Originally Posted by
green guard
MZFW is a SUM of maximum payload added to aircraft that has or has not any fuel.
You mean traffic load?
However, it's not the formula that bothers me, rather the
practical use of MZFM. A/C can be limited either on take off by MTOM or on landing by MLM, but what a MZFM limitation on take-off represents? Ensuring wings won't bend in scenario we lose all fuel in flight? I wonder 2 things:
- How often MZFM limited MTOM happen in a real world? How often have you had to reduce your TOM due to MZFL limit?
- Is it a limit load, or the safety factor is reduced? In other words, if such a scenario zero-fuel in flight happens, and we're at the MZFM, does the limit ensure the wing won't bend permanently, or they will bend but not fail completely?