Knowledge (XXG)

Schweizer SGS 1-34

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During the protracted development process, Schweizer Aircraft was aware that the 1-34 would be overtaken by the changes in class rules and also by the performance of the newer European fiberglass sailplanes, but continued development of the SGS 1-34 anyway. The company identified that there was
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By the time the 1-34 was introduced it was no longer competitive in the Standard Class, but has proven very successful as a club aircraft, being a great "step-up" sailplane for post-solo students and accomplished pilots.
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in a vertical dive to the maximum safe speed as specified in the original Standard Class rules. Developing and testing these proved expensive and time-consuming and this also extended the aircraft's development time.
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dive brakes, fixed landing gear and no water ballast. By the time the 1-34 had flown in 1969 the Standard Class rules had changed to allow essentially unrestricted sailplanes with a 15-metre (49.2 feet) wingspan.
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The 1-34 was designed over several years to spread out the development costs. At the time the design work on the aircraft was started the Standard Class was new and described a very simple aircraft with
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The one company concession to the changing Standard Class rules was the development of a retractable landing gear version of the 1-34, designated as the SGS 1-34R.
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and 230 lb (104 kg) of water ballast. The new tail allowed 18 lb (8 kg) of lead nose ballast to be removed. The aircraft flew three
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demand from private owners and especially clubs and commercial operations for a simple, rugged single seat glider with greater performance than the
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and ballast tanks mounted in the wings that hold 230 lbs (105 kg) of water. The aircraft was subsequently registered in the
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The 1-34 also features in-flight adjustable rudder pedals and a two-way adjustable seat to accommodate pilots of different heights.
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construction. All surfaces are aluminum covered, with the exception of the rudder which is covered in aircraft fabric.
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After a hangar collapsed on Bob Park's 1-34R and destroyed the aft part of the aircraft he rebuilt it in the
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The original fixed landing gear 1-34 model was certified under type certificate G3EA on 16 October 1969.
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In May 2008 there were still 63 1-34s and six 1-34Rs registered in the USA and 5 SGS 1-34s in Canada.
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At least two 1-34s have been highly modified. Bob Park's 1-34R, registered N17974, was damaged when a
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The 1-34 was the first Schweizer design to depart from using a NACA airfoil. The 1-34 has no wing
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Schweizer SGS 1-34 showing wing planform. The tire is used to secure the wing in windy conditions
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In service the 1-34 has proven to be a popular club aircraft and ideal for the completion of
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The 1-34 was designed over a number of years in the mid-1960s and first flew in 1969.
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The 1-34 was flown in Standard Class competitions, but was out-performed by the new
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The retractable gear 1-34R was added to type certificate G3EA on 15 June 1971.
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A modified SGS 1-34 airframe with tricycle landing gear and powered by a
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prototype, an entry in the early 1970s USAF Compass Dwell endurance
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The 1-34 type certificate is currently held by K & L Soaring of
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and resulted in a hangar collapse. The 1-34R was rebuilt with a
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Wings Like Eagles, The Story of Soaring in the United States
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Schweizer SGS 1-34, front view showing air vent intake with
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piston engine was used as the basis for the pilotless
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Aircraft of comparable role, configuration, and era
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Smithsonian Institution Press, 1988. 437:Root: Wortmann FX 61-163, Tip: Wortmann FX 61-126 204:The 1-34 has air brakes capable of limiting the 843:SGS 1-34 Flight, Erection and Inspection Manual 554: 552: 815:"Sailplanes, Hang Gliders & Motor Gliders" 538: 536: 534: 532: 530: 528: 1225: 863: 8: 592: 590: 588: 586: 584: 582: 1266: 1232: 1218: 1210: 870: 856: 848: 690:1983 Sailplane Directory, Soaring Magazine 544:1983 Sailplane Directory, Soaring Magazine 464:142 mph (227 km/h, 123 kn) 161:, single-seat, high-wing glider built by 1251:glider aircraft designations 1924–1962, 700: 698: 524: 664: 617: 615: 613: 20: 710:"Make / Model Inquiry Results N17974" 7: 146:Schweizer SGS 1-34 being towed by a 407:49 ft 3 in (15.00 m) 785:"Canadian Civil Aircraft Register" 401:25 ft 5 in (7.80 m) 38:SGS 1-34 with air brakes deployed 16:Glider built by Schweizer Aircraft 14: 419:151 sq ft (14.0 m) 413:7 ft 6 in (2.31 m) 243:GlasflĂĽgel H-201 Standard Libelle 349:Experimental – Racing/Exhibition 319:designation for the SGS 1-34 is 29: 756:Federal Aviation Administration 706:Federal Aviation Administration 623:Federal Aviation Administration 476:144 ft/min (0.73 m/s) 70:Schweizer Aircraft Corporation 1822:1960s United States sailplanes 492:N.V. Vliegtuigbouw 013 Sagitta 241:European gliders, such as the 138:Schweizer SGS 1-34 on take-off 1: 193:The SGS 1-34 is of all metal 1842:Aircraft first flown in 1969 627:"GLIDER DATA SHEET NO. G3EA" 157:is a United States Standard 811:US Southwest Soaring Museum 374:US Southwest Soaring Museum 1858: 650:K & L Soaring (n.d.). 1802: 1255:designations 1962–present 449:840 lb (381 kg) 443:570 lb (259 kg) 303:Martin Marietta Model 845 220:FX 61-163 airfoil at the 107:Martin Marietta Model 845 37: 28: 23: 1650:1948 USAF redesignations 1199:William (Bill) Schweizer 886:Sailplanes & Gliders 652:"K & L Soaring, LLC" 1140:Reconnaissance Aircraft 731:Designation-Systems.Net 559:Activate Media (2006). 386:General characteristics 363:flights in August 1983. 148:Champion 7GCAA Citabria 735:"Martin Marietta 845A" 470:33 at 55 mph (88 km/h) 180:Design and development 150: 139: 131: 119: 1261:USAAC/USAAF sequences 1072:Agricultural Aircraft 145: 137: 125: 117: 1706:Tri-Service sequence 671:: CS1 maint: year ( 561:"SGS 1-34 Schweizer" 468:Maximum glide ratio: 1093:Amphibious Aircraft 596:Schweizer, Paul A: 368:Aircraft on display 344:Park 1-34R Modified 292:Racing – Exhibition 271:Operational history 216:and instead uses a 1837:High-wing aircraft 1827:Schweizer aircraft 879:Schweizer Aircraft 625:(September 2007). 163:Schweizer Aircraft 155:Schweizer SGS 1-34 151: 140: 132: 120: 1809: 1808: 1645: 1644: 1207: 1206: 1157:RU-38 Twin Condor 206:terminal velocity 187:terminal velocity 112: 111: 1849: 1776: 1267: 1234: 1227: 1220: 1211: 1194:Paul A Schweizer 1189:Ernest Schweizer 872: 865: 858: 849: 826: 825: 823: 821: 807: 801: 800: 798: 796: 787:. 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Archived from 556: 547: 540: 457: 388: 351:category with a 299:Lycoming TIO-360 265:Cayuta, New York 167:Elmira, New York 95: 79:Ernest Schweizer 59: 51:Type of aircraft 33: 21: 1857: 1856: 1852: 1851: 1850: 1848: 1847: 1846: 1832:Glider aircraft 1812: 1811: 1810: 1805: 1798: 1774: 1707: 1701: 1641: 1470:Training glider 1465: 1439: 1423: 1312: 1286: 1262: 1256: 1238: 1208: 1203: 1177: 1173:MQ-8 Fire Scout 1161: 1135: 1104: 1088: 1067: 881: 876: 834: 829: 819: 817: 809: 808: 804: 794: 792: 779: 778: 774: 764: 762: 754: 753: 749: 739: 737: 729: 728: 724: 714: 712: 704: 703: 696: 687: 680: 663: 656: 654: 649: 648: 644: 634: 632: 629: 621: 620: 611: 595: 580: 570: 568: 567:on May 27, 2008 558: 557: 550: 541: 526: 522: 514:List of gliders 483: 453: 384: 382: 370: 329: 279:passed through 273: 182: 93: 58:National origin 57: 52: 17: 12: 11: 5: 1855: 1853: 1845: 1844: 1839: 1834: 1829: 1824: 1814: 1813: 1807: 1806: 1803: 1800: 1799: 1797: 1796: 1791: 1782: 1777: 1772: 1767: 1762: 1757: 1752: 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Index


Standard-class
Ernest Schweizer
Martin Marietta Model 845


pitot tube


Champion 7GCAA Citabria
Class
Schweizer Aircraft
Elmira, New York
terminal velocity
aluminum
monocoque
terminal velocity
washout
Wortmann
wing root
wing tip
fiberglass
GlasflĂĽgel H-201 Standard Libelle
1-26
badge flights
Cayuta, New York
hurricane
Georgia
V-tail
experimental

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