Quote Originally Posted by Chad Morgan View Post
The plans for the whippet offer a couple of different ways to do the cockpit sides. Okume is specified for the ply due to weight. A recent discussion with Don reveals a new idea for the bottom that he is having luck with which I may use those ideas. I will be using our Australian Bote cote epoxy system as It was great to work with in my last build.

Don questioned me about me mentioning the standard 2 blade prop and said that wouldnt be competitive where he is so I may have to re check those rules for over here. I thought I read the yamato has to be bog stock but cupping stock prop is allowed. I will double check the rules.

I cant help but wonder about the use of Paulownia timbers and if anyone is using it for boats? Maybe its not suitable but It sure is light weight.

My nearest boat club is hundreds of km away so talking with others about racing/building is a bit hard.
Here in the US the prop shafts are reduced to 9/16" and shear pin moved closer to prop nut so more available props can be used like 3 blade over the low performing Japan 2 blade. Check rules in Aus racing if that is your goal with boat.

Paulownia wood is used in some types of boat construction and it is light weight, not sure about use in race boats. The race boat builds and repairs on frame structure I use clear straight grain white spruce free of knots but real small one ok to work around, never had structural issues, well done carpentry and joining a must, it is a stronger wood than Paulownia but a bit heavier and not really an issue with build weight control.

Some use Sitka spruce - great wood greater strength parameters than all mentioned here, about same weight as white spruce, straight grain no knots could be hard to get and $$$.

Consider the white spruce over the Paulownia

Here are specs of the Paulownia, white Spruce and Sitka spruce:

https://www.wood-database.com/paulownia/

https://www.wood-database.com/white-spruce/

https://www.wood-database.com/sitka-spruce/