Phoenix_V

Thanks for clarifying that, The Lea and Stort mooring proposals do not seem to take this distinction into account so i dont think BW do understand their own act, at quite a high level?

Not only lived on a boat but was the original "continuous moorer"

Following this line of thought we all need to consider using the lesser used waterways. We went to Birmingham a couple of years ago miles and miles of moorings near facilities if required, no one using them perhaps more leisure boaters and residentials should be prepared to go off their usual stomping grounds

Thank goodness

Just come in to this thread, havent read it all, so hope I am not repeating too much. This is indeed becoming a problem on the L and S and already is in London. It seems to me that it is inevitable that towpath dwellers are going to gravitate to the areas with most expensive housing and few moorings and strengthening 14 day rules (or should that now be 7 day rules as on the Stort) and making them play musical chairs within the same area aint going to help. The only sensible way of relieving congestion within London and the K and A is for those on cc licenses to be persuaded to cruise a wider area than some (not all) do. The L and S proposals and the new mooring guidelines have considerably watered down the requirement to cruise a substantial distance and I don't see that the Davies case requires them to do this.

Revised Mooring Guidance The new guidelines rather contradict what they are proposing for the Lea and Stort Well done by the way for bringing this to us.

Fair enough, my son has one so I would borrow his. I had made assumptions about the size of your boat, I have just reinput the figures into the prop programme and it now says 17 x 13 so full agreement ever so slightly underpropped

According to the prop program I have been playing with it's spot on.

according to waterways world there is now an iphone app which will tell you your rpm (2 and 4 cylinder engines only at present)

I would go with this I had a lift pump fail even though the tank was higher than the engine it restricted the flow, the engine would rev to max in neutral but no more than idle when under load, however the effect did fluctuate and seems unlikely if the OP has suffered from new as he says.

edited double post

This was my understanding but following the suggestion in the other thread that props were being specced to maximum torque, I wondered what was actually being done in the real world

Arent most(all?) diesels governed so that off load max rpm is just a couple of hundred more than on load?

Assuming no other problems if the prop exactly matches the engine it will enable the engine to rev just to it's rated maximum and no more, if overpropped by definition it will never reach that figure so all you need is a rev counter. If it's underpropped it will also make max revs and then the governer will stop it going faster unless its a petrol engine then you do have a problem.

I have always assumed that it is usual to prop a boat so that it can just reach engine maximum revs, a recent thread suggests that on canal boats (at least) overpropping to the extent that only 50% of max rpm can be reached is quite common and acceptable. It would be interesting to find out what is being fitted out there

Despite extensive reading on this subject my knowledge is little and often contradictory, but as I understood it it is unusual to overprop to the extent that the engine achieves less than 80% of max rpm. Reasons for overpropping include matching the power curve, better fuel consumption, lower rpm for a given speed (and hence quieter engine) Reasons for not overpropping include not being able to get full power from the engine (though many narrowboats are overengined anyway) and being less likely to overload the engine in trying to get to max rpm. I am shopping for a propeller at the moment and would expect the supplier to discuss with me the ramifications if deliberately over propping. I take it the Op's propeller has been on from new and has never done more than 2000rpm?

ASAP supplies

I've used polyurethane wood glue no problems so far

No one dredges any more the cost of disposal is to high, do what everyone else does and move the silt back into the main channel either as has been suggested with shovel and waders or use the prop in reverse to gently blow it away, regular movement of the boat will also help. If you have a keel cooled engine it is hard to see how it would be damaged if this is only silt.

Glazing a wheelhouse to comply with cat c I was told that 5mm toughened was acceptable but in laminate would need 7mm, went with toughened to save weight. I was also told that windscreen wipers etc are less likely to scratch toughened.

It is one of the odd quirks of marine insurance law, the value of the boat is agreed at the onset of insurance and in the event of damage unless repair is cheaper that is what they have to pay (less the salvage value if you keep that) Preferable in many ways to other insurances where you have to argue the value post event but, insurers will be careful not to insure the boat for more than it's worth and hence require a survey for valuation as well as confirming sea worthiness. We have used the Simpson scheme mentioned above on a small woolwich and found it reasonably priced with not too onerous survey requirements, never made a claim though.

I suppose if they spent the money intended for enforcement of the Lea and Stort mooring scheme on dredging instead then the problem might be sorted and the boats could move!?, but then of course they would have no money to force the boats to move, still seems less of a waste of money though

I have no reason to doubt what you say, but it is unfortunate that in BW public meetings whenever anyone says "you cant do that" they tend to reply "oh yes we can - Davies says so" consequently why we are keen to keep the draft in public circulation.

which ones?

This does not appear to be the full judgment either compared with the earlier draft on Smartguage's website, perhaps someone in the know can explain how this wroks