But you should only be using an stone axe to hollow out a tree trunk! ( not any of those new-fangled metal tools, or glue ) then there's no way to get to even 100kg!wee mcp wrote: I must begin by saying that I reckon that with the current build it will be absolutely impossible for me to get anywhere near the 50kgs.
First I haven’t got a vacuum pump at present
Dragonfly's internal structure... err.... there isn't any really.
and 43litre buoyancy bags - light, don't soak up water ( like blue foam does after a while )
To resist torsion, the carbon in the hull on both sides of the foam is at ±45°
Perhaps an extra glass or carbon layer on the outside would help prevent dents, this would add less than 2 kg.
I think the problem is that historically, the weight has been high, and so it's a bit of a shock having to be very weight conscious and seeing what you can leave out!