Kalt Huey Cobra 450 (1971)


  Specification:

  450 500
 Length  1350  1425 mm
Rotor Head    CP model specific
Main Rotor Dia  mm  1480 mm
Engine  Enya 45BB
 .50-.60 cu in  (8.0-10 cc)
Gear Ratio  10.5 : 1 : 4.2  10.5 : 1 : 4.2
Full Equipped Weight  4000-4500g  4000-4500g

 

Documents: 
 
Huey Cobra 500
Manual

HueyCobra 450 Assembly instructions
   
Reports
     

 

 

   

The Cobra 450 was Kalt's first helicopter and an 'official' scaled down copy of Schlüter's Cobra, and designed to take the Enya 45BB, which was included in the kit.  The rotor head was a direct copy of the free teetering Schlüter head however, later versions of the Cobra 450 employed the non-teetering type similar to the MM Lark.

  

Nov 72 first Japanese helicopter competition; loads of Kalt Cobra's.

   Kalt (Yellow) next to an 'original' Cobra - Uwe Jantzen

 
modified for 'Drag' racing.

Kalt Huey Cobra 500 (1979 or earlier)

  1981 catalogue photos showing Flybarless head option.

By the end of the 70's, fixed pitch control had generally been assigned to 'trainers' and so the Cobra 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 and thus this version was given the '500' tally to differentiate from the original fixed pitch version.

Revised 500 Mechanics with modified gearbox

By 1981 the flatbed mechanics had been upgraded with autorotation and though the catalogue photo's above show a Flybarless head, the basic kit was marketed to include the K-1SB rotor head assembly; additionally the '500' designation was dropped.

Helipad -  Helicopter column in May 1982 Radio Modeller by John Heaton; review of Kalt Cobra 500.

1982 Advert (UK) Indicating a revised rotor head.

 
1985 Circus Hobbies (USA) catalogue
with Flybarless head option in the photo but listing the standard supply head as the K-1SB.

 

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