►
From YouTube: Tractor Construction Set 2017
Description
Here we go over Tractor Design 101 for hydraulically driven tractors based on the last 8 years of OSE experience. THe methods here are relevant to the simplest, most flexible tractor design possible - which means tractors with a hydraulic drive train.
Working Document - https://docs.google.com/presentation/d/15nrOGudjeHD1deKjNiA1cc1qNdCRVxMJip-XphCmxbc/edit#slide=id.g1861bf60d5_0_6
Slight correction at Minute 5 in the video - I mention Frame Integrated Fuel Tank. For the 16 hp engines, those have a fuel tank build in with them, so the Frame Integrated Fuel Tank option would apply only to engines that do not have a built-in fuel tank. -MJ
-----------------------
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Take a minute to subscribe to our email newsletter (updates, workshops, etc): http://bit.ly/1LtcM44
A
The
short
of
it
is:
we've
done
done
a
lot
of
work
on
the
tractor
about
eight
or
so
prototypes
and
in
general
it
works,
but
it's
about
refining
it
to
now,
where
I
think
we're
ready
to
a
final
state
where
we
just
make
everything
work
properly
and
work
out.
The
little
details
we've
proven
just
about
I
mean
you
know
a
lot
of
the
different
subsystems.
Up
to
the
tracked
version,
I
mean
that's
all
working.
The
modularity
is
working
really
well
and
we're
ready
kind
of
like
for
the
next
next
big
step.
A
A
So
if
you
look
at
this
document,
that's
the
working
document
page
you
can
edit
it
there
summary
of
that
is
Achmed
from
Team
and
obey
is
join
the
development
team
and
we're
waiting
for
a
few
more
people
from
your
side
to
do
the
test.
I
mean
I.
Think
it's
taken
people
some
time,
but
we're
definitely
looking
forward
to
more
people.
Tractors,
September,
30,
31st,
osce,
us
a
Middle,
East
North
Africa
build
December.
This
is
for
some
very
tangible,
real
events.
The
one
September
30
to
30
first
is
definitely
happening.
A
And,
let's
let's
look
at
that
now,
the
things
on
a
plate
are
we
worked
typically
with
normal,
our
cubes
and
the
minimum
like.
Let's
talk
about,
let's
start
by
saying:
what's
the
minimum
viable
product,
okay,
MVP
versus
the
other
options
that
we
have
that
we
want
to
do,
but
it
depends
on
more
people
joining
the
team
because
we
just
don't
have
the
energy
so
so
other
features
solar,
so
other
feature
is
solar
powered
for
slow
operation.
The
minimum
viable
product
is
a
very
simple
gasoline
powered
power,
cube,
which
we
have
met.
A
Much
experience
with,
we've
probably
build
so
far.
Maybe
I
don't
know,
maybe
like
30
of
them
solar-powered
so,
but
the
other
feature
is
because
the
the
power
cube
is
a
universal
hydraulic
power
source
it
can
be
fed
by
whatever
power
could
be
based
on
an
electric
motor.
It
could
be
based
on
solar
power
driving
an
electric
motors,
but
basically
the
two
two
possibilities
you
have
is:
either
fossil
fuels
or
renewable
fuels
or
solar
or
electric,
but
in
any
case
it
works.
So
you
have
some
kind
of
a
motor
driving
a
hydraulic
pump.
A
So
the
question
for
what
drives
the
hydraulic
pump
is
the
question
so
and
just
for
reference.
The
kind
of
typical
work
on
a
power
cube.
There's
the
power
cube
page
on
the
wiki
is
pretty
representative
of
the
existing
work.
If
you
see
the
video
on
the
power
cube
page,
that's
like
the
general
way
we
build
it.
So
I'm
just
going
to
put
a
link
to
that
in
a
document.
That's
the
main
power
cube
page.
A
You
can
see
how
the
thing
works
and
how
it's
put
together
and
now
what
we
want
to
do
is
a
cnc
cut
frame.
I
would
say:
that's
like
a
minimum
product.
Is
why?
Because
it's
just
so
much
more
efficient
to
do
it,
especially
after
we've
built
the
3d
printers
and
seeing
how
fast
it
is
to
build
with
CNC
cut
frames,
because
all
the
alignment
is
already
taken
care
of
by
the
CNC
cutting
you
don't
have
to
worry
about
it.
The
the
cube
when
CNC
cut
is
self
jigging.
A
You
don't
need
any
jigs
or
alignment
procedures,
because
the
parts
are
already
accurate.
So
we
want
to
do
that
and
with
that
said,
we
can
integrate.
So
I
want
to
do
as
a
minimum
viable
product
integrate
the
fuel
tank
into
the
frame,
because
when
we
can,
because
already
the
fuel
tank
could
be
consisting
of
three
if
you've
got
four
of
the
frames
frame.
A
Sides
like
one
two,
three
four,
either
three
or
four
of
the
frame
sides
that
are
CNC
cut
can
already
be
used
in
that
fuel
tank
and
from
there
just
a
little
bit
more
work
gets
you
a
frame,
integrated
tank,
which
means
that
you
can
see
and
see,
cut
it
and
possibly
notch
it
and
bend
it
so
that
the
build
of
the
the
hydraulic
tank
is
super
simple
I
can
tell
you
that
from
experience,
the
the
hydraulic
and
fuel
tanks
were
is
counts.
On
the
more
difficult
of
all
the
work.
That's
done.
A
Everything
else
is
you
know
the
fuel
tank
and
hydraulic
tank
that
actually
takes
the
most
time
because
of
all
the
welding
in
there
and
so
forth.
So
I'm
going
to
simplify
that.
So
the
big
word
is
they're,
simplified
and
in
fact,
the
way
we're
doing
just
a
detail
on
that
is
use
some
kind
of
a
tank
sealer.
Instead
of
relying
on
welding
for
the
final
seal
use
a
tank
sealer
instead
of
a
finished
weld
for
seal.
B
A
C
A
A
A
A
B
B
A
A
I
like
it,
and
that's
that's
actually
exactly
what
I'm
thinking,
because
that,
if
we
take
the
modularity
to
that
level,
that
would
be
even
better,
so
I
would
say
that
we
really
work
hard,
like
probably
make
it
annum.
Innum
viewable
product
make
the
modular
like
really
modular.
That
means
you
can
use
it
in
other
places.
You
can
dismount
and
reuse.
A
A
Perhaps
if
you
look
at
the
overall
difficulty
of
the
power
cube,
the
number
one
thing
is:
perhaps
the
pump
mounting
to
the
engine
and
the
second
one
is
the
tanks.
So
if
we
can
nail
this
I
like
it
that
you're
thinking
about
all
right,
so
let's
let's
put
that
on
on
just
just
defining
the
minimum
vivo
product
here
so
and
let
me
also
link
to
life.
A
A
That
is,
we
don't
have
the
manpower
right
now
to
work
that
out,
but
if
we
get
more
people
on
a
team,
that's
a
call
out
for
a
bio
fuel
tractor
we've
already
built
a
prototype
in
2015,
so
I
think
there's
a
let
me
get
it's
a
gasifier
3d
CAD
page
on
the
wiki.
So
let
me
just
paste
that
link.
So
you
know
what
the
prior
art
is
on
the
so
in
a
working
document,
I'm
putting
a
link
to
let's
see,
what's
good
yeah,
gasifier,
3d
CAD
right
there,
it's
already
linked
there.
A
A
A
A
Yeah
I
mean
this
gets
into
the
actual
detail
of
okay.
What
is
our
hydraulic
diagram?
Because
you
can
you
can
wire
this
up?
Plumb
it
up
and
the
various
configurations
I
mean
the
hydraulics.
The
hydraulic
circuit
design
is
the
complete
part
of
the
you
know
complete
story
in
itself.
As
far
as
the
design
goes,
you
want
to
make
for
modularity.
You
want
to
make
it
such
that
it's
as
flexible
as
possible.
So
we
can
look
at
those
details
later,
but
let's
keep
going
through
the
main
features.
A
Definitely
the
robotic
version,
meaning
like
guidance
with
like
computer
vision,
I
mean
vision
like
robot
vision.
Right,
that's
definitely
a
thing.
That's
a
definitely
a
double
module.
I
mean
everyone
does.
This
is
like
FIRST
Robotics
or
whatever
the
toy
robots,
that's
common
knowledge
in
an
open
source.
So
we
can
add
that
and
the
relevance
for
that
is
if
we
get
that
done
and
I
know,
one
of
the
Saudi
guys's
got
that
skill
set.
So
hopefully
he
can
join
us.
A
So
this
is
a
video
for
for
the
innovate
team
to
to
join
the
team,
but
the
practical
application
for
us
is:
we
can
do
if
you
mount
a
solar
panel
with
a
very
small
power
cube
a
little
solar
power
cube.
You
can
have
a
tractor
that
moves
very
very
slowly,
but
it
can
still
move
right,
yeah
exactly
because
hydraulics
are
flexible
like
that.
The
power,
not
not
the
power
but
the
torque
will
be
there.
A
Even
if
you
have
a
very
tiny
power
cube
because
of
the
way
hydraulics
works,
so
you
can
have
even
a
single
solar
panel
run.
You
know,
say
our
micro
track,
which
we
did,
the
you
know
2,000
pounds.
A
single
200
watt
solar
panel
can
run
that
it
would
mean
that
it
goes
very,
very
slowly
across
the
field,
but
it
could
be
used
for
things
like
weeding
like
if
you
got
a
garden-
and
this
thing
just
automatically
goes
in
your
garden
and
does
your
garden
as
part
of
a
home
scale.
A
A
lot
of
enabling
open-source
technology
is
out
there
for
that
to
be
possible
so
that
you
can
run
your
engine
if
you
want
to
just
use
your
tractor
and
regular
operation,
but
you
can
also
do
it
autonomous
operation,
where
you
just
have
very
slow
motion,
but
still
with
a
very
large
torque
that
you
can
pull
whatever
a
leader.
You
can
do
a
wieder,
whatever
some
kind
of
a
tillage
like
mowing
or
tilling
operation
or
whatever.
That's
that
does
that
24.
A
A
A
Now
you
might
be
share
my
screen
of
the
bandwidth.
Is
there
no
I'm
I'm
not
going
to
share
my
screen?
The
bandwidth
might
be
a
little
limited
here,
so
so
I'm
pasting,
the
OST
part
library
in
a
working
document,
slide
10.
So
in
a
noisy
part
library,
if
you
click
on
that,
the
part
of
interest
is
the
modular
wheel
unit.
A
So
once
again
for
anyone
who
is
looking
at,
if
you
look
at
the
chat
box,
that's
the
working
document,
page
ten
we've
got
the
modular
wheel
unit.
So
if
you
look
at
modular
wheel,
units
also
goes
by
quick
connect
wheels.
But
this
is
the
core
of
it.
Basically,
that
if
you
look
at,
for
example,
update
of
July
14
2015,
you
see
that
Universal
rotor,
which
is
basically
a
frame
with
a
Hydra,
very
heavy
duty,
hydraulic
motor
with
two
bearings
and
a
shaft
and
the
shaft
that
we
use
could
either
be
two
inch
or
three
inch.
A
If
it's
a
three
inch
shaft
than
this
Universal
wheel
unit,
you
can
attach
wheels
directly
to
it
in
another
application.
You
can
put
the
drive
sprocket
on
this,
like
you
see
within
the
life
track,
the
micro
track
here
and
you're
driving
a
track,
so
that
is
when
you
use
the
entire
universe.
Universal
rotor
this
Universal
wheel
unit
with
its
own
structural
frame.
It's
a
ready,
quick
disconnect
module
that
you
can
use
on
any
machine.
A
So
we've
used
it
for
the
the
trencher
we've
used
it
for
wheel,
drive
for
track,
drive
very
universal
universal
thing.
It
can
be
a
posthole
digger,
it
can
be
whatever
you
like,
and
it's
and
that's
a
very
powerful
concept.
So
one
of
the
first
things
in
the
project
here
will
be
to
reverse
engineer
this
basically
to
draw
this
out
with
in
free
CAD.
Now
this
is
a
file
that
this
is
from
another
guy
who
did
this
in
like
AutoCAD,
but
he
actually
lost
the
file.
A
So
we
don't
have
this
even
to
get
a
step
export,
but
we
do
have
at
least
a
full
sketch
up
if
people
want
to
work
off
Sketchup,
but
the
dimensions,
the
actual
real
dimensions
are
there
in
this.
If
you
go
to
the
universal
motor
page,
the
actual
explicit
dimensions
are
here.
So
we
can
reverse
engineer
this.
This
entire
structure
basically
draw
this
up
in
a
free
cab.
So
that's
one
of
the
first
things
you
want
to
do
and
then
add
the
bearings,
the
hydraulic,
motor
and
everything
else.
A
So
we
have
a
real,
less
realistic
rendering
and
we
should
do
two
files.
One
is
a
very
simple,
just
general
simplified
file
and
another
one.
It's
the
full
detail
which
has
all
the
bolts
and
everything
and
all
the
minor
details,
but
that's
going
to
be
heavy,
so
we
won't
use
that
in
our
general
design.
We
use
that
as
an
other
purposes,
but
for
for
the
conceptual
design
we
want
to
use
the
simplified
file,
so
the
freakin
file
remains
very
small.
A
You
can
also
go
up
and
why,
and
so,
if
you
have
the
frame
built
into
it,
what
you
see
is
for
a
microt
track
application.
That
thing
is
so
wide
and
I'm.
Looking
at
the
quick-connect
wheels
page
on
the
wiki,
that
shape
is
the
the
universal
or
is
so
long
that
at
minimum
you
have
to
have
about
40
inches
or
so
to
drive
a
track
light,
and
that's
why
one
of
the
tracks
there
it's
driving
one
track,
but
it's
above
the
other
track
on
the
other
side.
A
You
know
what
a
Toro
dingo
is:
that's
a
small-scale
walk-behind
tractor
with
loader,
but
for
very
small
machines.
We
can
get
rid
of
the
whole
frame
and
just
use
the
motor
directly.
So
those
are
the
two
variations
now
for
the
general
process
of
what
we're
going
to
design
me.
If
we
build
around
so
we've
got
the
structural
tubing
that
we
still
want
to
use
for
all
the
frames
and
everything
else
like
the
cab.
We
want
to
do
custom,
arms,
because
arms
have
complex
geometry:
it's
not
that
easy
to
make
it
with
a
box
beam
tubing.
A
A
I'm
going
to
put
a
separate
note
there
or
use
the
hydraulic
wheel
motor
without
the
frame,
so
you
can
make
a
much
more
compact
machine
because,
as
you
see,
that
frame
to
hold
those
two
bearings
and
to
hold
that
shaft
requires
a
lot
of
space.
So
we
don't
have
to
do
that.
We
can
drive
things
directly
off
the
hydraulic
motor
shaft,
but
we
have
to
be
careful
how
we
do
that?
Okay.
A
A
In
other
words,
we're
designing
more
for
the
flexible
system
where
we
can
modify
this
wear
with
minor
modifications.
We
can
use
one
two
or
three
power
cubes.
So
that's
a
that's
required
in
an
MVP
continuing
with
other
features,
3d
printed
track
pads.
That
will
be
nice,
but
at
that
point
we
probably
want
to
do.
We'd
have
to
have
our
filament
maker
to
extrude
extrude,
our
own
rubber
filament,
because
we
can't
afford,
like
you,
know,
15
bucks,
a
kilogram.
That's
that
gets
pretty
expensive,
I
mean
per
weight,
I
mean
metal
is
$1
per
kilogram.
A
Plastic
is
15
dollars,
a
kilogram
which
is
off-the-shelf
prices.
Unless
we
start
making
on
our
own
filament.
We
can't
afford
to
3d
print
too
much
rubber
or
plastic
I
mean
the
track
pads
or
tracks
even
3d
printed
tracks.
That
would
be.
That
would
be
a
lot
of
weight,
but
that's
like
nice
to
have
possible,
but
you
know
not
worry
about
it
right
now.
A
A
So
yeah
like
2.0
modularity,
because
we've
already
shown
this
amazing
modularity
with
interchange
of
power,
cubes,
interchangeable,
wheel,
drive
and
so
forth,
but
one
take
it
to
the
next
level.
So
that's
that's
basically
it
so
so
let's
do
it.
Let's
do
it
add
the
next
slide
to
actually
talk
about
start
talking
about
the
design
itself,
so
I'm
going
to
do
general
general
design
concept.
Is
that
I
mean
let's
just
start
sketching
out,
so
you
can
understand
how
easy
is
I
mean
for
me
when
I
first
built
the
first
tractor
I
was
like
wow.
A
You
got
a
power
unit
which
we
have
so
we
have
the
ability
to
do
frames
and
to
do
power
unit
we're
sitting
on
top
of
the
frame
or
wherever
or
the
power
unit
itself
can
be.
Structural
and
that'd
be
the
frame.
That's
another
way
to
go,
but
not
the
way.
We're
doing
it
right
now
we're
doing
a
non
structural
power
unit,
because
it's
for
our
application
right
now,
it's
actually
easier
because
the
frame,
what
we
found
out
is
that
the
frame
is
just
a
simple
frame
is
just
too
easy
to
build.
A
You
don't
need
to
hang
everything
on
a
power
unit,
because
once
you
start
hanging
everything
on
a
power
unit,
it's
actually
very
there's
not
enough
bolt
holes
there.
It
gets
really
too
complicated
and
then
it's
very
hard
to
remove
the
power
unit
itself.
So
there's
reasons
why
we
don't
want
to
do
the
module
like
the
it's
modular,
but
it's
not
structural,
so
it's
non
structural
but
modular
power
unit,
okay
and
there's
there's
a
whole
discussion
is
why
that
is
desirable
from
our
earnings,
okay
frame,
so
that
you
have
the
frame.
A
You've
got
the
wheel,
drive
and
then
typically
for
for
a
usable
tractor,
you
want
to
have
some
kind
of
implements.
So
then,
like
a
loader
is
a
universal
implement
for
a
lot
of
things,
because
the
loader
also
allows
you
to
mount
the
other
implements.
They
can
have
a
loader
on
the
front
on
the
back.
Let's
just
do
this
as
the
most
basic
tractor
design,
you
got
a
power
unit,
you
got
a
frame
in
a
wheel,
drive,
you
got
a
loader
and
you
also
have
the
hydraulics.
I
mean
the
hydraulic
circuit.
A
But
literally,
the
point
of
this
is
think
when
you
think
modular.
What
you
have
to
think
is
that
each
one
of
these
can
be
built
independently
of
one
another,
and
that's
why
hydraulics
I
mean
they
can
literally
built,
be
built
independently
and
then
put
put
into
place.
Everything
here
can
be
built
independently
and
put
into
place
and
that's
how
we
achieve
the
the
one-day
builds.
That's
required.
If
you
got
the
modularity
is
required
for
the
one-day
build
just
pushing
the
limits
of
what's
possible
there.
A
So
so
that's
that
this
is
essentially
what
the
tractor
is
and
when
you
understand
it,
you
can
okay,
the
frame
we
can
probably
understand
you
guys
all
did
the
power
the
making
the
power
cube,
the
cube
test
and
free
CAD,
that's
all
frame
is
the
best.
Design
of
a
frame
is
typically
space
frame
construction,
which
is
it's
a
space
frame.
It's
called,
but
we
can
also
do
flat
frames
like
a
flat
platform
that
works
to
power
unit.
The
other
thing,
if
you
talk
about
a
tractor,
that's
for
human
consumption
that
you
actually
sit
in
it.
A
A
So
the
cab
is
a
square
structure
that
cubic
that
protects.
You
it's
got
a
seat.
It's
got
the
hydraulic
controls
so
that
actually
the
most
of
the
hydraulic
controls
you
can
really.
We
should
probably
presented
like
the
cab
is
here
most
of
the
hydraulic
controls
are
actually
going
to
be
in
the
cab,
because
I.
A
Yeah
I
mean
the
hydraulic
controls
are
in
the
cab,
so
let's
clarify
that
I
mean,
of
course
the
other
hydraulics
are
on
each
component.
Like
the
wheel
drive
has
its
has
its
hydraulics,
the
loader
would
have
hydraulics,
typically
and
so
forth,
but
you
have
to
have
the
control
system
in
there,
so
cab
with
hydraulic
controls,
which
is
levers
or
you
can,
if
it's
more
automated
than
you
have
actually
buttons
and
things
so
whatever
whatever
that
is.
Okay,
there
we
go
okay.
So
let's
talk
about
frame
like
the
basic
things
like
when
you
build
it.
A
Okay,
so
that's
that's
the
super
basic
design,
diagram
right
and
then
you
go
a
little
more
complex
and
then
you
can
start
saying
so:
let's,
let's
talk
about
this
so
frame
holds
all
components
together.
I
mean
everything
pretty
much
attaches
to
the
frame.
So
let's
say
I
mean
just
about
everything
attaches
to
the
frame
in
general.
A
Go
into
Cabot
there's
a
cab,
sometimes
sometimes
no
cab,
because
if
you
do
walk
behind,
do
a
walk
behind
or
stand
on
tractor,
that's
for
smaller
ones,
that's
for
smaller,
but
the
best
design
principle
would
be.
If
you
can
do
this,
and
you
can
actually
replicate
modules
of
this
so
say
this
is
our
well.
Let's
talk
about
the
basic
the
base
tractor
unit
like
for
it
to
be
tracting
traction.
A
So
one
one
configuration
possible
is
you've,
got
what
you
have
here
one.
You
know
this
kind
of
assembly
here
or
you
can
have.
Let's
take
this
now
now
talking
about
scalability,
so
you
can
have
frame
and
wheel
drive,
but
you
can
have
multiple
units
of
that
too.
So
the
way
we
built
and
you
can
have
multiple
frame
units
with
wheel
drive
like,
for
example,
we
can
have
an
articulated
version.
You
can
have
a
connection,
you
can
have
a
connection
there.
A
So
so
that's
that's
the
curious
thing
we
can
do
because
of
the
way
we're
designing
the
wheel
drive
like
say
you
do
the
track
the
track.
Let's
call
the
track
or
a
wheel.
Our
basic
basic
drive
module.
You
can
make
configurations
where
you
have
all
kinds
of
variations
on
that.
So,
let's
go.
Let's
maybe
go
to
the
I'm
going
to
duplicate,
slide,
duplicate
slide.
A
And
this
is
what
we've
done
with,
for
example,
let
me
paste
I'm
going
to
actually
paste
this
thing
in
here.
So
I
can
refer
you
to
this.
Well,
that's
what
happened
here.
You
got
a
you
got
a
frame,
you
got
a
wheel
drive
and
you
get
a
track
unit
and
we
did
that
ended
up
being
about
forty
inches
across.
A
The
way
it
is
currently
and
then
there's
the
track
unit
now
the
track
unit
is
is,
if
you
can
consider
the
way
that
this
can
be
varied
already,
a
very
simple
frame
of
this.
So
this
kind
of
design
you
can
have
a
frame
and
then
you
can
have
say
to
track
units.
So
it's
more
like
you
know
a
bigger.
You
know
bigger
frame,
more
track
units.
A
You
can
do
like
a
pretty
large
tractor
using
just
this
basic
basic
philosophy.
Here
you
can
have
four
track
units,
one
on
each
side
and
do
like
that
and
a
big
frame,
and
that
would
be
some
heavy-duty
tractor
and
that
this
is
one
thing
that
I
think
we
should
probably
focus
on
doing
this,
like
as
one
implementation.
A
A
A
A
We
can
prototype
it
with
as
little
as
one
power
cube.
One
power
cube
is
sufficient
to
run
this
and
we
can.
We
can
do
this
very
basic
thing,
but
what
would
look
very
impressive
actually
is
if
we
do
this
and
put
on
like
four
power
cubes,
because
at
that
point
well,
four
power
cubes
is
only
the
with
the
existing
ones
16
times
four
is
only
64
horsepower.
So
that's
you
know.
A
That's
a
nice
serious
working,
tractor
and
tractors
of
this
size
now
like
track
tractors
like
this
they're
very
expensive,
so
already
at
this
kind
of
implementation,
we'd
be
saving
a
lot
of
money
over
an
existing
tractor,
but
think
about
it.
If
you
actually
added
like
four
more
power
cubes,
that
makes
a
128
horsepower
tractor
now
that
there's
some
serious
work
and
at
that
level
we
probably
would
be
very
competitive
with
anything
that's
out
in
the
market,
because
the
facts
are
the
larger.
A
A
Else
you
can
be
talking
about
500
bucks
for
the
power
cube.
Let's
say
you
know
so
save
put
it's
only.
You
know
say
160
horsepower
tractor.
You
got
10
power,
cubes
$5,000
480
horsepower
$15,000,
so
you
can
see
how
we're
not
adding
too
too
much
to
the
overall
cost.
Anyway,
the
prices
get
very
attractive
once
you
go
to
larger
machines
but
okay,
so
that
could
be
a
big
one.
A
But
let's
you
know:
let's
not
go
so
crazy
right
now,
I
think
very
practical
right
now
would
be
for
power
cubes,
and
a
nice
tractor
like
this
would
be
a
serious
earthmoving
tractor
like
it
would
probably
have,
depending
on
how
we
do
the
track
units
easily,
like
20,000
pounds
of
pushing
torque,
pushing
force
and
stuff
like
that.
Okay.
But
let's
talk
about
a
smaller
version
and
how
would
we
do
that
with
a
similar
track
unit?
So
so
this
one
is
essentially
like
this.
A
It's
a
track
unit
track
unit
yeah
I
mean
that
the
conceptual
design
here
is
I
mean
is
essentially
like
this
here.
So
for
this.
So
let's
talk
about
how
we
can
do
the
same
design
pattern
so
like
basically
with
the
same
or
very
similar
parts
and
some
that
are
ident
go.
We
do
a
small
tractor.
So
let's
talk
about
walk-behind
compact
walk-behind
come
because
we
actually
need
that.
A
A
A
A
So
here's
a
loader:
now
how
do
you
do
the
detail
so
that
we
can
do
a
very
tiny
machine?
That's
only
like
you
know,
36
3
feet
4
feet
wide
for
a
person.
Well,
you
can't
use
the
standard
wheel
drive
unit.
We
just
would
have
to
take
the
regular
hydraulic
motor
and
put
the
the
sprocket
directly
on
it.
So
there
we
go.
A
The
wheel
drive
is
simply
a
small,
very,
very
small
iteration
without
the
structural
frame,
so
tiny
wheel
drive,
so
you
have
the
on
it
on
the
hydraulic
motor.
You
have
the
the
sprocket
on
it
directly,
so
you
have
to
design
it
so
wheel,
drive
you
need
one
on
each
side
and
that
way
you
can
have
steering
which
is
track,
steering
so
this
steers
as
track.
Steering
this
big
one.
Ok!
So,
let's,
let
me
tell
you
one
detail
about
this.
A
If
it's
like
this
track,
steering
here
is
difficult
because
it
it's
long
like
that
you're
going
to
put
a
lot
of
torque
on
track
units,
it
would
probably
work.
But
if
you're
going
to
do
this
configuration
here,
you
you
would
have
to
do
either
articulating
steering.
So
you
basically
I
mean
in
this
this
implementation.
You
would
want
to
go
like
this.
You
want
to
have
to
frame
units
and
our
articulation
in
the
middle.
A
A
You
have
to
really
highly
engineer
the
wheel
units,
if
you
do,
if
you
do
the
connection
and
articulates
during
connection
between
the
two,
this
is
readily
doable
with
much
lower
technology
level.
You
don't
have
to
worry
so
much
about
so
like
that.
Articulate
steering
is
one
implementation
and
let
me
go
to
the
next
page
for
the
configuration
like
of
the
large
tractor
with
track
steering.
A
So
large
tractor
with
track
steering
not
articulated
steering
I
mean
you
can
have
the
tracks
turn,
but
that's
a
whole
complex
mechanism.
So
we're
talking
about
you
know
like
the
lowest
technology
level
that
you
can
accomplish
for
a
large
machine.
The
way
you
can
do
it
for
a
large
tractor
to
make
it
very
easy
to
steer
is
if
you
widen
the
wheelbase
so
say
you
got
two
tracks
right
next
to
be
hunting
to
each
other
and
a
very
wide
wide
wheelbase.
A
That
way,
when
you,
when
you
steer
the
forces
on
the
track
themselves,
are
minimized,
so
in
this
configuration
we
can
get
rid
of
the
articulation
to
frame
to
piece
frame.
You
can
do
a
long
frame,
that's
long
this
way,
so
that
the
tracks,
basically
so
that
the
and
you
can
put
as
many
power
cubes
as
you
want
on
this.
But
this
way,
basically,
the
width
of
the
tractor
has
to
be
greater
than
length
of
the
tractor.
So
to
represent
that.
So
that's
the
call
that
the
length
the
length
has
to
be
smaller
than
the
width.
A
That's
the
general
general
condition
for
this
large
tractor
to
work
just
by
track,
steering
without
having
engineered
wheel
mounting.
So
that's
the
width
there.
The
condition
is:
that's
the
length
edition
of
satisfaction
that
has
to
be
that's
the
length
and
lengthen
the
width.
You
really
want
length
lower
than
with
to
make
for
very,
very
simple
mounting
like
here.
You
can
literally
connect
them
in
a
very
simple
way.
It's
that's
just
just
how
it's
going
to
work,
because
you
can
think
about
it.
A
If
you're
turning
then
say
is
this,
this
track
is
stationary,
and
these
are
to
turn
to
the
you
know,
to
this
side
will
turn
one
way.
One
track
is
going
to
be
in
place
and
another
one
is
going
to
be
rotating
right
or
you
can
go
where
the
one
track
is
rolling
forward
and
the
other
track
is
track.
Side
is
going
backwards.
That
way,
you
can
literally
spin
in
place
and
if
you
think
about
it,
you'll
be
much
harder.
A
If
the
length
is
too
long,
it'll
be
very
hard
to
do
that,
but
you
can
think
about
it.
The
the
wider.
It
is
the
easier
it's
going
to
be
for
you
to
spin
in
place,
which
is
a
very
useful
thing
for
motion
like
you
want
to
do
tight,
tight
radius
turns
you
have
you
want
to
be
very
maneuverable
and
on
a
tractor?
So
that's
a
gentle
fear.
Okay,
so
we'll
quit
the
theory
for
now
here,
as
far
as
where
we
are
with
the
design,
but
but
the
next
step.
A
As
far
as
the
practice
goes,
we
can
start
generating
the
actual
parts
and
forget
so
we
already
have
the
tubing.
So
you
can
make
simple
frames:
we
can
make
calves
and
things
like
that
and
we
can
bolt
things
together,
but
the
next
steps
here
would
be
to
draw
up
the
universal
rotor,
meaning
the
yeah.
So
let's.
A
Slide
pan
the
golfer,
you
know
the
media
design
will
be
to
draw
the
quick-connect
wheels
and
free
cab.
So
basically
we
get
a
reverse
engineering.
Do
reverse
engineering
on
this
is
basically
put
this
into
pre-cut
the
the
design
that's
already
shown
in
detail.
There's
a
there's
a
like
a
technical
drawing
of
the
wheel
units
on
a
quick-connect
wheels
page
that
needs
to
be
drawn
up
in
pre
cad
and
then
what
we
also
want
to
do
is
drop.
It
so
drop
a
version
of
this
with
the
drive
sprocket
you
know
here
doesn't
have
the
drive
sprocket.
A
A
A
Maybe
like
facing
down
like
down
as
opposed
to
on
top
of
the
frame
so
that
the
wheels
have
more
space.
You
know
more
clearance
above
the
ground,
but
the
concept
is:
if
you
use
the
structural
universal
rotor,
you
can
attach
either
wheels
or
tracks
to
it
and
that's
the
beauty
of
it.
So
now
we
can
basically
start
playing
the
same
machine
literally.
If
we
build
our
wheel
units
then
and
track
units.
A
Those
are
modules
that
we
can
literally
use
either
and
I
can
tell
you
that
for
for
muddy
territory,
I
mean
you
definitely
want
tracks
a
lot
of
times,
but
you
want
wheels
when
you're
going
on
traveling
more
distance
I
mean
tracks
are
pretty
hard,
a
road,
they
dump
a
lot.
So
so
you
want
to
be
flexible
and
do
all
kinds
of
configurations.
So.
A
A
Mind
so
that's
good.
We
can
start
going
in
and
design
the
basic
frame
with
real
units.
Once
we
get
the
front
the
power
cube
done,
then
we
just
simply
attach
a
few
power
cubes
to
this
and
we're
good
to
go.
But
it's
as
simple
as
that,
the
the
detailed
so-called
engineering
work
of
actually
how
things
fit
are
going
to
come
when
we
get
to
the
loader,
which
has
that
very
specific
geometry
and
has
to
have
specific
reach,
and
we
probably
want
to
do
yeah
that
we'll
get
to
that
later,
but
but
that's
how
it
works.
A
For
now
we
do
the
hydraulic
motor
that
kind
of
motor
that
you
see
in
there.
That's
that's
what
we
have
and
that's
what
we've
been
using
now
we.
We
might
also
want
to
look
at
other
sources
like,
for
example,
for
you
guys
in
Saudi
Arabia.
Can
you
get
a
motor
like
that?
I
don't
know
or
what's
the
closest
to
it?
You
know
yeah
I'm
sure
you
can.
A
A
We
can
we
do
that
dude
likes
check-in
for
an
hour,
get
going
InDesign,
and
then
we
can
continue
going
like
that.
So
in
the
current
implementation
we
can
do
like
once
you
have
the
wheel
units
drawn
up.
We
can
literally
start
attaching
them
to
small
and
large
frames
to
build
like
either
a
tiny
tract
or
a
huge
one,
and
then
we
can
modify
like
okay.
How
big
are
the
actual
tracks
that
we're
making?
What
tracks
are
we
going
to
make
for
the
very
tiny,
tiny.
A
C
Even
one
o'clock:
okay,
okay,
so
we
have
the
rent.
We
typically
have
the
regular
meetings
at
1:00
p.m.
so
maybe
we
can
make
this
at
noontime,
okay,
good,
okay.
So
let's
plan
on
the
next
meeting
of
this
track
team
at
noontime,
so
basically
right
before
the
main
meaning
we'll
have
the
dedicated
tractor
team
meeting
right
before
on
Tuesdays
every
Tuesday,
noontime
Central,
Standard,
Time,
USA,
yeah
and
okay.
A
But
the
answer
is
on
your
lives
so
because
everybody's
we've
got
links
to
everybody's
are
log
on
a
development
page,
so
so
I'm
looking
at
achmed
log
on
a
wiki
right
now
so
and
do
that
earliest
entry
on
top.
So
as
soon
as
you
have
that
design
just
post
your
freecad
up
there
and
okay
yeah,
that's
that's
the
main
thing
to
know,
and
that's
it
all
right.
So
that
would
be
it.