Beth Sailing Canoe - short cruising centreboard centreboard option?

robhosailor · #1 9th Jan 2008, 09:56 PM

Michael,

Do you remember our discussion of my idea of Beth's centreboard conversion to swinging one? Conclusion was to make second shorter centreboard without changes of centrecase for 60 cm total draft on shallow waters.

On plans of Beth given dimensions of centreboard separately (without assembled drawing with dimensions in scale) are.

I don't know how centreboard (as designed) long under boat's bottom is?

How total lenght of second shorter centreboard when total depth 60 cm?

From my calculations:
designed draft with centreboard circa 770 mm (???),

Is it truth?
I need to cut my second centreboard 170 mm ?

As an attachement I've posted my drawing for your opinion. Can you help me in it?

Boatmik · #2 10th Jan 2008, 12:48 AM

Howdy Robert,

Just make the spare centreboard the same length or a bit shorter than the one in the plan. Then you can test it in the boat to work out how much to cut off.

That is - you can sail with it retracted partly and see what level of performance is acceptable. When you have worked it out you can cut off the excess.

MIK

For everyone else ...

Robert and I had some discussions about putting a swinging centreboard in Beth. I don't generally like them much - the dagger arrangement is so simple in comparison.

I have used Beth mostly in shallow water and find little or no problem when I occasionally hit something. Over a decade of sailing I have had to repair the centreboard about 3 times despite hitting the bottom reasonably frequently - it takes an hour on one day and maybe 20 minutes on the second day. I've never damaged the hull.

Usually it is sand - but sometimes it is one of the limestone reefs that run across the lower Murray River.

The end result is I suggested to Robert that he make two centreboards - I actually have two for my Beth. One for deep water and racing and the other for cruising in shallow water.

robhosailor · #3 10th Jan 2008, 02:36 AM

Thanks a lot

!!!

Most of cruising (touring) small boats in Poland have swinging centreboards for comfortable sailing on shallow waters *). Our aquatories are generally very shallow waters (Mazurian Lakes are deep and shallow - shallow ones are with stones... Protected sea aquatories are shallow too - Bay of Vistula Estuary, Bay of Odra River Estuary /Szczecin/ and Bay of Puck. Central part of Vistula River is shallow too and tiny lake near my house too...). Many Polish designers prefer swinging centreboards but my friend Radoslaw Werszko is daggerboard enthusiast then are so simple to build. Problems with hit of bottom I expect of rudder too

...

---
*) My friend have 7.5 m long auxillary cabin boat with ballasted swinging (?) centreboard. He bought Echosounder for it. During small daysailing we hit bottom of centreboard 3 times

... Light boat is better for it

b.o.a.t. · #4 11th Jan 2008, 02:29 AM

Quote:

Originally Posted by robhosailor

Thanks a lot

!!!
my friend Radoslaw Werszko is daggerboard enthusiast

G'day Robert
Please tell your friend Radoslaw that I think he designs beautiful boats, and is incredibly generous putting them on the web for free. I especially like his 4M dayboat, & will probably build one next, after MIK's Eureka.
cheers
AJ

robhosailor · #5 11th Jan 2008, 06:28 AM

Quote:

Originally Posted by b.o.a.t.

Please tell your friend Radoslaw that I think he designs beautiful boats, /cut/

Hi b.o.a.t.

DONE!

PS: One of my favorite Radoslaw's boats is skiff 4.2 m (I like dories!):
http://www.dinghy.pl/42m_skiff.htm
you can see modification of sailplan on my home page too. Radoslaw preparing to build this one with another sailplan.

PPS: Sorry all for off topic discussion