Stern post

[WotEver]

Are you saying in effect a flat stern post and then fixing a fairing to smooth the flow of water rearwards towards the prop, if so BRILLIANT if not Ive just thought of something briliant

 

I don't think that's what he was saying, no. But yeah, it's brilliant

[Swallowman]

Not a full circle certainly but enough of a curve at the top and bottom to locate the rotabroach type arbour if you have a steady arm. The hole would have to be a bit bigger than the outside diameter of the stern tube to accomodate any errors in alignment. Any imperfections can be filled in when the stern tube is welded into position at the correct angle.

 

Sorry, this was in reply to an much earlier post in the thread, it makes no sense now - please disregard.

Edited August 21, 2009 by Swallowman

[blackrose]

Of course narrow boats are high performance craft. They are not fast in restricted channels though many well designed hulls will reach their maximum displacement speed in open water. .

In the open waters of the tidal Thames where I sometimes go, narrow boats are probably the lowest performance and most underpowered craft and for that reason are viewed unfavourably by commercial skippers as well as the PLA. This was probably part of the reason they brought in the requirement for VHF radio downstream of Brentford a few years ago - simply to dissuade us and restrict the movements of narrow boats and other low performance recreational craft. Even the ridiculous looking amphibious yellow Duck tour boats can perform manouvres against fast flowing currents that one would never dream of attempting on a narrow boat in a tideway.

 

http://www.londonducktours.co.uk/gallery/duck16.htm

Edited August 24, 2009 by blackrose