'MIICROFICHE REFERENCE LIBRARY - Cd3wd.com

!< .,.3.05 - 3.063.05 Piled-Up Mud or Solid ObstaclesAnother obstacle caused by rmd is the retarding effect when thechassis of the car sinks deep enough to get hung up on the road surface.This is a special hazard for cars with small tires and, consequently, alowframe.I-. If there are no rocks or stumps in the mud, the inertia principledescribed in section 3.04 can be used to carry the car through the deepmud, or at least well into it.Asking the passengers to get out before a deep swamp will lightenthe load, and may help to avoid getting stuck. There is much to be said forthe universal driver's slogan, "Everybody get out and push!" Getting outdecreases the load and raises the frame of the car; pushing increases thetractive effort.If the other vehicles using the road are of similar size to your own,it is usually best to stay in the ruts on a very eddy road. The mud inthe ruts is likely to be packed somewhat by earlier passages.To avoid getting hung up, especially in a small cam, it may be betterto'get off the mad altogether under soma c' 3rcumstances.Avoiding getting stuck in deep snow may be somewhat different. Oftenthe snow is piled higher than the hood of the cm, so that the problem isnot mrely one of getting hung up on the clmssis. It becomes necessary topush the car into the snm, and traction may not be adequate. The snow mustbe removed in such a case. This is usually done with a plow or blowermounted on the front of the vehicle.In snow less than two feet (l/2 mzter) deep, the principles used fordriving in md apply.Avoiding getting hung up on mcks, stumps, and other solid obstaclesis more ama-tter of juagmerrt. thanpawer. Usually such obstacles are largeenough to prevent passage, and one cannot simply push through withoutdamaging the car. Keepingthecarmving,then,mans going around suchobstacles if the car cannot pass freely over them. If there is any doubt,it is always best to get out and check.3.Q6 Log BridgesR&ably the most commn type of bridge on a frontier road consistsof parallel logs laid across the stream. Generally there me three logs.One i.s on one side of the bridge, and two are on the other. The cokinationof the single log on one side and the inner of the double logs isarranged to fit the smallest vehicle likely to use the mad, and the outerlog will then accomdate larger vehicles.Avoiding getting stuck on such a bridge is largely a matter ofgetting lined up stmight before starting across. Wle experience Roydh? SOme &iyerS to charge across without slowing dm, the novice willdo better.to stop and check,first. By sighting along the line of the logsit till bepossible to determine whether the tires are properly lined up.%JW drivers'carry'a piece of string for lining up bridges. The string is