CV990
Topic Author
Posts: 4224
Joined: Sat May 22, 1999 3:49 am

The Tallest 707!

Tue Dec 12, 2006 10:35 pm

Hi!

I always had the feeling that the 707-400 was taller than the other 707 versions, and a few weeks ago I confirmed that, indeed the 707-400 is the tallest 707, and that comes to a question, why the 400 series had a different tail than the other versions?
I wait your feedback.
Regards
CV990, the Maserati of the skies!
 
User avatar
SOBHI51
Posts: 3771
Joined: Wed Jun 04, 2003 1:32 pm

RE: The Tallest 707!

Tue Dec 12, 2006 10:45 pm

707-400 is there such a plane?
I am against any terrorist acts committed under the name of Islam
 
MYT332
Posts: 7285
Joined: Mon Sep 08, 2003 7:31 pm

RE: The Tallest 707!

Tue Dec 12, 2006 10:49 pm

Quoting SOBHI51 (Reply 1):
707-400 is there such a plane?

Er, ya!


View Large View Medium
Click here for bigger photo!

Photo © John M. Wheatley

One Life, Live it.
 
PenPusher
Posts: 56
Joined: Thu Oct 12, 2000 7:06 am

RE: The Tallest 707!

Tue Dec 12, 2006 10:58 pm

For the young ones among you, the 707-400 was the Rolls Royce of the 707's, ie it was powered by Rolls Royce Conway engines and operated by BOAC, Varig and Air India and maybe others but I can't remember just now
 
User avatar
SOBHI51
Posts: 3771
Joined: Wed Jun 04, 2003 1:32 pm

RE: The Tallest 707!

Tue Dec 12, 2006 11:09 pm

You learn something new everyday. Thanks
I am against any terrorist acts committed under the name of Islam
 
User avatar
Scooter01
Posts: 1187
Joined: Tue Nov 28, 2006 11:06 pm

RE: The Tallest 707!

Tue Dec 12, 2006 11:34 pm

Hi CV990!

Quoting CV990 (Thread starter):
707-400 was taller than the other 707 versions

The 420 was just as tall as the 320b and 320c at 42ft 5in, the 320 was 41ft 8in

Quoting PenPusher (Reply 3):
For the young ones among you, the 707-400 was the Rolls Royce of the 707's, ie it was powered by Rolls Royce Conway engines and operated by BOAC, Varig and Air India and maybe others but I can't remember just now

The 420 was operated by BOAC (19), Lufthansa (5), ElAl (3), Air India (6) and VARIG (3)

Hope this is some help for you
Scooter
There is always a good reason to watch airplanes
 
User avatar
jetjack74
Posts: 6607
Joined: Sun Jul 27, 2003 6:35 am

RE: The Tallest 707!

Wed Dec 13, 2006 3:18 am

Quoting CV990 (Thread starter):
why the 400 series had a different tail than the other versions?

Because it flew at higher altitudes than the 707-100/200, and incurred higher levels of turbulance, with the conway engines having a higher rate of air bypassing the engine nacelle and with the CAA requiring a taller fin, Boeing engineers installed the larger ventral fin. Later on, the surviving JT4-powered 707-200/300's were fitted with larger ventral fins to provide better stability control at cruise altitudes.
TWA 707-331 with a large ventral fin

View Large View Medium
Click here for bigger photo!

Photo © Bob Garrard

AF 707-328 in the original configuration before mods 1 year later.

View Large View Medium
Click here for bigger photo!

Photo © Mel Lawrence


The JT3D engines being broader and longer requiring a smaller or no ventral fin, like those found on the 707-100B, and -300B/C(for which it was an option)
TWA 707-331B with no ventral fin.

View Large View Medium
Click here for bigger photo!

Photo © Frank C. Duarte Jr.


BA 707-436

View Large View Medium
Click here for bigger photo!

Photo © Howard Chaloner



Quoting Scooter01 (Reply 5):
The 420 was operated by BOAC (19), Lufthansa (5), ElAl (3), Air India (6) and VARIG (3)

Actually, BA/BOAC had 22 707-400's
20 707-436
02 707-465, G-AWRD/AWRE from Cunard/British Eagle

[Edited 2006-12-12 19:55:19]
Made from jets!
 
cf6ppe
Posts: 238
Joined: Fri Mar 31, 2006 12:09 pm

RE: The Tallest 707!

Wed Dec 13, 2006 1:07 pm

While the ventral fins added more lateral area aft for stability, the ventral fins also prevented over rotation of the aircraft during take-off.

Popular Searches On Airliners.net

Top Photos of Last:   24 Hours  •  48 Hours  •  7 Days  •  30 Days  •  180 Days  •  365 Days  •  All Time

Military Aircraft Every type from fighters to helicopters from air forces around the globe

Classic Airliners Props and jets from the good old days

Flight Decks Views from inside the cockpit

Aircraft Cabins Passenger cabin shots showing seat arrangements as well as cargo aircraft interior

Cargo Aircraft Pictures of great freighter aircraft

Government Aircraft Aircraft flying government officials

Helicopters Our large helicopter section. Both military and civil versions

Blimps / Airships Everything from the Goodyear blimp to the Zeppelin

Night Photos Beautiful shots taken while the sun is below the horizon

Accidents Accident, incident and crash related photos

Air to Air Photos taken by airborne photographers of airborne aircraft

Special Paint Schemes Aircraft painted in beautiful and original liveries

Airport Overviews Airport overviews from the air or ground

Tails and Winglets Tail and Winglet closeups with beautiful airline logos