# Righter O-45

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Aircraft engine

"O-45" redirects here. For the observation aircraft, see [Martin B-10](/source/Martin_B-10).

O-45 Radioplane OQ-14 powered by a Righter O-45. National Museum of the United States Air Force. Type Flat-twin Manufacturer Righter Manufacturing Company Major applications Globe KD3G

The **Righter/Kiekhaefer O-45** was an air-cooled, [two-stroke](/source/Two-stroke_engine) aircraft engine of [flat-twin](/source/Flat_twin_engine) configuration, used extensively for powering [target drones](/source/Target_drone) in the late 1940s.[1]

Designed by the [Righter Manufacturing Company](https://en.wikipedia.org/w/index.php?title=Righter_Manufacturing_Company&action=edit&redlink=1), the O-45 was also built by the [Kiekhaefer Corporation](/source/Carl_Kiekhaefer) and the [Menasco Motors Company](/source/Menasco_Motors_Company).[2]

## Variants

**O-45-1**
- 20 horsepower (15 kW) version

**O-45-3**
- 35 horsepower (26 kW) version

**O-45-35**
- Navy version of O-45-3

## Applications

- [Beecraft Wee Bee](/source/Beecraft_Wee_Bee)

- [Frankfort OQ-16](/source/Frankfort_OQ-16)/[TD3D](/source/Frankfort_TD3D)

- [Globe KD3G Snipe](/source/Globe_KD3G_Snipe)

- [Globe KD4G Quail](/source/Globe_KD4G_Quail)

- [O'Neill Pea Pod](/source/O'Neill_Pea_Pod)

- [OQ-15](/source/OQ-15)

- [Radioplane OQ-6](/source/Radioplane_OQ-6)

- [Radioplane OQ-14](/source/Radioplane_OQ-14)

- [Radioplane OQ-17](/source/Radioplane_OQ-17)/[KDR](/source/Radioplane_KDR)

- [Radioplane TDD](https://en.wikipedia.org/w/index.php?title=Radioplane_TDD&action=edit&redlink=1)

- [ULM 811 Ultra Cruiser Ultavia](https://en.wikipedia.org/w/index.php?title=ULM_811_Ultra_Cruiser_Ultavia&action=edit&redlink=1)

## Specifications (O-45-1)

*Data from* [2]

### General characteristics

- **Type:** 2-cylinder air-cooled [horizontally opposed](/source/Flat_twin_engine) direct drive naturally aspirated two-stroke aircraft piston engine

- **[Bore](/source/Bore_(engine)):** 3.25 in (82.6 mm)

- **[Stroke](/source/Stroke_(engine)):** 2.75 in (69.9 mm)

- **[Displacement](/source/Engine_displacement):** 45.5 cu in (745.6 cc)

- **[Dry weight](/source/Dry_weight):** 34 lb (15.4 kg)

### Components

- **Fuel type:** 73 [octane](/source/Octane) gasoline

- **Cooling system:** Air-cooled

### Performance

- **Power output:**

- (Normal): 20 hp (14.9 kW) at 3,800 rpm at sea level

## See also

**Related lists**

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

## References

1. **[^](#cite_ref-1)** [Kiekhaefer O-45-1](http://www.neam.org/aircraft_inventory/engprofile.php?ID=242). New England Air Museum. Accessed 2013-02-12.

1. ^ [***a***](#cite_ref-USAF_2-0) [***b***](#cite_ref-USAF_2-1) *[Model Designations of USAF Aircraft Engines](http://www.enginehistory.org/ModDesig/I%201.tif)*. Air Force-WPAFB-O-6. USAF Air Materiel Command, 1950. Section I., Page 1.

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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Adapted from the Wikipedia article [Righter O-45](https://en.wikipedia.org/wiki/Righter_O-45) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Righter_O-45?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.