A while ago I speculated wildly about the cost of heating a jacuzzi. Since then, I got hold of an hour meter and fitted it, so I now know exactly how long the element is on for.

Turned the jacuzzi on on Friday evening, with the water at 10 degrees. On Saturday evening the temperature was at 46 (! — I modified the thermostat a little and my setting was obviously off) with the hour meter reading 12.17 hours. Since the element is a 4kW unit, that’s 48.68 kWh, which costs around R50 these days.

My original calculations worked out to about 28 kWh, but it did not factor in heat loss — i.e.  the energy to heat the water, not to keep it warm.

Well, the hour meter reports that the element was on for six hours from Saturday evening to Sunday afternoon (a period of 19 hours), keeping the water at 40 degrees and the cats happy (they discovered they can lie on the cover, their own hot-water bed). This work out(roughly) to 30 kWh (or R30) per day.

Bottom line: a jacuzzi loses a lot of heat to radiation, and it’s cheaper to turn it on as needed than to leave it on all the time.





So the other day I was at the range with my Rossi SRC in 38 Special / 357 Magnum and I short-stroked the lever and pulled the trigger. *click* — that was to be expected.

But the next trigger pull also resulted in a *click* — Hmmm, broken firing pin.

Of course these things are not available locally, but a question on GunSite put me in contact with  Adlow Engineering (speak to Leon), and R700 got me a new firing pin.

RossiFiringPin

Of course some hand fitting (grindstone and file) was required. No, this is not a trick photograph, I ordered two, kept one for a spare.

The pin is still a bit long, gives a very positive strike. I might have to stone it down a bit more.





2
Jul
'10

selebi_1

This man was one of the main supporters of the South African Firearms Control Act of 2000. He thinks firearms are “evil things“.

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This man is responsible for ending smallbore rifle shooting at schools, collecting the rifles, and melting them down.

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This man is guilty of corruption and, if all goes well, will end up in jail.

Veuve Clicquot

This lady and I have some serious celebrating to do.

Update, 3 August 2010: 15 years. Yes!

(Yea, I know it’s not because of those beautiful little Anschutz rifles he melted, but I don’t care.)