Topic Author
Posts: 2579
Joined: Tue May 18, 2004 11:57 am

T-tail Aircraft Takeoff Angle

Mon Jan 10, 2005 8:39 am

Ive noticed that mose boeing aircraft or wing mounted engined aircraft dont cimb very steeply (except for the 757). on the other hand, almost every md80, dc9, or erj i see takeoff uses a very steep climb angle for about a minute or so. Why is this?
Posts: 9576
Joined: Sun Nov 23, 2003 7:09 am

RE: T-tail Aircraft Takeoff Angle

Mon Jan 10, 2005 12:08 pm

I'm going to give you a generalized response here, so approach it with some caution.

We all, all airlines, all types, pretty much take off and climb the same way. We accelerate through the V-speeds and we rotate and take off and then we climb out. The initial climb is usually at the calculated V2 speed plus an additive, let's say, typically maybe plus twenty knots. This puts us pretty close to L/DMAX.

We hold that speed pretty close, until accelerate height, or flap retract height. At that altitude, maybe a thousand feet above the airport, more in some places, we will accelerate through flap retraction and maintain no more than 200 Knots indicated until passing 3000' AGL. Then we will accelerate to no more than 250 knots until reaching 10,000' MSL.

Little variances here or there, but that is pretty close to the deal. Now, the fly each of those speeds requires a very different body angle, or deck angle according to the airplane type. Another factor is thrust/weight ratio and wing loading. So the angles you are seeing are just what is required to fly the profile.

As I say, a generalized response but it should shed some light on this.

Happiness is not seeing another trite Ste. Maarten photo all week long.
Topic Author
Posts: 2579
Joined: Tue May 18, 2004 11:57 am

RE: T-tail Aircraft Takeoff Angle

Mon Jan 10, 2005 1:08 pm

thanks, the particular planes i see do go out each day with about the same loads so this explains it all.

Who is online

Users browsing this forum: FGITD, shamrock137 and 1 guest

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos