Behaviour of a Ground Effect Machine 



BOTTOM VIEW 



WITH RIGID JET £XITS 



WITH FLEXIBLE TRUNKS 



SECTION A-A 



=q 



SECTION B-B 



SECTION B-B 



SECTION C - C SECTION C - C 



Fig. 1 - General arrangenaent 



Table I gives some of the principal characteristics of the "SKMR-I." It was 

 equipped with four independently controlled cushion fans, driven by synchronous 

 electric motors. The number of revolutions of the cushion fans could be adjusted 

 by changing the frequency of the alternating current supplied to the motors. 



The cushion fans of the model were designed independently of the fans in the 

 actual G.E.M. Therefore there is no relation at all between the numbers of rev- 

 olution per unit time mentioned in this paper and the values for the actual vehicle. 

 They should be considered as a parameter representing the power absorption. 



The model was tested with two different bottom configurations. The first 

 one had rigid jet exits, in the second one the jet exits consisted of flexible 

 trunks. Both are illustrated in Fig. 1. The flexible trunks were manufactured 

 of a plastic covered fabric. The shape was maintained by means of air pressure 

 provided by the jets. Propulsion screws, nozzles and control devices were not 



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