A little face protection is a great idea when first testing out your homemade bow. [Austin Karls] made this recurve bow during what he calls an engineer’s Spring break.
He settled on the idea after seeing a few other projects like it on Reddit. After first drawing up a plan he headed down to the shop to cut out the wooden riser (the middle part of a bow). Unlike traditional recurve bows this is made up of three parts. Traditionally you would laminate different types of wood to achieve the flexibility and tension levels desired. But [Austin] went with a synthetic material: the tips of two skis. Each were cut to the final length and affixed to the riser with a pair of bolts.
After a few test shots he gained confidence in the design and did away with the face mask. Now if you’re in the market to take your existing bow and add some firepower to it you’ll want to look in on this shotgun enhanced compound bow.
If you own a cabin in the mountains of British Columbia what do you do during the warmer summer months? Well, we’d probably mix of a cocktail and string up a hammock, but [Darrin] is quite a bit more motivated. He planned for the snowy season by building his own ski lift. He shared the details in a forum post, but you’re going to have to register and wait for approval before you can view that thread. Perhaps you’ll want to look at the video after the break before making that kind of commitment. Normally we would just pass over projects that require a login to view, but this one deserves the attention.
The setup is essentially a very steep tow rope. 1600 feet of 1/8″ aircraft cable covers an 800 foot span of his property. Apparently he’s got a total of 1000 feet of vertical drop but the lift doesn’t cover the whole area quite yet. That 6.5 horsepower Honda engine drives the cable loop, with the pulley system seen above used as an RPM reducer. Each skier can hook onto the cable used the nylon rope with a ski-pole spacer and a hook. The RC vehicle remote control works as a dead man’s switch, starting the lift slowly when the throttle is depressed and stopping it when released.
Normally we like to link to similar projects, but so far this is the only ski lift we’ve covered. You’ll have to settle for this ski-pole mounted POV display.
Continue reading “Backyard ski lift”
[Powder4u] wanted to make a persistence of vision display for his bicycle but with 50 cm of snow on the ground it’s hard to get out and ride right now. Instead he made this persistence of vision ski-pole accessory. We asked him to share some details and he obliged. It’s made using an Arduino compatible ATmega168, LEDs with resistors, and installed on some protoboard. The enclosure is a clear pencil case, which isn’t water tight but he’s tried to bolster that with some creative scotch tape placement. There’s no sensor to detect which direction the board is moving in so displaying alpha-numeric messages will have some issues, but as you can see he managed to display image data without issue.
We’re used to night skiing with floodlights along the slopes. This would be a fun little thing to have along with you on those dark lift rides.