What is tha maximum acceptable touchdown V/S acceptable ?

[cagarini]

In normal operations, crew should report to maintenance a hard landing if the V/S at touchdown, of the main gears, is above ?

In PSX, is there a limit above which the gears can receive damage ? What kind of damage, apart from, eventually, some blown tires ?

[Avi]

I read here in the past that landing rate should be between 0 to 300 fps.
Pilots don't know their V/S at touchdown so I guess they report heavy landing by feeling and experience.

In PSX you can get landing gear damage if V/S is too high at touchdown.

Cheers,

[Hardy Heinlin]

In PSX, a nose-gear-first landing will break the nose gear, or even cause a fatal damage if the nose hits the ground very hard.

Tires may burst when the main wheels land with the parking brake set.

Hard landings will activate the ELT (listen on 121.5).

Very hard landings will cause fatal damage.

What counts is not the barometric altitude rate but the terrain closure rate.


Cheers,

|-|ardy

[evaamo]

Hard landings will activate the ELT (listen on 121.5).

Happens in smaller, general aviation aircraft as well. The siren of shame according to some flight instructors I know 

[cagarini]

Ok,

will have to try it :-)

Thx for the replies.

[emerydc8]

600 FPM at max landing weight and 360 FPM at max takeoff weight.

From 14 CFR Part 25:

Sec. 25.473 Ground load conditions and assumptions.

(a) For the landing conditions specified in Secs. 25.479 through 25.485, the following apply:

(1) The selected limit vertical inertia load factors at the center of gravity of the airplane may not be less than the values that would be obtained--

(i) In the attitude and subject to the drag loads associated with the particular landing condition;

(ii) With a limit descent velocity of 10 f.p.s. at the design landing weight (the maximum weight for landing conditions at the maximum descent velocity); and

(iii) With a limit descent velocity of 6 f.p.s. at the design takeoff weight (the maximum weight for landing conditions at a reduced descent velocity).

[cagarini]

Thx for the detail emery ;-)