Dawing vacuum on my canoe mould


Dawing vacuum on my canoe mould
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rmaddock
rmaddock
rmaddock
posted 8 Years Ago HOT
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Having been kept away from my canoe project by such trivialities as working in lieu for the workshop rent, I got back to trying to get a good vacuum on my mould this morning.

This is the first time that I've tried using the whole mould, having done a test on one end before now.

I'm nearly there. I've bought a Sealey ultrasonic leak detector to try out. The result is that it's great for finding the gratuitous leaks that you need the pump running to find but isn't sensitive enough to find the last few little leaks. Next week is the half term for my boys so I'm going to take their younger ears along once the storms have stopped blowing and see if they can hear the hiss.

So far, this is the vacuum drop over a five minute test with the pump off.



Not good enough yet :-(

I must make a canoe this week. I must!
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Dawing vacuum on my canoe mould
rmaddock - 8 Years Ago
     They are the worst kind of leaks, as it'd be very unlikely that you'd be able to hear the air ingress given the relatively small leak. If a thorough pressing down of the tape all around thebag...
MarkMK - 8 Years Ago
             Cheers Mark. Yes, I've found from my own experience that the inlet and outlet connections can be one of the biggest problems.
rmaddock - 8 Years Ago
                 Not certain if you already employ the same, but I apply a small donut of tape to the top of each connector and seal the bag over it when I get to that point. This helps keep it positioned and helps t...
MarkMK - 8 Years Ago
                     No, I do not do that, but I will be doing from no onwards. Thanks!
rmaddock - 8 Years Ago
     Hi Maddock, Keep plugging with the bagging and i am sure you will get there in the end. Definitely not quite there yet on the leak test but ultimately thats why we do a leak test so it's better to.....
Warren (Staff) - 8 Years Ago
     It's not been mentioned, but also make sure that you're isolating the vacuum end of your set-up when performing the leak test to eliminate the catch-pot as a possible leak source (this is not...
MarkMK - 8 Years Ago

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