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From YouTube: Bulldozer - basic theory by Open Source Ecology
Description
Visit our WIKI: http://opensourceecology.org/wiki/Bulldozer
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A
So
here's
an
overview
of
the
bulldozer
documented,
so
it's
a
google
doc
Google
presentation
that
can
be
collaboratively
edited
in
it.
We
show
the
plan
of
what
we've
done.
It's
a
working
document
that
we
continue
as
as
we
go
forward,
we
try
to
keep
things
in
in
a
scrum
fashion,
using
scrum
II,
we've
so
far
built
the
micro
tractor
with
tracks
and
we're
scaling
that
up
to
a
much
larger
size.
So
you
can
see
how
that
that
looks.
A
Power
cubes
side
by
side
and
then
a
third
one
behind
so
to
individual
micro
tracks,
not
the
wider
track
module.
Like
you
see
here,
we've
explored
these
different
options.
We
considered
how
what
happens
if
you
just
take
the
micro
tractor
and
put
them
together
what,
if
you
take
the
tracks
and
make
them
wider
or
elongate
the
tracks,
but
figured
that
if
you
use
the
micro
track
itself
as
the
base
building
block,
then
simply
putting
multiple
units
of
that
together.
A
Gets
you
a
much
larger
machine
and
that
way,
you're,
not
modifying
taking
off
tracks
and
breaking
tracks
or
maybe
taking
off
power
cubes
or
not
like
make
it
to
make
it
as
simple
as
possible,
we're
using
the
micro
track
as
a
building
block.
So
consider
that
that's
a
Lego
unit
you
can
put
two
or
three
of
them
together
in
a
workshop,
we're
building
three
of
those.
A
So
we
have
decided
upon
that,
which
means
that
you
will
have
to
micro
tracks
side-by-side
with
a
third
one
in
the
back,
so
we
go
through
different
configurations
that
we've
considered
we've
considered
one
that
looks
like
this
here.
This
is
the
prior
work,
but
the
basic
concept
here
is
building
a
so-called
high
track
drive
system
where
you
have
a
drive
sprocket
on
the
top
and
idler
wheels
on
the
bottom
on
the
ground,
with
a
big
track
around
that.
So
it's
like
caterpillar.
They
have
a
high
track
version.
A
Basically,
where
the
drive
is
on
top,
so
you
don't
get
it
dirty
and
it's
it's
a
convenient
configuration.
We've
gone
through
some
calculations
also
which
are
in
another
document
and
the
main
concepts
here
are
in
this
document,
we're
going
through
how
we
we
design
the
tracks
with
the
idlers
with
the
drive
sprockets,
we
use
very
large,
powerful
wheel
motors
that
are
about
fifteen
to
seventeen
thousand
inch
pounds
of
force.
You
can
find
them
in
surplus
center.
We've
prototyped
it
rapidly
using
a
3d
printer
to
find
the
basic
geometry
of
the
tracks.
A
Also,
we
used
a
sprocket
generator
to
generate
the
actual
professional
I
mean
the
authentic
sprocket,
just
like
on
a
bike
chain.
There's
a
particular
geometry
formula
that
you
can
use
for
that,
and
we
are
here
showing
how
using
clamps
instead
of
key
ways
here.
We
also
show
a
key
way,
but
we're
using
clamps
and
a
current
implementation
to
do
things,
and
the
overview
is
that
you
have
Universal
rotor
units.
You've
got
idler
units
where
the
track
rides
in
you've
got
the
power
cube.
A
You've
got
the
basic
frame
because
the
power
cube
already
has
a
frame
on
it.
The
frame
that
we're
using
for
the
micro
tracks
and
the
bulldozer
is
a
very
simple
flat
frame
made
of
the
four
by
four
tubing.
Only
other
things.
There
are
the
the
track
tightener
and
pretty
much
that's
an
entire
bulldoze
and
clean
all
the
implements
that
you
have
to
add
them
front,
and
back
now
we
followed
industry
standards
to
see
how
how
to
design
our
own.
So
we
looked
at
bulldozer
tracks.
A
We
looked
at
how
chain
looks
and
combining
basically
a
bicycle
chain
with
industry
standard
bulldozers.
We
designed
our
own
geometry
for
how
our
track
would
look.
Here's
what
the
professional
version
looks
like
you
can
study,
basically,
as
a
bunch
of
rollers
idlers
in
our
configuration,
we
only
have
the
drive
sprocket.
We
have
the
tracks
we
have
two
idlers,
but
because
the
bad,
the
the
length,
the
wheelbase
is
rather
short,
we
are
not
using
the
all
the
rollers
like
in
a
professional
bulldozer,
keeping
it
as
simple
as
possible.