Hi ahramin,
Like tdracer, I haven't flown the A330, unfortunately. So can you explain under what circumstances the Ground Spoilers, which are normally activated on touchdown by main-wheel spin-up, would only half-deploy?
Hi tdracer,
Perhaps we have to distinguish between the in-flight situation, when the a/c tends to rotate around its C of G, and the on-the-ground situation where its weight is mostly being supported by its main-wheels on the ground?
In the latter case (on the ground), it will rotate around the main-wheel axles as a pivot point.** Despite the chaotic airflow created by the fan-reverser deployment, the rearward thrust vector it produces is presumably directed above the pivot point. That should produce a slight pitch-up, but I cannot pretend to have noticed it on the A310 or A320.
Early main-wheel braking certainly generates a pitch-down which has to be countered with elevator to avoid a hard touchdown of the nose-wheels. On the A320, for example, medium autobrake tends to start before nose-wheel touchdown.
**[EDIT] In this case, probably the attachment point between the main-gear leg and the main-wheel truck (bogie)?
Last edited by Chris Scott; 4th Dec 2016 at 11:00.