Black Diamond Ice Screws |
For remote flying in Alaska - which includes rural airports, private strips, and landing on frozen lakes and rivers, prudent pilots create means for tying down a plane to protect it from sudden wind gusts with quick release for departure. We use the three methods described below: for tie downs elsewhere, we stow ice screws and rope in the plane. For the tie down on the frozen lake at home, we shove boards through holes in the lake, and for easy and fast departures, we park the plane's skis on slick covered planks.
Ice screw |
In our plane, we keep a 75 foot length of heavy duty nylon rope and three ice screws, which are really designed for ice climbing. Made of aluminum with a steel tip to shed weight but remain strong, they weigh less than one pound each. Ours are about 8 inches long. We paid about $55 each.
https://blog.weighmyrack.com/black-diamond-ultralight-ice-screws/
Once he has taxied to a stop, Bryan picks three points (under the U brackets on the wings for tie downs and near the tail), hand turns the screws (easily) into the snow and ice and then lashes the plane to these anchor points with the rope.
He has done this at transient parking spots, for example, at Willow Airport (in Alaska) that lack permanent tie downs, as well as off-airport locations.
plane plugged in and tethered with ice screws |
NOTE: These screws are not appropriate for mud or soil.
We received this excellent tip from long time flyers, George and Dorothea Murphy, who used ice screws over decades of Alaska bush flying.
SUBMERGED BOARDS:
A second tie down is one we use all winter at home. Here, Bryan uses our 8 inch diameter ice auger to cut two holes through several feet of ice on either side of where we plan to park the plane. Into each of the open holes, we drop a board through which a thick nylon rope has been looped and knotted. We poke and prod the board until it pops horizontally beneath the ice. When the ice hole freezes solid, the rope is locked in place until spring. We thread the above surface lines through a pair of orange traffic cones set over the holes, so they are easy to find after snow storms. We learned this useful technique from Larry Schachle. In May, the lake ice breaks up and the boards float to the surface. We retrieve them by kayak.