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| One of the British aviation industry's most successful postwar designs, the Hawker Siddeley HS.125 was one of the most successful first generation business jets and in developed form remains in production with Raytheon (refer separate entry). Dehavilland initially called the DH.125 the Jet Dragon, while just eight initial Series 1 production aircraft were built before deliveries switched to the more powerful Series 1A (the A suffix denoting North America) and Series 1B (the B denoting sales for world markets). The improved Series 3A and 3B (29 built) had a higher gross weight, while the 3AR and 3BR (36 built) were heavier still with extra fuel for greater range. When de Havilland merged into Hawker Siddeley the Series 4, which featured numerous minor refinements, was marketed as the Series 400A and 400B and 116 were built. The final Viper turbojet powered 125 built was the Series 600A and 600B. The Series 600 features a stretched fuselage taking standard main cabin seating from six to eight, or up to 14 in a high density configuration. Other changes included more powerful RollsRoyce Viper 60122 turbojets, lengthened vertical tail and ventral fin and a fuel tank in the extended dorsal fin. The 600 first flew on January 21 1971 and it became the standard roduction model until the Garrett TFE731 turbofan powered 700 series was introduced described separately) in 1976. Some Series 400s and 600's were re-engined with the newer, quieter and more fuel Efficient Garrett TFE731s as HS.125-400Fs and HS.125-600F's which denoted their newer ""fan"" status.The introduction of the BAe 125-700 in 1976 brought with it significant performance and fuel economy benefits as the -700 incorporated Garrett TFE731 turbofans. The 125-700 first flew on June 19 1976, and the model remained in production until it was replaced by the 125-800 |
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| Seating (normal) |
8 |
Max Takeoff (lbs) |
24,800 |
| Seating (maximum) |
- |
Certified Ceiling (ft) |
41,000 |
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| Engines |
2 Hon TFE731-3R-1H |
To (Sealevel, ISA Temp) (ft) |
5,800 |
| Output lbs ea. Flat Rating |
3,700 |
Landing Distance (ft) |
2,019 |
| Maximum Mach No. |
0.78 |
Max Range (fuel) (nm) |
2,124 |
| High Speed Cruise (Kts) |
425 |
Max Range (payload) (nm) |
1,953 |
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| Flight Time 300nm |
0 + 52 |
Flight Time 1000nm |
2 + 44 |
| Flight Time 600nm |
1 + 39 |
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| External |
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Internal |
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| Length (ft) |
50.80 |
Length (ft) |
21.30 |
| Height (ft) |
17.60 |
Height (ft) |
5.80 |
| Span (ft) |
47.00 |
Width: Max floor (ft) |
5.90 |
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