185:
38:
192:
Electrical-mechanical air data computers were developed in the early 1950s to provide a central source of airspeed, altitude, and other signals to avionic systems that needed this data. A central air data computer avoided duplication of sensing equipment and could be more sophisticated and accurate.
143:
and may control heating of the pitot tube and static vent to prevent blockage due to ice. As on simpler aircraft, there is usually not a fly-by-wire system, the outputs are typically to the cockpit altimeters or display system, flight data recorder and autopilot system. Output interfaces typically
134:
In simpler aircraft and helicopters the Air Data
Computers, generally two in number, and smaller, lighter and simpler than an ADIRU, may be called Air Data Units, although their internal computational power is still significant. They commonly have the pitot and static pressure inputs, as well as
172:
fitted internally. These devices are usually autonomous and do not require pilot input, merely sending continuously updated data to the recipient systems while the aircraft is powered up. Some, like the
Enhanced Software Configurable Air Data Unit (ESCADU) are software configurable to suit many
130:
the concept has been refined further by splitting air data acquisition and measuring – performed by combined pitot/static "air data smart probes" with integrated sensors – and computation of parameters performed by "air data applications" (ADA) executed on non-dedicated processing units. As all
131:
information from the sensors is transmitted electrically, routing of pitot and static pressure lines through the aircraft and associated maintenance tasks can be avoided.
284:
658:
407:
208:
The late 1960s saw the introduction of digital air data computers. In 1967, Garrett AiResearch's ILAAS air data computer was the first all-digital unit. The
1235:
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aircraft the air data computer is combined with attitude, heading and navigation sources in a single unit known as the
205:
developed early central air data computer systems that integrated pneumatic, electrical, and electronic components.
1270:
1225:
916:
483:
411:
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1456:
1300:
1250:
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Apart from commercial ADCs implementation, there are available do-it-yourself, and open-source implementations.
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30:
This article is about air data computers in general. For the specific CADC used in the F-14, see
571:
1609:
1523:
1260:
1205:
1115:
1110:
1095:
783:
332:
613:"Standard Central Air Data Computer [SCADC, 1987] :: Rochester Avionic Archives"
235:
Rochester developed
Standard Central Air Data Computer (SCADC). Aircraft fitted included the
201:
started producing a central air data computer in 1956 for use on US Air Force jet fighters.
1578:
1461:
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1030:
753:
728:
671:
268:
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37:
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1255:
1050:
698:
353:
1573:
1433:
1150:
708:
703:
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572:"New Avionics Standardization Initiative - Standard Central Air Data Computer (SCADC)"
1603:
1502:
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1180:
818:
798:
713:
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105:
90:
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961:
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763:
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693:
240:
232:
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The Bendix
Central Air Data Computer contains complex electromechanical mechanisms.
149:
636:
17:
1486:
1369:
1085:
941:
280:
260:
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164:(OAT), but with no involvement in aircraft attitude or heading, as there are no
66:
1476:
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1359:
1315:
1310:
1145:
1080:
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1011:
986:
971:
906:
768:
758:
264:
1533:
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1379:
1354:
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1200:
981:
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901:
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843:
828:
823:
813:
748:
718:
301:
217:
165:
153:
145:
31:
331:. Science Information Resource Center, Hemisphere Publishing. p. 63.
73:
component found in modern aircraft. This computer, rather than individual
1446:
1419:
1394:
1160:
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1001:
931:
848:
773:
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679:
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70:
62:
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871:
853:
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156:(Firewire). The data provided may be true airspeed, pressure altitude,
193:
The first air data computer was built by
Kollsman Instruments for the
956:
926:
833:
808:
738:
112:
1349:
951:
803:
209:
183:
36:
224:
213:
640:
627:"ISD Queen's Award Ceremony :: Rochester Avionic Archives"
228:
397:
Embraer 195 Airplane
Operations Manual, Volume 2, chapter 14
212:
used
Honeywell's digital air data system in 1969 and the
104:. This enables computation of static air temperature and
69:
from pressure and temperature inputs. It is an essential
121:
Global
Navigation Air Data Inertial Reference System
1516:
1495:
1428:
1324:
1159:
1025:
862:
678:
491:. Washington, DC: The Lincoln Press. p. 171.
100:Air data computers usually also have an input of
89:. In some very high-speed aircraft such as the
582:(1). Wright-Patterson Air Force Base: 3. 1979.
97:is calculated instead of calibrated airspeed.
652:
547:"DC-10's air data system casts a long shadow"
8:
325:United States Joint Chiefs of Staff (1988).
285:Queen's Award for Technological Achievement
119:(ADIRU) which has now been replaced by the
659:
645:
637:
231:aircraft fleets were retrofitted with the
432:Asgard: the Open Source Air Data Computer
328:The official dictionary of military terms
317:
482:Hamlin, Fred; Miller, Eleanor (1957).
450:"Single Computer Combines Flight Data"
297:Acronyms and abbreviations in avionics
283:, for which the company received the
7:
595:Standard Central Air Data Computer
25:
173:different aircraft applications.
65:, vertical speed, air speed, and
545:Corey, Frederick (17 Mar 1969).
467:"From the first to the latest".
223:From the late 1980s much of the
117:Air Data Inertial Reference Unit
485:The Aircraft Year Book for 1956
375:"What Is an Air Data Computer?"
141:platinum resistance thermometer
1569:In-flight entertainment system
1266:Horizontal situation indicator
302:F-14 Central Air Data Computer
1:
448:Klass, Philip (28 Sep 1953).
352:Kim Wiolland (January 2015).
81:, Mach number, altitude, and
1549:Environmental control system
218:LSI-based air data computer
1636:
1226:Course deviation indicator
917:Electro-hydraulic actuator
503:"Air Data Computer System"
29:
1457:Conventional landing gear
55:central air data computer
1241:Flight management system
85:data from an aircraft's
1544:Emergency oxygen system
1306:Turn and slip indicator
1101:Leading-edge droop flap
1071:Drag-reducing aerospike
1046:Adaptive compliant wing
1041:Active Aeroelastic Wing
162:Outside Air Temperature
137:outside air temperature
1584:Passenger service unit
1385:Self-sealing fuel tank
1281:Multi-function display
534:(21): 42. 16 Oct 1967.
189:
42:
1564:Ice protection system
1482:Tricycle landing gear
1472:Landing gear extender
689:Aft pressure bulkhead
601:. GEC Avionics. 1985.
187:
102:total air temperature
40:
1615:Aircraft instruments
1529:Auxiliary power unit
937:Flight control modes
521:"Fly by the numbers"
438:, Tom Nardi, 2018-01
128:Embraer E-Jet family
77:, can determine the
1508:Escape crew capsule
1415:War emergency power
1286:Pitot–static system
1131:Variable-sweep wing
839:Vertical stabilizer
354:"Air Data Computer"
95:equivalent airspeed
87:pitot-static system
79:calibrated airspeed
1216:Attitude indicator
1196:Airspeed indicator
1191:Aircraft periscope
469:Air Force Magazine
273:C-135 Stratolifter
203:Garrett AiResearch
190:
43:
27:Avionics component
18:Air data computers
1597:
1596:
1524:Aircraft lavatory
1261:Heading indicator
1206:Annunciator panel
1186:Air data computer
1096:Leading-edge cuff
47:air data computer
41:Air data computer
16:(Redirected from
1627:
1579:Navigation light
1559:Hydraulic system
1534:Bleed air system
1462:Drogue parachute
1136:Vortex generator
754:Interplane strut
661:
654:
647:
638:
631:
630:
623:
617:
616:
609:
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602:
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590:
584:
583:
568:
562:
561:
551:
542:
536:
535:
525:
517:
511:
510:
509:: 5. 2 May 1955.
499:
493:
492:
490:
479:
473:
472:
471:(Nov 1985): 115.
464:
458:
457:
445:
439:
429:
423:
422:
420:
419:
410:. Archived from
404:
398:
395:
389:
388:
386:
385:
371:
365:
364:
358:
349:
343:
342:
322:
269:C-141 Starlifter
158:density altitude
21:
1635:
1634:
1630:
1629:
1628:
1626:
1625:
1624:
1600:
1599:
1598:
1593:
1589:Ram air turbine
1554:Flight recorder
1512:
1491:
1424:
1405:Thrust reversal
1329:
1320:
1291:Radar altimeter
1256:Head-up display
1166:
1155:
1051:Anti-shock body
1033:
1021:
882:Artificial feel
864:Flight controls
858:
724:Fabric covering
674:
670:components and
665:
635:
634:
625:
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368:
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339:
324:
323:
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314:
293:
182:
126:On the Embraer
35:
28:
23:
22:
15:
12:
11:
5:
1633:
1631:
1623:
1622:
1617:
1612:
1602:
1601:
1595:
1594:
1592:
1591:
1586:
1581:
1576:
1574:Landing lights
1571:
1566:
1561:
1556:
1551:
1546:
1541:
1536:
1531:
1526:
1520:
1518:
1514:
1513:
1511:
1510:
1505:
1499:
1497:
1496:Escape systems
1493:
1492:
1490:
1489:
1484:
1479:
1474:
1469:
1464:
1459:
1454:
1449:
1444:
1438:
1436:
1434:arresting gear
1426:
1425:
1423:
1422:
1417:
1412:
1407:
1402:
1397:
1392:
1390:Splitter plate
1387:
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1377:
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1362:
1357:
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1123:
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776:
771:
766:
761:
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751:
746:
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736:
731:
726:
721:
716:
711:
709:Cruciform tail
706:
704:Crack arrestor
701:
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691:
685:
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664:
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656:
649:
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459:
440:
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366:
344:
337:
316:
315:
313:
310:
309:
308:
304:, used on the
299:
292:
289:
257:F-111 Aardvark
181:
178:
170:accelerometers
83:altitude trend
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
1632:
1621:
1620:Glass cockpit
1618:
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1613:
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1608:
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1590:
1587:
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1542:
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1537:
1535:
1532:
1530:
1527:
1525:
1522:
1521:
1519:
1517:Other systems
1515:
1509:
1506:
1504:
1503:Ejection seat
1501:
1500:
1498:
1494:
1488:
1485:
1483:
1480:
1478:
1475:
1473:
1470:
1468:
1465:
1463:
1460:
1458:
1455:
1453:
1450:
1448:
1447:Arrestor hook
1445:
1443:
1442:Aircraft tire
1440:
1439:
1437:
1435:
1431:
1427:
1421:
1418:
1416:
1413:
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1274:
1272:
1269:
1267:
1264:
1262:
1259:
1257:
1254:
1252:
1249:
1247:
1246:Glass cockpit
1244:
1242:
1239:
1237:
1234:
1232:
1229:
1227:
1224:
1222:
1219:
1217:
1214:
1212:
1209:
1207:
1204:
1202:
1199:
1197:
1194:
1192:
1189:
1187:
1184:
1182:
1181:Air data boom
1179:
1177:
1174:
1173:
1171:
1168:
1162:
1158:
1152:
1149:
1147:
1144:
1142:
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1107:
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1102:
1099:
1097:
1094:
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1089:
1087:
1084:
1082:
1079:
1077:
1074:
1072:
1069:
1067:
1064:
1062:
1059:
1057:
1054:
1052:
1049:
1047:
1044:
1042:
1039:
1038:
1036:
1032:
1028:
1024:
1018:
1015:
1013:
1010:
1008:
1005:
1003:
1000:
998:
995:
993:
990:
988:
985:
983:
980:
978:
975:
973:
970:
968:
965:
963:
962:Rudder pedals
960:
958:
955:
953:
950:
948:
945:
943:
940:
938:
935:
933:
930:
928:
925:
923:
920:
918:
915:
913:
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908:
905:
903:
900:
898:
895:
893:
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883:
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878:
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873:
870:
869:
867:
865:
861:
855:
852:
850:
847:
845:
842:
840:
837:
835:
832:
830:
827:
825:
822:
820:
819:Trailing edge
817:
815:
812:
810:
807:
805:
802:
800:
799:Stressed skin
797:
795:
792:
790:
787:
785:
782:
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777:
775:
772:
770:
767:
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762:
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742:
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712:
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643:
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622:
619:
614:
608:
605:
597:
596:
589:
586:
581:
577:
573:
567:
564:
560:(6): 125–130.
559:
555:
548:
541:
538:
533:
529:
522:
516:
513:
508:
507:Aviation Week
504:
498:
495:
487:
486:
478:
475:
470:
463:
460:
455:
454:Aviation Week
451:
444:
441:
437:
433:
428:
425:
414:on 2018-10-11
413:
409:
403:
400:
394:
391:
380:
376:
370:
367:
362:
361:Avionics News
355:
348:
345:
340:
338:0-89116-792-7
334:
330:
329:
321:
318:
311:
307:
303:
300:
298:
295:
294:
290:
288:
286:
282:
278:
277:C-2 Greyhound
274:
270:
266:
262:
258:
254:
253:EA-6B Prowler
250:
249:C-5A/B Galaxy
246:
242:
238:
234:
230:
226:
221:
219:
215:
211:
206:
204:
200:
196:
186:
179:
177:
174:
171:
167:
163:
159:
155:
151:
147:
142:
138:
132:
129:
124:
122:
118:
114:
109:
107:
106:true airspeed
103:
98:
96:
92:
91:Space Shuttle
88:
84:
80:
76:
72:
68:
64:
60:
56:
52:
48:
39:
33:
19:
1539:Deicing boot
1467:Landing gear
1410:Townend ring
1400:Thrust lever
1375:NACA cowling
1340:Autothrottle
1332:fuel systems
1330:devices and
1185:
1121:Stall strips
1091:Krueger flap
1061:Channel wing
1007:Wing warping
997:Stick shaker
992:Stick pusher
912:Dual control
897:Centre stick
764:Leading edge
734:Flying wires
694:Cabane strut
621:
607:
594:
588:
579:
575:
566:
557:
553:
540:
531:
527:
515:
506:
497:
484:
477:
468:
462:
453:
443:
427:
416:. Retrieved
412:the original
402:
393:
382:. Retrieved
379:Wisegeek.com
378:
369:
360:
347:
327:
320:
241:A-6 Intruder
233:GEC Avionics
222:
207:
191:
175:
133:
125:
110:
99:
58:
54:
50:
46:
44:
1487:Tundra tire
1370:Intake ramp
1301:Transponder
1086:Gurney flap
1027:Aerodynamic
942:Fly-by-wire
824:Triple tail
554:Electronics
528:Electronics
281:E-2 Hawkeye
261:F-4 Phantom
245:A-7 Corsair
237:A-4 Skyhawk
195:B-52 bomber
123:(GNADIRS).
75:instruments
67:Mach number
61:) computes
1604:Categories
1477:Oleo strut
1365:Inlet cone
1360:Gascolator
1326:Propulsion
1316:Yaw string
1311:Variometer
1167:instrument
1146:Wing fence
1081:Gouge flap
1056:Blown flap
1012:Yaw damper
987:Stabilator
972:Side-stick
907:Dive brake
794:Stabilizer
769:Lift strut
759:Jury strut
418:2019-02-02
384:2015-06-25
312:References
265:S-3 Viking
166:gyroscopes
1452:Autobrake
1380:NACA duct
1355:Fuel tank
1345:Drop tank
1328:controls,
1211:Astrodome
1201:Altimeter
1066:Dog-tooth
1031:high-lift
982:Spoileron
967:Servo tab
947:Gust lock
902:Deceleron
887:Autopilot
844:Wing root
829:Twin tail
814:Tailplane
749:Hardpoint
719:Empennage
682:structure
220:in 1970.
154:IEEE 1394
146:ARINC 429
32:F-14 CADC
1610:Avionics
1420:Wet wing
1395:Throttle
1141:Vortilon
1002:Trim tab
932:Flaperon
922:Elevator
877:Airbrake
849:Wing tip
774:Longeron
744:Fuselage
680:Airframe
668:Aircraft
576:Feedback
456:: 45–48.
436:HACKADAY
408:"ESCADU"
291:See also
216:used an
152:or even
71:avionics
63:altitude
1430:Landing
1221:Compass
1169:systems
1161:Avionic
1151:Winglet
1034:devices
977:Spoiler
872:Aileron
854:Wingbox
779:Nacelle
729:Fairing
672:systems
180:History
150:Gillham
139:from a
1165:flight
1126:Strake
957:Rudder
927:Elevon
892:Canard
834:V-tail
809:T-tail
739:Former
699:Canopy
335:
279:, and
199:Bendix
113:Airbus
1350:FADEC
1236:EICAS
1111:Slats
952:HOTAS
804:Strut
599:(PDF)
550:(PDF)
524:(PDF)
489:(PDF)
357:(PDF)
210:DC-10
53:) or
1432:and
1296:TCAS
1276:ISIS
1231:EFIS
1176:ACAS
1163:and
1116:Slot
1076:Flap
1029:and
1017:Yoke
789:Spar
714:Dope
333:ISBN
306:F-14
227:and
225:USAF
214:F-14
160:and
144:are
59:CADC
1271:INS
1251:GPS
1106:LEX
784:Rib
229:USN
168:or
111:In
51:ADC
45:An
1606::
580:II
578:.
574:.
558:42
556:.
552:.
532:40
530:.
526:.
505:.
452:.
434:,
377:.
359:.
287:.
275:,
271:,
267:,
263:,
259:,
255:,
251:,
247:,
243:,
239:,
197:.
148:,
108:.
93:,
660:e
653:t
646:v
629:.
615:.
421:.
387:.
363:.
341:.
57:(
49:(
34:.
20:)
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