747400sp
Topic Author
Posts: 3900
Joined: Sat Aug 09, 2003 7:27 pm

Intake On The Side Of DC-8s Noses?

Mon Mar 01, 2010 8:31 pm

Why do DC-8s has a intake on each side of their nose cone?
 
BladeLWS
Posts: 358
Joined: Wed Dec 14, 2005 12:41 pm

RE: Intake On The Side Of DC-8s Noses?

Mon Mar 01, 2010 8:40 pm

I'd have to say that its either for equipment cooling, A/C packs, or both.
 
fr8mech
Posts: 6886
Joined: Mon Sep 26, 2005 9:00 am

RE: Intake On The Side Of DC-8s Noses?

Mon Mar 01, 2010 8:51 pm

On the -7X series aircraft, they are the ram air inlets for the packs. On the other models that are the inlets for the turbo-compressors.
When seconds count...the police are minutes away.
 
Viscount724
Posts: 19315
Joined: Thu Oct 12, 2006 7:32 pm

RE: Intake On The Side Of DC-8s Noses?

Tue Mar 02, 2010 12:09 am

Quoting fr8mech (Reply 2):
On the -7X series aircraft, they are the ram air inlets for the packs. On the other models that are the inlets for the turbo-compressors.

A few previous threads on same subject probably have some further details.
DC-8, DC-10, L-1011 Nose "Air Intake"? (by Mr Spaceman May 22 2001 in Tech Ops)
Douglas DC-8 Inlets On Nose (by HAWK21M Dec 14 2004 in Tech Ops)
Question On Nose Intakes On Douglas DC-8 (by LTU932 Mar 28 2007 in Tech Ops)
RE: What Are The DC8's Large Nose Air Intakes For? (by Broke Aug 6 2003 in Tech Ops)
RE: UPS DC-8 Nose Inlets (by Pilotpip Feb 12 2004 in Tech Ops)
RE: DC-8 Nostrils (by Dtwclipper Sep 11 2004 in Tech Ops)

The turbocompressor inlets on the DC-8 nose (-10 through -60 series models) are equivalent to the inlets at the front of the engine pylons on 707s where the turbocmpressors are in the pylons of engines 2/3/4. The 720 only has 2 turbocmpressors above engines 2 and 3. AA also ordered their 707s with only 2 turbocompressors, thus the narrow pylon on engine #4 on AA 707s. I believe a very few other 707s may have been built with only 2 turbocompressors.

707s with the usual 3 turbocompressors on engines 2/3/4 and the narrow pylon on #1.


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AA 707s with the missing turbocompressor on engine #4.


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