.

3) is LI described in '%' like CG or just 'units'?

Index, depending on the definition, will either be dimensionless (ie just a number without any units) or (less likely) moment units (eg kg.mm), Index will NEVER be in length units, such as CG is.

FD
DAVE
JOHN

THANKYOU for your time and reply helped me understand this better :)