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Post by enigmas on Feb 6, 2014 13:33:30 GMT
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Post by Warwick on Feb 7, 2014 1:50:11 GMT
This summer in Melbourne (OZ) where I live has probably been one of the hottest since records have been kept. Every day over the last week and to the coming weekend has been in the 30s and early 40s C. Nice work Vince. Coincidentally, today is the 5th anniversary of Black Saturday.
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Post by enigmas on Feb 7, 2014 2:49:27 GMT
Also coincidentally, it's our daughter's wedding anniversary. Her wedding was in a park and the temperature on the day was 48*C. Everything and one was wilting!
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Post by Warwick on Feb 7, 2014 3:48:02 GMT
I suppose if everyone is dripping with sweat, there's no need to feel self-conscious - but it must have put a bit of a dent in her day. It's hard to function properly in that sort of heat, and everything becomes an enormous effort.
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Post by enigmas on Feb 7, 2014 7:23:53 GMT
Well apart from the extreme heat Warwick and the shocking bushfires which we knew nothing about on the day, it was a fantastic occasion as the reception took place in a city art gallery with an incredibly upbeat live band. Back on topic: Here are the final pix and a little movie file of the shroud in place. It seems to work a treat. A little video of the engine running below. Final note: I wouldn't mind adding a couple of 'discreet' bonnet vents at the back of the hood (like those on an MGA...but obviously without the MGA script) if I could find something suitable as the design did not allow for the venting of hot air from the engine bay.
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Post by Roy of the Rovers on Feb 7, 2014 11:56:16 GMT
Nice work! Very satisfying to make something out of nothing. I did a welding course a few years ago and must admit I much preferred the oxyacetylene set up to mig tig etc..
I've seen the rear of the bonnet raised to allow hot air to escape, and I had a play with a louvre stamping machine on a spare bonnet on the same welding course. I'll upload a pic if I get chance. Again the purpose was purely to let hot air escape.
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Post by enigmas on Feb 8, 2014 1:31:10 GMT
Hi Roy, yes I like using my oxy/acetylene set too. It's a very versatile piece of equipment. The welds on the side panels above were done using that kit. If you learn on an oxy/acetylene set you'll gain a real understanding of heat distortion. You'll also gain a real respect for the body-men and customizers of the past who only had this equipment and 'stick' welders.
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Post by barryr on Feb 8, 2014 21:39:23 GMT
Totally agree. When I bought my p5b I hired it out for tv work. The money it made me paid for a compressor (3hp 150 litre) and a mig 130 that I have to this day. It also paid for night school at hillingdon college to learn welding.
I loved oxy-acetylene too. I was always going to buy a set but held back because of gas costs. Since I dumped my BOC contract for hobby gas I could probably affair one now!
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Post by enigmas on Feb 8, 2014 22:56:51 GMT
Barry I'm a bit of a 'welding nut'...I really enjoy joining pieces of metal together in my various projects as you may have gathered from my posts. Since I'm a non-smoker and a very moderate social drinker, I see the BOC rental as my indulgence. At least my wife can always gauge where I am! It's always good to have a little meditate before 'running a weld', to get into that Zen zone to ensure a nice straight and even bead.
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Post by barryr on Feb 8, 2014 23:03:39 GMT
Lol - I think many of us need therapy!
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Post by enigmas on Feb 9, 2014 12:18:36 GMT
Here's a little up update on the Fan Shroud. Today the temperature reached a high of 41*C (A nice summers day in Melbourne ) I warmed up the car whilst I moved the other vehicles out of the driveway. I then went for a quiet drive for about 35-40 mins in relatively dense traffic. What I did notice is that the temperature needle (original Mk3 Rover gauge) stayed virtually static during idling time in traffic and that the fans didn't switch on at any stage. For a mechanical fan to be properly effective it needs to be fully surrounded by a cowling that virtually covers the whole of the radiator fin area. It also needs to conform quite closely to the perimeter of the blades as well as virtually covering most of the blade. This creates a strong draw of air across the whole radiator fin surface area. As far as I know none of the P5s (any model) have this arrangement for their mechanical fans. Neither does mine, although it does have a large custom made alloy radiator. The shroud I constructed really only works on the top half of the radiator and it's not a tight fit around the fan blades. But it seems to work very effectively. Given that most of the hot coolant is at the top of the radiator and as it cools it drops to the bottom, which may explain it. Either way, it really has improved matters on days with extreme temperatures. It would be interesting to see if some of the P5Bs I occasionally read about on this tech board that experience overheating symptoms (fitting of Kenlowe fans and the like) would benefit by fitting a shroud/cowling.
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