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An-124/225 Engines  
User currently offlineSovietjet From Bulgaria, joined Mar 2003, 2608 posts, RR: 16
Posted (11 years 3 days 7 hours ago) and read 1855 times:
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I've heard several times that an An-124 or -225 runs its engines at max for a couple of minutes when it's on the runway before takeoff. Why do they do that?

6 replies: All unread, jump to last
User currently offlineN243NW From United States of America, joined Jul 2003, 1632 posts, RR: 20
Reply 1, posted (11 years 3 days 6 hours ago) and read 1840 times:

I've never heard that. Do they "run up" one or two engines at a time, or do all of them run up at once? The latter would put an enormous strain on the brakes, I assume. I don't even know why a jet run-up would be necessary. I'm curious as well.
-N243NW (My 100th post!) Big grin

[Edited 2003-09-16 23:17:50]

B-52s don't take off. They scare the ground away.
User currently offlinePositive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 2, posted (11 years 3 days ago) and read 1812 times:

I've seen in-cockpit footage of an AN-225 taking off and the pilots applies FULL power to all 6 engines at once. The jetblast behind is very severe and would probably damage a plane lined up behind it.

User currently offlineAlessandro From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 2 days 23 hours ago) and read 1808 times:

Depends on the temperature outside the airplane I guess?

User currently offlineSSTjumbo From , joined Dec 1969, posts, RR:
Reply 4, posted (11 years 2 days 22 hours ago) and read 1803 times:

In my enthusiastic passenger experience, I took off from O'Hare 31R enroute San Francisco, and we applied full throttle before rolling (UA 747-200). Coming back, the pilot flying a UA 747-400 decided to take off to the north, whatever runway that is, though I know it's comparitavely short, and we pretty much made a casual takeoff without any rnwy run-up. In conclusion, I don't know why they do or don't do it.

User currently offlineConcordeBoy From , joined Dec 1969, posts, RR:
Reply 5, posted (11 years 2 days 8 hours ago) and read 1742 times:

Forgive my ignorance: but what type of engines are on the AN225 and what are their trust ratings?

User currently offlineSovietjet From Bulgaria, joined Mar 2003, 2608 posts, RR: 16
Reply 6, posted (11 years 2 days 8 hours ago) and read 1742 times:
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6 ZMKB Progress Lotarev D-18T turbofans each engine makes 51,590 pounds of thrust. Total thrust is 309,540 for the An-225. The An-124 has 4 D-18s.

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