Subject:
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Re: Props for Hovercraft
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 8 Feb 2003 16:03:17 GMT
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Viewed:
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3857 times
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In lugnet.technic, Ross Crawford writes:
> In lugnet.technic, Mark Haye writes:
> > Yes, I had tried that. I was unable to prevent all the rotation at the friction pin,
> > and even a small amount of movement there caused significant wobble/binding.
>
> Well I did a little test, heres the pics:
>
> http://www.brickshelf.com/gallery/RoscoHead/etc/prop/dcp_1409.jpg
> http://www.brickshelf.com/gallery/RoscoHead/etc/prop/dcp_1410.jpg
> http://www.brickshelf.com/gallery/RoscoHead/etc/prop/dcp_1411.jpg
>
> Note that the propeller shaft is cylindrical, not "x" axle-shape, so
> friction is much greater than standard axle.
>
> It worked reasonably well, even with no lubrication and old batteries. I
> reckon with some lube, and maybe even a more powerful motor, it would work
> really well.
>
> Oh, and running the axle vertically runs better than horizontally, so even
> better for hovercraft 8?)
>
> ROSCO
Nice design.
Oh man, the design of the 24t gear at the back of this propeler is realy
lame. That whole part is very un-legoish.
1) Perhaps you could use the old friction connector instead of the new one:
i.e. part 4459 instead of part 2780.
(see: http://w3.one.net/~hughesj/technica/registry/connect/conn_2.php)
It should grip the two gears together better.
2) If you're willing to cut (*gasp*) the annoying "bump" on one of your
Technic Crown Gear 24t I think it should "grip" the 24t gear on
all sides pretty well. I don't have the propeller piece, so let me know if
that works (that is, if you're willing to cut Lego, of course)
- David
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Message has 1 Reply:
 | | Re: Props for Hovercraft
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| You guys are bound and determined to spend my whole weekend tinkering on this, aren't you? ;-) I reproduced Ross's setup using a gray peg, a black friction peg, and an old black friction peg. I still get what I consider pretty poor performance (with (...) (24 years ago, 8-Feb-03, to lugnet.technic)
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Message is in Reply To:
| | Re: Props for Hovercraft
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| (...) Well I did a little test, heres the pics: (URL) that the propeller shaft is cylindrical, not "x" axle-shape, so friction is much greater than standard axle. It worked reasonably well, even with no lubrication and old batteries. I reckon with (...) (24 years ago, 7-Feb-03, to lugnet.technic)
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