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post #6092 of Old 02-08-2014 Thread Starter
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Kuka-light is really very light:

Originally Posted by capt vimes View Post
Regarding the kuka light...
I am a little surprised that the kuka is with 3.2 t only 800 kg lighter than an plywood epoxy boat in her race trim one could build in his garage...
Didi 40cr radius chine plywood sailboat
And this homebuild boat has aluminum spars, 1.5 m less draft and 2 t ballast in a conventional keel casing made of steel... I imagine that the kuka has probably a little more than 1 t in her canting keelbulb...
If i look at the effort those guys put in to build the boat, i come to think that her lightness is not that extraordinary, just expensively bought...

And i know you cannot compare these two boats... The kuka has way more power, more sailarea and is by all means a lot faster... I just looked at the weight figures...
I don't know why you say that the Kuka-Light has a little more than 1 ton of ballast. If we were talking about a mass market cruiser with the same characteristic of others a guess could be made, a relative one, but in what regards top racing boats that is hard to do. Regarding Open an 60's or a class 40 the box rule implies very similar ballasts to each boat but this one is truly an Open boat, following no rule. They don't give the ballast an that can go from 30% to 60%.Probably it is not by accident that they don't disclose the ballast.

Regarding the comparison with a DIDI 40, you are not talking about boats with the same dimensions. The Kuka light is not only bigger as much more beamier: more about 79cm in length and more 120cm in beam.

Comparing with a boat with the same type of hull and beam but smaller, a 40 class racer, for instance a racing Pogo 40 class (s2), the difference is huge: the Pogo with less 62 cm in length and less 10 cm on beam weights more 30% and that's huge considering the Pogo is a smaller boat.

Yes, a 42ft sailboat with a 4.6m beam weighting only 3200 kg is an extraordinarily light boat. Consider for instance that a A35 weights 4450kg and the Elan 320 weights 3690 kg and is one of the lightest boats in its class.



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Last edited by PCP; 02-08-2014 at 10:21 PM.
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