Ivchenko AI-14R / AI-14RA — Engine Manual Collection

Understanding What These Engine Manuals Are — and Are Not

These are original factory engineering and service publications issued by OKB-478 (Soviet Union) and WSK Kalisz / PZL Kalisz (Poland) — not simplified guides, not hobbyist plans, not RC or scale-model references. They assume professional-level technical reading ability: tolerances, material specifications, maintenance sequences, and regulatory references are presented as issued by the original manufacturer.

No single unified documentation set for the AI-14 series survives in any archive. What exists are individual publications — service manuals, technical descriptions, user's manuals, and maintenance instructions — issued across different production years, languages, and national certification authorities. This collection consolidates the largest known digital grouping of surviving AI-14 series primary-source documents.

If you are looking for a simplified illustrated guide to build a replica or an RC model, this is not the right product for you.

If you are a researcher, restorer, aero-club engineer, museum professional, or serious enthusiast who needs access to the deepest available layer of surviving primary-source factory documentation for the AI-14R or AI-14RA — this is it.

Engine Profile: Ivchenko AI-14R (АИ-14Р)

The AI-14R is a Soviet-designed air-cooled, supercharged, geared 9-cylinder single-row radial piston engine first qualified in 1947 and completing state trials in 1950. Designed by Alexander Ivchenko's OKB-478 bureau as a clean-sheet postwar light utility and training engine, it became the backbone of Eastern Bloc and Chinese basic flight training and light utility aviation through the Cold War and beyond.

Licensed production was carried out by WSK Kalisz / PZL Kalisz in Poland and by Zhuzhou in China. Evolved descendants — including the M14P series — remained in production past 2000.

Primary Aircraft Applications

• Military / Training: Yakovlev Yak-18, Nanchang CJ-6 (via Chinese HS-6 variant)
• Civilian / Utility: PZL-104 Wilga, Yakovlev Yak-12, Antonov An-14 "Pchelka", Kamov Ka-15 / Ka-18 (AI-14V helicopter variant)

Key Variants

• AI-14R: Standard 260 hp baseline — fixed-wing, 0.787:1 planetary reduction gear
• AI-14RA: Polish-certified production variant
• AI-14RC: Further Polish variant (covered in 1979 maintenance instructions)
• AI-14V: Helicopter-optimised variant
• AI-14RF: Uprated to 300 hp
• Huosai HS-6 / HS-6A: Chinese licence-built versions
• Avia M462: Czechoslovakian variant for the Zlín Z-37

Technical Specifications

• Type: Air-cooled, supercharged, geared single-row radial piston engine
• Cylinders: 9 (single-row radial)
• Displacement: 10.16 litres (620 cu in)
• Takeoff Power: 260 hp at 2,600 RPM
• Bore × Stroke: 105 mm × 130 mm (4.13 in × 5.12 in)
• Compression Ratio: 5.9:1
• Dry Weight: 197 kg (434 lbs)
• Fuel: Aviation gasoline, minimum 70–91 octane (B91/115 or 100LL compatible with proper monitoring)
• Reduction Gear: 0.787:1 planetary gear system
• Supercharger: Single-stage, single-speed centrifugal
• Starting: Compressed-air mechanism (no electric starter required)
• Lubrication: Dry-sump system — sustained inverted / aerobatic flight capable

Manuals Included in This Collection

• AI-14R, 6th Series — Service Manual and Schedule of Periodic Inspections — WSK Kalisz, Warsaw, 1967. Ministry of Transport Civil Aircraft Inspection Board accepted original (serial KA808746). Covers 6th-series production standard AI-14R.
• AI-14RA Aero-Engine — Technical Description — WSK Kalisz, Warsaw, 1972. Note: all AI-14R designations in this text are valid for the AI-14RA engine.
• AI-14RA Aircraft Engine — User's Manual — WSK Kalisz, Warsaw, 1967. Ministry of Transport Civil Aircraft Inspection Board accepted original.
• АИ-14Р — Авиационный Двигатель: Техническое Описание (Russian edition) — Государственное Научно-Техническое Издательство ОБОРОNGИЗ, Moscow, 1961. Soviet primary source, Russian language.
• AI-14RA / AI-14RC — Maintenance, Inspection and Service Instructions (Documents WT-14.03.01K / WT-14.04.01K) — PZL Kalisz, December 1979. Part I: Maintenance and Inspection; Part II: Service Instructions. Polish version approved by CACA.

Current Status

The AI-14R remains in active use in preserved vintage aircraft: PZL-104 Wilgas, Yakovlev Yak-12s, Yak-18s, and Nanchang CJ-6 trainers continue to fly. Type certificate intellectual property is held by Ivchenko-Progress (Ukraine) and WSK "PZL-Kalisz" (Poland). Active service bulletins and airworthiness directives are monitored via the Polish CAA and national sport aviation authorities overseeing vintage and experimental operations.

⚠️ Regulatory Notice: Under FAA 14 CFR § 43.13 and EASA Part-M, any mechanic performing maintenance on an active aircraft must use current, manufacturer-approved revision-controlled data. This archival document does not satisfy that requirement.

This is an archival, static-copy edition fixed at its original publication date. Intended for historical reference, flight simulation, museum restoration, and educational use only. Not approved for active airworthiness maintenance under FAA 14 CFR § 43.13, EASA Part-M, or equivalent international regulations. Operators of active aircraft must use current, revision-controlled publications from the Type Certificate holder or an authorized distributor.

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