Re: Dual Hex small piston compressor (repost)

In lugnet.technic, Steve Lane wrote:
> In lugnet.technic, Kevin L. Clague wrote:
>> After some research, I proved to myself that small pneumatic pumps are best for
>> motorized compressors (what a suprise, Dr. Soh was right ;^)  For those who are
>> unaware, Dr Soh, is a long time LEGO pneumatic enthusiast, who is particularly
>> interested in pneumatic engines.  He has a great website here:
>> http://www.fifth-r.com/cssoh1/contents.htm  When I first got started on
>> pneumatics, I learned much about pneumatics from his site.
>>
>> Given that so many of my creations are pneumatic, I need a good compressor.
>> Here is my best so far.  Two battery boxes, two RC racer motors, and 12 small
>> pneumatic pumps arranged in two radial six piston compressors.
>>
>> This made an appearance at BrickFest2004 but was not in working condition because
>> of broken hoses.
>
> Hi Kevin
>
> I've just been studying the pictures again and they gave rise to a few thoughts.
> The broken hoses, I'm assuming you mean they pop off rather than suffer fatigue
> cracking, so is this because the pressure generated inside can become so great
> it pops a joint or is it due to the actual movement back and forth of the
> compressor bodies waggling the joints loose? I think that the shortness of the
> lengths of hose must make them relatively inflexible, possibly exacerbating the
> waggling problem. I've always thought that some of the energy is wasted bending
> the hoses that could be used to compress more air, and I suppose the more rigid
> the pipe the more energy would be wasted.
>
> Steve

Hi Steve,
  I literally mean broken.  I changed some of the beams to get a different
color, and in thbe process created a hose cutter (not unlike a paper cutter) and
unwittingly sliced hoses.

Once fixed, I never had problems with hoses popping off.  I made sure to use new
hose.

Kevin