|
Project:
Designing and Making your own Cantilevers
If
you are new to cantilevers and have no idea how they work or even
what they are, it is strongly recommended that you first read my
related info about cantilevers
in my FAQ section.
I.
Design Concerns
Now that you understand the principle behind how cantilevers work,
you know the important aspects to keep in mind for your designs:

1) (A) must
always be greater than (B). Most guys begin with a simple 2:1 ratio
which means that (A) will be twice as long as (B). A good starting
point would be for (A) to be 2" and (B) to be 1". Note
that the longer (A) is compared to (B), the more travel you will
create, but too much travel can result in a suspension that is too
soft. Moreover, they may result in so much travel that the cantilever
rods may hit the chassis on compression
so go easy on those
measurements and experiment slowly.
2) Consider
how your cantilever will mount to the chassis. You will want to
create a smooth pivoting point and this can be achieved in several
different ways. You will probably need to consider different systems
of washers, spacers and screws. I can't help you much here since
there are so many different ways to do this, although you can click
here to see an example
of how my cantilevers are mounted.
3) You may need
to alter your designs as you go along. For example, the cantilever
may need to be re-shaped a little to accommodate the shock (especially
the lower spring holder). You may even wish to relieve the project
(cutting some aluminium off the cantilever) to make the cantilever
lighter
be innovative!
4) The main
parts of the cantilever all have to be there, but the cantilever
need not be triangular in shape. Design the cantilever to suit your
needs.
5) Some guys
run cantilevers only on the rear of their trucks. I've not tried
this myself but they claim that it helps their trucks to jump better
- and prevent nose-diving. My truck has not shown the tendency to
nosedive, but if yours does, you may wish to consider this setup
6) If you plan
on using bearings, then you will have to find some way of holding
them in place. You can visit Planet
Clod for one setup - the author 'encases' the bearing in the
cantilever. Alternatively, you can follow the setup shown here
that uses flanged bearings. 2 tapped holes on the cantilevers allow
screws to hold the bearing (on the flanged edge) in place.
Here's a side-view
of my truck that shows how the cantilever setup looks.

II.
Making the Cantilevers
It is not my aim to provide you step-by-step instructions to how
to make my cantilevers. Besides, It's hard to do so because
your designs might be totally different from mine. But here are
some tips you can use to make cantilevers for any of your trucks:
1) If you can,
clamp all the cantilevers together and you can work on all your
pieces at the same time. This not only saves time but also produces
identical pieces for all 4 ends (or 2 if you are just making a pair).
2) Sometimes
it's hard to clamp the work together cos they are pretty small.
You can carefully drill one hole (or two holes) in each cantilever
at the same points and then run a screw through all the pieces and
tighten everything together with a nut. Same effect as clamping,
but perhaps neater and easier to work with.
3) Work carefully
and you will be rewarded. Cantilever setups - in general - always
have more slop than hooking the shock directly between the gearbox
and the chassis because of the many moving parts involved. However,
you can minimize that slop if you drill your holes clean and accurately.
III.
Closing Comments
There's of course more to cantilever design and production, but
I hope that the information here proves helpful. Look around at
different cantilevers others have designed, they can be a lot of
help. Always be willing to ask questions and you'll save yourself
time and effort by learning through others' mistakes. Remember that
parts don't always turn out as great as we hope they do (although
sometimes they turn out better), keep trying and don't forget that
FUN is the name of the game.
|