Specifications
Data from Airships Heritage Trust, Flight International (sources do not agree on all values; and as Mayfly never flew, performance figures are theoretical. Engine data from Lumsden)
General characteristics
- Crew: 20
- Length: 512 ft in (156.1 m)
- Diameter: 46 ft in (14.6 m)
- Volume: 660,000 ft3 (18,800 m3)
- Empty weight: 44,000 lb (19,900 kg)
- Useful lift: 48,000 lb (21,800 kg)
- Powerplant: 2 × Wolseley 160 hp (each driving 2 propellers), 147 hp (110 kW) each each
Performance
- Cruise speed: 42 mph (68 km/h)
- Range: 1,090 miles (1,750 km)
- Endurance: 24 hours
- Service ceiling: 1,500 ft (460 m)
- Structure
- Main structural material: Duralumin
- Spacing of main frames: 25 ft (7.6 m)
- Fineness ratio: 10.7:1
- Number of main longitudinals: 12
- Number of gasbags: 17
Read more about this topic: HMA No. 1