For my Engineering Diploma I have to do a project so I'm going to build a powerboat.
From looking at some photos I managed to draw up the bulkheads and make this model in ProEngineer. The cabin needs some more work.
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The bulkheads and keel were cut out using a laser cutter.
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Now have the stringers glued on and the hull mounted on the building board ready for the skins.
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1st skin is now glued in place.
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Today I glued on the second skin and used car body filler to fill and smooth the joint.
I have heard about coating wooden hull's in thinned epoxy, has anyone tried this before?
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Delux materials do Aeropoxy http://www.deluxematerials.com/download/WingSkinning.pdfhttp://www.deluxematerials.com/products_building.html
you need the lightest cloth they do, andif you make a squeegey out of some plasticard (old credit cards are the best) dont put to much on squeegey it dry, then do a second coat, if you use thick or put to much on you will have a lot of work and make the boat heavey, this methoud works very well, test a bit on sone scrap . after wetting you lay the thinnest cloth they sell on leave it big, you can tell its got enough epoxy as it goes transperant, to cut of excess just sand the edge when dry and toy get a clean cut, use sharp sissors whenpre cuting as it ladders.
Thanks for your help, once I have the hull finished and the deck on I will go for the cloth and epoxy, could do with the extra strength if I decide to put an engine in the boat.
All 6 skins are on, I used more filler and sanding to smooth the joints. The tape was stuck on to see what the hull will look like when the joints are finished.
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All 6 skins are on, I used more filler and sanding to smooth the joints. The tape was stuck on to see what the hull will look like when the joints are finished.
Today I got the hull of the building board. This was done by prising and smashing the bulkhead supports of the building board. I think the hull looks good and it only weighs 550 grams.
Next job is the boat stand.....
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Today I got the hull of the building board. This was done by prising and smashing the bulkhead supports of the building board. I think the hull looks good and it only weighs 550 grams.
Today I made the boat stand, used the trick of wrapping solder round the hull to get the shape then transferred it onto the wood and cut it out.
Also fitted the rudder, rudder servo and ESC.
The ESC is only 30A but will be fine for the graupner 600 plus it has LiPo cut off.
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You could be cutting it fine with only 30A.
What prop type, size and voltage are you tinking of?
My direct drive Speed 500 pulls 30+A with a 30mm two blade X prop on 12V.
I will be using a 35mm 2 blade prop on either 7.4V or 11.1V LiPO, I took this set up out of my Police Boat before converting it to brushless and it worked fine with no overheating problems. ESC was running about 45C.
I was thinking more along the lines of sealing it with primer (Project budget running low)
I've got the thin epoxy, can't remember the brand but the school have used it before for sealing wood, I experimented with it on my wood, works well. I did one thin coat, left it to dry, sanded, 2nd coat then sanded again. Then I sprayed it with Plastikote primer then went over that with 2 coats of fluorescent yellow and the finish was perfect.
Got the propshaft and motor in, it runs very smooth and quietly
I filled the front 2 sections with expanding foam so if the boat ends up upside down, full of water it should still float and I'll be able to rescue it.
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Got the propshaft and motor in, it runs very smooth and quietly
I filled the front 2 sections with expanding foam so if the boat ends up upside down, full of water it should still float and I'll be able to rescue it.
Today I used a CNC Miller to make the mould for the cabin. The cabin was designed In ProEngineer first and then milled.
The mould was milled from a dense foam material.
After milling the mould I used a vacuum former to make the cabin In clear polypropylene.
