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b_707.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Boeing 707</title>
<script type="module" src="https://unpkg.com/@google/model-viewer/dist/model-viewer.min.js"></script>
<script nomodule src="https://unpkg.com/@google/model-viewer/dist/model-viewer-legacy.js"></script>
<link rel="stylesheet" href="b_707.css">
</head>
<body>
<div id="aSide">
<model-viewer src="boeing_707/scene.gltf" alt="Boeing 707" auto-rotate camera-controls ar"></model-viewer>
</div>
<dl>
<div class="modal__title"><dt><h1>Narrow Body Aircraft</h1></dt></div>
<div class="modal__text">
A narrow-body aircraft or single-aisle aircraft is an airliner arranged
along a single aisle, permitting up to 6-abreast seating in a cabin less
than 4 metres (13 ft) in width. The highest seating capacity of a
narrow-body aircraft is 295 passengers in the Boeing 757–300.
</div>
<div class="modal__subtitle"><dt><h2>Boeing 707</h2></dt></div>
<div class="modal__image">
<img src="boeing 707.jpg">
</div>
<div class="modal__text">
<p><dd>
Range: 7,400 km<br>
Introduced: March 1977 <br>
Length: 47 m <br>
Wingspan: 44 m <br>
Weight: 83,920 kg <br>
Unit cost: 270,000,000–270,000,000 USD (1998) <br>
Engine types: Pratt & Whitney JT3D, CFM International CFM56. <br>
</dd></p>
</div>
<div class="modal__subhead">
<dt>Engine</dt>
</div>
<div class="modal__text">
<p><dd>
USAF and NATO E-3s have an unrefueled range of 7,400 km (4,600 mi) or 8 hours of flying. The newer E-3 versions bought by France, Saudi Arabia, and the UK are equipped with newer CFM56-2 turbofan engines, and these can fly for about 11 hours or more than 9,250 km (5,750 mi).
Developed from: Boeing 707
Manufacturer: Boeing Defense, Space & Security
First flight: EC-137D: 9 February 1972; E-3: 25 May 1976
Role: Airborne early warning and control (AEW&C)
</p></dd>
</div>
<div class="modal__subhead">
<dt>Design</dt>
</div>
<div class="modal__text">
<p><dd>- The E-3 Sentry's airframe is a modified Boeing 707-320B Advanced model.</dd> <dd>- Modifications include a rotating radar dome (rotodome), uprated hydraulics from 241 to 345 bar (3500–5000 PSI) to drive the rotodome,
single-point ground refueling, air refueling, and a bail-out tunnel or chute.</dd><dd>- A second bail-out chute was deleted to cut mounting costs.</dd>
</p>
</div>
<div class="modal__subhead">
<dt>Development</dt>
</div>
<div class="modal__text">
<p><dd> In 1963, the USAF asked for proposals for an Airborne Warning and Control System (AWACS) to replace its EC-121 Warning Stars, which had served in the airborne early warning role for over a decade. </dd>
<dd> The new aircraft would take advantage of improvements in radar technology and computer-aided radar data analysis and data reduction. These developments allowed airborne radars to "look down". </dd>
<dd> to detect the movement of low-flying aircraft, and discriminate, even over land, target aircraft's movements; previously this had been impossible due to the inability to discriminate an aircraft's track from ground clutter.</dd>
<dd> Contracts were issued to Boeing, Douglas, and Lockheed, the latter being eliminated in July 1966. In 1967, a parallel program was put into place to develop the radar, with Westinghouse Electric Corporation and Hughes Aircraft being asked to compete in producing the radar system.</dd><dd>- In 1968, it was referred to as Overland Radar Technology (ORT) during development tests on the modified EC-121Q. </dd>
<dd> Approval was given on 26 January 1973 for the full-scale development of the AWACS system. To allow further development of the aircraft's systems, orders were placed for three preproduction aircraft, the first of which performed its maiden flight in February 1975. IBM and Hazeltine were selected to develop the mission computer and display system. The IBM computer was designated 4PI, and the software was written in JOVIAL.</dd><dd>- A Semi-Automatic Ground Environment (SAGE) or back-up interceptor control (BUIC) operator would immediately be at home with the track displays and tabular displays, but differences in symbology would create compatibility problems in tactical ground radar systems in Iceland, mainland Europe, and South Korea over Link-11 (TADIL-A). In 1977, Iran placed an order for ten E-3s, however this order was cancelled following the Iranian Revolution.</dd>
</p>
</div>
<div class="modal__subhead">
<dt>Future Status</dt>
</div>
<div class="modal__text">
<p><dd> Because the Boeing 707 is no longer in production, the E-3 mission package has been fitted into the Boeing E-767 for the Japan Air Self Defense Forces. </dd><dd>- The E-10 MC2A was intended to replace USAF E-3s—along with the RC-135 and the E-8 Joint STARS, <br> but the program was canceled by the Department of Defense.</p>
</div>
<div class="modal__subhead">
<dt>Specifications</dt>
</div>
<div class="modal__text">
<p><dd>Crew: Flight crew: 4 (aircraft commander, pilot, navigator, flight engineer)
Mission crew: 13–19 <br>
Length: 152 ft 11 in (46.61 m) <br>
Wingspan: 145 ft 9 in (44.42 m) <br>
Height: 41 ft 4 in (12.60 m) <br>
Wing area: 3,050 sq ft (283 m2) <br>
Empty weight: 185,000 lb (83,915 kg) <br>
Gross weight: 344,000 lb (156,036 kg) <br>
Max takeoff weight: 347,000 lb (157,397 kg) <br>
Powerplant: 4 × Pratt and Whitney TF33-PW-100A turbofan, 21,500 lbf (96 kN) thrust each <br>
</dd></p>
</div>
<div class="modal__subhead">
<dt>Performance</dt>
</div>
<div class="modal__text">
<p><dd>Maximum speed: 461 kn (531 mph, 854 km/h) <br>
Cruise speed: 310 kn (360 mph, 580 km/h) optimum <br>
Range: 4,000 nmi (4,600 mi, 7,400 km) <br>
Endurance: more than 8 hours without refuelling <br>
Service ceiling: 29,000 ft (8,800 m) minimum <br>
</div>
<div class="modal__subhead">
<dt>Avionics</dt>
</div>
<div class="modal__text">
<p><dd>AN/APS-133 colour weather radar
Westinghouse Corporation AN/APY-1 or AN/APY-2 passive electronically scanned array radar system<br><br></dd></dl>
</p>
</div>
</div>
</div>
</body>
</html>