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Forum: Tech Log

7th Jan 2017, 09:08

Replies: 67

Why have a Max Zero Fuel Mass?

Views: 24,083

Posted By Owain Glyndwr

@ChuChu The first action then would be wing...

@ChuChu

The first action then would be wing twisting, not bending.
Two remarks:

Throughout the wing the fuel is more or less equally distributed fore and aft of the wingbox structural...

Forum: Tech Log

6th Jan 2017, 16:24

Replies: 67

Why have a Max Zero Fuel Mass?

Views: 24,083

Posted By Owain Glyndwr

Meikleour There was no substantial beefing up....

Meikleour
There was no substantial beefing up. The initial design weights were chosen to make the loads equivalent allowing for the extra bending relief from the outboard engines. Plus of course...

Forum: Tech Log

6th Jan 2017, 14:55

Replies: 67

Why have a Max Zero Fuel Mass?

Views: 24,083

Posted By Owain Glyndwr

@Meikleour I see a subtle difference between...

@Meikleour

I see a subtle difference between a "Variable ZFW schedule" and a straight choice of MZFW from a list of alternatives. The former gives a lot more operational flexibility if written...

Forum: Tech Log

6th Jan 2017, 11:28

Replies: 67

Why have a Max Zero Fuel Mass?

Views: 24,083

Posted By Owain Glyndwr

Meikleour: Good question, but I'll need time to...

Meikleour: Good question, but I'll need time to think about it. I'll get back to you

PS, just to be sure I don't say something stupid, do you know what the associated fatigue lives were?

Forum: Tech Log

6th Jan 2017, 09:20

Replies: 67

Why have a Max Zero Fuel Mass?

Views: 24,083

Posted By Owain Glyndwr

@ChuChu No, you are quite right, MZFW is...

@ChuChu

No, you are quite right, MZFW is simply a means of limiting the weight in the fuselage.
I am not sure what you meant by fuel close inboard, but any fuel loaded outboard of the wing root...

Forum: Tech Log

5th Jan 2017, 08:51

Replies: 67

Why have a Max Zero Fuel Mass?

Views: 24,083

Posted By Owain Glyndwr

@ Chris Scott, Metro-man It seems then that...

@ Chris Scott, Metro-man

It seems then that the MTOW on the latest A320s has grown to the point where manoeuvre load alleviation is beneficial; augmented by the fact that sharklets will pull the...

Forum: Tech Log

4th Jan 2017, 14:39

Replies: 67

Why have a Max Zero Fuel Mass?

Views: 24,083

Posted By Owain Glyndwr

Gentlemen, At the risk of some repetition: ...

Gentlemen,
At the risk of some repetition:
MZFW. is selected by the manufacturer. The choice may depend on several things other than wing bending moment.
MZFW is made up of an empty weight plus a...

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