Piasecki CH-21C Shawnee
Overview
Data on design, manufacture and statusDesign authority: Piasecki Helicopter Corporation
Primary manufacturer: Piasecki Helicopter Corporation
Parent type: Piasecki H-21
Aircraft status: No longer flying
Configuration
Primary flight and mechanical characteristicsVTOL type: Helicopter
Lift configuration: Tandem (Fore/aft) (x2)
Crew required: 2
Crew seating: Side-by-side
Landing gear: Wheels (non-retractable)
Layout and Dimensions
Data on aircraft size| Overall Dimensions | ||
|---|---|---|
| Overall Height: | 4.69 m | 15.4 ft |
| Overall Length: | 26.31 m | 86.3 ft |
| Overall Width: | 13.41 m | 44.0 ft |
| Airframe Dimensions | ||
|---|---|---|
| Airframe Length: | 16.02 m | 52.6 ft |
| Airframe Width: | 3.97 m | 13.0 ft |
| Airframe Height: | ||
| Landing Gear Dimensions | ||
|---|---|---|
| Landing Gear Base: | 7.51 m | 24.6 ft |
| Landing Gear Track: | 4.38 m | 14.4 ft |
| Cabin Dimensions | ||
|---|---|---|
| Cabin Internal Height: | 1.78 m | 5.8 ft |
| Cabin Internal Length: | 6.10 m | 20.0 ft |
| Cabin Internal Width: | 1.73 m | 5.7 ft |
Weights and Performance
Data on aircraft weight and flight characteristics| Weights | ||
|---|---|---|
| Max Gross Weight (ground): | 5,670 kg | 12,500 lb |
| Max Gross Weight (airborne): | ||
| Max Take-off Weight: | 5,670 kg | 12,500 lb |
| Empty Weight: | 3,960 kg | 8,730 lb |
| Useful Load: | 1,710 kg | 3,770 lb |
| Empty Weight Fraction: | 0.698 | |
| Climb Performance | ||
|---|---|---|
| Max Rate of Climb: | ||
| Hover Performance | ||
|---|---|---|
| Hover Ceiling IGE: | ||
| Hover Ceiling OGE: | ||
| Limitations | ||
|---|---|---|
| Max Level Flight Speed: | ||
| Never Exceed Speed: | ||
| Service Ceiling: | ||
| Range and Endurance | ||
|---|---|---|
| Max Range: | ||
| Max Endurance: | ||
Engine Details
Aircraft powerplant (lift and/or propulsion)Provided powerplant data is for uninstalled, sea level, static operations.
| Powerplant | ||
|---|---|---|
| Number of engines: | 1 | |
| Designation: | Wright R-1820-103 reciprocating | |
| Manufacturer: | Wright Aeronautical Division, Curtiss-Wright Corporation | |
| Normal Ratings | ||
|---|---|---|
| Max continuous: | 951 kW | 1275 hp |
| Take-off / rated: | 1063 kW | 1425 hp |
| Intermediate: | ||
| Maximum: | ||
| OEI Ratings | ||
|---|---|---|
| OEI contingency: | ||
| OEI continuous: | ||
| OEI 30-second: | ||
| OEI intermediate: | ||
Primary Lift Device
Data on primary lift devices such as main rotorsFwd rotor rotates ant-clockwise, aft rotor rotates clockwise
| Main Rotor Characteristics | ||
|---|---|---|
| Diameter: | 13.41 m | 44.00 ft |
| RPM: | 255.0 rpm | 255.0 rpm |
| Direction of Rotation: | Counter-rotating | |
| Hub Type: | Fully articulated | |
| Main Rotor Blade Characteristics | ||
|---|---|---|
| Blade Construction: | Metal with D section steel spar | |
| Blade Chord: | 0.419 m | 1.38 ft |
| Blade Tip Geometry: | Conventional | |
| Blade Twist: | -0.081 rad | -4.617 deg |
| Number of Blades: | 3 | |
| Main Rotor Derived Characteristics | ||
|---|---|---|
| Disc Area: | 141.26 m² | 1520.6 ft² |
| Disc Loading: | 20.07 kg/m² | 4.110 lb/ft² |
| Solidity: | 0.0597 | |
| Main Rotor Blade Derived Characteristics | ||
|---|---|---|
| Blade area per blade: | 2.81 m² | 30.3 ft² |
| Tip Speed: | 179.06 m/s | 587.5 fps |
Primary Control Device
Data on primary control devices such as tail rotors| Tail Rotor Characteristics | ||
|---|---|---|
| Diameter: | ||
| Configuration: | Unknown | |
| Direction of Rotation: | Unknown | |
| RPM: | ||
| Tail Rotor Blade Characteristics | ||
|---|---|---|
| Number of Blades: | ||
| Blade Construction: | N/A | |
| Blade Chord: | ||
| Blade Twist: | ||
| Tail Rotor Derived Characteristics | ||
|---|---|---|
| Disc Area: | ||
| Solidity: | ||
| Tail Rotor Blade Derived Characteristics | ||
|---|---|---|
| Tip Speed: | ||
| Blade Area (per blade): | ||
Related VFS Resources
Resources related to the CH-21C Shawnee, provided by the Vertical Flight Society.Forum Proceedings
Vertiflite articles
Enter a search term in the box above.
Web files from vtol.org
Enter a search term in the box above.
Webpages from vtol.org
Enter a search term in the box above.
Related Public Resources
Resources related to the CH-21C Shawnee, provided by public sources across the internet.Publicly-funded resources provided by the US Government
Enter a search term in the box above.
Enter a search term in the box above.
Enter a search term in the box above.
Enter a search term in the box above.
Enter a search term in the box above.
Public resources provided by select scholarly and academic sources
Enter a search term in the box above.
Enter a search term in the box above.
Enter a search term in the box above.
Enter a search term in the box above.
