Subject:
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Re: SSClagorpion - Compressor
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Newsgroups:
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lugnet.technic
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Date:
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Sun, 23 May 2004 16:58:02 GMT
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Viewed:
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19692 times
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In lugnet.technic, David Laswell wrote:
> In lugnet.technic, Mark Bellis wrote:
> > You can minimise 1. by using flex tubing for the straight tubes and pneumatic
> > tubing only for the curved tubes and in places where flexibility is
> > necessary. This will reduce the balloon effect and increase efficiency.
> > Test this with a 5m long pneumatic tube between the cylinder and compressor -
> > see how much longer it takes to get up to pressure than with a 5cm tube!
>
> Lessee, 5m tube vs. 5cm (or .05m) tube...I'd guess something approaching 100x as
> long? :) I'm guessing you meant to type something a little different there...
>
> Anyways, by my eye, the flex-system tube OD is roughly the same as the OD of the
> pneumatic nipples. I'd be worried about how painful (both physically and
> mentally) it might be to attach all of those hoses and how easily they might
> split under pressure. I just tried to attach one and I couldn't even get it
> started, so I'm very curious how you go about doing it. Do you use a short stub
> of pneumatic tubing as a sleeve coupler, or have you actually managed to cram
> one of those things onto a pneumatic nipple?
Yes, the 100x length difference will give a significant balloon effect. I
suppose realistically 40cm to 5cm would be a fairer comparison. Set 8868 came
with a 5m bundle of pneumatic tube.
The use of flex tubing in sets began with sets 8837 excavator and 8868 crane
truck: http://www.bricklink.com/catalogItemPic.asp?S=8837-1
You make pneumatic tubes of length 3-8cm, depending how much flexibility you
need at each end, then use the 3cm tube to connect a cylinder nipple to a flex
tube. Push the pneumatic hose onto the flex tube by about 8mm. Then you can
use clip plates to hold the flex tubes - much tidier!
Mark
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Message is in Reply To:
 | | Re: SSClagorpion - Compressor
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| (...) Lessee, 5m tube vs. 5cm (or .05m) tube...I'd guess something approaching 100x as long? :) I'm guessing you meant to type something a little different there... Anyways, by my eye, the flex-system tube OD is roughly the same as the OD of the (...) (20 years ago, 22-May-04, to lugnet.technic)
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