Pratt & Whitney R-2180-A Twin Hornet

R-2180-A Twin Hornet

A Douglas DC-4E powered by four P&W R-2180 Twin Hornet engines
Type	Radial engine
National origin	United States
Manufacturer	Pratt & Whitney
Major applications	Douglas DC-4E
Number built	30
Developed from	Pratt & Whitney R-1690
Developed into	Pratt & Whitney R-2800 Pratt & Whitney R-4360

The Pratt & Whitney R-2180-A Twin Hornet was a radial engine developed in the United States by Pratt & Whitney. It had two rows of seven cylinders each.

Applications

Specifications (R-2180-A)

Data from The Engines of Pratt & Whitney: A Technical History^[1]

General characteristics

Type: 14-cylinder air-cooled, twin-row radial engine
Bore: 5.75 in. (146 mm)
Stroke: 6.00 in. (152 mm)
Displacement: 2,181 in³ (35.7 L)
Length: 76.20 in (1.94 m)
Diameter: 54 in (1.37 m)
Dry weight: 1,565 lb-1,647 lb

Components

Cooling system: Air-cooled

Performance

Power output: 1,200-1,500 hp

References

↑ Connors, p.98

Connors, Jack (2010). The Engines of Pratt & Whitney: A Technical History. Reston. Virginia: American Institute of Aeronautics and Astronautics. ISBN 978-1-60086-711-8.
Gunston, Bill (2006). World Encyclopedia of Aero Engines, 5th Edition. Phoenix Mill, Gloucestershire, England, UK: Sutton Publishing Limited. ISBN 0-7509-4479-X.

External links

Pratt & Whitney aircraft engines

Radial engines	R-985 R-1340 R-1535 R-1690 R-1830 R-1860 R-2000 R-2060 R-2180-A R-2180-E R-2270 R-2800 R-4360 Double Wasp Hornet (A) Hornet B Twin Hornet Twin Wasp (R-1830) Twin Wasp (R-2000) Twin Wasp E Twin Wasp Junior Wasp series Wasp Wasp Junior Wasp Major Yellow Jacket

H piston engines	X-1800/XH-2600 XH-3130 (XH-3730)

Free-piston gas turbines	PT1

Turbojets	JT3C JT4 JT6 JT7 JT8A JT9 JT11 JT12 J42 J48 J52 J57 J58 J60 J75 J91

Turbofans	GP7000† JT3D JT4D JT8D JT9D JTF10 JTF10A JT10D JTF14 JTF16 JTF17 JTF22 PW1000G PW1120 PW2000 PW4000 PW5000 PW6000 STF200 SuperFan† V2500† F100 F105 F117 F119 F135 F401 TF30 TF33 RM8

Turboprops/Turboshafts	APW34† JFTD12 PT2 PT3 PT4 PT5 T34 XT45 T52 XT57 T73 T800-APW†

Propfans	578-DX†

Rocket engines	RL10

Aeroderivative gas turbine engines	GG3/FT3 GG4/FT4 FT8

Subsidiaries	Pratt & Whitney Canada Pratt & Whitney Rocketdyne

Key people	Leonard S. Hobbs George J. Mead Wright Parkins Perry Pratt Frederick Rentschler Richard "Dick" Soderberg Andrew Willgoos

† Joint development aeroengines

United States military piston aircraft engine designation system

H (four-bank H-configuration inline)	H-1640 XH-2240 H-2470 XH-2600 XH-3130 XH-3730 H-4070

I (inverted-V inline)	IV-1430 IV-2040 IV-2220

L (single-bank inline)	L-330 L-365 L-375 L-390 L-410 L-440 L-510 L-825

O (opposed)	O-15 O-40 O-45 O-90 O-100 O-145 O-150 O-170 O-175 O-180 O-190 O-200 (C) O-200 (F) O-205 O-235 O-290 O-300 O-335 O-360 (C) O-360 (L) O-405 O-425 O-435 O-470 O-480 O-520 O-540 (F) O-540 (L) O-550 O-580 O-805 O-1230

R (radial)	R-250 R-265 R-270 R-370 (LB) R-370 (K) R-420 R-440 R-500 R-540 (W) R-540 (K) R-545 R-550 R-600 R-670 R-680 R-720 R-755 R-760 R-790 R-830 R-915 R-975 DR-980 R-985 R-1044 R-1300 R-1340 R-1454 R-1510 R-1535 R-1640 R-1670 R-1690 R-1750 R-1820 R-1830 R-1860 R-2000 R-2060 R-2160 R-2180 R-2600 R-2800 R-3350 R-4090 R-4360 XR-7755

V (upright-V inline)	V-720 V-770 V-1150 V-1237 V-1400 V-1410 V-1440 V-1460 V-1510 V-1560 V-1570 V-1650 (L) V-1650 (P) V-1710 V-1950 V-3420

W (three-bank W-configuration inline)	W-2779

See also: X-1800 US military gas turbine aeroengines Piston engine configurations

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