Melsheimer FM-1
The Melsheimer FM-1 is an American single-seat, high-wing, FAI Open Class glider that was designed and constructed by Frank Melsheimer.[1][2][3]
| FM-1 | |
|---|---|
 | |
| The FM-1 in its original prototype configuration with the T-tail | |
| Role | Glider |
| National origin | United States |
| Designer | Frank Melsheimer |
| First flight | 1968 |
| Introduction | 1968 |
| Status | Production completed |
| Number built | One |
Design and development
The FM-1 was first flown in 1968. The designation indicates the designer's initials.[1][2]
The FM-1 features mixed construction. The aft fuselage and wings are constructed from wood, with the forward fuselage made from welded steel tubing, covered in fibreglass. The wing employs a NACA 4400R airfoil. The aircraft was originally constructed with a T-tail, but this was later changed to a conventional low tail. The cockpit accommodation is one seat in a semi-reclining position.[1][2]
Only one example was completed and registered in the Experimental - Amateur-built category.[1][2][3]
Operational history
As of May 2011 the FM-1 was still on the Federal Aviation Administration registry.[3]
Specifications (FM-1)
Data from Sailplane Directory and Soaring[1][2]
General characteristics
- Crew: one
- Wingspan: 51 ft 0 in (15.54 m)
- Wing area: 125 sq ft (11.6 m2)
- Aspect ratio: 21:1
- Airfoil: NACA 4400R
- Empty weight: 500 lb (227 kg)
- Gross weight: 750 lb (340 kg)
Performance
- Maximum glide ratio: Estimated 35:1 at 60 mph (97 km/h)
- Rate of sink: 108 ft/min (0.55 m/s) at 40 mph (64 km/h)
- Wing loading: 6.0 lb/sq ft (29 kg/m2)
References
- Activate Media (2006). "FM-1 Melsheimer". Archived from the original on 19 August 2012. Retrieved 30 May 2011.
- Said, Bob: 1983 Sailplane Directory, Soaring Magazine, page 48. Soaring Society of America November 1983. USPS 499-920
- Federal Aviation Administration (May 2011). "Make / Model Inquiry Results". Retrieved 15 May 2011.