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Description
| Manufacturer: | Doak | |
| Base model: | VZ-4 | |
| Designation: | VZ-4 | |
| Designation System: | U.S. Air Force | |
| Designation Period: | 1956-1962 | |
| Basic role: | VTOL Research | |
Specifications
| Not Yet Available |
Known serial numbers
Examples of this type may be found at
| Museum | City | State |
| United States Army Transportation Museum | Fort Eustis | Virginia |
VZ-4 on display
United States Army Transportation Museum |
Recent comments by our visitors
| John Ulyate Yorba Linda, CA | Dave Henry:
Contact me at exdoak@aol.com 07/14/2011 @ 08:24 [ref: 40850] |
| Dave Henry , CA | I am designing a small tilt duct VTOL aircraft and could use help from any of the original designers or current enthusiasts who could send me any useful design information on the Doak VZ-4. Helpful information includes the inlet vane system, duct tilt design, ancillary hover stability augmentation, detailed flight characteristics, duct fan design, etc. Thank you! 06/19/2011 @ 17:43 [ref: 39666] |
| don scimonelli washington, DC | I have some information. one of the reasons I built south capitol street heliport was for the doak and we await its arrival. two more items are needed to completes the vz4 mission, first attachment of the personal injury emergency triage apparatus second and most important today’s advancements in aviation technology,
. 02/14/2009 @ 07:55 [ref: 23720] |
| Ronald W. Sparks, PE Wilmington, NC | How would I aquire the Plans, Specifications and Test reports on this Aircraft (Doak Vz-4)?
Thanks 04/22/2004 @ 21:09 [ref: 7267] |
| Mark G Brislawn Orange, CA | Doak Aircraft Company obtained a contract to build the VZ4DA
(the Doak 16) in the summer of 1956. The engineering staff peaked at around a dozen engineers in '57 or '58. I worked at Doak from Dec 1956 thru Oct 1960. My early work included component design such as the pitch and yaw vanes in the exhaust gas (for hover control), layout of the pilot's instrument panel, molds to make the fiberglass propellers & inlet guide vanes, and then design of the flight test instru- mentation system. During flight test at Edwards AFB I was responsible for gathering the flight test data. After a Summary Report was written, primarily by Ray Ulyate, work shifted to newer versions of the twin-duct aircraft. A re- cession in aerospace in '59 or '60 however, especially in subcontracts to small firms, eliminated over 90% of the company employees causing Mr Doak to close the company down in Nov or Dec of 1960. Douglas Aircraft Co. thought highly of the ducted propeller concept, saw a flight test demonstration, and as a result bought up the engineering files and patent rights to the aircraft. Four of us moved on to the El Segundo Division of Douglas Aicraft where we helped in writing an unsolicited proposal to the U.S.Army to improve the VZ4DA but by this time the army had apparently decided to concentrate on helicopters. 06/23/2001 @ 18:01 [ref: 2513] |
| John R.(Ray) Ulyate Placentia, CA | I worked on the design of the Doak VZ-4DA (Doak Model 16)
(1957-1958) and supervised flight tests of the aircraft at Edwards (1958-1960). First conversion from horizontal flight to vertical flight (and vice-versa) was accomplished on May 5th, 1959. Following completion of our 50 hour flight test program the aircraft was delivered to NASA (Langley,VA) for further testing. The airplane is currently located at the U.S.Army Transportation Museum, Ft.Eustis, VA 05/23/2000 @ 14:26 [ref: 229] |
Recent photos uploaded by our visitors
