Engineering:Miller JM-2
| JM-2 | |
|---|---|
| Role | Homebuilt air racer |
| National origin | United States |
| Manufacturer | JW Miller Aviation |
| Designer | Jim W Miller |
| Status | Production completed |
| Variants | Miller-Bohannon JM-2 Pushy Galore |
The Miller JM-2 was an American Formula One Air Racing homebuilt aircraft that was designed by Jim W Miller and produced by JW Miller Aviation of Marble Falls, Texas. When it was available, the aircraft was supplied in the form of plans for construction by amateurs.[1]
Design and development
Miller opted for an unorthodox configuration in developing a racing aircraft that would be as fast as possible on 100 hp (75 kW). The JM-2 features a cantilever mid-wing, a single-seat enclosed open cockpit under a bubble canopy, tricycle landing gear with fixed main wheels and a retractable nose wheel, and a single engine in pusher configuration, mounted within a fan shroud, with the spinner acting as the aircraft's tailcone. The fan shroud structure provides a place to mount the rudders and the tailplane is mounted high in T-tail configuration as an extension of the shroud. There is a small canard surface mounted on the nose.[1][2]
The aircraft is of mixed construction, with the fuselage made from four fiberglass panels and the 15.0 ft (4.6 m) span wing covered in fiberglass and resin-reinforced honeycomb material. As required by the Formula One rules, the engine used was a 100 hp (75 kW) Continental O-200B powerplant, the "B" being the pusher-configured version of the engine.[1]
The JM-2 has an empty weight of 630 lb (290 kg) and a gross weight of 1,100 lb (500 kg), giving a useful load of 470 lb (210 kg). With full fuel of 12 U.S. gallons (45 L; 10.0 imp gal) the payload is 398 lb (181 kg).[1]
The JM-2 was further developed into the one-of-a-kind racing aircraft, the Miller-Bohannon JM-2 Pushy Galore.[3]
Operational history
By October 2013 three examples had been registered in the United States with the Federal Aviation Administration including the sole Miller-Bohannon JM-2 Pushy Galore. None of the aircraft remain registered.[4][when?]
One of the two stock JM-2s built was destroyed while racing in the Reno Air Races at Reno, Nevada on 15 September 1989, when it flew through a dust devil and broke up in flight, killing the pilot.[5][6]
Specifications (JM-2)
Data from Plane and Pilot[1]
General characteristics
- Crew: one
- Length: 19 ft 0 in (5.79 m)
- Wingspan: 15 ft 0 in (4.57 m)
- Empty weight: 630 lb (286 kg)
- Gross weight: 1,100 lb (499 kg)
- Fuel capacity: 12 U.S. gallons (45 L; 10.0 imp gal)
- Powerplant: 1 × Continental O-200B four cylinder, air-cooled, four stroke aircraft engine, 100 hp (75 kW)
- Propellers: 4-bladed fan mounted in a ducted shroud
Performance
- Maximum speed: 235 mph (378 km/h, 204 kn)
- Cruise speed: 190 mph (310 km/h, 170 kn)
- Stall speed: 70 mph (110 km/h, 61 kn)
- Range: 300 mi (480 km, 260 nmi)
- Rate of climb: 1,600 ft/min (8.1 m/s)
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Plane and Pilot: 1978 Aircraft Directory, page 147. Werner & Werner Corp, Santa Monica CA, 1977. ISBN:0-918312-00-0
- ↑ "American airplanes: Mi - Mu". Aerofiles. 2001-02-04. http://aerofiles.com/_mi.html. Retrieved 2013-10-13.
- ↑ "Miller-Bohannon JM-2 Pushy Galore". Airventure Museum. 2013. http://www.airventuremuseum.org/collection/aircraft/Miller-Bohannon%20JM-2%20Pushy%20Galore.asp. Retrieved 2013-10-13.
- ↑ Federal Aviation Administration (13 October 2013). "Make / Model Inquiry Results". http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=JM-2&PageNo=1. Retrieved 13 October 2013.
- ↑ Federal Aviation Administration (13 October 2013). "N-Number Inquiry Results - N74M". http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=74M. Retrieved 13 October 2013.
- ↑ National Transportation Safety Board (26 June 1992). "Brief of Accident". http://dms.ntsb.gov/aviation/AccidentReports/ssltatituwm5kh2pdh0oeu551/Y10132013120000.pdf. Retrieved 13 October 2013.
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