max-ie Posted December 16, 2011 Share Posted December 16, 2011 On my way to work this morning I came across an articulated lorry that was stuck in the ice and snow. It was causing mayhem. I asked the driver if he wanted a tow. He smirked and said that won't pull this. Maximus was connected up. First gear and away he went. No problem. The driver couldn't believe it. He then told me his truck weighed just shy of fourty tonnes. I've no doubt that it wouldn't tow it without the assistance of his engine but it still felt good. Quote Link to comment Share on other sites More sharing options...
greenstream Posted December 16, 2011 Share Posted December 16, 2011 Oh yes its a great feeling ! The first time I did it, it was a stranded snowploug ! Same story - no way your gonna do it ! I just pushed him bumper to bumper - it was a need fit and of we vent ! The car I used was my 90" 3,9 EFI, named Maximus - how funny is that. M Quote Link to comment Share on other sites More sharing options...
Smego Posted December 16, 2011 Share Posted December 16, 2011 The rolling weigh is not much on the flat but don't try it on a steeper incline... I have pulled many lorry's Quote Link to comment Share on other sites More sharing options...
finnarne Posted December 16, 2011 Share Posted December 16, 2011 Did some pulling myself earlier this year A lorry bringing some toilets to a scout-camp got stuck in the mud. Attached my car to a tree, then rolle dout the winch cable, added a few more tow/tree straps, and pulled the lorry out of the mud. The driver mentioned something about 13.5 tonn Quote Link to comment Share on other sites More sharing options...
Orgasmic Farmer Posted December 16, 2011 Share Posted December 16, 2011 It is amazing how little force is needed to move a vehicle that has simply lost traction (rather than got bogged down/stuck) provided they still have drive. I have "pulled" 24 tonne concrete mixers up a 1 in 4 gravel hill with a quad bike on more than one occasion! Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted December 16, 2011 Share Posted December 16, 2011 Full tech on gradients, stuckness etc. calculations here: http://www.pirate4x4.com/tech/billavista/Recovery/index.html Surface resistance A pull of 1/10 LW will cause a free wheeling truck to move on a hard, level surface. A pull of 1/3 LW will cause a free wheeling truck to move on a softer surface, such as grass or gravel, Damage resistance: A pull of 2/3 LW will be required to move if the wheels cannot rotate (as if the brakes were fully applied), the pull required to overcome the resistance (drag) the truck id 2/3 or 67% of the LW. Damage resistance includes surface resistance (i.e. you only use one or the other) Stuck (mire) resistance: A pull of 100% of LW will be required if the truck is stuck to a depth of the sidewall on the tires. A pull of 200% of LW will be required if the truck is stuck to the hubs. A pull of 300% of LW will be required if the truck is stuck to the frame.. Mire resistance includes damage resistance (i.e. you only use one or the other) Grade (slope) resistance: Upgrade (vehicle has to be recovered up a slope or grade) 15 degrees - add 25% of LW 30 degrees - add 50% of LW 45 degrees - add 75% of LW Vehicle recovery on level ground - no correction Downgrade (vehicle has to be recovered down a slope or grade) 15 degrees - subtract 25% of LW 30 degrees - subtract 50% of LW 45 degrees - subtract 75% of LW Quote Link to comment Share on other sites More sharing options...
max-ie Posted December 16, 2011 Author Share Posted December 16, 2011 That's some technical stuff. I won't be making a habit of towing anything in future except for the caravan. I was late for work and he was struggling. Road blocked etc Leave recovery for the experts is my philosophy. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted December 16, 2011 Share Posted December 16, 2011 Short version: On the flat & firm you only need to pull 4 tonnes to move a 40 tonne HGV (EG snow/ice), which is the same force as recovering a defender bogged to the axles in mud. Quote Link to comment Share on other sites More sharing options...
Diablo Posted December 16, 2011 Share Posted December 16, 2011 Good reading that site... Quote Link to comment Share on other sites More sharing options...
simonr Posted December 16, 2011 Share Posted December 16, 2011 That's a great bit of info Fridge! Si Quote Link to comment Share on other sites More sharing options...
Davedef90 Posted December 16, 2011 Share Posted December 16, 2011 A bit bigger but a Challernger 2 tank wieghs 70T. But has a rolling resistence of 5T on flat ground. Just incase you find 1 that is stuck on a flat road Quote Link to comment Share on other sites More sharing options...
fozsug Posted December 17, 2011 Share Posted December 17, 2011 A bit bigger but a Challernger 2 tank wieghs 70T. But has a rolling resistence of 5T on flat ground. Just incase you find 1 that is stuck on a flat road :hysterical: Quote Link to comment Share on other sites More sharing options...
finnarne Posted December 17, 2011 Share Posted December 17, 2011 During Pomerania this year, my disco got really stuck twice. Both times I was down to the frame. I also had my Tow kit on. We had to use both my old Superwinch, and a friends Warn 8274, with a snatch block on both, Together with mud ladders. The next truck drove through on clean land Quote Link to comment Share on other sites More sharing options...
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