EMBQA From United States of America, joined Oct 2003, 9400 posts, RR: 10
Reply 1, posted (10 years 1 month 2 weeks 5 days 10 hours ago) and read 4394 times:
Quoting IAH744 (Thread starter): I never thought bucket reverse redirected enough power to push an aircraft backwards.
Is there something else that helps?
Oh, heck yea it will. You apply slight fwd thrust, then pull reverse thrust. The reverse thrust will back the aircraft out. You need to be careful with the amount of thrust applied and the breaking as you can put the plane on its tail if your not careful.
"It's not the size of the dog in the fight, but the size of the fight in the dog"
SkySurfer From United Kingdom, joined Sep 2004, 1146 posts, RR: 11
Reply 2, posted (10 years 1 month 2 weeks 5 days 10 hours ago) and read 4383 times:
I did this last year on an NWA DC-9 at MSP......slight roll forward, then the buckets are deployed and back we go. Light braking to stop (as EMBQA rightly said, too hard and you'll end up on the tail) and after the buckets are stowed away you go. Waste of fuel? Maybe. But if there's no tug available then it's more than worth it using fuel for a 10-20 second powerback. I'm glad i experienced one.
In the dark you can't see ugly, but you can feel fat
GoBoeing From United States of America, joined Jun 2000, 2816 posts, RR: 14
Reply 5, posted (10 years 1 month 2 weeks 5 days 9 hours ago) and read 4292 times:
Northwest only permits powerbacks at the three hubs that DC-9s visit - MSP, DTW, and MEM. Furthermore, there are gates at each of those airports that powerbacks are not allowed to be performed from (too small an alley, close side-by-side arrangements, etc.).
The pilots know beforehand from the ground crew if they'll be doing a powerback and they inform ramp control of this upon initial contact after receiving the clearance. When the clearance for the powerback is given the ramper in front of the cockpit gives the ready-to-go signal and puts his goggles on.
Both pilots take their feet off of the rudder pedals and put them on the floor. The captain pushes the power just enough to breakaway thrust and rolls the jet forward a few feet to get the tires off of the soft spots so that minimal reverse thrust is needed. After moving forward these couple of feet, he or she goes back to idle and thing brings both engines into reverse thrust and keeps an eye on the ramper ahead of the cockpit who is now giving the both-hands-twirling "continue powering back" signal. I was pretty surprised at how fast it moves backwards after watching it the first few times from the jumpseat. It continues and the two wingwalkers will give a signal to the cockpit ramper that it's time to stop. He will signal that to the cockpit and the captain takes off the reverse thrust and lets idle thrust bring the jet to a stop. A little forward thrust and by this time the FO is already getting the taxi clearance.
OttoPylit From , joined Dec 1969, posts, RR:
Reply 6, posted (10 years 1 month 2 weeks 5 days 9 hours ago) and read 4274 times:
Who says powerbacks have to be limited to DC-9 series aircraft? 737-200's are fully capable of powerbacks, as long as you are willing to suffer the consequences of everything on the ramp not secured down by steel pilings to be sucked into the engines, such as halon fire extinguishers, chocks, ramp agents, orange cones, and wands.
The pilot of Palm 90 attempted to help the ground crew during pushback by using the reverse thrusters to get the plane moving. All he managed to end up doing was throw more ice and slush up onto the tops of the wings, which were to play a part in its fall from the sky over Washington D.C. shortly afterward on January 13, 1982.
I'm sure I've read in similar threads here in the past that pretty much any aircraft equipped with thrust reversers can power back, it just isn't practiced on aircraft with under wing mounted engines for various reasons. I'm sure someone here can offer a more in depth explanation.
Edith in his bed, a plane in the rain is humming, the wires in the walls are humming some song - some mysterious song