Warped hull moudling

[gtflash]

Ive spent ages wondering HOW they mould 2 or 3 or 4 different hull lengths out of one mould when its NOT a constand deadrise hull.

Can someone spoon feed me, as my tiny brain really struggles with this. I can only presume that there is a constant deadrise flat section aft and for eg on a 6.5m boat this is tiny, yet on a 9.5m this is 3m longer?????? Or do they do something different?

Im sure this question was asked several years ago by myself and i never understood the answers

[Downhilldai]

Are you thinking of the different profile of the hull where the transom 'dam' sits in the mould?
I expect the laminators use a different size chunk of plasticine to seal off the transom dam to the hull, or maybe different transom dams for the different hull lengths.

[biffer]

in a lot of moulds the back half is parallel and the transom section can be bolts where you like but 3 metres is a bit much, general rule is that the boat is approximately three time longer than the width ie 8 mts long 2,6mts wide, there is a balance, i wouldn't take a 6mt out of an 8mt mould, it would be to wide and not a good boat, have a look at the pic, the back half is parallel

[chewy]

Most of the Humbers appear to be done like this. ie the beam doesn't change in a 6m to a 8m.

[Rogue Wave]

agreed but Biffers talking about a quality hull

[Adam 005]

Many manufacturers use a sliding transom system on larger moulds to select a particular length in thier range.