Blohm & Voss Ha 137 - RC Groups
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Feb 14, 2014, 02:31 PM
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Blohm & Voss Ha 137


from wikipedia

The Blohm & Voss Ha 137 was a German ground-attack aircraft of the 1930s. It was Blohm & Voss' entry into the contest to equip the re-forming Luftwaffe with its first purpose-built dive bomber. Although the contest would eventually be won by the Junkers Ju 87.

Built entirely of metal and using a semi-monocoque fuselage, the design looked more like a fighter - specifically like the Heinkel He 112 - than a dive bomber. The wing used the tubular spar system, the inner portion of which was sealed as a fuel tank holding 270 L (70 US gal). The design used fixed landing gear, so in order to reduce their length, and thus the drag, the wings featured a sharp inverted gull wing bend at about span. The wheels were mounted on two shock absorbers each, so the fairing around the gear was large enough to allow the mounting of a 7.92 mm (.312 in) MG 17 machine gun for testing, and a 20 mm MG FF cannon if required. Two additional 7.92 mm (.312 in) MG 17s were mounted in the fuselage decking above the engine.

Both in-line and radial engines were considered for this project.

General characteristics

Crew: 1
Length: 9.45 m (31 ft 0 in)
Wingspan: 11.15 m (36 ft 7 in)
Height: 2.8 m (9 ft 2 in)
Wing area: 23.5 m2 (253 sq ft)
Empty weight: 1,814 kg (3,999 lb)
Gross weight: 2,415 kg (5,324 lb)
Powerplant: 1 Junkers Jumo 210Aa V-12 liquid-cooled piston engine, 440 kW (590 hp) for take-off

455 kW (610 hp) at 2,600 m (8,530 ft)

Propellers: 3-bladed metal propeller

Performance

Maximum speed: 297 km/h (185 mph; 160 kn) at 2,000 m (6,562 ft)
Cruising speed: 290 km/h (180 mph; 157 kn) at 2,000 m (6,562 ft)
Range: 575 km (357 mi; 310 nmi)
Service ceiling: 7,000 m (22,966 ft)
Rate of climb: 8.33 m/s (1,640 ft/min)
Time to altitude: 2,000 m (6,562 ft) (without external load) in 4 minutes

4,000 m (13,123 ft) (without external load) in 9 minutesArmament

Guns:
2 x 7.92 mm (0.312 in) MG 17 machine guns in the forward fuselage decking
2 7.92 mm (0.312 in) MG 17 machine guns or 2 20 mm (0.787 in) MG FF cannon in undercarriage fairings
Bombs:
4 50 kg (110.2 lb) SC50 bombs







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