comments about cement trucks: (applies to our local trucks)
-I think a major benefit of the front facing design is that the trucks
carry more payload. Look at those auxiliary wheels. With the typical
rear design the more cement in the drum the farther back the center of
gravity. We already lose a truck or two to the ditch on our rough roads.
And there are hardened chunks of cement on the steep uphill sections of
road. Slop over from over-full drums. Typical load is 6-8yds. Maybe
pushing ten max.
-The design may facilitate working with a pumper on a large pour too.
(or may not)
-The larger size/weight of the front facing design just isn't feasible
in our area. Getting into narrow winding drives is already hard enough.
Drivers don't have a problem backing long distances up to 1/2mi/1km.
-the drum rotates independently from the feed screw. That way it is
possible to adjust the consistency of the mix independently from the
feed. Note the dark band on the drum where the guide wheels roll.
-the driver is usually able to operate the feed and the chute either
from the cab (with a spotter) and/or from the back. Depends upon the rig.
-The drum rotation is not reversed to start the feed. The agitator fins
are attached to the drum. The feed screw is independent and variable of
course. They are often adjusted independently.
-here's what a friend of mine does with the discarded drums etc...
<http://www.interisland.net/watershed/mike/WalkDogs/Aug15/strawberry_30018.JPG>
<http://www.interisland.net/watershed/mike/WalkDogs/Jun15/YellowSub_30009.JPG>
<http://www.interisland.net/watershed/mike/WalkDogs/Jun15/Pinapple_30007.JPG>
Mike
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