QANTAS747-438 From United States of America, joined Jan 2001, 1808 posts, RR: 2 Posted (11 months 2 weeks 4 days 22 hours ago) and read 2413 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.
pliersinsight From United States of America, joined May 2008, 452 posts, RR: 0 Reply 1, posted (11 months 2 weeks 4 days 21 hours ago) and read 2388 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?
Starlionblue From Hong Kong, joined Feb 2004, 15904 posts, RR: 66 Reply 2, posted (11 months 2 weeks 4 days 19 hours ago) and read 2305 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." - from Citadel by John Ringo
longhauler From Canada, joined Mar 2004, 4316 posts, RR: 36 Reply 3, posted (11 months 2 weeks 4 days 17 hours ago) and read 2197 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
Viscount724 From Switzerland, joined Oct 2006, 21679 posts, RR: 23 Reply 5, posted (11 months 2 weeks 4 days 12 hours ago) and read 2013 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..
fr8mech From United States of America, joined Sep 2005, 4346 posts, RR: 12 Reply 6, posted (11 months 2 weeks 4 days 10 hours ago) and read 1955 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.
longhauler From Canada, joined Mar 2004, 4316 posts, RR: 36 Reply 7, posted (11 months 2 weeks 4 days 9 hours ago) and read 1931 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
fr8mech From United States of America, joined Sep 2005, 4346 posts, RR: 12 Reply 9, posted (11 months 2 weeks 4 days 7 hours ago) and read 1864 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.
longhauler From Canada, joined Mar 2004, 4316 posts, RR: 36 Reply 10, posted (11 months 2 weeks 4 days 4 hours ago) and read 1796 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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