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    United Kingdom

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    Design Technology Teacher
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    Hemel Hempstead

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  1. Hi all, long time no see been busy working We have just bought a 12v fridge - finally!! It is one of the tiny models that has the 'radiator' hidden behind the fridges outer shell. To me this seems somewhat inefficient at transferring the heat. I assume there are a whole load of pipes behind that move the heat into the outer shell. Has anyone taken off their outer shell in order to improve the efficiency of the fridge? Another thought - there is the option of fitting a 12v fan that will cycle with the compressor. However will this improve the efficiency enough to warran
  2. Sorry for the delay seeing this - catching up after a lot of work elsewhere. Yes we did have that system for some time. There are a number of positives. 1) all smell diverted outside 2) no chance of spilling the cassette inside 3) seemed cleaner and more hygienic 4) takes up less space 5) spare jerry cans cost £20 each 6) jerry cans are easy to empty Downsides: 1) Uses slightly more water 2) Needs plumbing in 3) Need a way for the jerry can to vent the air (ours was crude) 4) Harder to tell when full. We actually used a macerator due to the length of pipe it had
  3. I am planning to use some tex screws (with a hex head) to secure door hinges to our boat. Problem is that will leave me with doors which are very easy to undo with a spanner. Does anyone know of a tool or method to round them off once in. I imagine there could be a tool that goes in a drill which might be used for rounding off rivets which might work. A slow method might be to grind off each corner with an angle grinder Thanks!
  4. Well if the motor could move the ship (even if it managed 1mph which is ridiculous) the tide might be moving at 5mph leaving you at -4mph. It was an odd analogy anyway.
  5. Thanks for all the replies, apologies for not replying sooner. I'm going to do some practical experiments to see what i can find out. What about the tide?
  6. We went for a candy from argos. It is full sized frontwise - 80cm high and 55cm wide but it is only 40cm deep and so fits fine on the boat. Best thing we bought. People talk about twin tubs as being better for saving water but they use almost 50 litres for each 'rinse' - because the clothes have to float in the water. Our candy uses 55l over the whole wash. Reason being it knows how much you have put in and fills up until the clothes are sodden rather than covered. Was £220 reduced to £160. Pm me if interested and ill find out the exact model. Plumbed into the hot water fee
  7. Because if I explain the whole system people will start talking about how the batteries won't cope or how it would be easier to do it a different way. But I don't want to know about batteries. I want to know if the outboards will push the boat fast enough. Equally I don't want to be told outboards are no good at steering narrowboat a because a) that's not the question and because I know fully well that they work perfectly well. I'm not sure how battery capabilities or charging ability, mounting, steering or suchlike have any bearing on the overall speed. Hope that makes sense. I did
  8. Everyone seems to be doubting the ability of an outboard to push a narrowboat. Can I clarify we have no rudder and have lasted most adequately with our 10hp engine. Can easily upset boats by going too fast (if we wanted to!) and can stop in half a boats length going into locks. If anything we have more control since we have direction in reverse. I can do the equivalent of a hand break turn and swing round in one boat length! Not sure where the confusion has come from.
  9. True true. But my topics usually go off on tangents. If I explained the complex version people would say it's too complicated to work. Thing is that it's a very simple system but with a back up component for every aspect of the design. If I explain the simple version people say "what if" It's like me questioning whether direct drive is a danger to canal users - what if you break down and can't stop? What if you run out of diesel. Or the rudder breaks? Desperately trying to stay on topic but Power comes from an engine in the front.
  10. A good point but bear in mind we would have 6 times more power than you have. Again I didn't want to over complicate but since emergency stops are an issue - I plan to have the current 10hp petrol (or maybe converted to lpg) engine mounted in position linked with the morso control. When needed the outboard would kick in. Again I won't explain exactly how in this thread but have worked out a way to get it on and in gear within 1 second automatically.
  11. We weigh 6 ton and are 33ft long. I can easily get the boat going at canal speed just by pulling the ropes. Obviously if someone is catching up with us we let them overtake. And going into locks should be done slow anyway. Never had to put it into reverse and rev hard. I enter locks at tickover then flick it into reverse as we get to the gates - maybe due to being an outboard we have good steering in reverse. I then hop off and tie up. Any idea what power rating? Stupid question but what does S/H mean. Been a long day.m Edit- it means second hand!
  12. See you say that yet we currently have a 10hp engine and I have never maxed it out and usually have it running just over tickover. That suggests 10 is more than enough.
  13. Interesting. Wish I could get in contact with him! When you say slow progress. Do you mean slower than walking pace. I have noticed that our top speed at the moment of 3mph is easily dwarfed by a lot of boats so your idea of slow may be different to mine! Power source is sorted out. I feel I shouldn't go into detail yet to avoid complicating the topic! My topics usually go off course within a couple of comments!
  14. Interesting question. My grandad mentioned a couple of years ago having seen one pulling a boat. Personally I think it would be great to see them more often. You need a long pole to lift the rope over boats.
  15. I first posed this question in the midst of another topic but now I am planning out my next project properly so looking for points of discussion. What are the pitfalls of using a 86lb trolling electric outboard motor to power a narrowboat. Two of them. I am trying to work out if the idea is feasible. I know they will push the boat but the sticking point is will they push it fast enough. I found this video made by rob bolwell and although I tried contacting him I have had no reply. Anyone know of him? https://m.youtube.com/watch?v=wjA17Fb-WXM It seems to be going at
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