Related to MAKE 17, Makeshift: Mountain Bike Rescue

MakeShift 17: Analysis, Commentary, and Winners

by Lee D. Zlotoff
June 30, 2009

OK, so your buddy’s gone off the side of the cliff and you need to get him back up to the trail, and then down the trail to your car for additional help. As we hoped and expected, nearly all of you figured using your bike was the best way to attack both those problems, so give yourself points for that, though we didn’t really expect the wide range of possibilities you all concocted for exactly how to pull that off (which led us to think bike makers might now want to promote their products as survival tools in addition to their transportation value).

Clearly, some dismantling of your bike was called for in an attempt to gain a mechanical advantage to hoist your friend up off the ledge. Your ideas ran from just removing a single wheel to practically tearing the entire bike apart, and while we were duly impressed with many of the really clever arrangements of ropes, wheels, frames, and pedals, a lot of them seemed so involved and complex that considerable — and possibly critical — time would be required to make them work, assuming all the variables lined up as one hoped they would.

So, for all the cool possibilities the bike offered in terms of pulleys, gears, and frames — including sending the whole frame itself over the cliff to winch your pal up — we kinda leaned toward your basic KISS approach; namely “keep it simple, stupid”. The less work and time you needed to spend arranging the bike, the sooner your pal would be up off the cliff and on his way out. Several of you suggested creating a counterweight to offset the additional weight of your friend and we thought that was good thinking. But adding yet another element to coordinate with the rope, wheels, frames, etc. — though it looks good on paper — might not be so easy to pull off in the field. So here again we thought less might be more.

As for harnesses to hold your friend in the hoist itself, most of you went with using one or more of the available inner tubes that could be easily slung under the arms, though a few suggested using your backpack itself as a harness with your buddy’s leg through the straps and we liked that too.

The majority seemed to think that the real challenge here was getting your friend back up off the cliff and that getting him down the trail itself back to the car or cellphone range was not really that much of a issue. We’re not so sure. Moving an injured person — who weighs well more than you — many miles along a rough mountain trail is not as easy as it sounds. Assuming your bike could be put back together in a reasonably short time, if at all, just “walking” your friend out on the bike would be tiring, difficult and potentially dangerous to you both since you’d need to constantly manage the weight and balance of your friend and hope the trail was always wide enough to accommodate all of you together. Not to mention the problem of having to move your friend on and off the bike whenever you needed to rest or catch your breath.

Though tempting to just use the bike as it is, we thought a simple wheelbarrow/travois arrangement using one of your bike wheels and pair of branches hung off your hips or shoulders, that could be alternately pushed or pulled depending on the terrain, might make for a safer and smoother way out for both of you.

So, collectively at least, we’re pleased to say you nailed this one, even if no one entry covered all the bases perfectly. And we’d be happy to go mountain biking with you anytime since, if it was our fanny hanging off that ledge, we know — one way or the other — you’d get us out of there.

Looking forward to read what you’ve got for us on the next one.

The winners of the MakeShift Volume 17 Challenge are:


Downloads & Extras

All the stuff you need to build the projects in MAKE, and exclusive online features direct from the staff of MAKE.

Volume 29»  Volume 28»  Volume 27»  

Connect with Make

 


Other Issues


Make: Volume 29 Cover Image Make: Volume 28 Cover Image Make: Volume 27 Cover Image Make: Volume 26 Cover Image Make: Volume 25 Cover Image Make: Volume 24 Cover Image Make: Volume 23 Cover Image Make: Volume 22 Cover Image

 


Current Discussions

Join the conversation - many MAKE articles have an online page that includes a place for discussion.

Zombie Attack! -- Zombie Survival Science Fair
Awesome, Ian! Can't wait to see what you come up with! ...

Zombie Attack! -- Zombie Survival Science Fair
Hi, Im Ian and I have been looking in all the make magazines I have for an idea for my grade 9 scien...

Solar Pendulum -- Solar pendulum
Hi Marc, The circuit is essentially just a switch which is triggered by the current induced when ...

Solar Pendulum -- Solar pendulum
Hi there, Nice project. Just a couple of questions about this circuit. I'm new to electronics...

The Luna Mod -- Minor typo in the schematic
Thanks for your sharp eyes! We just posted a corrected schematic above....

Make:Projects
A How-to Projects Community for Makers

Arduino
All You Need to Get Started with Arduino & More!