LZ-TLT From Germany, joined Apr 2001, 431 posts, RR: 0 Posted (12 years 2 days 4 hours ago) and read 2868 times:
I was spotting at Dusseldorf some time ago and chanced to see a Citation(can't resemble exact which series) land. What suprised me was, that the pilot retracted the thrust attenuators first when rolling to its parking position, a long time since he turned off the runway...definitively some 1.5 kilometers he taxied the plane with the attenuators deployed.
Is it a standart procedure with the Citation or have I chanced to see something unusual for some reason? Which are the normal conditions for the use of the attenuators?
(For those of yours which are familiar with DUS - the a/c landed on runway 05L and retracted the attenuators rolling on the parallel taxiway to the 05R/23L in front of terminal A).
DesertJets From United States of America, joined Feb 2000, 7673 posts, RR: 18 Reply 1, posted (12 years 2 days 3 hours ago) and read 2844 times:
The thrust attenuators are used on the Citation Jet, CJI, and CJII. They are a part of a lift dump system used on landing where the flaps retract to FLAPS 60 and spoilers retract. When thrust is at idle or very near idle on taxi the attenuators remain out in order to control taxi speed, apparently those little Williams FJ44s put out a decent amount of power at idle.
Stop drop and roll will not save you in hell. --- seen on a church marque in rural Virginia
CV640 From United States of America, joined Aug 2000, 948 posts, RR: 6 Reply 4, posted (11 years 12 months 4 days 1 hour ago) and read 2803 times:
I've actually heard good things about those engines Jetguy. You are right, I am a little suspect of them, if they fail on a cruise missle, just goes down as another miss. Fails on an aircraft and........
DesertJets From United States of America, joined Feb 2000, 7673 posts, RR: 18 Reply 5, posted (11 years 12 months 4 days 1 hour ago) and read 2804 times:
I have another take about the Williams engine... after sitting under the deck of a Guided Missle Cruiser or under the wing of a B-52 the damn thing better light when it is supposed to. Plus these engines have been flying on the CJ's since 1994 on several hundred C-525s.
Jjbiv: the thrust attenuators on the Citation are basically paddles aft of the engine exhaust that deploy to reduce the amount of rearward thrust.
Airgypsy From United States of America, joined Nov 1999, 129 posts, RR: 2 Reply 6, posted (11 years 12 months 4 days ago) and read 2803 times:
Same little thrust attenuators as on the T-37 Tweet. On the tweet you keep the throttle up on approach with them out so you can avoid the time stopping and heart stopping wait for the engines to spool up. They double as thrust decay for taxi.
You've seen an aircraft taxi with reversers deployed!