Subject:
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Re: Liebherr R996 Mining Excavator
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 11 Jul 2002 12:58:52 GMT
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Viewed:
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1355 times
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In lugnet.technic, Jennifer Clark writes:
> How about bolting on a wee (or not so wee) compressor onto the hand controller?
> Get something driven by two gear motors in there and you’ll be sorted for power
> and speed.
That's a good idea (the not-so-wee one ;-) I could probably take out the
air tanks and add a second compressor in the body of the model.
> We can patch in my excavator one at Brickfest and see if it works ;-)
Fortunately the tubes and wires in my controller are easily accessible. Oh
yes, we'll have some fun!
> Do you like the airtanks?
Um, now that I think about it... No. They take too long to "pressure up" and
then are quickly depleted. The pressure is zapped once the digging arm is
fully extended (requiring 8 cylinders).
Of course the tanks do allow me that "boost" so that I can work the arm
quickly and impressively, although only for a few seconds.
> I tried with and without on my colleagues at work and
> the jury was out on the matter. Some like the boost you get from full tanks, others
> were a bit confused by the difference in performance and different levels of tank
> fullness. I tried to make a “gasometer” thing from many large pneumatic cylinders
> with elastic bands holding the pistons back to try ensure a relatively constant air
> pressure at different volumes, but I can’t remember how well it worked :-)
>
> Personally I prefer the pneumatics without airtank, I like the constant performance
> and by omitting the airtank space can be saved. If you have a powerful enough
> compressor you can probably do without them anyway.
I'll try that with my model, and we can experiment at the 'fest too. I don't
think my one compressor is suited for the job, though. I'm sure I'll have to
add more compressors, like yours ;-)
One interesting thing about my set-up is that the long lengths of tubing
create a large volume that has a similar effect as the air tanks. If I took
out the tanks, I'd still have to contend with it.
TJ
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Message is in Reply To:
 | | Re: Liebherr R996 Mining Excavator
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| "Thomas Avery" <thomas.avery@intec-hou.com> wrote in message news:Gz1otv.DMC@lugnet.com... (...) How about bolting on a wee (or not so wee) compressor onto the hand controller? Get something driven by two gear motors in there and you'll be sorted (...) (22 years ago, 11-Jul-02, to lugnet.technic)
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