Darius From Netherlands, joined Jul 2001, 141 posts, RR: 0 Posted (12 years 2 months 4 weeks 15 hours ago) and read 1966 times:
Can any body tell me why the slats of an A310 are often (but not always) deployed when the a/c is at the gate? All other a/c I know retract the slats after landing (I don't know about the A300 though).
Below two pictures of A310's at a gate, with different slat positions.
ChrisHabgood From , joined Dec 1969, posts, RR: Reply 2, posted (12 years 2 months 3 weeks 6 days 6 hours ago) and read 1794 times:
It may also have to do with the systems on the airplane. The 727 slats are hydraulic powered and they have a big tendency to droop when the pressure is turned off for shutdown as well as other flight control surfaces. This is true for alot of airliners when parked at the gate the stablizer is sitting with different positions on each side(Boeing anyway) as well as ailerons and such. The 747-400 slats are pneumatically powered.
310_engineer From Belgium, joined Dec 2000, 165 posts, RR: 0 Reply 3, posted (12 years 2 months 3 weeks 6 days 5 hours ago) and read 1787 times:
What you are saying is only possible with the Krueger flaps. They are controlled by an hydraulic actuator, but the slats are controlled by screwjacks, gearboxes and torque tubes which are driven by a PDU (Power Drive Unit). The PDU is a sort of hudraulic motor.
ChrisHabgood From , joined Dec 1969, posts, RR: Reply 4, posted (12 years 2 months 3 weeks 3 days 21 hours ago) and read 1722 times:
I wasn't saying it about ONLY the kreuger flaps, it was a comment on the type of system the airplane uses. Alot of airliners control surfaces droop when the hydraulics are turned off and the pressure releases from the controls.
VASI From Germany, joined Aug 2000, 192 posts, RR: 0 Reply 6, posted (12 years 2 months 3 weeks 1 day 9 hours ago) and read 1681 times:
As T know the MD-80 retracts the slats to 15° after landing and when taxiing to the gate and vice versa to the runway. This should prevent the engines from ingesting debris, but I don't know if this is really effective!
VASI From Germany, joined Aug 2000, 192 posts, RR: 0 Reply 8, posted (12 years 2 months 2 weeks 3 days 12 hours ago) and read 1597 times:
I meant slats + flaps. I've seen this on SAS MD-80's
and Iberia MD-87's.
To my knowledge it is also compulsory in the normal "after landing checklist" to set the slats/flaps to 15° degrees after landing, to prevent this foreign object damage. The most importnat phase is during taxi, not at the gate!
ChrisHabgood From , joined Dec 1969, posts, RR: Reply 9, posted (12 years 2 months 2 weeks 1 day 3 hours ago) and read 1577 times:
A major cause for the -80's being taken out of service is ground vehicle operations at least with the passenger airlines. At least at UPS we would NEVER have ground vehicle contact problems with flight control surfaces hanging out due to we NEVER EVER go under a wing/Horizontal stab.
ChrisHabgood From , joined Dec 1969, posts, RR: Reply 10, posted (12 years 2 months 2 weeks 1 day 3 hours ago) and read 1590 times:
I was not rying to get into a discussion about the airbus primarily beacause airbus is SO much different than boeing I have not read up on systems with the airbus. My comments were only based on general systems or specific airplane systems knowledge based on the 727 or 757/767/747-400 type of systems.