The Porsche 911 was
down to its chassis in a Jumeirah sandlot and was minutes away from
being torn apart, fortunately I arrived just in time to stop the well
meaning, but clueless, rescuer from attempting to drag the sports car out (and to pieces) with his 4x4. Even from a distance the recovery set up just did not look right and on
closer inspection I saw that the strap had been looped around bits of
the rear suspension. It was also a static strap with no give. One tug
and the Porsche would be expensive spare parts. Within a few minutes I'd reset
everything, using the proper Porsche towing eye, a dynamic recovery
strap, correct shackles and, with very judicious use of the
accelerator pedal, eased the 911 slowly from its sand trap. Recovery
skills are not only for the desert, I've done similar recoveries on
the beach, as the photo at the top attests, and even in front of a shopping mall.
Having seen far to
many botched, damaging or just plain dangerous recovery attempts over
the past few years I thought an article on choosing and correctly
using recovery straps was long overdue. Just yesterday I witnessed a
guy pulling a car free on Sufouh Beach and, although his technique
was acceptable, the strap he was using was the wrong type and he
failed to communicate what he was doing with the stuck driver and so
used far more force than was necessary (and coming close to damaging
he rescued cars steering.) Recovering a stuck vehicle starts with
buying the proper equipment, not just whatever you find at the
hardware store, and then knowing how to use it properly. Even my
teenage son knows the drill and has assisted other drivers in
rescuing vehicles, much to their macho-image detriment, but at least
no cars have been ruined and no-one has been injured.
What's a snatch
strap?
Recovery straps.
Snatch Straps. Kinetic Ropes. Tug-ems. They go by a variety of
different names, most are some form of webbing while some are braided
ropes, for simplicity I'll use 'strap' for both types. A recovery
strap and a tow rope are two vastly different things, even thought
they look the same to the uninformed, all proper recovery straps have
the following in common: Firstly they are dynamic, not static,
which means that the strap is designed to stretch, not only does this
cushion the impact of the pull but it stores kinetic energy in the
strap, more on this critical property later. Secondly they have loops
at both ends that are either sewn or, in the case of some braided
ropes, spliced; they DO NOT have big steel hooks permanently sewn
into the ends, avoid these at all costs as they are a fatality
waiting to happen. Good recovery straps are not cheap, my main strap
(I also carry a spare) cost me AED500 a few years ago and has been
worth every Fil. It always amazes me that newbie off-roaders will
spend tens of thousands of Dirhams on their cars but will buy the
cheapest recovery gear they can find, risking serious damage to the
same expensive car or injury, even death, to themselves or
bystanders.
You can buy decent recovery straps from most good 4x4
suppliers and some hardware stores but don't expect the salesperson to know what they are talking about, very few do. Look for gear
marked for 'recovery' (not towing) and that indicates the strap is
designed to stretch. If in doubt stick with well known brands like
WARN, Bushranger and SecureTech amongst others. Some strap sets have
both a recovery strap and a tow strap in the same bag but a tow strap
is NOT a recovery strap as it does not stretch, so if you buy a
combined set make sure you know which is which and use the correct
strap for the job. Snatch straps should not be used for towing any
more than tow straps should be used for recovery. Some hardware
stores sell slings that are designed for static loads, these are not
suitable for recovery as they do not have the stretch of dynamic
webbing, using these means it's a matter of time before you break
something (or someone.)
The 3 straps to the left are for lifting or towing and are not suitable for recovery. The two on the right are proper kinetic straps with plenty of stretch and rebound. |
Shackles,
shmackles ... aren't they all the same?
Along with a good
quality dynamic strap you will need some Bow-shackles. To be precise,
you will need rated shackles, not just any old ones you bought
off the shelf. Rated shackles come with a working load limit (WLL)
stamped or raised on them, common ones in the UAE are 3.25t and 4.75t
shackles. I'd recommend a minimum of 3.25t for most off-road use. The
pin of the shackle should be the screw-in type, avoid the stainless
steel shackles with a simple push-through pin. Firstly they are not
rated and secondly the angle at which you sometimes need to pull can
severely distort, even break, the shackle. The impact of a highly
tensioned cheap shackle breaking under the load generated by a 2.5
ton vehicle trying to free another 2.5 ton vehicle is scary.
In general you will need two shackles, one for each end of the strap. Some vehicles have a recovery hook bolted to the chassis but most vehicles, especially the Japanese ones, have a recovery eye underneath. Make sure your shackles will fit through the recovery points before venturing off-road, the older Jeep Wranglers have a very small recovery loop on the front bumper and I've come across more than one stuck in the desert with gear that didn't fit the vehicle. I now carry multiple sizes of shackle to ensure I can cover any vehicle that needs rescuing.
A pair of rated recovery shackles, the orange day-glo paint is my addition, in case I drop the shackle it makes finding it in sand a lot easier. |
In general you will need two shackles, one for each end of the strap. Some vehicles have a recovery hook bolted to the chassis but most vehicles, especially the Japanese ones, have a recovery eye underneath. Make sure your shackles will fit through the recovery points before venturing off-road, the older Jeep Wranglers have a very small recovery loop on the front bumper and I've come across more than one stuck in the desert with gear that didn't fit the vehicle. I now carry multiple sizes of shackle to ensure I can cover any vehicle that needs rescuing.
So, I just tie
them together and tow? Right?
Even the best
drivers get stuck now and then, if you don't get stuck you're not
trying hard enough. Being able to do a snatch recovery is a basic and
effective, but often misunderstood, technique and one that requires
practice. As a start, as the name implies this is a snatch and not a
tow. Actually, I think the term 'tug' is a better description, snatch
implies far more force and speed than is generally necessary, but
snatch is the commonly used term. I once ventured out with a friend
who had some off-road experience and I assumed, to our detriment,
that he knew how to do a snatch. I managed to get my vehicle stuck in
a tricky situation and set up the straps in text-book fashion as
described below, expecting an easy recovery. Unfortunately my friend
tried to tow me out and kept spinning his wheels, digging himself in.
By the time I realised what he'd done both cars were stuck and joined
by highly tensioned webbing. It took some careful work, a lot of
sweat and steady nerves to sort it all out.
The basic technique
is that the strap is set up between the stuck and rescue vehicles
with a fair amount of slack. The rescue vehicle then pulls off at a
moderate pace until the strap stretches taught, storing kinetic
energy, it then contracts and it's the strap, rather than the towing
vehicle, that pulls the stuck car free. This is why you need a
stretchy, dynamic strap so there is no sudden hard jerk to wrench
bits of vehicle free and to store kinetic energy, the stretch and
subsequent contraction should do the work. If you pull too hard or
use a static strap you risk snapping the strap or breaking something
on the car. If you ever use steel cable you should be held down and
severely beaten with it, imagine a steel cable snapping and flailing
through a group of bystanders, especially kids.
This is the routine
I have used successfully for many years :
- Assess: Firstly, check if the car is really stuck. Perhaps they need to lower tyre pressures a bit more to simply drive out. Often a good push will suffice. With vehicles stuck on a ridge, digging sand away from the chassis may be enough to allow it to drive out on it's own. If snatching is required take some time to assess the situation and determine the best direction to do the recovery. Take into account slopes, churned up tracks, soft patches and the length of strap available. Sometimes it's easier to pull the vehicle backwards, other times it might be easier to go forwards. Also consider if you, the driver, will be better off going forward or reversing.
- Clear: The stuck vehicle will have dug up a lot of sand, push away as much as possible in the direction of pull making a gentle ramp for the wheels. On heavily stuck vehicles also clear any sand from in front of the chassis cross-beams, axles and differential housings. Reducing drag makes recovery easier and safer.
- Attach: Attach the shackles to the recovery points on both vehicles. Do not simply use the tow hitch or the bumper, the forces generated could tear it loose. Always use the recovery point that is fixed to the chassis. Don't over tighten the screw pin, just finger tight. The tug will cause the pin to tighten anyway and make it difficult to remove afterwards, so don't make matters worse. Because one rarely has the luxury of doing a straight-line pull I tend to put the round part of the shackle through the recovery eye and the strap around the pin, this allows the shackle to swivel in the direction of pull. If the pin is put through the eye then it will slip until the ring is in one of the corners where the pin passes through the shackle. The strap will move to the side of the ring opposite this and you'll have a transverse load that can deform the the shackle (even if it's imperceptible to the eye.) This deformation is why it can be very difficult to remove the pin after a recovery*. Smaller recovery points that don't allow the shackle to pass through might force you to do it pin first, some of the stock recovery eyes on Jeep Wranglers seem to be too small to pass a shackle through.
- Layout: You need a bit of a run-up to build momentum, so there should be slack in the strap. A good technique is to lay the strap in a zig-zag pattern between the vehicles. This allows you to see if the strap has passed through itself which would result in a disastrous knot when doing the snatch. Knots severely weaken the strap and in a hard tug can sever the strap immediately, I had this happen once while crossing the Wahaiba Sands in Oman and is why I always use the zig zag technique and always carry a spare strap. The remains of the snapped strap hang from a tree in our garden as a swing for my kids and a reminder to me to properly supervise a recovery. To prevent broken recovery points from whipping about and sending a lump of steel through a windscreen or person, cover with a tarp or blanket to act as a damper.
The strap is laid in a zig zag and covered with something to dampen its speed should something break. - Communicate: Now, don't just jump into the vehicle and speed off. First have a chat with the person being rescued and explain what you plan to do, how far you intend pulling them, the direction to go and that they must ensure their front wheels are aligned with the pull. Make it clear that they are expected to help by driving out, but without spinning their wheels. Explain any hand signals you will use (being in different cars you won't be able to hear each other.) My hand signals are simple: Thumbs up for 'Ready' (and they must acknowledge) and a closed fist for 'Stop'. If you cannot see each other clearly, arrange for a passenger to stand at a distance and relay the signals. Tell your recoveree that if they drive over the strap after being freed that you'll push them back in the hole and leave them there. No, seriously, tell them.
- Away: Chase all gawkers and bystanders far away. Children are especially curious and so very vulnerable, make sure all spectators are at least two strap lengths away from the recovery and off to one side. Never let anyone stand between the vehicles during the pull. Remember, two vehicles exerting a combined weight of a few tons can send a detached shackle through a crowd of people without stopping, even a strap on its own could be lethal to a child. Keep them far away. On some heavy recoveries I've even raised the hood so that any flying projectiles will strike it first rather than pierce a windscreen and the driver.
- Recover: Now it's time to do the actual snatch: The stuck vehicle signals that it is ready and is in the appropriate gear depending on if it's to go backwards or forwards. The rescuer drives off at a moderate pace, building momentum. Don't be hasty, a couple of firm tugs is more effective and a lot safer than one almighty jerk. You should feel a gentle tug as the strap tightens, carry on driving for a few metres and then put on the brakes. DO NOT spin your wheels and try to tow the other car out, all you'll do is dig yourself in and then two vehicles will need recovery. After a few seconds you'll feel the strap contract and hopefully the other vehicle will be firmly but gently pulled from its resting place. If the first tug doesn't do it, go back again without driving over the strap, make sure there are no obstructions that you missed the first time and repeat with a bit more gusto, but just a bit mind you. Sometimes it takes more than one pull but avoid repeated, heavy jerks as this weakens the strap (it's not a tow rope, remember.). Once the car is free keep driving to the pre-arranged firm spot. You might need some pliers to loosen the shackle pin, even if it was only finger tight in the first place.
My strap is all
dirty, what now?
Even the best
quality straps have a limited lifetime, some manufacturers only
reckon 10 or so recoveries. In my experience having good technique
increases the number of pulls you can get out of strap while poor
technique can destroy it in one go. Don't walk, stand or drive over a
strap as it forces small sand particles into the fibers and weakens
it. If people are getting stuck repeatedly it's a good idea to
alternate with your spare strap, the dynamic nature of straps mean
they need a rest period to return to their original length and
strength. Muddy straps, or those used in salt water, should be washed
with fresh water and left to dry in the shade, avoid leaving them
lying around in sunlight or packing them away wet. Store them
carefully, some come in a strong canvas bag but I made a dedicated
recovery box that is permanently in my 'Cruiser.
The recovery procedure sounds a lot
more involved than it is, most of these steps are just common sense.
I'd rather do a bit of prep work and have an easy pull then struggle or worse, get my own vehicle stuck.
If you've never done a snatch before I strongly recommend doing a few
practice runs with a friend before venturing far off-road. And
please, open that wallet and buy some quality kinetic straps and
proper rated shackles. It's cheaper and safer in the long run.
*My view on proper orientation of the shackle, strap and recovery eye is based on experience and having done some reading on industrial rigging. If there are riggers who disagree with this approach I'd be happy to hear from you and make any corrections.
*My view on proper orientation of the shackle, strap and recovery eye is based on experience and having done some reading on industrial rigging. If there are riggers who disagree with this approach I'd be happy to hear from you and make any corrections.
sunburnt ... and in need of a shave