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Yakovlev Yak-18T

The Yakovlev Yak-18T (Russian: Яковлев Як-18T) is a four- or five-seat fully aerobatic utility aircraft developed by Yakovlev. Introduced to train Aeroflot pilots, it has gained some popularity as a sportplane both inside and outside the former USSR. It is powered by a 268-298 kW (360-400 hp) Vedeneyev M14P radial engine, and is designed for stresses of +6.48/-3.24 g.

Yak-18T
Yak-18T (1999 example)
Role Training aircraft
Designer Yakovlev
First flight 1967
Introduction 1967
Primary users Aeroflot
Soviet Air Force
Number built 750+
Variants Technoavia SM-94
Yak-18T

Design and development edit

All the Yak-18 and Yak-18T have in common is the model number. The Yak-18T is a unique design, despite its nomenclature.

The 18T was designed in the late 60's, as a civilian aircraft. The aircraft has a nosewheel, is a four- or five-seater, and has a nine-cylinder 360 hp radial. The Yak-18T shares systems with the Yak-50/52 family. These aircraft all have the 265 kW (355 hp) Vedeneyev M14 nine-cylinder radial engine as well as the same underlying compressed-air system for engine starting, brakes, undercarriage and flaps. The propeller, avionics and other parts are also shared. The Yak-18T, like all Russian aircraft used for training, is aerobatic.

Compared with other four-seat light aircraft such as the Cessna 172 or the Piper PA-28, the Yak-18T is only a little wider and longer but it is much heavier and is equipped with a considerably more powerful engine. The Yak-18T is perhaps better compared with the Piper Saratoga which has two extra seats but which has a similar maximum weight, together with a retractable undercarriage and a similarly powerful engine. The Yak-18T is, however, distinguished by its strong construction, aerobatic capability and docile yet responsive handling characteristics.

The Yak-18T prototype had its first flight in mid-1967 and subsequently the type was placed in series production in Smolensk.

Operational history edit

The Yak-18T went on to become the standard basic trainer with Aeroflot flight schools, while small numbers also entered service with the Soviet Air Force as liaison and communications aircraft. After approximately 700 were built, many for Aeroflot, production ceased in the late 1980s, to be resumed in 1993.[1] In 2011 it was claimed that the type remained in small-scale production by the Yakolev Design Bureau,[2] although apparently none had been produced in more than a decade.

Technoavia has marketed the SM-94, its own development of the Yak-18T, featuring curved windshield, larger fuel tanks and choice of avionics package, but production is dependent on orders being placed.[1]

Operators edit

  Cuba
  Moldova
  Lithuania
  Soviet Union
  Transnistria

Specifications (Yak-18T) edit

Data from EASA - Yak-18T[3]

General characteristics

  • Crew: 1 or 2
  • Capacity: up to 4 subject to CoG limitations
  • Length: 8.354 m (27 ft 5 in) [4]
  • Wingspan: 11.16 m (36 ft 7 in) [4]
  • Height: 3.4 m (11 ft 2 in) [4]
  • Wing area: 18.892 m2 (203.35 sq ft) [5]
  • Airfoil: root: Clark YH (14.5%) ; tip: Clark YH (9.3%)[6]
  • Empty weight: 1,217 kg (2,683 lb)
  • Max takeoff weight: 1,650 kg (3,638 lb)
1,510 kg (3,329 lb) for aerobatics
  • Fuel capacity: standard 183 L (48 US gal; 40 imp gal) in two wing tanks, (including a 3 L (0.79 US gal; 0.66 imp gal) collector tank)
or 363 L (96 US gal; 80 imp gal) in two wing tanks + collector
or 353 L (93 US gal; 78 imp gal) in four wing tanks (2x 90l + 2x 85l) + collector
'Oil 20 L (5.3 US gal; 4.4 imp gal)
  • Powerplant: 1 × Vedeneyev M14P 9-cylinder air-cooled radial piston engine, 268 kW (359 hp)
or 1x 300 kW (400 hp) Vedeneyev M14PF
  • Propellers: 2-bladed V-530TA-D35 constant-speed propeller (or MTV3-bladed propellers)

Performance

  • Maximum speed: 262 km/h (163 mph, 141 kn) [citation needed]
  • Cruise speed: 180–210 km/h (110–130 mph, 97–113 kn) [7]
  • Stall speed: 114 km/h (71 mph, 62 kn) idle, gear down, flaps down[citation needed]
  • Never exceed speed: 300 km/h (190 mph, 160 kn)
  • Range: 740 km (460 mi, 400 nmi) [citation needed]
  • Service ceiling: 4,000 m (13,000 ft) (no Oxygen system)
  • g limits: +6.4 -3.2 at 1,510 kg (3,329 lb)
+5 -2.5 at 1,650 kg (3,638 lb)
  • Rate of climb: 5 m/s (980 ft/min) [citation needed]
  • Take-off run: 200 m (656 ft)[7]
  • Landing run: 250 m (820 ft)[7]
  • Aircraft life:
  • 3,500 flight hours,
  • 15,000 landings,
  • no calendar life limit is established

Avionics
standard factory fit:-

  • Baklan 5 VHF
  • ARK-9 ADF
  • IMK-IAZ gyro magnetic compass system.
  • AGD-1K gyro horizon
  • ZUE-53U turn indicator
  • PP-5 radio altimeter

References edit

  1. ^ a b "Yakovlev Yak-18T". Airliners.net. 2009. Retrieved 22 December 2012.
  2. ^ Bayerl, Robby; Berkemeier, Martin; et al. (2011). World Directory of Leisure Aviation 2011–12. Lancaster: WDLA UK. p. 170. ISSN 1368-485X.
  3. ^ "EASA.SAS.A.095 : YAKOVLEV YAK-18T" (PDF). easa.europa. Retrieved 17 October 2019.
  4. ^ a b c "Yak-18T 3-view". yak.ru. Retrieved 17 October 2019.
  5. ^ Goode, Richard. (PDF). russianaeros.com. Richard Goode Aerobatics. Archived from the original (PDF) on 29 April 2005. Retrieved 17 October 2019.
  6. ^ Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.
  7. ^ a b c "A.S.Yakovlev designe bureau –:– programs –:– current –:– Yak-18T". www.yak.ru. Retrieved 17 October 2019.[dead link]

Further reading edit

  • Taylor, Michael J.H. (1999). Brassey's world aircraft and systems directory, 1999-2000 (2nd ed.). London: Brassey's Inc. ISBN 1-85753-245-7.
  • Gordon, Yefim; Dmitry; Sergey Komissarov (2005). OKB Yakovlev. Hinkley: Midland Publishing. ISBN 1-85780-203-9.

External links edit

yakovlev, russian, Яковлев, Як, four, five, seat, fully, aerobatic, utility, aircraft, developed, yakovlev, introduced, train, aeroflot, pilots, gained, some, popularity, sportplane, both, inside, outside, former, ussr, powered, vedeneyev, m14p, radial, engine. The Yakovlev Yak 18T Russian Yakovlev Yak 18T is a four or five seat fully aerobatic utility aircraft developed by Yakovlev Introduced to train Aeroflot pilots it has gained some popularity as a sportplane both inside and outside the former USSR It is powered by a 268 298 kW 360 400 hp Vedeneyev M14P radial engine and is designed for stresses of 6 48 3 24 g Yak 18T Yak 18T 1999 example Role Training aircraft Designer Yakovlev First flight 1967 Introduction 1967 Primary users AeroflotSoviet Air Force Number built 750 Variants Technoavia SM 94 This article is about the utility aircraft For the unrelated military trainer aircraft see Yakovlev Yak 18 Yak 18T Contents 1 Design and development 2 Operational history 3 Operators 4 Specifications Yak 18T 5 References 6 Further reading 7 External linksDesign and development editAll the Yak 18 and Yak 18T have in common is the model number The Yak 18T is a unique design despite its nomenclature The 18T was designed in the late 60 s as a civilian aircraft The aircraft has a nosewheel is a four or five seater and has a nine cylinder 360 hp radial The Yak 18T shares systems with the Yak 50 52 family These aircraft all have the 265 kW 355 hp Vedeneyev M14 nine cylinder radial engine as well as the same underlying compressed air system for engine starting brakes undercarriage and flaps The propeller avionics and other parts are also shared The Yak 18T like all Russian aircraft used for training is aerobatic Compared with other four seat light aircraft such as the Cessna 172 or the Piper PA 28 the Yak 18T is only a little wider and longer but it is much heavier and is equipped with a considerably more powerful engine The Yak 18T is perhaps better compared with the Piper Saratoga which has two extra seats but which has a similar maximum weight together with a retractable undercarriage and a similarly powerful engine The Yak 18T is however distinguished by its strong construction aerobatic capability and docile yet responsive handling characteristics The Yak 18T prototype had its first flight in mid 1967 and subsequently the type was placed in series production in Smolensk Operational history editThe Yak 18T went on to become the standard basic trainer with Aeroflot flight schools while small numbers also entered service with the Soviet Air Force as liaison and communications aircraft After approximately 700 were built many for Aeroflot production ceased in the late 1980s to be resumed in 1993 1 In 2011 it was claimed that the type remained in small scale production by the Yakolev Design Bureau 2 although apparently none had been produced in more than a decade Technoavia has marketed the SM 94 its own development of the Yak 18T featuring curved windshield larger fuel tanks and choice of avionics package but production is dependent on orders being placed 1 Operators edit nbsp Cuba Cuban Air Force Former operator citation needed nbsp Moldova Moldova Air Force one aircraft in active service for basic training citation needed nbsp Lithuania Lithuanian National Defence Volunteer Forces citation needed nbsp Soviet Union Aeroflot citation needed Soviet Air Force citation needed nbsp Transnistria Armed Forces of Transnistria citation needed Specifications Yak 18T editData from EASA Yak 18T 3 General characteristicsCrew 1 or 2 Capacity up to 4 subject to CoG limitations Length 8 354 m 27 ft 5 in 4 Wingspan 11 16 m 36 ft 7 in 4 Height 3 4 m 11 ft 2 in 4 Wing area 18 892 m2 203 35 sq ft 5 Airfoil root Clark YH 14 5 tip Clark YH 9 3 6 Empty weight 1 217 kg 2 683 lb Max takeoff weight 1 650 kg 3 638 lb 1 510 kg 3 329 lb for aerobatics dd dd dd Fuel capacity standard 183 L 48 US gal 40 imp gal in two wing tanks including a 3 L 0 79 US gal 0 66 imp gal collector tank or 363 L 96 US gal 80 imp gal in two wing tanks collector or 353 L 93 US gal 78 imp gal in four wing tanks 2x 90l 2x 85l collector Oil 20 L 5 3 US gal 4 4 imp gal dd dd dd Powerplant 1 Vedeneyev M14P 9 cylinder air cooled radial piston engine 268 kW 359 hp or 1x 300 kW 400 hp Vedeneyev M14PF dd dd dd Propellers 2 bladed V 530TA D35 constant speed propeller or MTV3 bladed propellers Performance Maximum speed 262 km h 163 mph 141 kn citation needed Cruise speed 180 210 km h 110 130 mph 97 113 kn 7 Stall speed 114 km h 71 mph 62 kn idle gear down flaps down citation needed Never exceed speed 300 km h 190 mph 160 kn Range 740 km 460 mi 400 nmi citation needed Service ceiling 4 000 m 13 000 ft no Oxygen system g limits 6 4 3 2 at 1 510 kg 3 329 lb 5 2 5 at 1 650 kg 3 638 lb dd dd dd Rate of climb 5 m s 980 ft min citation needed Take off run 200 m 656 ft 7 Landing run 250 m 820 ft 7 Aircraft life 3 500 flight hours 15 000 landings no calendar life limit is established Avionics standard factory fit Baklan 5 VHF ARK 9 ADF IMK IAZ gyro magnetic compass system AGD 1K gyro horizon ZUE 53U turn indicator PP 5 radio altimeterReferences edit a b Yakovlev Yak 18T Airliners net 2009 Retrieved 22 December 2012 Bayerl Robby Berkemeier Martin et al 2011 World Directory of Leisure Aviation 2011 12 Lancaster WDLA UK p 170 ISSN 1368 485X EASA SAS A 095 YAKOVLEV YAK 18T PDF easa europa Retrieved 17 October 2019 a b c Yak 18T 3 view yak ru Retrieved 17 October 2019 Goode Richard Yak 18T PDF russianaeros com Richard Goode Aerobatics Archived from the original PDF on 29 April 2005 Retrieved 17 October 2019 Lednicer David The Incomplete Guide to Airfoil Usage m selig ae illinois edu Retrieved 16 April 2019 a b c A S Yakovlev designe bureau programs current Yak 18T www yak ru Retrieved 17 October 2019 dead link Further reading editTaylor Michael J H 1999 Brassey s world aircraft and systems directory 1999 2000 2nd ed London Brassey s Inc ISBN 1 85753 245 7 Gordon Yefim Dmitry Sergey Komissarov 2005 OKB Yakovlev Hinkley Midland Publishing ISBN 1 85780 203 9 External links edit nbsp Wikimedia Commons has media related to Yakovlev Yak 18T Richard Goode Aerobatics Yak 18T product page Pilot Magazine Retrieved from https en wikipedia org w index php title Yakovlev Yak 18T amp oldid 1224014832, wikipedia, wiki, book, books, library,

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