zionstrat
Posts: 225
Joined: Sat Apr 28, 2001 3:26 am

What Is The 'handle' On 737 Rear

Sat May 18, 2002 1:11 am

My question is easier to show than to describe- If you look at the rear right fuselage of the first and 3rd 737s, you will notice what appears to be a 'handle' on the right rear fuselage (just aft of the door) and I'd love to know what it is-


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It looks like a release for a hatch or door, but this is just a guess and I can't find anything searching past queries.
 
BA777
Posts: 2048
Joined: Fri Jun 29, 2001 11:40 pm

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 1:21 am

My guess is maybe the APU intake?

I dont honestly have a clue  Sad

BA777
 
broke
Posts: 1299
Joined: Wed Apr 24, 2002 8:04 pm

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 1:25 am

What you call the "handle" is a aerodynamic deflector designed to increase the airflow into the flush inlet mounted on the fuselage. The inlet, itself, was developed by the National Advisory Committee for Aeronautic (NACA and the predecessor of NASA) in the US and the inlet is called a "NACA Inlet". I believe that this inlet is the air intake for the Auxiliary Power Unit (APU) that is mounted in the rear fuselage of the 737. You can see the exhaust of the APU at the extreme rear of the fuselage. The deflector (I'm not sure what Boeing calls it) is needed when operating the APU in flight, but not on the ground. The APU provides air for engine starts and air conditioning and electrical power on the ground. In flight, it provides electrical power when one of the engine driven generators is inoperative or is a back-up to the engine driven generators when making precision approaches in bad weather. The later use is required for what are known as CAT 3 approaches.
 
LMP737
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Joined: Wed May 08, 2002 4:06 pm

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 1:26 am

BA777 is right, the handle you speak of is the inlet for the APU.
Never take financial advice from co-workers.
 
zionstrat
Posts: 225
Joined: Sat Apr 28, 2001 3:26 am

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 1:37 am

That's ironic- Apu intake was my first guess until I got a close look at one this weekend and decided it would generate too much drag for an intake- Shows that I can't visualize NACA inlets very well.

Not the first time I've been fooled- I always thought that the P51 belly airscoop looked like a ridiculous source of drag until I learned that it was actually quite clean apparently due to the NACA spec-

Thanks for the fast replies!
 
OPNLguy
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Joined: Tue Jun 15, 1999 11:29 am

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 2:36 am

Another view... (Crafty folks, those NACA/Boeing types..)


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ALL views, opinions expressed are mine ONLY and are NOT representative of those shared by Southwest Airlines Co.
 
airplay
Posts: 3369
Joined: Sat Oct 25, 2003 1:58 am

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 2:53 am

Well...you learn something new on this forum everyday!

I always wondered where the term "NACA scoop/inlet" came from.

 
EssentialPowr
Posts: 1646
Joined: Wed Sep 06, 2000 10:30 pm

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 9:28 am

The underside, wing tank dynamic pressurization inlets of most Boeing designs (727 in particular) are a NACA design as well. They're optimized, of course, to prevent ice buildup while minimizing drag.

Cheers-
 
IMissPiedmont
Posts: 6200
Joined: Wed May 23, 2001 12:58 pm

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 10:56 am

And if you look closely, you will notice the "concorde wing" in front of the inlet.
The day you stop learning is the day you should die.
 
KCLE
Posts: 673
Joined: Fri Feb 23, 2001 11:03 am

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 1:24 pm

Since we are talking about the rears of 737's, what are those series of pipes on the top of the fuselage right next to the rudder? There are four pipes on each side of the rudder, protruding from the fuselage about 6 inches. They are all in a column. I haven't seen any good pics of these things, but I myself have an excellent pic of them, but I'm too lazy to scan it and try to find a web site to load them to.
 
LMP737
Posts: 4808
Joined: Wed May 08, 2002 4:06 pm

RE: What Is The 'handle' On 737 Rear

Sat May 18, 2002 3:15 pm

There called vortex generators.
Never take financial advice from co-workers.
 
bio15
Posts: 1048
Joined: Fri Mar 23, 2001 8:10 am

RE: What Is The 'handle' On 737 Rear

Sun May 19, 2002 11:49 am

Kcle, I know this great website you can upload your picture to... I don't quite remember the name,,...........uh........ gues it's http://www.airliners.net ! lol  Smile upload your pic!
 
KCLE
Posts: 673
Joined: Fri Feb 23, 2001 11:03 am

RE: What Is The 'handle' On 737 Rear

Sun May 19, 2002 1:04 pm

Bio15, believe me, I'd like to upload it here, but it's not good enough for this site, even any other plane pic page.

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