Why do OcCre models start with the first plank partially down the hull?

[SiriusVoyager]

I have looked through some of the instructions on a few OcCre models. They all have the builder place the first plank part way down the hull. Why not start at the keel or the bulwark? Does anyone know what the rational for this is? 
 

[capnharv2]

I think it's to reduce errors in planking, and forcing odd plank shapes at the sheerline or keel. Larger vessels have 3-4 planking belts.

At least, that's how I think it goes. . . .

Your mileage may vary

 

Thanks,

 

Harvey

[allanyed]

Hi Eric

If the hull is going to be painted over or otherwise covered, it does not really matter. But if the planking is going to be uncovered look at the planking tutorials in the article database here at MSW and you will see instructions on starting with lining off the hull and then planking starting with the wales then working down to the garboard and up to the highest strakes.  https://thenrg.org/resources/Documents/articles/APrimerOnPlanking.pdf    There are differences in some kits' planking, including OcCre where they have planks that are not properly tapered so some of them do not end at the rabbet as they would in real practice (with the exception of a drop strake or stealer if needed.)   If you have not already seen them, these four videos are well worth watching as they give an alternative to spiling that works well  Part 1 --- https://www.youtube.com/watch?v=KCWooJ1o3cM

Allan

[SiriusVoyager]

22 hours ago, capnharv2 said:

I think it's to reduce errors in planking, and forcing odd plank shapes at the sheerline or keel. Larger vessels have 3-4 planking belts.

At least, that's how I think it goes. . . .

Your mileage may vary

 

Thanks,

 

Harvey

That probably makes the most sense. I sort of feel like that will just cause more planks to have to be corrected as it would be difficult to place that first plank exactly in the correct spot. 

 

7 hours ago, allanyed said:

Hi Eric

If the hull is going to be painted over or otherwise covered, it does not really matter. But if the planking is going to be uncovered look at the planking tutorials in the article database here at MSW and you will see instructions on starting with lining off the hull and then planking starting with the wales then working down to the garboard and up to the highest strakes.  https://thenrg.org/resources/Documents/articles/APrimerOnPlanking.pdf    There are differences in some kits' planking, including OcCre where they have planks that are not properly tapered so some of them do not end at the rabbet as they would in real practice (with the exception of a drop strake or stealer if needed.)   If you have not already seen them, these four videos are well worth watching as they give an alternative to spiling that works well  Part 1 --- https://www.youtube.com/watch?v=KCWooJ1o3cM

Allan

 

Thank you for those resources.  I have seen the videos, but the NRG document is helpful as well. That definitely seems like a better way to plank. I’m just not sure I understand why OcCre starts in the middle rather than at one of the edges.