Kalt Hughes 500D (1974)

 

  Specification:

 Length  1250 mm
 Rotor Head  CP model specific
 Main Rotor Dia  1480mm
 Engine  .50-.60 cu in  (8.0-10 cc)
 Gear Ratio  10.5 : 1 : 4.2
 Weight  4500 - 5000 g 

 

Documents: 
   
 

plan Hughes 500 fuselage
Reports
 
   

 

 

 

  

Forth in the Kalt range and another scale model utilising the Kalt 'Flatbed' mechanics with fixed pitch rotor head.

Nürnberg 1975

Presented at the Nürnberg show though not under the Kalt name but on an importers stand (MRC); no further info available after that in the European market anyway.

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Fixed pitch rotor head (photo from JetRanger).

Collective pitch upgrade (1979 or earlier)

1981 Catalogue photos

By the end of the 70's, fixed pitch control had generally been assigned to 'trainers' and so the JetRanger was upgrade to take a collective pitch head and autorotation clutch.  In line with Kalt's policy the kit was provided without a rotor head and the customer chose the specification of the head themselves.  For this later model the OS 50H became the minimum size recommended engine however as the model already had the '500' tally as it was a Hughes 500 the name could not be amended to differentiate from the original fixed pitch version.

In 1980 a four blade head was also available for the model though no info on the head is available.

By 1981 the flatbed mechanics had been upgraded with autorotation and the basic kit was marketed to include the K-1SB rotor head assembly as noted in the photo's below.

Uprated Autorotation mechanics with K-1SB head assembly.

1985 Circus Hobbies catalogue  K-1SB rotor head

 

Some photos from the flat-med mechanic with modified tail drive.

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