KALT Rotor Heads (+ blades)

Most of the Kalt helicopter kits were marketed without the rotor head assembly which was considered a user 'option'.  The rotor head plays a major part in the control of a helicopter however, it was also the most expensive assembly and for a beginner, the 'expert' head would be an unnecessary expense when the 'basic' head would more than fulfil their need.  Thus the helicopter could be initially purchased much cheaper and then upgraded as required.  Additionally, for 'sports' flyers there was a need for an intermediate head assembly to bridge the gap between basic and the costly 'expert' head; providing that option would also help to keep costs down.  These options were much appreciated by buyers however, when coupled with a similar (but not quite as radical) variation in the basic mechanics kits meant that a lot of Kalt helicopters differed from each other to some degree; this is why generally both the model of the airframe and head are quoted.

Kalt FP Rotor Head (1971)

Fixed pitch 'teeter' with Hiller cyclic control.

Kalt Baron FP Rotor Head (1976)

 

Fixed pitch with Hiller cyclic control and flat plate flapping hinge.

Kalt K1-SB Rotor Head (1979 or earlier)

K-1SB

Collective pitch with Hiller cyclic control, lead lag hinges and teeter damping - Kalt K-1 SB Rotor head instructions

Kalt Black Head SB Rotor Head (1979 or earlier)

Collective pitch with Bell-Hiller cyclic control, lead lag hinges and teeter damping - Kalt Black Head SB Rotor head instructions

Kalt 4 Blade scale head (1980)

1983 photo fitted to a Slough Models Wessex with Kalt Mechanics.

Kalt Black Head Flybarless Rotor Head (1980)

Collective pitch with direct cyclic control, lead lag hinges and teeter damping.  Modified Black head SB rotor with flybar assembly removed and main blades connected directly to the swash plate.

Kalt Black Head 2 SB Rotor Head (19##)

Black head 2 SB

Collective pitch with Bell-Hiller cyclic control, lead lag hinges and rigid (to confirm).

Kalt Black Head 3 Rotor Head (19##)

Black Head 3

Collective pitch with Bell-Hiller cyclic control, lead lag hinges and flat plate flapping hinge.

Kalt K3 Rotor Head (19##)

K3

Collective pitch with Bell-Hiller cyclic control, lead lag hinges and flat plate flapping hinge.

Kalt K3 SB Rotor Head (19##)

Kalt K-3 SB Rotor head instructions  - 

Kalt Black 10 S rotor head

Black 10 S

Collective pitch with Bell-Hiller cyclic control, lead lag hinges and teeter damping.

Kalt Black 10 FS rotor head

Black 10 FS

Collective pitch with Bell-Hiller cyclic control, lead lag hinges and teeter damping.

   1987 Catalogue

Kalt Black 10 SII rotor head (19##)

Black 10 SII 1991 photo

High performance seesaw head constructed from duralumin with 14 bearings and performance suited to advanced sport fliers up to competition standard; 360 gram weight and 200mm between blade bolts.

Kalt Black 10 FSII rotor head (19##)

Black 10 FSII 1991 photo

Constructed the same as the SII along with 14 bearings however this rotor head includes additional 'flapping' movement incorporated into the blade holders with damping by rubber inserts; adjustment of this damping action being achieved by compressing the rubber damper with a threaded rotating lockable collar.  This head has a very smooth response by imposing the benefits of flapping hinges onto a seesaw head.  Slightly heavier at 385 grams but with the same 200mm between blade bolts.

Kalt Black 10 OF rotor head (19##)

Black 10 OF 1991 photo

Top of the line specification 1991 with many advanced features to give very precise and smooth control i.e. zero coning angle, thrust as well as double blade support bearings with variable damper adjustment by tapered bush.  Weight 430 gram with slighter smaller 190mm between blade bolts than the SII and FSII.

Kalt K5 rotor head (19##)

K5 1991 photo

Developed as an inexpensive 'sports' head utilising GRP (Glass Reinforced Plastic) construction but still retaining the 14 bearing layout; weight 210 gram and 179mm between blade bolts.           

Kalt K-5 Rotor head instruction  -  K-5 rotor head review  

Kalt 50 rotor head (19##)

 

Kalt S30 rotor head (19##)

specifically for the ZR version of the Space Baron / Enforcer
 

Zeal Rotorhead for Whisper
 

Kalt Rotor Blades

     Instructions for H-55 and K600 main blades

Tail rotor wooden blade instructions

 

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