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Information About

Ch-21 Shawnee




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CH-21B at the National Museum Of The United States Air Force ]]
in 1962 ]]
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The H-21 Shawnee was the fourth of a line of Tandem Rotor helicopters designed and built by Piasecki (later Boeing Vertol ). Commonly called the "flying banana", it was a multi-mission helicopter, utilizing wheels, skis, or floats. It was used for Arctic rescue because it performed so well at low temperatures. The CH-21 served with the United States Army from 1949 to 1964 , and also with the U.S. Air Force (as the '''H-21 Workhorse'''), the French Navy , the Royal Canadian Air Force and the West German Air Force . The French used an armed version of the CH-21 in Algeria , mounting guns in the door ways and on the skids.

The CH-21B assault helicopter could carry 22 fully-equipped troops, or 12 stretchers, plus space for two medical attendants, in the MedEvac role. The CH-21B was first deployed to Vietnam in December 1961 with the Army's 8th and 57th Transportation Companies, in support of ARVN (Army Vietnam) troops. The CH-21B/CH-21C Shawnee could be armed with 7.62 mm (.308 in) or 12.7 mm (.50 in) door guns. The CH-21 was relatively slow. Its cables and fuel lines were so vulnerable to small arms fire it was even rumored that a CH-21 had been downed by a Viet Cong spear. The Shawnee was the "Workhorse" of Vietnam until it was replaced with the fielding of the UH-1 Huey , and the later fielding of the CH-47 Chinook in the mid-1960s. The Shawnee had two tandem fully-articulated three-bladed counter-rotating rotors. The CH-21 was powered by one Curtis-Wright R1820-103 Cyclone supercharged 1150 hp Piston Engine . The CH-21B was equipped with an uprated 1425 shaft Horsepower (1063 kW) engine.
The CH-21 had a top speed of 128 mph (111 knots).


SPECIFICATIONS (CH-21C)

  plane Or Copter copter
  jet Or Prop prop
  crew Two
  capacity 22 troops or 12 stretchers
  length Main 52 ft 6 in
  length Alt 1600 m
  span Main 2x 44 ft 0 in
  span Alt 1340 m
  height Main 15 ft 9 in
  height Alt 480 m
  area Main 3,041 ft&2
  area Alt 2827 m&2
  empty Weight Main 8,950 lb
  empty Weight Alt 4,058 kg
  loaded Weight Main 15,200 lb
  loaded Weight Alt 6,893 kg
  max Takeoff Weight Main lb
  max Takeoff Weight Alt kg
  engine (prop) Wright R-1820 -103
  type Of Prop Radial Engine
  number Of Props 1
  power Main 1,425 hp
  power Alt 1,063 kW
  max Speed Main 127 mph
  max Speed Alt 204 km/h
  range Main 265 miles
  range Alt 426 km
  ceiling Main 9,450 ft
  ceiling Alt 2,880 m
  climb Rate Main ft/min
  climb Rate Alt m/s
  loading Main 5 lb/ft&2
  loading Alt 24 kg/m&2
  power/mass Main 009 hp/lb
  power/mass Alt 150 W/kg




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