Possibly the most boring video on Youtube – so please don’t watch and then moan about it afterwards!
This shows a pair of electric trestles I’ve built to help rig gliders (sailplanes). Each trestle is remote controlled, I can use them to set the wings to the correct level before putting the main pins in.
The trestles were assembled from off-the-shelf items. The basic trestle come from IMI Gliding ([ Ссылка ]) and costs about 110 euros, the electric linear actuators are an ebay purchase from eco worthy and cost about £60, the remote control is homemade using this transmitter [ Ссылка ] and this receiver [ Ссылка ] .
Each trestle weighs about 4kgs. Both the trestles started off the same height but I trimmed down the left hand trestle to help rig low-winged aircraft. The electric actuators have a lifting capacity (allegedly!) of 150kgs but they do move pretty slowly, although in practice that’s not a problem. The trestles operate off 12 volts, currently I use a set of 10 NiMh AA cells on each trestle, but the battery pack is larger than I need – in practice I rarely operate for more than 20-40 seconds each time I rig so there’s no need for more than ½ ampere hour capacity. I’ll probably change to LiPos next time I make any changes. Each trestle is slightly different, no particular reason, just experimenting with different designs. The left hand trestle extends from 67 cm to 107 The right hand from 84 to 114.
