jetcareers - View Single Post

B767Driver · October 13th, 2006, 09:15

My performance charts do not include the rate of descent during DD. However, my experience in the simulator is that the DD rate of descent is very low....just hundreds of feet per minute. The airplane at FL310 will decelerate pretty quickly to DD speed. Let's just say within one minute.

The airplane at FL350 would have to descend at 4000fpm to reach FL310 and begin it's descent simultaneously with the FL310 guy. Then they would descend identically to DD altitude.

It doesn't seem logical to me. It could be true. I'll be interested to hear back from those with more detailed data.

October 13th, 2006, 09:15	#4
B767Driver Old Skool Join Date: Sep 2003 Posts: 1,960	Re: Single engine driftdown. My performance charts do not include the rate of descent during DD. However, my experience in the simulator is that the DD rate of descent is very low....just hundreds of feet per minute. The airplane at FL310 will decelerate pretty quickly to DD speed. Let's just say within one minute. The airplane at FL350 would have to descend at 4000fpm to reach FL310 and begin it's descent simultaneously with the FL310 guy. Then they would descend identically to DD altitude. It doesn't seem logical to me. It could be true. I'll be interested to hear back from those with more detailed data.