So I have to ask. Is this the way that has been argued back and forth as dangerous?
http://www.norwoodindustries.com/Libraries/Other_Misc/Img00032.sflb.ashx
In my opinion, it
IS dangerous, although I'm sure someone will tell me I'm dumb as a bag of hammers.
The reason I say it's dangerous is that the log is hanging down below the tractor differential, and the attachment point for the chain/tongs is high. What can happen is that the log butt can hook on a stump or under a deadfall or ledge as you drive forward. The high lifting point gives a lot of leverage, and can flip the tractor over backwards. In a perfect world you'll pull from a point below the tractor axle so any resistance pulls the front axle down, but it isn't always practical to do so. It's one of the reasons I don't like using tongs at all, because the log always hangs down quite a ways below the attachment point, wherever that might be. I hope that answers the OP's original question posed way back when.
With a proper logging winch, the log butt(s) are held against the back of the winch, well above the ground level. If the logs are limbed cleanly, there's little to catch and flip the tractor. You still have to be careful as he** going uphill since the weight of the tractor transfers back over the rear wheels more so than it does when on level ground. People tell me they cut and haul out whole trees, limbs and all with their winch. I think they're nuts, frankly.
It's my personal opinion that a farm tractor is a poor substitute for a proper skidder, but that's what we have to work with, so we do the best we can to make it as safe as possible.
I use a "frame" built similar to a winch frame to skid my logs out, usually over snow.
The attachment point is quite high, but the log butts are raised and protected behind the frame screen and can't hook into anything. 4 grab hooks welded to the top of the frame provide attachment points for chain chokers. Everything I cut and haul this way is limbed cleanly, period.
You back up to the logs, lower the 3 point and frame to the ground, hook the chokers, raise the 3 point and drive away. Reasonably slowly. If the tractor shows any tendency towards being too light on the front end, you drop a couple of logs to pick up on the next trip.
Anyone that wants to haul logs at 10 miles an hour through the woods should consider a log trailer. And life insurance.
Any operation involving heavy machinery brings an element of risk with it. What we can do is minimize the risk or at least understand it better. I've learned some things here from some experienced people, I've also learned that everyone has an opinion whether it has any basis in fact or not.
I guess my point is, think things through, watch how the old pros do it, and don't be afraid to ask THEM why they do it that way. Most loggers don't get old by being lucky.