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[darrencuk]

Hi there
I'm looking at building a scratch build boat out of ply I have been having a look around b and Q r seeing some 6mm ply 5 layers I'm hoping this will be ok to do the job was wondering how u guys cut your ply would you be able to use a jigsaw with 6mm thick?

[Peter Fitness]

My jigsaw will cut timber more than 50mm thick, and it's just a simple Bosch, so 6mm is a breeze. I think most jigsaws will handle 6mm. I assume the 6mm ply is for the frames?

Peter.

[derekwarner]

Darren.........an electric  jigsaw will certainly cut your 6mm thick x 5 ply timber....but there are a few simple tricks

1. photo copy the frame profile x the number of frames
2. cut out & glue each progressively increased size/shaped paper frame template to the ply leaving just enough space between profiles......
3. select a suitable TPI [teeth per inch] jigsaw blade
4. MOST IMPORTANT is to adaquately secure the sheet of ply with G Clamps to a substantial table....& gently cut out each frame on the overhang.......& repositioning the sheet & clamps after each cut

Good luck........you will get there  ....... Derek

[MikeA]

what are you building, does it have anything to do with that jet you was talking about not long back?

[darrencuk]

Ok thanks guys, yeah the 6mm is for the frames and then I was going to use 2 or 3 mm for the outer skin, yeah I'm going to be building it for my jet drive to be fitted in it

[MikeA]

are you designing it yourself?

[Liverbudgie2]

Use spray on glue to attach the paper templates to the ply not water based glue as this will distort the paper, as I found out to my cost once.

LB

[darrencuk]

Yes I am mad mike my first atempt at scratch building and designing, liverbudgie thanks for the advice :)

[essex2visuvesi]

Use spray on glue to attach the paper templates to the ply not water based glue as this will distort the paper, as I found out to my cost once.

LB

The "Pritt stick" type glue is quite good too

[MikeA]

sounds exciting i love designing my own boats it seems not many people do it here they replicate full scale vessels (which in my oppinion is an art i cannt seem to grasp) have you got any plans i want to see  please of course

[darrencuk]

To be honest I haven't yet I have had so much trouble with wood and with actually getting my jet drive as they had to send me another one I brought some wood that was way to thin then when I got it home it was warped so decided to go thicker and 5 layer I don't want to make it to small but I don't want to make it to big I only have the mini jet so it can only run 540 sized motor but I don't no either to run brushless or brushed yet

[MikeA]

well my boats are bout 60 cm long. i use 1.5 for the outside and inside, in some areas i may back with balsa on the bulkheads but then i only have probably 2 bulkheads. Depending on what type of hull you are making i presume it will be a planing type and for the size motor and jet pump you have at a guess i would say 6 mm is too heavy. To get a fair amount of speed out of your boat it doesnt want to be anymore than 600 grams but thats without hardware and batteries. what have you got in mind for a hull type and size?

[darrencuk]

I really haven't really got any clue yet any advice would be help full tho :)

[LarryW]

HI DARREN
              6mm ply is OK    BUT   try to use laminated ply not the ply b&q sell its a core ply so tend de lament and splinter when cutting a scribe the out line with craft knife.
              a good timber supplier who good ply products should help you    theirs a few on , or in local yellow pages,
             here in my area i can get a sheet 8x4 for £26 NOT CHEAP  but the best also  a 4x4  sheet of 1mm  £ 22 a you get a lot of boats out of that,
              a cheaper way is to look out for shop fitters work shops and joinery firms they have loads  of bits and pieces i no i am a retired  joiner, .....LARRY.. 

[MikeA]

well if you take in mind what type of boat you want to build then go from there. Me personally would build one of these if i had a jet to hand:

http://www.nzjbrra.co.nz/

fairly simple hull, just needs some figures, a steering wheel, mock engine and bit of tubing.

[MikeA]

not to disagree with larry but which wood you choose depends on what type of boat your building. ive used this guy for 1.5mm lite ply:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140613793648