Del Mar helicopters

Jemiba

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Johnbr

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Found this this is new one for me.

The ultimate evolution of theDelMar helicopters was the tandem-rotor DH-20. Conceived as a super-portable medical evacuation helicopter, the DH-20 was powered by twin turbine engines and designed to carry a pilot and two passengers, or a pilot and one passenger in a litter. Remarkably, the entire helicopter was able to fold up for ground, sea or air transport, and was capable of operating in and out of far smaller landing zones than a traditional helicopter. As testing of the DH-20 continued, however, the requirement for such missions declined, and the aircraft was never put into production or flown operationally.
 

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Jemiba

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Soem pictures of the DH-1 "Whirlymite" from "der Flieger", Januray 1963. The drawing
shows the dynamic/propulsion part only, without seat or landing gear
 

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Sineva

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I found some more pics for the DH-20
522b-iumkapw4611471.jpg
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One of the neat things about this little machine is its transmission system,it uses 2 rubber gilmer type toothed belts to drive the rear rotor and also the front rotor via a drive shaft.Very neat and simple.
IMG_1249.jpg
Heres a video of the machine in a museum
And heres a link to an image gallery of the machine in question in its museum.
http://svsm.org/gallery/dh20

Theres also a gallery of the DHT-2
http://svsm.org/gallery/dht2
IMG_9283.jpg
IMG_9319.jpg

Theres a video showing the machine operating in tethered mode attached to its mobile landing pad,interestingly the pad itself has a motor driven fan under it which allows it to generate an air cushion,this allows it to move with the tethered helicopter during flight training.Quite a neat concept for a microlite trainer.

And heres a really strange one,its an 7/16th scale bell 205 body mounted onto the frame of an unmanned DH-1 for use as a remote operated AA training target.
Bk8D1UuCYAAO6aH.jpg
353-1.jpg
 
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hesham

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Thank you Sineva,

but I don't know if DH-2 was the same as DHT-2 or not ?.
 

Sineva

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Thank you Sineva,

but I don't know if DH-2 was the same as DHT-2 or not ?.
I`m not sure that theres really any difference between the DH and DHT apart from the air cushioned landing pad with its tether for pilot training.If you mean the difference between the DHT-1 and DHT-2,then the main difference would be the powerplant which is now a turbine.
213-2.jpg
Heres the original DHT-1 with its 6cyl opposed piston engine.
 

hesham

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Thank you Sineva,

and a large numbers are missing from its series,we know only DH 1 & 2,from 3 to 15 are not recognized,DF-16 Flare was a target,and
DH 17 to 19 also nothing ?.
 

Mark Nankivil

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hesham

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From Air Force magazine 1967,

here is DF-14 target.
 

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