• Hi Guest! Forum rules have been updated. All users please read here.

Douglas Ground Effect Machines ?

Skybolt

ACCESS: Top Secret
Senior Member
Joined
Jun 14, 2006
Messages
2,301
Reaction score
126
There is an extensive article on the flying maquette on the concept in the Spring 2007 number of the AAHS Journal. Somewhere I have an art of a much scaled up version (one thousand passengers) version form 1964. The patents was based on the ideas of Weiland, who was a Swiss engineer. If you search Google, you'll find a couple of other patents from him and from him and Douglas.
 

Stargazer2006

ACCESS: USAP
Senior Member
Joined
Jun 25, 2009
Messages
13,235
Reaction score
454
From Progress in Aerospace Sciences #42 by K. V. Rozhdestvensky:

Quite a unique craft was developed in the 60s by the Swiss engineer Weiland within his contract with the US company "West Coast". Weiland vehicles comprise a twin-hull structure with two large wings of aspect ratio 5 configured in a tandem. The "Small Weilandcraft" of 4.3 tons was to be followed by a 1000-ton "Large Weilandcraft" with length in excess of 200m and width of more than 150m. Sufficient attention was attached to providing efficient takeoff.

As an alternative to hydroskis, Weiland proposed power augmentation. He also introduced special inflatable shells on the bottoms of the hulls to reduce the impact of waves during takeoff. The "Small Weilandcraft" crashed during the tests supposedly due to lack of static stability.

Attached are a photograph of the small Douglas-Weiland demonstrator and an artist's rendering of Weiland's projected "Large Weilandcraft" development.
 

Attachments

  • doug-weiland.jpg
    doug-weiland.jpg
    67.1 KB · Views: 176
  • Weilandcraft1.jpg
    Weilandcraft1.jpg
    32.9 KB · Views: 165

Mark Nankivil

ACCESS: Top Secret
Top Contributor
Senior Member
Joined
Jun 13, 2007
Messages
1,627
Reaction score
508
Also has more than a familial resemblance to this:

http://www.secretprojects.co.uk/forum/index.php/topic,10946.0.html

Enjoy the Day! Mark
 

Jos Heyman

ACCESS: Top Secret
Joined
Feb 15, 2007
Messages
597
Reaction score
13
This is what Aerofiles has to say about this contraption:

Weilandcraft 1964 = 2pOFb; two 275hp unspecified tractors on pylons; span
(beam): 32'0" length: 52'0". Carl Weiland. Primarily wooden construction, the
catamaran hydrofoil design was proposed by Swiss inventor Weiland to Douglas
Co as a large-load transport that would "fly" in ground-affect more economically
and at greater speeds (v est: 115) than surface vessels. After many water tests
(photo background suggests Long Beach harbor), on 3/4/64 at about 75 mph, the
nose lifted the front skis, then the rear skis broke free, so it apparently flew to
some extent. Its flight, however, ended abruptly after the nose continued to rise
despite reduction on power—performing like some flat-bottom speedboats do
before they flip? It reads like a stall occurred instead and the craft hit the water
nose-high hard enough to pretty much disassemble it. Further development was
dropped. A comprehensive, illustrated article by Bruce Cunningham about this
rarity was in the Spring 2007 issue (52/1) of AAHS Journal.
 

hesham

ACCESS: USAP
Senior Member
Joined
May 26, 2006
Messages
26,670
Reaction score
3,464
From Russian book; экранопланы,

again the Weinland craft.
 

Attachments

  • 4.png
    4.png
    62.5 KB · Views: 56

Similar threads

Top