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Odd Object On DC8 Nose  
User currently offlineQANTAS747-438 From United States of America, joined Jan 2001, 1963 posts, RR: 2
Posted (2 years 2 months 2 weeks 1 day 18 hours ago) and read 3116 times:

In the Hawaii Five-O original 1968 opening are several shots of DC-8s including a fisheye shot of one. In the video, at precisely :30 thru :31 seconds, is the fisheye shot with an object attached to the nose. Here's a shot of it as well. What is that?




My posts/replies are strictly my opinion and not that of any company, organization, or Southwest Airlines.
10 replies: All unread, jump to last
 
User currently offlinepliersinsight From United States of America, joined May 2008, 494 posts, RR: 0
Reply 1, posted (2 years 2 months 2 weeks 1 day 17 hours ago) and read 3091 times:

Air conditioning on the ground?

Didn't the nose of the DC-8 contain ports responsible for the pressurization system and cooling of the compressed air as it didn't use engine bleed as is done today?


User currently offlineStarlionblue From Greenland, joined Feb 2004, 17039 posts, RR: 66
Reply 2, posted (2 years 2 months 2 weeks 1 day 14 hours ago) and read 3008 times:

Quoting pliersinsight (Reply 1):
Didn't the nose of the DC-8 contain ports responsible for the pressurization system and cooling of the compressed air as it didn't use engine bleed as is done today?

Yepp. Same as on top of the 707 engine intakes (3 of them if memory serves).



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlinelonghauler From Canada, joined Mar 2004, 4985 posts, RR: 42
Reply 3, posted (2 years 2 months 2 weeks 1 day 13 hours ago) and read 2900 times:

Are you sure that's a DC-8 nose? It doesn't look like one to me.

Quoting pliersinsight (Reply 1):
Didn't the nose of the DC-8 contain ports responsible for the pressurization system


Yes, there were 4 Turbo Compressors under the cockpit. They were powered by engine bleed air, and as you state, they pressurized the aircraft.

There were large air inlets on the nose, two on each side. I would have thought you would see them with the shot shown.

When gound cooling air was added, it was attached to the underside right side, just forward of the wing, not on the nose.

Quoting Starlionblue (Reply 2):
Same as on top of the 707 engine intakes (3 of them if memory serves).


Yes, in the early days, it was thought that engine bleed air was not "safe" enough to pressurize the aircraft directly. As you state, there were 3 on the B707, (except AA which had 2) and 2 on the B720.



Never gonna grow up, never gonna slow down .... Barefoot Blue Jean Night
User currently offlineCrosswind From United Kingdom, joined Nov 2000, 2598 posts, RR: 58
Reply 4, posted (2 years 2 months 2 weeks 1 day 12 hours ago) and read 2885 times:
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View Large View Medium
Click here for bigger photo!

Photo © Allan Rossmore


This photo seems to show what you're talking about, as well as the ground air-conditioning hose that longhauler mentions.

I suspect the hose attached to the nose is the HP line supplying pressurised air for engine start, but could well be wrong on that!

Regards
CROSSWIND


User currently offlineViscount724 From Switzerland, joined Oct 2006, 25323 posts, RR: 22
Reply 5, posted (2 years 2 months 2 weeks 1 day 7 hours ago) and read 2716 times:

Quoting longhauler (Reply 3):
Quoting Starlionblue (Reply 2):
Same as on top of the 707 engine intakes (3 of them if memory serves).


Yes, in the early days, it was thought that engine bleed air was not "safe" enough to pressurize the aircraft directly. As you state, there were 3 on the B707, (except AA which had 2) and 2 on the B720.

I believe at least a few other carriers also had only 2 turbocompressors on 707s. I've read that Air India only had 2 on their original 707-420s (R-R Conways) but on those engines you couldn't tell visually as the engine pylons were the same, whether or not they contained a turbocompressor, unlike the JT3D pylons..


User currently onlinefr8mech From United States of America, joined Sep 2005, 5445 posts, RR: 14
Reply 6, posted (2 years 2 months 2 weeks 1 day 5 hours ago) and read 2658 times:

Quoting Crosswind (Reply 4):
I suspect the hose attached to the nose is the HP line supplying pressurised air for engine start, but could well be wrong on that!

It's the airstart hose. Not really HP air. Looking at 35-40 psi with high volume.

The yellow hose in 4 is conditioned air.

And, I'm sure that's not an 8 in the OP.

[Edited 2012-07-05 15:27:05]


When seconds count...the police are minutes away.
User currently offlinelonghauler From Canada, joined Mar 2004, 4985 posts, RR: 42
Reply 7, posted (2 years 2 months 2 weeks 1 day 5 hours ago) and read 2634 times:

Looking at the Eastern DC-8 in Reply 4, I change my mind, I think in the OP it is a DC-8.

Look at where the air-start hose is attached, not the yellow conditioned air hose, but the smaller hose attached between the air inlets for the TCs. (I missed it the first time).

Now imagine, using a fish eye lens, from the area of the nose gear looking up and ahead, and you would get the image shown. The two TC air inlets would be the "bumps" on either side of the hose, and the rest of the nose you wouldn't see because of the angle.



Never gonna grow up, never gonna slow down .... Barefoot Blue Jean Night
User currently offlineWrenchBender From Canada, joined Feb 2004, 1779 posts, RR: 8
Reply 8, posted (2 years 2 months 2 weeks 1 day 5 hours ago) and read 2621 times:

It is indeed Engine Starting Air hookup.

WrenchBender



Silly Pilot, Tricks are for kids.......
User currently onlinefr8mech From United States of America, joined Sep 2005, 5445 posts, RR: 14
Reply 9, posted (2 years 2 months 2 weeks 1 day 2 hours ago) and read 2567 times:

Quoting longhauler (Reply 7):
Looking at the Eastern DC-8 in Reply 4, I change my mind, I think in the OP it is a DC-8.

I don't know...the gear doors don't look right for a DC-8. The fisheye may be screwing up my perspective, but they just don't look like DC-8 gear doors.



When seconds count...the police are minutes away.
User currently offlinelonghauler From Canada, joined Mar 2004, 4985 posts, RR: 42
Reply 10, posted (2 years 2 months 2 weeks 1 day ago) and read 2499 times:

I checked my old DC-8 manuals, and yes indeed, that is where the air-start hose is attached ... between the TC air inlets on the nose. It makes sense, as every start will be a start with external pneumatic air, may as well make it some where well clear of the engines. (At least with earlier DC-8s)

Not like today, when an external pneumatic air start requires that only one engine be started as the hose is attached between the engines, and the truck must be parked near one of the engines.



Never gonna grow up, never gonna slow down .... Barefoot Blue Jean Night
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