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Hello everyone. Today I wanted to show you the swing axle
suspension. Basically his
advantage over the twin rope suspension
is that it doesn't need any
advanced ballsocketing
but it got few drawbacks
as the wheels that rotates
on the Y axis
I have a
little contraption like
the Piaggio here, that uses
2 swing axles on the rear
an on the front just an axis
the suspension is quite reliable
obviously the wheels
do spin
as I said it does not use
any advanced ballsocketing
I have to say that
these suspensions need to
run on Hydraulics or Elastics
I prefer Hydraulics since i can tune them
when i'm riding
let me show you the principle of this suspension
This is the wheel that has
an offset ballsocket
that is represented by the
green sphere here
You can imagine it as the wheel had an axis
yellow one that's then ballsocketed
to the body
this axis is just welded to the wheel
with this little setup the wheel won't stay
in place, it will go forward and backward. SO you
Need a rigid rope
to hold it in position so it can move just up and down
and rotate on its own axis
In order to keep the
suspension in place, you need a Hydraulic
or you can use an elastic
but I do not like them
You can see here:
this is a rope, not rigid
that's used as a limiter
For the suspension. If you already made suspensions
you may have seen that getting a bump
usually makes the suspension fly over the car
usually makes the suspension fly over the car
Using this rope that I'll show you later, the suspension is bounded to a
maximum and minimum value
you can flat the suspension
but with few movements on the body
it will just reset in place
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Well let's start. In order to get this suspension you need to have
the Precision Alignment tool
or a tool that let's you create
offset ballsockets
Here I have my body
Grab the spherical collision tool, I recommend you to
make your wheels spherical
as they will have more grip
[ stability, lagfree, do not dive, do not spaz]
so grab your Precision Alignment, set to coordinate center
Point 1 on teh first wheel, 2 on the second
I placed the point 2 keeping Shift pressed [Create the point on the next slot]
right click the first wheel, R -> rotation
get it to
90 on the yaw
second wheel, do the same
( I will need you later )
Back on the 1st wheel
grab his point1 that was on coordinate center and
let's try with
36
right, now we need another
point on the body
this is Point3
i will move him on the body
-48
-9
grab the first wheel
Point 1 to Point3, Move
ok
Wheel 2
Right click the second wheel
-36 hopefully
We got them in place
Now what we need to do is create the
ball socket from the wheel to the body
on the 1,2,3 position
1ST wheel -> constraints -> Ballsocket
Point 1 and point 3
3 is the body, 1 is the wheel. Check the Nocollide
since sphericals do have big collisions
so they need to be nocolliding with
the body.
I don't like to nocollide to everything
as it gets crappy and can't slam on other cars
--Force 0 and
torque 0
Click to ma your first ballsocket
Let me check that the wheel is not bugged
yes it its, Undo the constraint
[Refer to the left scrolling text]
[Refer to the left scrolling text]
Reset his rotation
This sometimes happen with makespherical on the first interaction
the wheels do reset they 0,0,0 rotation
then you need to
rotate them again
[Refer to the left scrolling text]
[Refer to the left scrolling text]
[Refer to the left scrolling text]
[Refer to the left scrolling text]
[Refer to the left scrolling text]
check if that's working
yep, here's our axle
as you see the wheel can go forward and backward
Grab your precision alignment
move the body point
this is on -48, in length
we can try -30
too few
-24
yep, that's it
now back to the wheels, reset your points
to the origin of each wheel
Grab Constraint
-> Rope , make it rigid
set length to 0 (automatic)
size of 1,2 or 0 how you like
First wheel to the body, Second on the body
so now we have this
swing axle without this suspension
(( beep ))
Ok, now we delete point 3
retain point 1 and 2
place 2 more on the body
like point 4 and 5
Grab your first wheel
check that point 1 is on
0-0-0
and point 4 should be on
0-0-0 + Height
like 17
yes 17 is ok
and you can see that the point 4 is just above the wheel
(those are sprops wheels)
but they are (points)
referred to the body
so let me just move
it a little bit inward
as you saw the swing axle
moves in a circular way, so in this way
the dampener is more effective
it is a little bit tilted
I do the hidraulic
so short because
long hydraulics are needed if you won't use the rope limiter
on second wheel
just the same, -4
They should look like this
Now I'm doing the hydraulics, so i'll show you
how do you do precision hydraulics
wheel to the body
wheel, then body
the controller here
second wheel the same, controller here
You do have just 1 chance to do the precision right
else it is very likely to broke your hydraulic
and you will need to remove both the controller
and press R, reset the hydraulics on the wheel
SO, as I said
grab precision alignment, select the controller
of the first wheel
constraints -> wire hidraulic
Point 1 to Point 4
I usually make hidden hydraulics
setting it to 0
just because this is a tutorial
I'll set it to 1 so you can see it
so the hydraulic now should be from the center of the wheel, to
the point 4
same on wheel 2
be sure that Point2 is on the wheel and 5 on the body
let's test the hydraulic
You can see that the suspension is working
much tom he hates only eats i mean silly
the hydro is just unlinked and floppy
I do have a small E2 here
you will have an interval, that refresh the chip every
800, that's is a bit less than a second
I did have
three outputs, HL, HC, HD
I can it not be a headband it DUP the
if ( dupefinished() )
[the contraption has finished to spawn itself]
reset() the chip [so basically sets the hydraulics again]
[else if you don't do that you will to manually]
[refresh the chip after spawning]
if ( first() )
[if the chip runs for his first time]
[after he dupefinished]
set HL to 15, HD to 500, HC to 800
but here i have a Hydraulic length of 17
so i'm gonna do a HL of
19*
Length is the preload
Damping is Damping
Constant is the stiffness
stiffer suspension -> stronger
now wire everything
now wire everything
let me set the weigths
Weight tool
the body might be 150, quite heavy
the whels were 100
but I don't need them so big
I'll make 30
the front one 50
alright now you see the suspension is working
i'll show you if i change from
HC 8000
to 12000
the suspension is a lot stiffer
revert this
I'll set the damping from 500 to 100
look how it became soft
more damping
makes the suspension more sporty
but if you do it too high for the weights
your contraption will be likely to spaz
I'll now set length to 25
so the body raises himself
You do use these suspensions
when you're fighting with advanced ballsocket
or you wanna do old styled vehicles that used swing axles
or small vehicles like the Piaggio 3 wheeler (Ape)
Now the limiter: from 17
we want the wheel to tilt upwards
till this point more or less
( that's not beyond flip-point )
like that
so a length like 6
Grab your Precision Alignment
replace the points
1-2 on wheels
4-5 on body
move the points 4-5 on the wheels
I do not want the wheel to go past a certain point
but I want the wheel travel further down
So do place the
point 4 on -1
like that
First wheel -> constraint -> rope
Point1 to Point4, Not rigid
I do usually hidden this
i'll make it 1
I want that my
wheel goes 9 upwards
so i shoudl have a set length of 1 already
so i'll make it 10
second wheel the same
See the small rope
so you can see it goes down like that
it's not going down more!
the rope is locking it
Goes up like that
The suspensions does not flip
they might ground slamming them
but they self-recover usually without interaction
And you will not see your car with suspensions
thank you for watching, stay tuned for more
I will be doing an ACF motorcycle one soon
This suspension is not for sissies
exactly like building seriously
yes