Pratt & Whitney R-985 Wasp Junior
Performance
Power output: 400 hp (298 kW) at 2,200 RPM up to 5,000 ft (1,500 m); 450 hp (336 kW) at 2,300 RPM for takeoff Specific power: 0.406 hp/in³ (18.5 kW/l) Compression ratio: 6.0:1 Power-to-weight ratio: 0.625 hp/lb (1.03 kW/kg) This is the highest altitude at which the engine can achieve its full continuous power rating.

Pratt & Whitney R-985 Wasp Junior

Section Title: Performance
Table Section Text: Power output: 400 hp (298 kW) at 2,200 RPM up to 5,000 ft (1,500 m); 450 hp (336 kW) at 2,300 RPM for takeoff Specific power: 0.406 hp/in³ (18.5 kW/l) Compression ratio: 6.0:1 Power-to-weight ratio: 0.625 hp/lb (1.03 kW/kg) This is the highest altitude at which the engine can achieve its full continuous power rating.

Engine	Power, continuous	Critical altitude	Power, takeoff	Compression ratio	Supercharger gear ratio	Octane rating	Dry weight

Wasp Jr. A	300 hp (224 kW) at 2,000 RPM	sea level	same	5.0:1	7:1	68	565 lb (256 kg)

Wasp Jr. TB	420 hp (313 kW) at 2,200 RPM	sea level	440 hp (328 kW) at 2,300 RPM	6.0:1	8:1	80	640 lb (290 kg)

Wasp Jr. SB	400 hp (298 kW) at 2,200 RPM	5,000 ft (1,500 m)	450 hp (336 kW) at 2,300 RPM	6.0:1	10:1	80/87	640 lb (290 kg)

Wasp Jr. T1B2	450 hp (336 kW) at 2,300 RPM	1,500 ft (460 m)	same	6.0:1	10:1	80/87	653 lb (296 kg)

Wasp Jr. B4	450 hp (336 kW) at 2,300 RPM	2,300 ft (700 m)	same	6.0:1	10:1	80/87	684 lb (310 kg)

Wasp Jr. SC-G	525 hp (391 kW) at 2,700 RPM	9,500 ft (2,900 m)	600 hp (447 kW) at 2,850 RPM	6.7:1	10:1	100	864 lb (392 kg)

Sentence(s)

Wasp Junior T1B2 had 450 hp (336 kW) up to 1,500 ft (460 m).
Wasp Junior T1B2, was able to sustain 450 hp (336 kW) up to 1,500 ft (460 m) while still matching the SB's power.
Wasp Junior T1B2 had 450 hp (336 kW) power up to 1,500 ft (460 m).

final_sentence: Wasp Junior T1B2 had 450 hp (336 kW) up to 1,500 ft (460 m).
final_sentence: Wasp Junior T1B2, was able to sustain 450 hp (336 kW) up to 1,500 ft (460 m) while still matching the SB's power.
final_sentence: Wasp Junior T1B2 had 450 hp (336 kW) power up to 1,500 ft (460 m).