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nzjetboating.com Forums => Tech Library => Hulls => Topic started by: maggotman on September 11, 2016, 08:13:02 AM

Title: building a hull without plans
Post by: maggotman on September 11, 2016, 08:13:02 AM
i have seen boats built guys cutting the parts by hand skill saw etc how are pepole marking out the curves for the fron section the rear 2/3 of the boat is simple just straight lines angles etc
Title: Re: building a hull without plans
Post by: mohawk on September 11, 2016, 08:27:13 AM
make a cardborad or paper model , when your happy draw a grid on it and scale it up... eeezy peeezy
Title: Re: building a hull without plans
Post by: maggotman on September 11, 2016, 09:46:17 AM
this is what i have been doing it all goes well till i get to the front i am looking to put a diesel engine in along with a pp65 jet unit i have a dateline jet boat that is 4.6m long an curently getting 30 to 40mph depending on load  i am have had enough repairing the fiberglass from rocks etc the engine only needs 800mm from the transom as the pump hangs out the back i am thinking 3.4 metres long with a shallow deadrize i expect the engine and pump to be around the 180kg mark ?
Title: Re: building a hull without plans
Post by: LBD on September 21, 2016, 22:58:51 PM
Not pretty... completely different... never been done before... and lofted up in my minds eye....

http://www.nzjetboating.com/yabbse/index.php?topic=29895.0

So you can do it or you could say, "if that is the outcome, then I think I may need to invest in a set of plans....." scr
Title: Re: building a hull without plans
Post by: maggotman on September 23, 2016, 07:35:09 AM
i think i am better off investing in plans looking at that its anot its just the front part i cant get right trying to work out the dimentions of he reverse chine up to the bow are next to imposible on paper / card i want somting like a 80mm reverse chine but scaling it on paper is like 8mm
Title: Re: building a hull without plans
Post by: Jeff B on September 23, 2016, 10:27:18 AM
You don't have to scale it at 10:1? I know of people making full size models from MDF.
I have built a heap of boats without plans, scale models, straight edges, laser levels are all used.
It takes a heap of time.