3-Wheel Buggy

[Groomi]

Hi All, I'm new here having searched the internet for a forum where people design and build their own r/c cars. Some great projects on here!

Over the next 12 months I'm intending to build a 3-wheel buggy just for the fun of it (and the design has been mulling around in my head for years). I'll be using Schumacher internals from either my Procat or Bosscat and adapting the belt drive to suit the 3-wheel layout.

Why 3 wheels? Well I'm interested to see just how lightweight a buggy can be and following the old Lotus adage 'less is more' it seems worthwhile to look at losing 1 wheel and all the adenda associated with it. I'm hoping some careful design can overcome most of the stability sacrifices, but time will tell!

Although I'm doing this for fun it would be interesting to race it when it's finished to compare to a normal 4-wheel buggy. Would any local level race meets allow such a machine to compete?

[Spoolio]

Originally Posted by Groomi

...following the old Lotus adage 'less is more'...

Yes, as in "less [time spent building it properly] is more [warranty claims]" .

However, your project sounds intriguing - post pics when you have some. I assume you'll be going with a trailing wheel layout rather than a leading wheel (Reliant Robin-esque) design and will it be 3WD as well (otherwise I foresee immense traction problems). If you go 3WD you may win all your classes as you'll be the only runner. Probably.

[Groomi]

Ha ha, no comment on Lotus build quality!

Yep, definately going for 3WD, 2 up front and 1 behind. The intention is to design and build it as a 3WD buggy and then after a bit of fun and development making a follow-up rear drive only tarmac special. As you say, traction will be a problem, but the potential extreme light weight and drag efficiency advantages 'may' make it worth it.

If both cars prove to be hopeless, at least I will have answered the question that's been filling my mind up for years!

[Groomi]

Thinking a bit more about this last night and decided that I should concentrate on the unique part of the concept (ie. the rear wheel/suspension/transmission assembly) first. So I've decided I'll make a development model first using the entire front end from the Procat and then making a simple chassis which enables the unique rear assembly to be played about with and also give me freedom of packaging the batteries and radio gear to find the best weight distribution.

This model will be the 'proof of concept' before putting more time and effort into a proper version utilising some fancy chassis and body ideas I have, together with a much uprated front end.

Will try and post some sketches up in a few days and will update with (slow) progress.

[Mike Hudson]

sounds funny but interesting, you should have made it 2 wheels at back and 1 at front like a reliant robin so it rolls when you try a hairpin at speed

[mark christopher]

got to look at a rear swinging arm such as a motor bike