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Messages - Derek

#76
Boats / Re: N3277 Hedgepig
19 Apr 2007, 10:05
Hedgepig background.....

Designed for Tim Jones as a river boat without excessive compromise on open water.
I sketched a number of shapes until I came up with the final one.
It was designed to carry a moderate amount of weight and to have a little more rocker aft than was the trend at the time - Baggy 2 being the boat of reference then.
As a river boat tacking was important so the idea was to keep the waterline as smooth and narrow as possible with a fine straight entry like Pipedream but fuller however there was a definite attempt to put displacement into the topsides around 8ft. The objective was to give as much rocker as possible when the sheerline was on the water, hence reducing turning drag and speeding up tacking.
The final shape was passed by Rob Peebles who suggested a little more width to the garboard planks in the last two sections and that is what was finally built.

She was built by Tim and David, Martin Gunn and Peter Shore in Hucknall.
I do not think there is anything much wrong with the shape but I wanted a pure open water boat at the time and built Redshift 3270, effectively a Baggy 2 in 3 planks.
Very fast on flat water when windy but too light a dsiplacement - very VERY slow when it was light.
#77
I did not know anyone had ever made a plate with a hinge IN IT.
The rules say a plate must pivot about a single fixed point.
This is because during the dagger-board "debate" a structure was put together that allowed a centre-board to be fitted to a pair of vertical tracks either side of the plate case, thus still complying with the pivoting requirement, but behaving like a daggerboard.
As has already been posted there is also a precedent off an offset pivot or hatchet arrangement where the pivot is as low and as far forward as possible in the boat in order to minimise the required length of the plate case and the carried water. In extreme cases this involved a pair of fabricated arms that passed either side of the mast.
Dave Peacock was at the origin of most of these bits of whacky engineering.

I do not think there is anything to stop you putting trim tabs or foils on you plate if you can get them stowed to allow the plate to house.
#78
Boats / Re: N3003 Red Menace
14 Feb 2007, 03:46
[quote by=ntoa link=Blah.cgi?b=boats,m=3003,s=0 date=1170181377]The life of N3003 Respectable St.. Design: Bouncer, designed by: Jo Richards in 1977[/quote]

Redecked and double floored in 1998.
Daggerboard
#79
Despite getting organised enough to come back to sail, I still have not managed to find anyone enthusiastic enough to crew for me!
I will not have e-mail access from now on so if you could help me, please call 0033 6 8999 4454 anytime or 01395 272071 from Thursday evening.
I WILL be there!

Derek
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