Very neat ideas with the drums, Mike.
About 50 yrs ago, a mixer truck rolled over on a 2-lane blacktop country
road west of here, and the drum, which I assume was loaded, was left in
the ditch, where it was gradually overgrown over many years. I assume
it may still be there.
Jim Nichols
Tullahoma, TN USA
On 2/20/2016 1:14 PM, Mike Lazzari wrote:
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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