Boeing Vertol YUH-61

infobox Aircraft
name = YUH-61
type = Utility transport helicopter
manufacturer = Boeing Vertol



caption = Boeing Vertol YUH-61A
designer =
first flight =
introduced =
retired =
status = Program terminated
primary user =
more users =
produced =
number built = 3
unit cost =
developed from =
variants with their own articles =

The Boeing Vertol YUH-61 ("Model 179"), a twin turbine-engined, medium-lift, military assault/utility helicopter was the runner-up of a United States Army competition in the mid 1970s to replace the Bell UH-1 "Huey" family. Though the two final competing designs were both developed to Army specifications, Sikorsky's aircraft was selected.

History

Under a contract awarded in August 1972, Boeing Vertol designed and delivered three prototypes to compete against the Sikorsky YUH-60A in the US Army's Utility Tactical Transport Aircraft System (UTTAS) program.Gunston, Bill: "The Illustrated Encyclopedia of the World's Modern Military Aircraft", page 205. Crescent Books, New York, NY USA, ca. 1978. ISBN 978-0-517-22477-9] While Boeing Vertol failed to win the competition, it pinned its hope on winning civil orders and the US Navy's LAMPS III program. In the end, a variant of the Sikorsky design, the SH-60B, would also win, and what civil orders that were received were canceled. Three aircraft were built and a further two were cancelled and not completed.

Variants

* Model 237 - naval version of the YUH-61 for the USN's LAMPS II competition (ship-based multi-purpose helicopter) and lost out to Sikorsky H-60; no models built

* Model 179 civilian - 14-20 passenger utility helicopter later cancelled; 1 model built

urvivors

Two of the three aircraft (73-21656 and 73-21658) built are preserved at the United States Army Aviation Museum in Fort Rucker, AL.

pecifications (YUH-61A)

aircraft specifications

plane or copter?=copter
jet or prop?=prop

ref="Modern Military Aircraft"
crew=Minimum 2 pilots
capacity=
length main=60 ft 8.5 in
length alt=18.5 m
span main=49 ft 0 in
span alt=14.94 m
height main=15 ft 6 in
height alt=4.72 m
area main= ft²
area alt= m²
empty weight main=9,750 lb
empty weight alt=4,422 kg
loaded weight main= lb
loaded weight alt= kg
max takeoff weight main=17,700 lb
max takeoff weight alt=8,953 kg

engine (prop)=General Electric T700
type of prop=turboshafts
number of props=2
power main=1,536 hp
power alt= kW

max speed main= mph
max speed alt= knots, km/h
combat radius main=370 mi
combat radius alt= nm, 595 km
ferry range main= mi
ferry range alt= nm, km
ceiling main= ft
ceiling alt= m
climb rate main= ft/min
climb rate alt= m/s
loading main= lb/ft²
loading alt= kg/m²
power/mass main= hp/lb
power/mass alt= W/kg

armament=

References

External links

* [http://www.helis.com/programs/uttas.php UTTAS program] - YUH-61 origins

ee also

aircontent
related=

similar aircraft=
* Sikorsky S-70
* Sikorsky UH-60 Black Hawk
* Sikorsky SH-60 Seahawk

sequence=

lists=
* List of helicopters

see also=
* US Helicopter Armament Subsystems