The Army bought this tiltrotor aircraft over 30 years before the Osprey flew

When the military adopted the V-22 tiltrotor aircraft in 2007, there were legions of naysayers who thought the military’s first tiltrotor was too unsafe and too expensive to be added to the fleet.

But while the V-22 did have a spotted history during development, it wasn’t the first military tiltrotor aircraft. A few such aircraft were in the early stages of development during World War II, and the U.S. Army bought a tiltrotor aircraft in 1956 — over 30 years before the first V-22 flew in 1989.

Video: YouTube/AIRBOYD

The Doak Model 16 was a vertical take-off and landing aircraft that used ducted tilt-rotors to generate forward thrust and — in the vertical flight mode — lift. Like the V-22, the Model 16 only rotated its rotors when transitioning between flight modes.

The Doak company spent years developing VTOL technologies before it sold a single Model 16 to the Army for further testing and development. For its part, the Army dubbed the Model 16 the VZ-4 and flew it for three years, evaluating its flight characteristics and the potential for full production and deployment.

Cobbled together with parts from other planes and using still experimental tiltrotor technologies, the VZ-4 had fairly impressive stats. It was capable of flying at 229 mph and had a 229-mile range.

us-army-doak-model-16-experimental-tiltrotor

The Doak VZ-4 hovers during flight testing. (Photo: U.S. Army)

But, the plane struggled with some “undesirable characteristics,” especially during the transitions between vertical and horizontal flight. The most problematic was a tendency for the nose of the aircraft to rise in relation to the tail during the switch between flight modes.

Ultimately, the Army passed on purchasing more of the planes and loaned its single Model 16 to NASA for continued tests. When NASA was finished with it, the aircraft was sent to the Army Transportation Museum at Fort Eustis, Virginia.

Nowadays, the performance of the CV-22 and MV-22 Osprey has left little doubt that there’s a place in the military inventory for tiltrotor aircraft. The Ospreys can fly from patches of dirt or relatively small ships at sea that traditional planes could never operate from. And they can fly for over 1,000 miles without refueling, over twice the range of the CH-47 Chinook helicopter.

These traits have earned the Ospreys spots in special operations units and Marine air-ground task forces around the world. And for the U.S. military, the road to tiltrotor aircraft all started with a single plane purchased in 1956.

TOP ARTICLES
SpaceX launching a third top-secret satellite

SpaceX is launching a secretive mission this month. The mission, shrouded in secrecy, has some considering it may be for the CIA or the NSA.

This is how the Air Force will use prop planes on high-tech battlefields

The Air Force is looking toward a light-attack aircraft program, known as OA-X, to produce a plane that meets its needs and gets the job done.

A retired SEAL commander on how to stop thinking and 'get after it' every day

This former Navy commander has some excellent advice on how to jump start your day, and "get some" in order to make it as productive as possible.

Marines return to battle in 'old stomping grounds'

The Marines recall their "old stomping grounds" as they return to Fallujah and the surround areas of Al Anbar Province to battle a new enemy.

How Chinese drones are set to swarm the global market

China has stepped up it's drone game, and even though United States technology can still compete, China's drones are kind of really in demand.

That time two countries' Special Forces squared off in combat

In an area the size of the Falkland Islands, British and Argentine special operators were bound to run into each other at some point – a lot.

5 times pilots got in trouble for having fun in the sky

When pilots decide to do some fancy flying in their high-performance fighters, it can land them in trouble once they're back on the ground.

This is why Nazis dubbed these paratroopers 'devils in baggy pants'

"American paratroopers – devils in baggy pants – are less than 100 meters from my outpost line. I can’t sleep at night," wrote one German commander.

9 ISIS weapon fails that you have to see to believe

Many bad guys just want record themselves laying rounds down range for social media purposes — and we're glad they did. Laugh away, America!

US Army recruitment campaigns, ranked from worst to best

Advertising can really impact recruitment for the military. For better or for worse, here are some of the Army's most memorable slogans...