Szekely SR-3
| SR-3 | |
|---|---|
| |
| SR-3 Model L - Flathead version of the Szekely SR-3 aircraft engine, Pima Air & Space Museum | |
| Type | Radial engine |
| Manufacturer | Szekely |
Szekely aircraft engines were three-cylinder radial engines built in Holland, Michigan in the 1920s and 30s. They were used to power small aircraft such as the Rearwin Junior, Taylor H-2 and American Eagle Eaglet. Often criticized for reliability issues and design flaws, many were replaced with better engines in their original airframes. Few examples still exist but a museum quality example is on display in the Holland Museum in Holland, Michigan.
Variants
[edit]Data from:Jane's all the World's Aircraft 1931[1]
- SR-3 O
- Overhead valve combustion chamber, compression ratio 4.6:1, 45 hp (34 kW) at 1,750 rpm.
- SR-3 L
- Side-valve combustion chamber, compression ratio 5:1, 30 hp (22 kW) at 1,750 rpm.
Applications
[edit]- American Eagle Eaglet
- Buhl Bull Pup
- Curtiss-Wright Junior
- Lambach HL.1
- Nicholson Junior KN-2
- Prest Baby Pursuit
- Rearwin Junior
- Taylor H-2
Specifications (SR-3 Model O)
[edit]Data from American Engine Specifications,[2] Jane's all the World's Aircraft 1938,[3] Jane's all the World's Aircraft 1931[1]
General characteristics
- Type: Three-cylinder radial engine
- Bore: 4+1⁄8 in (105 mm)
- Stroke: 4+3⁄4 in (121 mm)
- Displacement: 191 cu in (3.13 L)
- Length: 25 in (635 mm) overall
- Diameter: 36 in (914 mm) (Model L 30 in (760 mm))
- Dry weight: 147 lb (67 kg)
Components
- Valvetrain: one camshaft per cylinder: pushrod-operated overhead inlet outlet valves, one each per cylinder; (Model L valves directly operated by tappets.)
- Fuel system: Stromberg NA-S3 Carburetor or Zenith equivalent
- Cooling system: Air-cooled
- Bosch FU6/3 or Scintilla magnetoes
Performance
- Power output: 45 hp (34 kW) at 1,750 rpm
- Specific fuel consumption: 0.60 lb/(hp·h) [0.365 kg/(kW·h)]
- Oil consumption: 0.16 lb/(hp·h)
See also
[edit]Comparable engines
Related lists
References
[edit]
Wikimedia Commons has media related to Szekely SR-3.
- ^ a b Grey, C.G., ed. (1931). Jane's all the World's Aircraft 1931. London: Sampson Low, Marston & company, ltd. p. 86d.
- ^ "Table 4: American Engine Specifications". Aviation. Vol. 30, no. 7. July 1931. p. 43.
- ^ Grey, C.G.; Bridgman, Leonard, eds. (1938). Jane's all the World's Aircraft 1938. London: Sampson Low, Marston & company, ltd. p. 102d.
External links
[edit]- "Szekely SR-3 L" Old Rhinebeck Aerodrome, retrieved October 30, 2007