Hi there Shane
I am answering your question about diagonal planking in mahogany on this build thread. Bearing in mind this is the method that I used and it may be entirely different to anyone else's. As fullleatherjacket says, 'if it suits you then use it'.
The material I used was supplied by JoTika Limited. The mahogany planks were 5mm wide by 1/2mm thick.
The glue I use was EvoStick waterproof PVA. Also, very thin dressmaking pins. I roughly marked off, in the centre of the hull, the mid-section. Drew from the keel to the gunnel and in your case it will be from the keel to your chine edge and drew a 45 degree angle from the keel. The first plank was laid following this line I had marked on the hull and glued it and then held it in place with dressmaking pins. From that first plank, I worked 5 planks to the front of the boat and 5 planks to the back of the boat. That therefore gave me 11 planks in total.
I then turned the hull around and did exactly the same to this side (I repeated what I had done on one side to the other side).
When the 22 pieces of timber had dried, I went back to my first side which I had started at. I glued five more planks towards the bow, five more planks to the stern on that side - turned the hull around and repeated the process on the opposite side. By this time the glue had dried on the set of planks on the opposite side. Thus allowing me to carry on.
When I had finished planking the external planks, I light-sanded off to remove all hollows and bumps. One mistake I made, I should have filled in the small holes that some of the dressmaking pins leave. Because, when I epoxied the hull, I found my first coat would not penetrate/flow into the holes of the dressmaking - I had to staple hard the epoxy into the holes to fill them.
Ive included a couple of photographs which may give you some help.
If you need any more help, or you dont understand give a shout.
aye
john e
bluebird