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'Improving' the Aster Span Can

8136 Views 25 Replies 14 Participants Last post by  tacfoley
Mornin' All - First of all, let me say that the comment in this post was not generated by me, but by a member of another forum based over here in UK.

After bad-mouthing Aster products in general for a couple of years, he or she has finally taken the plunge and bought the Aster Bulleid light pacific to build.

I have already spoken to Mr Pullen about the contents of this post, and have heard his most sensible response, and caused it to be posted on the other forum via a second party, but since there are a lot of you in the USA who have also built this model, I would be very interested to hear your comments on his/her proposal/ideas, with a view to helping him/her to get it right, or to put him/her right.

Here is the meat of the quote -

'I am about to begin building an Aster Spam Can Pacific. It is unfortunate that such a highly detailed model is plagued by 19th century technology, OVS himself would be horrified.

The archaic meths burners will go but I am left with the silly hand pump in the tender for water top up. Now there is an axle pump when running, but an R/C controlled electric pump makes an obvious solution. The question is should I simply make this a motor and crank arrangement or has anyone any experience of a high revs turbine pump in minature[sic]?

A mate in the States has built a steam one for his Niagra[sic] class 71/4" very succesfully and it is a bit of a long shot but someone may have had a go in the smaller scales that would deliver at 60psi.'

So - Is he/she trying to solve a problem that does not exist? AFAIAA the loco is a proven winner with its current method of firing configuration, and IMO trying to out-guess Aster in the re-design of one of their most successful and fast-selling models to date seems to be pointless to me. The comment 'plagued by 19th century technology' seems a trifle out of place, too, but then I have only one Aster loco to judge by it, a similarly-fired BR01, and that works perfectly, even in driving rain and a howling gale.
Bleeve it or don't, I AM actually trying to help him/her, so your comments or ideas would be much appreciated.

Graders

tac
www.ovgrs.org
G1MRA
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The archaic meths burners will go but I am left with the silly hand pump in the tender for water top up. Now there is an axle pump when running, but an R/C controlled electric pump makes an obvious solution. The question is should I simply make this a motor and crank arrangement or has anyone any experience of a high revs turbine pump in minature

Hello Terry, some folks would not be happy even if the Loco was given to them. Maybe this person can pay Aster to "Redesign" a Spam Can just for them. Let's see: instead of a "Archaic" meths burner, maybe they can use a solar powered, radiant, ceramic tile (from the space shuttle) more Earth friendly burner. Maybe a ecentric from a driver axle can turn a small generator that will power a gyro balanced electric turbo water pump. Since this arrangement will create high revs., Aster will have to employ the people at "Lucas Oil" to develope a new oil to meet these high demands. Maybe something like the hydrolic fluids that were developed for the Mach. 3+ SR.71 Black Bird spy plane. Electro magnetic feeler gauges can be installed in the boiler to tell water level, thus doing away with the "Archaic" old fashioned water glass. A second boiler (also solar powered) could be installed in the tender to preboil the water to make sure that it is distilled. Aster chemist's could check the water every batch or two to make sure that nothing is leaching into the system that will attack the boiler silver soldering. Every angle on each throttle and blower part has to be redesigned and recut so that "perfect" adjustment can be achieved.......if it works for hundreds of other Aster owners out there but not just "one" .............it needs to be redesigned. /DesktopModules/NTForums/themes/mls/emoticons/hehe.gif
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