XC-Sjælland

Wirecut and inlet

 

Blog: Build your own Hangglider and Paraglider Winch

Choice of wire

Don’t use cheap chineese wires, for more than one reason:
– A cheap wire is not compact and it requires more volume of wire on the drum, which increases the risk of “wire jam”.
– The lifetime is better with quality wire.
– It is easy to spice, you can use a piece of welding wire a slicing tool.
– Requires more power from the sled stepper motor

– Generates more drag in the air, which means less altitude

 

Use Liros DC500.

It is a quality wire, which costs around 500-600€ for 1000m.

 

We have tried the even thinner Liros DC Pro that is only Ø1.6mm, and it is still easy to splice it with the right tool.

For this just bend a piece welding wire, then you have the perfect tool.

Design of wirecutter

The idea behind this construction was to make a wirecutter that could be actuated by an electrical input.

In the end, it became a very effective solution. When the wirecutter is activated the blade will angled two time 45° to the wire, which will make the wire cut it self by pulling the wire with a force lower than 0.5kg.

 

The actuator is a 12V solonoid that gets 24V for few seconds, when the wirecutter is activated.

Design of wire inlet

The wire inlet is made out of two pillow block bearings, some roller skate bearings, Ø22 aluminium pipe, and the same Ø73 pulley wheels as for the sled.