Now I've got a chance to upload my fail hydrofoil thing! Mercifully, small pics
I started off with a basic design of empty fuselage as floats and a jet as thrust. It worked OK for a speed of 14m/s.
However it tilted towards the nose a lot for reasons I wouldn't work out for a couple of hours because I'm a thickie:
But I did notice that with my wheels left on (they decoupled off for less drag... not sure if the game cares though), i would float higher in the water. Which might result in less drag if most of my floats are out of the water! So I experimented and addded more wheels and left them on.
Yup, it raised my boat out of the water.
Next I just whacked 3x the long girder under my boat and I had the first principle design of my boat done. Also I gave up with going 30m/s to the water with rover wheels and just used undercarriage and my jet to get to the water. This ended up my basic design on which to improve as it still listed to the front when accelerating.
I experimented with where the power was located, so moved it forward as I realised with sea planes, the power is usually not right at the back.
As you could see, i had added SRBs. Idea was to see what speed my girder ski things would break at. Result- they didn't. Also, looked badass. However, i was still leaning forward in the water.
At this point i actually gave it a bit of thought and realised that my power needed to be lower than my CoG in order to not pivot around the centre of my mass. So the HFE VI was born. It helped a bit when under power:
Then i just started experimenting a bit more and losing the plot. I got rid of my floats and just used girders, to have a very low centre of gravity. Also, just SRB power for some reason!
Didn't work out:
Finally, I reached a design that did kind of work. Very low mounted rear engines. No floats, just floaty girders (Because that's how science works).
Also looked badass.
It was good for exactly 14m/s. Exactly the same speed as my original design, 3h earlier.
Night well spent. You will not go to space today.