# Curtiss R-600 Challenger

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Aircraft engine

R-600 Challenger Preserved R-600 engine Type Radial engine Manufacturer Curtiss Aeroplane and Motor Company First run 1920s

The **Curtiss R-600 Challenger** was a six-cylinder, double-row, air-cooled, radial engine for aircraft use built in the United States in the late 1920s. It developed 170 to 180 horsepower (127 to 134 kW).

## Design and development

Curtiss started work on a small six-cylinder engine in May 1927.[1] The engine was unusual in its design with aluminium cylinders mounted at 60°, so that it was in effect two staggered three cylinder engines.[2] The engine was first run in December 1927, and was taken to market producing between 170 and 180 horsepower (127 and 134 kW) at 1,800 rpm.[1]

## Applications

- [ANBO VI](/source/ANBO_VI)

- [Consolidated XPT-5](/source/Consolidated_XPT-5)

- [Curtiss Robin](/source/Curtiss_Robin)

- [Curtiss-Wright CW-14C Travel Air](/source/Curtiss-Wright_CW-14_Osprey)

- [Hodkinson HT-1](/source/Hodkinson_HT-1)

- [Rearwin 2000](/source/Rearwin_2000)

## Specifications (R-600)

*Data from* *Nutt, 1928 p.842*[3]

### General characteristics

- **Type:** Six-cylinder, double-row, radial engine

- **[Bore](/source/Bore_(engine)):** 5.125 in (130.2 mm)

- **[Stroke](/source/Stroke_(engine)):** 4.875 in (123.8 mm)

- **[Displacement](/source/Engine_displacement):** 603.4 cu in (9.89 L)

- **Diameter:** 42.625 in (1082.7 mm)

- **[Dry weight](/source/Dry_weight):** 420lb (190.5 kg)

### Components

- **Cooling system:** Air-cooled

### Performance

- **Power output:** 170 hp (127 kW) at 1,800 rpm

## See also

**Comparable engines**

- [Bristol Jupiter](/source/Bristol_Jupiter)

- [Continental R-670](/source/Continental_R-670)

- [Pratt & Whitney R-985 Wasp Junior](/source/Pratt_%26_Whitney_R-985_Wasp_Junior)

**Related lists**

- [List of aircraft engines](/source/List_of_aircraft_engines)

## References

### Citations

1. ^ [***a***](#cite_ref-FOOTNOTENutt1928840_1-0) [***b***](#cite_ref-FOOTNOTENutt1928840_1-1) [Nutt 1928](#CITEREFNutt1928), p. 840.

1. **[^](#cite_ref-FOOTNOTENutt1928809_2-0)** [Nutt 1928](#CITEREFNutt1928), p. 809.

1. **[^](#cite_ref-FOOTNOTENutt1928842_3-0)** [Nutt 1928](#CITEREFNutt1928), p. 842.

## Bibliography

Wikimedia Commons has media related to [Curtiss R-600](https://commons.wikimedia.org/wiki/Category:Curtiss_R-600).

- Nutt, Arthur (8 September 1928). "The Curtiss "Challenger"". *Aviation*: 808–842.

- [USAF museum](https://web.archive.org/web/20130330024612/http://www.nationalmuseum.af.mil/factsheets/factsheet.asp?id=824)

v t e Curtiss aircraft engines Inline engines A-2 B-8 C-6 D-12 K-12 K L O OX-5 OXX S V V-1570 V-2 Radial engines H-1640 R-600 R-1454

v t e United States military piston aircraft engine designation system H (four-bank H-configuration inline) H-1640 XH-2240 XH-2470 XH-2600 XH-3130 XH-3730 H-4070 IV (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-1740 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 R-7755 V (upright-V inline) V-720 V-1150 V-1237 V-1400 V-1440 V-1460 V-1510 V-1560 V-1570 V-1650 (P) V-1710 V-1950 V-3420 V (inverted-V inline) V-770 V-1650 (L) VG (inverted-V inline) VG-1410 W (three-bank W-configuration inline) W-2779 See also: X-1800 US military gas turbine aeroengines Piston engine configurations

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