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Post by Deleted on Dec 1, 2016 13:41:48 GMT
Quick job today was lop the end of the cauliflower off ready to fit a second source of heat. It originally came out of my dads DC30 broads cruiser, last time round I fitted a hideously expensive 2 1/4" BSP socket for an immersion heater along with replacing the leaky radiator cap type pressure relief with a proper 1/2" BSP job. We have since fitted a Webasto, this has run OK on the single 'coil' but again, as the tank had to come out for this winters works I thought i'd add a second 'coil' As you can see It does't actually use a coil, rather a pipe bent thru 180 degrees, It wont be terribly efficient compared to modern stuff but its plenty good enough for us. pre the chop. post chop I've got to grab some stainless tube form the boat club to make up the new 'coil', holesaw two outlets in the opposite end then glue it all back together. Easy Peasy!!
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Post by smileypete on Dec 1, 2016 21:19:07 GMT
Wow! Impressed! Webasto's don't like underloading so another option is a plate heat exchanger and secondary water pump. I did a diagram of something similar for someone on the other forum and they were quite happy with the outcome
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Post by Deleted on Dec 1, 2016 21:29:02 GMT
Wow! Impressed! Webasto's don't like underloading so another option is a plate heat exchanger and secondary water pump. I did a diagram of something similar for someone on the other forum and they were quite happy with the outcome Yes, that's the plan. The original set up had the webasto teed in to the calorifier circuit along with a homebrew blower box made from a CR250 Motocross bike radiator and some DC case fans. It ran well enough but has been a bit stroppy getting air locks of late. I want to retain the engine pre heat the original set up gave me and give the thermo top something to do so a plate heat exchanger is the way forward. I'm going to put a bypass valve in the engine circuit so it can continue to heat the water without the aid of the webasto, I'm also going to add a switch and relay to the webasto circulating pump so I can effectively use both circuits while the engine is running without firing up the webasto.
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Post by smileypete on Dec 1, 2016 22:10:50 GMT
This is what I came up with for someone on CWDF: Here's the topic where it came up, the link to the image got broken somehow: www.canalworld.net/forums/index.php?showtopic=55788The reason the water goes round in a 'loop' is so that the engine doesn't get overcooled by cold water returning from the heat exchanger, and the calorifier heats from the top down which helps if you only want half a tank. I s'pse a webasto could be added in parallel on the engine side with non return valves to stop backflow, and a large blown air heater matrix on the heat exchanger return to mop up any spare heat from the webasto once the calorifier is heated enough.
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Post by Deleted on Dec 2, 2016 9:31:42 GMT
This is what I came up with for someone on CWDF: Here's the topic where it came up, the link to the image got broken somehow: www.canalworld.net/forums/index.php?showtopic=55788The reason the water goes round in a 'loop' is so that the engine doesn't get overcooled by cold water returning from the heat exchanger, and the calorifier heats from the top down which helps if you only want half a tank. I s'pse a webasto could be added in parallel on the engine side with non return valves to stop backflow, and a large blown air heater matrix on the heat exchanger return to mop up any spare heat from the webasto once the calorifier is heated enough. I like that!. neat solution to adding extra an heat source to a single coil calorifier.
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Post by Deleted on Dec 3, 2016 15:41:01 GMT
Today's efforts. Excuse the manky bilges, the cleaning fairy is on strike at the moment! Took the adaptor back to the boat to redrill the prop coupling to suit the R&D flexible coupling. I can now munch the adaptor down to 2 mm thick which I will be much happier about. Next up was attack some of the hull paint as we have had a dry low humidity day, so it made sense to slap sobe paint on and give it plenty of time to harden before I do the white hull paint and antifouling in the early spring. The silver is metallic primer for the Flag antifouling I use, there were a couple of patches that were a bit flaky so as I had a litre kicking about I used it on all the waterline. The blue stripe is International Toplac Blue, often I don't have much time between applying this and masking it up to do the white and antifouling, it's got plenty of time to harden off now! The rubbing strakes aren't in fantastic nick, they are likely to want replacing in 2-4 years time, as such they get a lick of brown paint to keep things tidy. I will need to give the rest of the hull above the waterline a blitz with the sander so the odd untidy bit of brown will be dealt with then.
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Post by Deleted on Dec 3, 2016 15:56:20 GMT
A clearer shot of the skeg, this is after not quite two years underwater, the galvanising is holding up well.
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Post by Deleted on Dec 3, 2016 16:02:58 GMT
The only tiny bit of corrosion on the skeg is at the end where the rudder bush bracket meets the skeg. The fit was a little tight and it was a choice between grinding it away or leaving it, I'm glad I left it! This bracket can be removed for bush replacement or rudder removal.
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Post by Deleted on Dec 3, 2016 16:03:15 GMT
Good job, finished in time for that Christmas cruise?
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Post by Deleted on Dec 3, 2016 16:05:53 GMT
Good job, finished in time for that Christmas cruise? I wish!! Plenty to do
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Post by Deleted on Dec 3, 2016 16:11:38 GMT
The stainless rudder is doing OK with no AF - it's quite expensive to get the right primer and AF for such a small area, I'm glad I left it to see his things went, it will get a clean and polish and that will do.
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Post by Deleted on Dec 3, 2016 16:18:40 GMT
Last one! I love and hate this exhaust! The bottom of the blue line is the waterline. The exhaust makes a pleasing sploshing gurgling sound at rest in idle. Underway the arse squats and you can't hear any exhaust noise. Then draw back is if the fitting let's go that's an afternoon with a pump... On balance I am happy to I keep it where it is, access to the exhaust from within the engine hole is good, the flexible hose is all new, so, as long as I keep a beady eye on it there should be no problem.
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Post by faffer on Dec 3, 2016 19:44:01 GMT
Luvin it kida, had quick read through, good to see a another blog going on, we need these to keep us motivated. how about some pics of the boat in full etc.
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Post by Deleted on Dec 3, 2016 22:19:40 GMT
Luvin it kida, had quick read through, good to see a another blog going on, we need these to keep us motivated. how about some pics of the boat in full etc. Will do, i have to remind myself to take pictures though! Was hoping to be down all day but forgot some lifting tackle so came to a bit of a natural halt. Happy enough with what I gut done, I fetched back the stainless I need to do the cauliflower at work next week and I can now machine that spacer, bit by bit we get there
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Post by faffer on Dec 4, 2016 8:51:52 GMT
Luvin it kida, had quick read through, good to see a another blog going on, we need these to keep us motivated. how about some pics of the boat in full etc. Will do, i have to remind myself to take pictures though! Was hoping to be down all day but forgot some lifting tackle so came to a bit of a natural halt. Happy enough with what I gut done, I fetched back the stainless I need to do the cauliflower at work next week and I can now machine that spacer, bit by bit we get there Taking pics has become a habit for me now, i do forget at times when i am busy at it though. And the beauty of having the boat at home for me, i dont miss forgetting to take things to the boat yard. I am tempted to bring the next bigger project home, need to sweeten T up a bit more for a 30 foot + boat. as you saya bit by bit, no ruuuussshhhhhh
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