Shvetsov ASh-21
The Shvetsov ASh-21 is a seven-cylinder single-row air-cooled radial aero engine.
| ASh-21 | |
|---|---|
 | |
| Type | Radial engine |
| Manufacturer | Shvetsov OKB-19 in Perm' |
| First run | 1945 |
| Number built | 7,636 |
| Developed from | Shvetsov ASh-82 |
Design and development
The ASh-21 is basically a single-row version of the Shvetsov ASh-82. The ASh-21 also incorporates a number of parts from the ASh-62 radial engine. Design began in 1945, and by 1947 testing had finished and production had begun. Between 1947 and 1955 7,636 ASh-21 engines had been built in the USSR and beginning in 1952 it was produced in Czechoslovakia as the M-21.
Applications
- Yak-11
- Yak-16
- Beriev Be-8
- Beriev Be-30 (prototype)
Specifications (Shvetsov ASh-21)
Family tree of Shvetsov engines
General characteristics
- Type: Seven-cylinder, air-cooled, single-row, radial engine
- Bore: 155.5 mm (6.12 in)
- Stroke: 155 mm (6.10 in)
- Displacement: 20.6 L (1,257 cu in)
- Dry weight: 487 kg (1,074 lb)
Components
- Supercharger: Single stage, single speed, geared centrifugal supercharger
- Fuel system: Carburetor
- Cooling system: Air
Performance
- Power output:
- 520 kW (700 hp) at 2,300 rpm takeoff power
- 459 kW (615 hp) at 1,700 m (5,580 ft)
- Specific power: 25.5 kW/L (0.56 hp/in³)
- Compression ratio: 6.4:1
- Power-to-weight ratio: 1.07 kW/kg (0.65 hp/lb)
gollark: When someone asked for monotonic time to be exposed properly, GUESS WHAT, they decided to "fix" the whole thing in the most Go way possible by "transparently" adding monotonic time to the existing time handling, in some bizarre convoluted way which was a breaking change for lots of code and which limited the range time structs could represent rather a lot.
gollark: Rust, which is COOL™, has monotonic time and system time and such as separate types. Go did *not* have monotonic time for ages, but *did* have an internal function for it which wasn't exposed because of course.
gollark: That article describes, among other things, somewhat poor filesystem interaction handling, and a really stupid way monotonic time was handled.
gollark: https://fasterthanli.me/articles/i-want-off-mr-golangs-wild-ride
gollark: Also, it handles OS interaction poorly and tries to hide complexity sometimes in ways which do not work.
References
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Wikimedia Commons has media related to Shvetsov ASh-21. |
- Gunston, Bill (1986). World Encyclopedia of Aero Engines. Wellingborough: Patrick Stephens. p. 175.
- Kotelnikov, Vladimir (2005). Russian Piston Aero Engines. Crowood Press Ltd. pp. 118–119.
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