The 707-320B Advanced is an improved version of the −320B, adding
the three-section leading-edge flaps already seen on the −320C. These
reduced takeoff and landing speeds and altered the lift distribution of the
wing, allowing the ventral fin found on earlier 707s to be deleted. From 1965,
-320Bs had the uprated −320C undercarriage allowing the same
335,000 lb (152,000 kg) MTOW.
These were often identified as 707-320BA-H.
707-420
The 707-420 was identical to
the −320, but fitted with Rolls-Royce
to over-rotate on takeoff,
stalling the wing on the ground (a fault of the de Havilland Comet 1). Boeing
responded by adding
These modifications except
to the fin under the tail became standard on all 707 variants
and were retrofitted to all
earlier 707s. The 37 -420s were delivered to BOAC, Lufthansa, Air-India, El Al,
and Varig through November 1963; Lufthansa was the first to carry passengers,
in March 1960.
* BOEING 707-320B/420 REFERENCE INFORMATION
*
*****Total Flight Simulator aircraft weight
with full fuel*****
NOTE: To
adjust fuel load, on the Aircraft menu, click Fuel.
**********SPEEDS**********
Vmo -
Maximum Operating Speed (airspeed)
370 KIAS
Mmo -
Maximum Operating Speed (Mach)
.90 Mach
Turbulent
Air Penetration Speed
280 KIAS/.73 Mach
Vlo - Maximum
Gear Operating Speed
270 KIAS
Vle -
Maximum Landing Gear Extension Speed
320 KIAS/.83 Mach
*****Maximum Flap Placard Speeds*****
Maximum
Flap (Placard) KIAS Speeds
5 230
14 223
25 215
40 200
50 185
*****Take-off*****
V1 -
Takeoff Decision Speed (dry runway, flaps 14)
Standard temperature, sea level pressure
altitude
154 KIAS (
145 KIAS (
136 KIAS (
Standard temperature, 5,000' pressure
altitude
151 KIAS (
143 KIAS (
Vr -
Rotation Speed (dry runway, flaps 14)
Standard temperature, sea level pressure
altitude
160 KIAS (
152 KIAS (
143 KIAS (
Standard temperature, 5,000' pressure
altitude
158 KIAS (
147 KIAS (
V2 -
Takeoff Safety Speed (dry runway, flaps 14)
177 KIAS (
171 KIAS (
163 KIAS (
*****Landing*****
Vref -
Landing Approach Speed (flaps 50, gear down)
158 KIAS (
151 KIAS (
147 KIAS (
142 KIAS (
NOTE: For explanations of speeds used on this tab,
see "V-speeds" in the Glossary section of Help.