Gnome-Rhône 7K
(Redirected from IAR K7-I 20)
| 7K | |
|---|---|
| |
| Type | Radial engine |
| Manufacturer | Gnome et Rhône |
The Gnome-Rhône 7K Titan Major was a seven-cylinder 370 hp (270 kW) air-cooled radial engine, that started life as an enlarged Gnome-Rhône 5K with two extra cylinders.
Development
[edit]The Gnome-Rhône 5K was itself a licensed version of the Bristol Titan. The 7K is very comparable to the Bristol Neptune seven-cylinder engine since they used the same technology.[1] The 7K was followed by the larger and more powerful nine-cylinder 550 hp (405 kW) Gnome-Rhône 9K Mistral. Gnome-Rhône later responded to the need for a more powerful engine by developing the 7K into a two-row version that became the Gnome-Rhône14K Mistral Major.
Variants
[edit]- IAM K7
- Licence production in Yugoslavia by Industrija Aeroplanskih Motora- Rakovica (IAM).
- IAR 7K
- Licence production in Romania by Industria Aeronautică Română (IAR).
Applications
[edit]
Specifications (7Kd)
[edit]Data from [2]
General characteristics
- Type: Seven-cylinder air-cooled radial engine.
- Bore: 146 mm (5.75 in)
- Stroke: 165 mm (6.50 in)
- Displacement: 19.3 L (1,180 cu in)
- Length: 146 mm (5.75 in)
- Diameter: 1,235 mm (48.62 in)
- Dry weight: 270 kg (600 lb)
Components
- Valvetrain: Pushrod operated overhead valves, two per cylinder
- Supercharger: (7Ksd - single speed centrifugal blower)
- Fuel system: Carburetor
- Fuel type: Gasoline
- Cooling system: Air-cooled
Performance
- Power output: 7Kd - 260 kW (350 hp) at 2,000 rpm at sea level for take-off
- 7Ksd - 272 kW (365 hp) at 2,000 rpm at 1,500 m (4,900 ft)
- 7Ksd - 250 kW (340 hp) at 2,000 rpm at 4,000 m (13,000 ft)
- Compression ratio: 5.5:1
See also
[edit]Related development
Comparable engines
Related lists
References
[edit]
Wikimedia Commons has media related to Gnome et Rhône 7K.
Notes
[edit]- ^ Gunston 1989, p.74.
- ^ Moteurs Gnome-Rhône series K (PDF) (in Spanish). Paris: Société Des Moteurs Gnome-Rhône. Archived from the original (PDF) on 6 October 2014. Retrieved 3 October 2014.
Bibliography
[edit]- Gunston, Bill. World Encyclopedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9