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Vintage RC Helicopters - Kalt Rotor Heads
Various Rotor Head assemblies and upgrades. Most of the Kalt helicopter kits were marketed without the rotor head assembly which was then a user 'option'. The rotor head plays a major part in the control of a helicopter however, it was also the most expensive assembly. 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 purchased much cheaply and then upgraded as required. Additionally, for 'sports' flyers there was a need for an intermediate head assembly to bridge the gap and thus provide a head to cover all needs. This was very useful but when coupled with a similar (but not quite as radical) variation in the basic kits meant that most Kalt helicopters differed from each other to some degree.
Kalt Black-10 SII rotor head
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
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
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
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-1 SB Rotor head instructions - Kalt K-3 SB Rotor head instructions - Kalt K-5 Rotor head instruction - K-5 rotor head review - 1989 courtesy Model Helicopter World - www.modelheliworld.com Kalt Black Head SB Rotor head instructions -
Tail rotor wooden blade instructions Top of Page (VRHC - Vintage Radio controlled HeliCopters) |
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