What is this thing on this plane?

I was walking in the park and looked up and saw this: Thing on Air Force plane.

I don’t usually notice planes but it looked different from the normal jet going over.

Radar.

That’s an AWAC plane.

[QUOTE=Boscibo]
I was walking in the park and looked up and saw this: Thing on Air Force plane.

I don’t usually notice planes but it looked different from the normal jet going over.
[/QUOTE]

It’s an Air Force E-3 Sentry AWACS jet based off the 707. The dish on back is a big honkin’ radar unit.

Here’s what Wikipedia says:

If you are talking about the disc on top, it is a RADAR system.

Brian

The aircraft is an E-3 Sentry. The large disk contains a radar antenna.

More on the E-3:
http://www.af.mil/factsheets/factsheet.asp?fsID=98

I know a guy that flew one of those, until he was discharged for a knee injury. Can’t work the rudder pedals with a bum knee.

I think that’s some kind of Radar-thing.

Cool, thanks! I’ve never seen one of those before.I figured it was probably some sort of radar or (I’ve heard of this) a hitchhiking engine, but aren’t those usually carried under the wing?

Boscibo, what on earth is a hitchhiking engine? Do you mean an engine that’s being transported as cargo?

Snakes!
I’m sick of 'em.

[QUOTE=Pork Rind]
The dish on back is a big honkin’ radar unit.
[/QUOTE]
Which can detach from the aircraft and fly into orbit to confuse the Klingons.

[QUOTE=Galwegian]
Boscibo, what on earth is a hitchhiking engine? Do you mean an engine that’s being transported as cargo?
[/QUOTE]

An extra engine in a dummy pod, being transported to the destination, usually for another aircraft.

On a 707

On a 747

There are better pictures out there, but my search-fu is weak.

Going out on a limb here but I think its some sort of radar.

It’s Radar, by Duran Duran.

[QUOTE=Loach]
Going out on a limb here but I think its some sort of radar.
[/QUOTE]

I’ll have to agree here, probably some form of AWACS

I believe it is a Radar In earth Orbit. Ortherwise known as RIO if that helps.

[QUOTE=IAmNotSpartacus]
I’ll have to agree here, probably some form of AWACS
[/QUOTE]

cite

I’m thinkin’ rada…no Arbys!

As an aside, I had no idea that planes transported extra engines on the exterior of the aircraft, especially on the wing! Wouldn’t the plane tend to list to one side?