Ermintruder
The greatest risk is to risk nothing at all...
- Joined
- Jul 13, 2013
- Messages
- 6,206
On one occasion, miles from anywhere we came across this old fella on a pushy, who had rigged a sail on his pushy and was trundling along quite nicely - I've never seen it since, but in this long flat land of ours, which has predictable winds, I could see how this sail thing could be a fairly good idea.
It appears that the one I saw was bigger and significantly-different from the commercial version https://en.wikipedia.org/wiki/Whike but, there's a key design fact within the wikipedia entry that, for me, makes the whole thing instantly safer, and I now understand how it works:
Activating the front brake releases the sail's spinlock, assuring there will be no more wind-propulsion.
So, the instant you hit the brakes (disk all round, incidently), the sail ceases to push your trike, and simply spins above your head like a fan. This is a seriously-clever design, well done, these Dutch biker-chaps! In fact, in a line of moving 'Whikes' on the road, the sight of a spinning sail at the front of a moving column of wind-bikers would be like seeing brakelights ahead of you.
This Dutch version also has a handbrake. They all have a low centre of gravity, so inherently non-tippy, plus as rynner says, triangular ice yachts are stable...ish.
I'm now totally-sold on the idea, if not literally the actual product.
@Peripart .... the risk you mention would apply mainly if the biker was waltzing