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|CallAir A-9B glider tug at Driggs Idaho in June 1994|
|National origin||United States|
|Manufacturer||Intermountain Manufacturing Company, Aero Commander|
|Developed from||CallAir Model A|
The IMCO CallAir A-9 is a small agricultural aircraft that first flew in 1962, a development of the company's previous successful crop-dusters. It is typical of aircraft of its type - a single-seat aircraft with a low wing incorporating spraying gear.
Design and development
Following the purchase of Call Aircraft Company, who had built the CallAir Model A series of light utility and agricultural aircraft, by Intermountain Manufacturing Company (IMCO) in 1962, IMCO produced a new agricultural derivative of the Callair, the CallAir A-9. Production of the new aircraft started in 1963.
Like the earlier CallAir aircraft, the A-9 is a single-engined monoplane with a braced low wing. It is of mixed construction, with a fabric-covered steel-tube fuselage structure and a wood-and-fabric wing. The pilot sits behind the chemical hopper, and the cockpit is enclosed by two removable, bottom-hinged doors that form the left and right side windows. The aircraft is powered by a single Lycoming O-540 flat-six piston engine. Later, some A-9s have been adapted for glider towing operations.
IMCO was in turn purchased by Rockwell International in 1966, which built the plane under its Aero Commander division before shifting production to Mexico in 1971, under a joint venture there called AAMSA. Production continued until 1984.
- Original variant, powered by a 235 hp (175 kW) Lycoming O-540-B2B5. Built by IMCO and Aero Commander (as the Sparrow Commander)
- Enlarged A-9 with a 400 hp (298 kW) Lycoming IO-720-A1A engine and 42 ft 8 in (13.00 m) wingspan. First flight January 15, 1966. Built by IMCO and Aero Commander (as the Snipe Commander).
- A-9 Super
- Version with 290 hp (216 kW) Lycoming IO-540. Built by Aero Commander (as the Quail Commander) and by AAMSA (as the A9B-M Quail)
Specifications (AAMSA A9B-M Quail)
Data from Jane's All The World's Aircraft 1982-83 
- Crew: one
- Capacity: 210 US gal (795 litres) or 1,600 lb (725 kg) of chemicals
- Length: 24 ft 0 in (7.32 m)
- Wingspan: 34 ft 9 in (10.59 m)
- Height: 7 ft 8 in (2.34 m)
- Wing area: 181.9 ft² (16.90 m²)
- Empty weight: 1,800 lb (817 kg)
- Max. takeoff weight: 3,800 lb (1,725 kg)
- Powerplant: 1 × Lycoming IO-540-K1A-5 6-cylinder, horizontally opposed engine, 300 hp (224 kW)
- Maximum speed: 120 mph (104 knots, 193 km/h) at sea level
- Cruise speed: 100 mph (87 knots, 161 km/h) (normal operating speed)
- Range: 300 mi (260 nmi, 483 km)
- Service ceiling: 16,000 ft (4,875 m)
- Rate of climb: 850 ft/min (4.3 m/s)
- Aircraft of comparable role, configuration and era
- Taylor 1965, pp. 246–247.
- "A-9 Owners Manual: Serials 1048, 1111, 1117 & Up". Retrieved 23 February 2013.
- Taylor 1966, pp. 261–262.
- Taylor 1982, pp. 155–156.
- Taylor, John W. R. Jane's All The World's Aircraft 1965-66. London: Sampson Low, Marston & Company, 1965.
- Taylor, John W. R. Jane's All The World's Aircraft 1966-67. London: Sampson Low, Marston & Company, 1966.
- Taylor, John W. R. Jane's All The World's Aircraft 1982-83. London:Jane's Yearbooks, 1982. ISBN 0-7106-0748-2.
Media related to CallAir A-9 at Wikimedia Commons