Subject:
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Re: Helicopter rotor in 8856... unrealistic?
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 13 Feb 2003 23:07:45 GMT
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Viewed:
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859 times
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In lugnet.technic, Pehter Abrahamsson writes:
> Dean Hystad wrote:
>
> > The rotor design for the 8856 and 8444 would not allow the helecoptor to
> > move forwards backwards or sideways. If you tilt the rotor (as is done in
> > these sets) the only thing that happens is that the fusalage of the
> > helecoptor tilts. In a real helecoptor the blades's pitch varies as it
> > rotates around the hub. The stick controls the pitch of the rotor.
>
>
>
> It has already been made by Lego in 1977, 852 Reconnoitre Helicopter.
> Wonder why they did not do that later on also?
Yep, but 852 only has collective control, and relies on gravity! Ben's has
limited cyclic control (nose up/down), and no collective, but that's just a
limitation imposed by the original 8444 model - full collective and cyclic
could be done with Ben's mechanism, although collective control would
require the "ball gear" to slide up & down the rotor shaft.
Note that the mechanism used in 852 can be used (with some mods) on the tail
rotor, as it doesnt need cyclic control. You can see an example of this in
my own helicopter model http://www.lugnet.com/~469/projects/helicopter
ROSCO
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