Talking performance stuff

[Eagle7907]

In what example would a mudhen takeoff with a very forward CG? I see the CFTs being empty does play a part in it, but would having no stores also push it farther? My intuition says yes, but I’m not that familiar with military airframes.
 
Edit:exclude any mechanical faults. Looking for examples where a takeoff in this condition is just by normally loaded and operated.
 
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[jaylw314]

Malfunctioning fuel transfer pumps would do it.

[Eagle7907]

Malfunctioning fuel transfer pumps would do it.

But would you takeoff and fly a mission in that state? I imagine if someone caught the discrepancy before takeoff, it would be a return to a hangar or flight line for a repair, but what would be a condition where there is no mechanical fault. I should’ve been more specific.


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[jaylw314]

2 minutes ago, Eagle7907 said:

But would you takeoff and fly a mission in that state? I imagine if someone caught the discrepancy before takeoff, it would be a return to a hangar or flight line for a repair, but what would be a condition where there is no mechanical fault. I should’ve been more specific.


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It does seem that CFT's and external stores generally move the CG rearwards.  I'm not aware of any publicly available Weight & Balance info, so you won't get specifics, but I did see an example that with a typical air-to-air loadout and empty CFT's, the CG was near (but not at) the forward CG limit.

[Eagle7907]

It does seem that CFT's and external stores generally move the CG rearwards.  I'm not aware of any publicly available Weight & Balance info, so you won't get specifics, but I did see an example that with a typical air-to-air loadout and empty CFT's, the CG was near (but not at) the forward CG limit.

Right. So I ASSUME the only time a mudhen would take off with a forward CG is CFTs empty and a clean jet. However I’d like confirmation if that is correct. I’m seeking this knowledge for documenting purposes and module enhancement.


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