[TC27] Crash cushion truck.

[ukbajadave]

I've wanted to do one of these for a while and even mocked some stuff up using the classic 62.4x20 tyre. By entering the contest I'm hoping to push myself a bit with the smaller scale and give myself the incentive to finish a build 

As per the rules here are some pics showing actual progress (a little)

The chassis is bare bones and easy to resize so I can play about with wheelbase and track. It's going to be longer I think. I might try and look at prototype vehicles for a rough scale.

It's not going to be RC so no drive or steering motors. Just HOG steering and then 3 or 4 functions. The gearbox appeals to the Technic in me but pneumatics might give me more control over speeds.

More progress soon I hope.

This sort of thing

Edited July 8, 2024 by ukbajadave
Typo

[ukbajadave]

Update. I tend to build mechanisms in isolation and then connect them so I made a fun leaf spring rear axle and a basic front axle and joined them together.

Then started work on the sign board getting the range of the pneumatics right.

Did the same for the crash cushion.

At this point (due to the fact I build things piecemeal) it becomes apparent that the rear axle and crash cushion mount collide and a single large cylinder is not beefy enough to raise the heavy cushion. Also I now realise I've put the sign where the lightboard should be. Good job the deadline is September 

[efgen86]

The rear axle is very interesting. Are you planning to use a differential?

[ukbajadave]

58 minutes ago, efgen86 said:

The rear axle is very interesting. Are you planning to use a differential?

There's no real need as I'm not motorising the drivetrain. I fear the axle may have to go in order to make room for the pistons. 

On the other hand perhaps I should push myself to find a solution rather than the easy option.

[Paul B Technic]

That is a very interesting truck to build, I have never seen one of these in technic before.

[Jurss]

That sign looks good.