NJTurnpike
Topic Author
Posts: 565
Joined: Mon May 01, 2000 8:24 pm

767 Ram Air Turbine

Fri Sep 08, 2000 5:32 pm

I was intrigued to learn of the 'RAT' fitted to 767s; a fan device giving emergency hydraulic power to an aircraft, enabling the crew to perform a dead-stick landing. The story of the Air Canada 'Gimli Glider' is at

http://www.frontier.net/~wadenelson/successstories/gimli.html

It's quite a read, I'd highly recommend it. Are there any more stories like the one above, describing successful use of the RAT? Seems quite surprising that it's not been talked about more often, it seems like a device that really could be put into more widespread use on other airliners. Has the RAT been implemented elsewhere? Thanks for any answers you can give,

~NJTurnpike

 
NJTurnpike
Topic Author
Posts: 565
Joined: Mon May 01, 2000 8:24 pm

RE: 767 Ram Air Turbine

Fri Sep 08, 2000 5:34 pm

Sorry, don't know how my topic font became bold - it wasn't on purpose!

~NJTurnpike
 
UAL Bagsmasher
Posts: 1839
Joined: Wed Sep 08, 1999 12:52 pm

RE: 767 Ram Air Turbine

Fri Sep 08, 2000 9:46 pm

I know for a fact that the B757 has a RAT as well.
 
777X
Posts: 850
Joined: Fri Dec 19, 2014 12:44 am

RE: 767 Ram Air Turbine

Fri Sep 08, 2000 9:49 pm

they are also present on A310 & B777 (Probably on A330 as well)
 
boomer
Posts: 108
Joined: Thu May 27, 1999 2:59 am

RE: 767 Ram Air Turbine

Sat Sep 09, 2000 6:12 am

RATs are also used on L-1011 for hydraulic power. It is located along the aircraft centerline just forward of the main wheelwells.

The DC10 and MD11 aircraft have a deployable propeller driven device called an ADG (air driven generator) that produces electric power. The electric power can be used to power electric hydraulic pumps and very limited instruments and radio, or no hydraulic pumps with a larger assortment of electric equipment. The ADG is located on the lower right side of the fuselage next to the right nose landing gear door.
 
VC-10
Posts: 3546
Joined: Tue Oct 26, 1999 11:34 am

RE: 767 Ram Air Turbine

Sat Sep 09, 2000 6:58 am

The A330/340 has the RAT in the #4 Flap Fairing on the RH wing.

The VC10 has a RAT driven elect. generator under the fuselage/wing ctr section.

There is one story of a VC10 crew flying between (I think) HKG & NRT where the F/E was distracted during a fuel transfer and managed to feed all the engines off one tank until the tank was empty. When the engines flamed out they dropped the RAT to recover electrical power until they could get the engines started again. Now the RAT can only be stowed on the ground so they had the choice of either returning to HKG or continuing. As they wanted to keep the 'faux pas' quiet they elected to continue but thought it best to contact Maintenance Control in London to check they could fly normally with the RAT down. Maintrol's first question was "Why did you have to deploy the RAT ?"
 
crjmech
Posts: 257
Joined: Wed Jun 07, 2000 6:31 am

RE: 767 Ram Air Turbine

Sat Sep 09, 2000 9:10 pm

The Canadair RJ is also equipped with an ADG, located on the right-hand side of the nose just aft of the radome. It deploys automatically when both engine IDGs and the APU generator go south. The crew can also manually deploy the unit. We occasionally have to test the ADG operation and since we lack the equipment necessarry to spin it up on the ground, we perform a test flight. What a racket! Both inside the cockpit and on the ground the noise is unmistakable. The ADG is also a good way to yank the chain of a green F/A or ramper. Many have been told that it is a trolling motor for water landings or an auxillary taxiing motor.
Thou shalt mind thine altitude,lest the ground reach up and smite thee.
 
NJTurnpike
Topic Author
Posts: 565
Joined: Mon May 01, 2000 8:24 pm

RE: 767 Ram Air Turbine

Sun Sep 10, 2000 2:37 am

Great replies everyone, I'm now on the lookout for a picture or diagram of a RAT or ADG. If you know of any, please let me know..

Thanks!

~NJTurnpike

 
TomH
Posts: 950
Joined: Thu May 27, 1999 4:13 am

RE: 767 Ram Air Turbine

Sun Sep 10, 2000 5:43 am

Ram Air Turbines have been used on military aircraft, especially fighters, for forty years or more. There is a long history of their succesful use. The F-16 Emergency Power Unit (EPU) works through the action of a gas stored aboard the aircraft.
 
Guest

RE: 767 Ram Air Turbine

Sun Sep 10, 2000 7:10 am

The 757 also has a RAT, I know this because my supervisor was reaching for the battery switch in the cockpit but hit the RAT switch, anyways, the thing popped out, and he got in trouble. The 737s don't have one because they are able to fly without hyd pressure.
 
riosul
Posts: 20
Joined: Sat Mar 30, 2013 7:35 am

RAT Picture

Sun Sep 10, 2000 11:16 am

Hey NJTurnpike,

I just typed "Ram Air Turbine" into yahoo and I found this site. It has a brief description of RATs, a picture, and a view of a RAT sticking out of some type of RJ.

http://ww3.hamiltonsundstrandcorp.com/aerospace/products/ram_air_turbine.htm

Hope this helps,

RioSul 
 
NJTurnpike
Topic Author
Posts: 565
Joined: Mon May 01, 2000 8:24 pm

RE: 767 Ram Air Turbine

Mon Sep 11, 2000 5:08 pm

Thanks RioSul, unfortunately the page won't open for me right now, but I'll try later.

~NJTurnpike
 
jim
Posts: 448
Joined: Thu Jul 29, 1999 8:12 am

RE: 767 Ram Air Turbine

Tue Sep 12, 2000 5:04 am

There was one other case of a RAT deplyment on a 767 that I know about. The time that the DAL flight crew 'accidentally' turned off the engines after leaving LAX. The RAT auto-deployed, and the crew got the engines started again, and then continued on to CVG. The RAT was damaged by being run for 4 hours!
 
Guest

RE: 767 Ram Air Turbine

Wed Sep 13, 2000 9:03 am

There is a picture of a RAT on an A310 on this website. Select A300/310 in the photo section and then select the accident category. Scroll through the thumbs and you will eventually see it.
 
crjmech
Posts: 257
Joined: Wed Jun 07, 2000 6:31 am

RE: RAT Picture

Wed Sep 13, 2000 12:46 pm

The RJ in question is a series 200 CRJ with it's ADG deployed. The ADG is the old "wet" type that uses fluid pressure to adjust blade pitch, maintaining optimum generator speed. The newer "dry" type uses a purely mechanical governor. The AC generator is visible in the photo. It's located at the top of the ADG strut.
Thou shalt mind thine altitude,lest the ground reach up and smite thee.

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