Using a Directional to Lift a Bike

[redneckdan]

Lets do a cheap ass 9:1, just the haul system. This would be a stacked z-rig, a 3:1 pulling on a 3:1


100' 4mm static- $20, cheaper if you use 550 cord
4 Carabiners- $20 if yo go with climb spec ebay preowned

And that is it. Realistically friction losses on the carabiners cut this 9:1 down to about 6 or 7:1 Stacking the z rigs usually requires rope grabs, instead of a grab or prussik use a slip loop in the rope. More of a pain to re-position but cheap and light. If you want to be a big spender pay another $4 each for 4 of the petzel UHMW 'biner pulleys. The 4 'biners could be used for clipping camping stuff together and the rope used to tie stuff to the bike when not needed for hauling.

[fast*st]

I used much the same, I found 2 small double sheave pulleys to get a 4:1 ma. I also had a really nice and sharp plumb camp axe for making an improvised ground anchor, An additional sheave could be whipped up using one of the biners that are tied in with the rope. Also had one larger sheave pulley and a quick french prussik, think rope ratchet. Luckily, I've not had to apply it in the wilderness. Though did use a birch sapling and stainless tie wire to shore up a bent rear subframe.

[Robert^]

Can you document a technique to use when natural anchors aren't handy. For instance, is it possible to push someone else's bike over and use it as an anchor? Since the pull needs to be directional, I think it would be great to make sure the other bike is in the proper location before it is pushed over.

Originally Posted by redneckdan

Any questions?

[Twilight Error]

Originally Posted by Robert^

Can you document a technique to use when natural anchors aren't handy. For instance, is it possible to push someone else's bike over and use it as an anchor? Since the pull needs to be directional, I think it would be great to make sure the other bike is in the proper location before it is pushed over.

I think I would employ the owner of that other bike to help lift before I used the bike as an anchor.

[zeeede]

Originally Posted by Twilight Error

I think I would employ the owner of that other bike to help lift before I used the bike as an anchor.

That would make way too much sense.

[jon_l]

Redneckdan - good info. Z drag is useful to know. Many people are focusing on your example, rather than what they could learn from it.

Multiplying the force lets you move heavy sh*t. One doesn't need expensive climbing gear, just a couple carabiners or pulleys and some rope.

Thanks for posting.

[ianbh]

Check these videos out, bike wasn't flat though. Ian, Iowa

http://www.youtube.com/watch?v=I5k4U...eature=related

http://www.youtube.com/watch?v=-8Er4...eature=related

[jestre]

Originally Posted by ianbh

Check these videos out, bike wasn't flat though. Ian, Iowa

http://www.youtube.com/watch?v=I5k4U...eature=related

http://www.youtube.com/watch?v=-8Er4...eature=related

Those go along with my first thought. grab left side of bar, pull to bike, pull backwards.

[zap2504]

This Sporty was:http://www.youtube.com/watch?v=k4MPy...eature=related
Works the same way. If this looks like too much work I would carry a cheap "come-along" with a steel cable.

[ben2go]

I have used two 15 foot one inch ratchet straps from NIT.They have a 1200lb working load capacity,IIRC.They roll up into a ball about the size of a soft ball.I carry then just in case I need a repair ride.I run one from the side that's on the ground to a tree or solid object on the other side of the bike.If I need more length,I use the second strap.It rolls the bike upright far enough I can finish standing it up and securing it from another dirt nap.

1 inch 15 foot Rachet Straps

[Mike Ryder]

If you have a small shovel you can dig holes or a trench for the wheels then the lifting part is easy, you will be warmer and slightly stuck.
Not sayin the z drag is a bad thing just that there are options.
If I had a stick strong enough for a directional I would just tie it to the
Bike and use it has a handle/lever.

[redneckdan]

Originally Posted by Robert^

Can you document a technique to use when natural anchors aren't handy. For instance, is it possible to push someone else's bike over and use it as an anchor? Since the pull needs to be directional, I think it would be great to make sure the other bike is in the proper location before it is pushed over.

I'll put that on my list of stuff to do.

If you are trying to lift another bike I would say take the 2nd bike, put it on the side stand, then have your buddy lean agaist the bike in the direction of the side stand. Hook low on the 2nd bike, on the side opposite the side stand. The net effect is your buddy is using the body of the bike as a lever and his force/bike weight as the force counteracting the pull from the haul system. This would function kind of like the old shovel trick 4wd guys sometimes use for a winch anchor.

If you are trying to haul another bike out of a ravine or some such thing, i would imagine the best bet would be the sand filled saddle bags I had mentioned earlier. I would think a bike would tend to slide on anything except fairly deep sand. Experimentation will tell though.

If you have small shrubs or tall grass round that will work too. Use 550 cord and make a slip loop in each end. Grab a hank of grass, slip the loop over and tighten, repeat with the other end. Make 2 or 3 of these anchors then network them together. They are surprisingly strong.

[garandman]

Man you guys are fancy. I buy tubular nylon strap, and 2 or more anchor shackles, available at Lowes, HD, WalMart etc. I keep it all in a ziplock bag. Used it twice. Example setup. More shackles = more purchase, more line required.

[Plaka]

Originally Posted by Robert^

Can you document a technique to use when natural anchors aren't handy. For instance, is it possible to push someone else's bike over and use it as an anchor? Since the pull needs to be directional, I think it would be great to make sure the other bike is in the proper location before it is pushed over.

Suppose no other bike and no other anchor?

Take wheel off crippled bike. Bury it. use as anchor. Lotta digging but a decent entrenching tool can make short work of it. if you hit a lot of rocks then you use them as an anchor.