sidestick - different inputs

[ICT_SLB]

Originally Posted by Gary Lager

BAe Systems is currently undergoing development of 'active-stick' technology where sticks are driven/cross-coupled but still retain the features of the FBW sidestick system.

Bombardier originally used a Sterling active sidestick (as recommended by NASA) in their ACT (Active Control Technology) demonstrator but had another version from Lear Siegler for the full flight testing. The software allowed all the required cues such as stick shaker, other stick etc to be programmed in. The demonstrator (Challenger A/C 3991 - ex A/C 1003) was retired to the Canada Aviation Museum in Rockcliffe, Ont. earlier this year.
http://www.aviation.technomuses.ca/c...enger604.shtml

If you're wondering where the sidestick is, it was mounted on the Pilot's side console (just out of frame in the cockpit view). The lefthand yoke was made demountable for the trials.

[FlightDetent]

Originally Posted by Airbus38

So if both pilots pull hard back at the same time do you get double the pitch rate according to the fact that its a 'summation'?

No, because to total sum is still limited to the magnitude equivalent to single full stick deflection.

Aircraft are not flown by watching steering column deflection, nor by watching control surfaces deflection. Aircraft are flown by setting their attitude which is availible on the attitude indicator. Fact is that on a FBW Airbus there is no other option.

In the LH incident described, the PNF had the benefit of a doubt and took over just in time having no other indication than his PFD. It is a stupid speculation, but imagine if he saw the PF apply correct (in a conventional sense) displacement of controls, 30 (or as I hear 15) centimetres worth of confusion could have been the difference between life and death.

About a month later Turkish AF had a fatal accident with medim size transport turboprop, which left maintenance with crossed controls.


FD.
(the un-real)

[dartagnan]

remember your first flying lesson, if the capt says "I have control", answer "you have control",... and that 's all.

no need of stick computers and green or red flashing lights!