Effect of negative-g on aircraft
Effect of negative-g on aircraft
(OP)
As I understand, positive G-forces have significant effects upon the aircraft (increase loads etc).
What are the effects of negative G-forces upon the aircraft?
What are the effects of negative G-forces upon the aircraft?





RE: Effect of negative-g on aircraft
Just the same in the opposite direction however most designers take out the normal 1-G on the negative side. So you would have a working load of say 4-G pos 3-G neg.
B.E.
RE: Effect of negative-g on aircraft
RE: Effect of negative-g on aircraft
However if you are designing for negative G you use floppy pickups on fuel and oil.
B.E.
RE: Effect of negative-g on aircraft
RE: Effect of negative-g on aircraft
This again comes back to whether, or not, the aircraft is designed for inverted flight. On most aircraft that are not designed for this the engine will cut out very quickly and severe damage can be done when the oil pump runs dry at high rpm. For most designers on normal category aircraft the worst negative loads appear when encountering sharp edged gusts which are usually of short duration.
B.E.
RE: Effect of negative-g on aircraft
The engine cases are always difficult as even if you maintain fuel feed, using an inverted flight accumulator or something, oil flow is still different and few engines can put up with that for long. I suppose you'd have to consider the cg shift with fuel in the top of the tanks too.