Bell Crank Suspension

As previously mentioned I’ve used off-road motorbike rear shocks and bell cranks. I plan on having bell crank suspension both front and rear.

Most Haynes Roadsters or Locosts have outboard coilover shock absorbers. Some people think that going inboard with shock absorbers is all about sprung weight, aerodynamics and looks. There is far more to it than that. By using cantilevers, the spring rate can actually be increased the more the suspension moves. Much the same as adding an anti-roll bar does. Wide spread usage on race cars and motorbikes since the 70’s suggests it’s worth investigating.

I’ve not changed a lot here, basically some of the tubes have been angled or triangulated, some of the brackets have been shortened and one extra brace added. I’m no expert at FEA (I just go by colour), but there are now no areas at the rear that show significant flex. Ages ago, I modelled the standard rear end and that seemed ‘OK’, but without adding much weight I’ve gain significant rigidity.

The aim is to get a rising spring rate during roll – see Cantilever Suspension

A lot of motorbikes have some quite pretty, lightweight and strong bell cranks. They have needle roller bearing and really look the part (Haynes Roadster Bling!).

DRZ400 Motorbike - Bell CrankDRZ400 Bell Crank CAD

If you chose a coilover shock from a off-road motorbike the spring rates will be far closer to what you can use on a road car (roughly 300lbs). Sports bikes have spring rates approaching 1000lbs!

For the rear (where there is more room) I have gone for so rather large DRZ400 shocks. They’ll be too big for the front, so I’m still looking for suitable front units.

Push Rod Cantilever Suspension

The Push Rod Rear Suspension is almost done. With the arrival of some nearly new AVO coil-overs the big old DRZ400 motorbike shocks were consigned to the parts shelf. I know I'm into Haynes Roadsters now, but I was looking at a feature on Geoff Cousins latest creation. He's a ...

Kit Car Push Rod Suspension

The Push Rod rear suspension is now being mocked up - ready for assembly. The rear hubs will be removed a welded on a jig as will the upper and lower arms. Although much work has been done; powder coating parts, assembling the brand new c.v. joints, shafts and ...

Haynes Push Rod Suspension

The rear suspension features rising spring rate, pushrod suspension. It's all mocked up here with dummy push rods etc. Read more here. The idea being, the more the car rolls, the higher the spring rate seen by the wheel. It's what the formula 1 boys do. However, here are my problems: ...

Locost Push Rod Rear Suspension

I've finally got around to making the Push Rod Rear Suspension. (NB. I'll use lock nuts on final assembly) For some reason, I think it was a lack of threaded inserts, I hadn't made the push rods. This meant that the car could never be put down on it's wheels. ...

Push Rod Suspension

The Push Rod Cantilever Front Suspension is one step further. It's by no means complete as most of the brackets are just tack welded in place and I don't even have the right sized bolts for some of the joints. But so far, everything is going pretty well. As you'd ...

Fully Adjustable Rear Suspension

I had a month out from blogging, but that didn't mean I was idle. Everything I had done on the rear suspension had been removed, re-done, then tweaked, then modified and finally mocked up before I went ahead and fully welded everything. The first problem I had was I wanted ...

Kit Car Rear Suspension Mounts

The decision was made not to make a suspension jig for the rear brackets. It was slow work and I have burnt fingers, but I'm pretty chuffed. I was going to make a suspension jig on the bench, where I could carefully measure, then re-measure every bolt hole, bracket and ...

Anti Squat Rear Suspension

Making & welding the rear suspension brackets has been slow. What is Anti Squat Rear Suspension all about? When you plant the pedal at the lights or accelerate out of a bend, weight is transferred to the rear of the car. The front wheels lift and loose traction and the ...

Translate »

Web Design by Go Web Solutions