OH-6A Cayusa

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Manufacturer: Hughes, McDonnell Douglas (now Boeing)
Designation: OH-6A/HO-6
Version: A
Nickname: Cayuse, "Loach",  Defender
Type: Light Observation Helicopter (L-O-H, or "loach")
First Flew: 1963
Length: 30 ft 10 in 9.4 M
Height: 8 ft 1.5 in  
Rotor Span: 26 ft 4 in 8.03 m
Empty Weight: 1,229 lb Kg
Cargo Gross Weight: 1000 lbs Kg
Max Weight: 2,700 lb Kg
No. of Engines: 1
Powerplant: Allison T63-5A turboshaft
Horsepower (each): 252.5 shp
Range: 265 miles (380?) 428 Km
Cruise Speed: mph Km/H Kt
Max Speed: 150 Mph Km/H 119 Kt
Climb: Ft/min  
Ceiling: Ft  

The Hughes OH-6A was designed for use as a military scout during the Vietnam war
to meet the U.S. Army's need for an extremely maneuverable light observation
helicopter (LOH program). Initially fielded in Vietnam in early 1968, the Hughes
OH-6A was used for command and control, observation, target acquisition, and
reconnaissance. The Cayuse was organic to division, brigade, and battalion size
units. The four-passenger teardrop shaped "Flying egg" (six-passenger with rear
seats folded-down) was a small, light, sturdy, a maneuverable helicopter, with
very low drag.

The OH-6A Cayuse was quite effective when teamed with the AH-1G Cobra attack
helicopter as part of what were known as "Pink Teams". The OH-6A "Loach" (for
"LOH") would find targets by flying low, "trolling for fire", then marking the
target with colored smoke to lead in a Cobra, or "Snake", to attack. The Cayuse
could absorb an extensive amount of small arms fire and still bring the crew
home safely. The OH-6A could be armed with the M27 armament subsystem, the port
(left) side mounting M134 six-barrel 7.62mm "Minigun" or a 40mm grenade launcher
on the XM8 armament subsystem. In addition, an M60D 7.62mm machine gun could be
mounted in the rear starboard (right) door opening. The OH-6A replaced the
Korean era OH-13 Sioux and OH-23 Raven light observation helicopters. The Hughes
(model 500M) international military version was sold in ten countries and built
under license in Italy and Japan. The Cayuse had a single articulated
four-bladed main rotor and a metal two-bladed tail rotor. The OH-6A was powered
by a single Allison T63-A-5A 285 shp turboshaft engine, and had a cruising speed
of 144 mph (125 knots).

Two special operations versions of the OH-6A are the Hughes (model 500C) AH-6
"Little Bird" armed variant, and the MH-6 transport/utility version. These
advanced versions feature a quieter five-bladed main rotor, minimal-cavitation
tail rotor, and a distinctive T-shaped tail.

This photo of 68-17252 was taken in 1970.  The photo was provided by Bill Haney, who flew our helicopter in Cambodia. This OH-6A helicopter serial number 68-17252, was built by Hughes and
delivered to the US Army in Oct 1969 to the 25th Infantry, Vietnam. In 1971 it was assigned to the 1st of the 9th Cav "C" Charlie troop, Vietnam. It returned stateside later in 1971 after accumulating approx 1,340 combat hours. During this time it was shot down 4 times and had 2 non-combat accidents. It was repaired and as of 1988 was still flying in the New York Army Guard. It was donated to the museum on 5 March 2001 by the Riverside County Sheriffs Dept.
(along with two other OH-6's, S/N 68-17331 and S/N 69-15971) This historical helicopter is rare and is a proud addition to the museum's collection. It 's restoration (non flying) was completed in 2004.  It is in the colors of the 1st/9th/C, the last unit to fly her in combat.  For more
information on air cavalry, click here to link to Charlie Troop, 1st Squadron, 9th Air Cavalry, or, click here to link to Bravo Troop, 1st Squadron, 9th Air Cavalry. This little bird was also a member of the Silver Eagles Demonstration Team! It's assignment in 1973 after Vietnam was to the USAAPDT (U.S. Army Aviation Performance Demonstration Team), Ft Rucker.