Little-known American Rotary Wing Prototypes & Projects

[hesham]

From JAWA 1985,

here is a little known helicopter designed by Mr. Richard R. Degraw.

Another picture

 

[hesham]

From Aviation magazine 1965,

the Wigal autogiro.

From JAWA 1965-1966

 

[hesham]

Cobra Helicopter,not from Bell,

https://web.archive.org/web/2010082...elicopters/cobra-helicopters/helicopter-1.php

 

[hesham]

From the site of my dear Stingray,

I don't know if this is American design or not ?,McK Aviation MK90,

The MK90 is the answer to cities congested congested by road traffic, to the need to be present in several places in a short period of time, to the desire to be in Capri for lunch.
It carries you and a companion rapidly and in comfort from where you are to where you want to go.
Enjoy flying in the superbly appointed interior of the MK90.
The MK90 is compact, facilitating take-off and landing in small places.
·The MK90 has excellent visibility and ample space, while maximizing aerodynamics.
·The MK90’s clean lines and push propeller enable a cruising speed of over 200km/h for nearly four hours.
·The MK90 combines push propeller with turbine effect to enable long hovering, even in hot weather.
·Co-axial rotors, single engine, 135hp
·Dual tandem seats.
·Small rotor diameter, while providing maximum lift and stability.
·The MK90 is a brilliant technical solution between an ultralight and a larger helicopter.

 

[hesham]

In the site of my dear Stingray,

From Walter:

2-seat light helicopter

one 360hp rotary engine (280hp Mazda 13-B?) driving a compressor
280hp: max. speed 90mph, cruise 70mph, ceiling 10,000ft, endurance 4 hours
rotor diameter 35.991ft; length 18.012ft; height 8ft

DETAILS: The Air Jet was a further development of the Eagle helicopter (qv) of Eagle Helicopter Corporation and American Air Jet. Inc was formed to continue development. It was a design of a team comprising Messrs. Stephen Willman, Russell Pitts, Michael Diekman, Raymond Berry. The Air Jet used the cold-cycle-pressure-jet principle (air from a compressor driven by the engine was channelled to exhaust nozzles at the tips of the rotor blades) and a prototype aircraft was completed in 1987 or 1988 and shown at the 1988 Sun-‘n Fun convention. Possibly only this prototype was built and it was maybe not flight tested, although first flights were also reported as having taken place in July 1988. The engine in the prototype was one 280hp rotary engine (360hp Mazda 13-B?).

Production: 1

American Air Jet, Inc. 710 Sunnywood Pl. Woodland Park, CO 80863

 

[hesham]

The ADI Hollmann Bumble Bee Gyrocopter,

https://www.buildagyrocopter.com/story-bumble-bee-gyrocopter/

 

[hesham]

From the site of my dear Stingray,

Beaty Model 1,

Single-seat helicopter, one 30hp Kohler modified snowmobile two-stroke engine, main rotor diameter 22ft. DETAILS: Mr. Chuck Beaty designed and built this light homebuilt helicopter strictly for testing purposes and his personal use. The Model 1 made the first flight early-1976. The type was not intended for amateur construction and the aircraft was powered by one 30hp modified Kohler snowmobile two-stroke engine. The main rotor was manufactured from a (cut down) Hughes 500 (OH-6A) rotor.

 

[hesham]

The Kadet KT-112,

https://defence-blog.com/ukraine-unveils-new-kt-112-light-attack-helicopter-concept-at-idex-2017/

 

[Stingray]

From the site of my dear Stingray,

I don't know if this is American design or not ?,McK Aviation MK90,

The MK90 is the answer to cities congested congested by road traffic, to the need to be present in several places in a short period of time, to the desire to be in Capri for lunch.

The flag on the front and mention of Capri suggests it's Italian. ;3

 

[overscan (PaulMM)]

From the site of my dear Stingray,

I don't know if this is American design or not ?,McK Aviation MK90,

If you don't know if its American or not, how about you don't post it in a topic called Little-known American Rotary Wing Prototypes & Projects?

I can't believe I just had to say that. Sheesh.

As Stingray says, it's extremely unlikely US consumers will be travelling to Capri by helicopter. There's only one town of that name in the whole US (Chautauqua County, New York) with only 2068 residents.

 

[hesham]

Oh sorry,we can transfer it to this topic,

https://www.secretprojects.co.uk/th...opters-prototypes-projects.31568/#post-900985

 

[Coiler]

The Kadet KT-112,

That's pretty obviously Ukrainian.

 

[hesham]

Doyle Mini-Giro

it was a small gyrocopter was designed by Mr. Richard Doyle and built during the 1960-1962 period. The design was only briefly tested and was soon dismantled and parts were then used in Mr. Doyle's "Moonmaid" single-seat light plane.

Stingray's site

https://www.aerofiles.com/_d.html

 

[hesham]

Hi,

the Grudieaire GH-4 was a single seat autogyro.

https://grokipedia.com/page/grudieaire_gh_4

 

[hesham]

No, I mean, isn't using AI as a source supposed to be forbidden?

Frankly,I don't know my dear.

From JAWA 1960-1961, the Hill-Kemman HK-1 helicopter.

 

[hesham]

The Hunt Helicopter Corporation HS-180 Hunter,

was a trim, two-place, light-utility helicopter with sturdy composite cabin, welded tubular fuselage, and a 180hp Lycoming IVO-360-A1A engine with multiple V-belt main rotor drive. Direct operating cost projected at less than $25 per hour. Cruising airspeed 80mph.

From the site of my dear Stingray

https://www.ebay.com/itm/302292543442

 

[hesham]

Jag Helicopter Group,

https://www.aviastar.org/helicopters_eng/jag.php

 

[hesham]

Hi,

who heard about Gabor Kovacs Behemoth helicopter ?.

 

[hesham]

The Hillman Busy Bee helicopter,

https://www.redbackaviation.com/hillman-hornet-turbo-charged-helicopter/

 

[hesham]

The Hillman Busy Bee helicopter,

https://www.redbackaviation.com/hillman-hornet-turbo-charged-helicopter/

Also Hillman Green Hornet helicopter.

https://www.redbackaviation.com/green-hornet-hillman-hornet-helicopter/

 

[Stingray]

Hi,

who heard about Gabor Kovacs Behemoth helicopter ?.

I used to be online friends with him a long time ago. Helicopter CFI from Port Orange, FL.

The Behemoth was an autogyro he built specially for his large stature.

 

[persil]

The Hunt Helicopter Corporation HS-180 Hunter,

was a trim, two-place, light-utility helicopter with sturdy composite cabin, welded tubular fuselage, and a 180hp Lycoming IVO-360-A1A engine with multiple V-belt main rotor drive. Direct operating cost projected at less than $25 per hour. Cruising airspeed 80mph.

From the site of my dear Stingray

https://www.ebay.com/itm/302292543442

Dear Hesham, great find!

It looks like a continuation of a Scheutzow Bee project:
https://rotorcraft.info/fe/acft/480

 

[persil]

It looks like a continuation of a Scheutzow Bee project

An article from Rotor&Wing (August 1977) confirms that. Even original designer - Webb Scheutzow landed as a member of board of directors in Hunt Helicopters.

Summary and links to available sources:
https://rotorcraft.info/fe/acft/1611

 

[hesham]

The Little Wing Autogyros, Inc. designed LW-1,LW-2,LW-3,
LW-4,LW-5 & Roto-Pup.

https://en.wikipedia.org/wiki/Little_Wing_Autogyros,_Inc.

From JAWA 1998/99,

 

[hesham]

Hi,

the Hartwig-Little Co. designed a tandem two rotor heliplane,maybe remained a project only.

http://archive.aviationweek.com/image/spread/19441023/12/2

The page.

 

[hesham]

From AW 1945.