
Soapbox tech
Re: Soapbox tech
Well that was a late one :-/
Rebuilt the rear uprights in thick ply after shakedown showed them flexing (!). Thanks Woody!
Shortened the chassis side rails to allow a better turning circle.
Rebuilt the front axle steering pivot with broader plates / washers (thanks Ferg!)
Experimented with steering self-centering, aka bungee straps LOL.
Worked out a braking concept. But that is def for later.
Strengthened the fixings for the chassis backbone to cross members.
Yawn. Next shakedown tomorrow.
Rebuilt the rear uprights in thick ply after shakedown showed them flexing (!). Thanks Woody!
Shortened the chassis side rails to allow a better turning circle.
Rebuilt the front axle steering pivot with broader plates / washers (thanks Ferg!)
Experimented with steering self-centering, aka bungee straps LOL.
Worked out a braking concept. But that is def for later.
Strengthened the fixings for the chassis backbone to cross members.
Yawn. Next shakedown tomorrow.
http://www.rathmhor.com | Coaching, training, consultancy
Re: Soapbox tech
Good efforts Campbell - although I'd say good castor angle would be a better way to self centre than some bungee... 

2010 Honda VFR1200F
1990 Honda VFR400 NC30
2000 Honda VTR1000 SP1
2000 Kawasaki ZX-7R
1990 Honda VFR400 NC30
2000 Honda VTR1000 SP1
2000 Kawasaki ZX-7R
Re: Soapbox tech
Is that the diff between distances across leading edges and trailing edges of 2 wheels?
http://www.rathmhor.com | Coaching, training, consultancy
Re: Soapbox tech
Sort of. Not sure how you'd build it into your steering set up though.
Also not sure what I contributed, but you're welcome.
Also not sure what I contributed, but you're welcome.
Re: Soapbox tech
Are you using a single central steering pivot point? I think you could put some castor into that setup by moving the pivot forward of the line of the front axle. You probably don't want too much as it will get a bit 'swingy' to steer.
I like ths bungee concept for single pivots return to centre...
I like ths bungee concept for single pivots return to centre...

Re: Soapbox tech

We have begun, I drew this out to Scottish cartie regs. No welding, going to be bolted to 18mm marine ply. IKEA plan, I might have to prep some bits tho
Not sure we will make the day, but Loon was loving the assembly... Should get steering assembled tonight, has castor and offset kingpin.
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S2 111s
Re: Soapbox tech
Yep central pivot, currently in line with axle. Not impossible to change but fair list of further essentials / refinements / luxuries to tackle first. In that order!!
Shakedown #2 tonight was very successful. Several laps of the Team FMC test track loop and revised uprights are good. One wheel at jaunty angle cos I can't drill straight but that's character.
Seat mounting next.
Then brakes
Our Design Studio has also commenced styling work. Batman theme here too, Ferg. Costumes have arrived =8-o
Coach work looks like being next week. At worst, I'll slap some bat stickers on it and dock Lisa's fee, lol.
Shakedown #2 tonight was very successful. Several laps of the Team FMC test track loop and revised uprights are good. One wheel at jaunty angle cos I can't drill straight but that's character.
Seat mounting next.
Then brakes

Our Design Studio has also commenced styling work. Batman theme here too, Ferg. Costumes have arrived =8-o
Coach work looks like being next week. At worst, I'll slap some bat stickers on it and dock Lisa's fee, lol.
http://www.rathmhor.com | Coaching, training, consultancy
Re: Soapbox tech
Ian, looking good. Put the hammer down and get there 

http://www.rathmhor.com | Coaching, training, consultancy
Re: Soapbox tech
campbell wrote:Ian, looking good. Put the hammer down and get there

Re: Soapbox tech
Unfortunately i am stupid!
Loving what you guys have done, kids suitably engaged/enjoying? Campbell in a kids batman costume... Make sure you don't get arrested...
Seriously though, love the spirit Campbell and Ferg, good work, I know I am letting the side
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Loving what you guys have done, kids suitably engaged/enjoying? Campbell in a kids batman costume... Make sure you don't get arrested...
Seriously though, love the spirit Campbell and Ferg, good work, I know I am letting the side
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S2 111s
Re: Soapbox tech
Just did a bit of Googling and did you know there is a race series for soap box derby in the UK and there is a Scottish cartie association. This is serious stuff, there is a Halloween race in Brechin later in the year.
Elise S2 260
BMW M2 Comp
RRS HST
BMW R1300GS
BMW M2 Comp
RRS HST
BMW R1300GS
Re: Soapbox tech
I can see there being a team SE Halloween outing here...!Mikie711 wrote:Just did a bit of Googling and did you know there is a race series for soap box derby in the UK and there is a Scottish cartie association. This is serious stuff, there is a Halloween race in Brechin later in the year.
Re: Soapbox tech
Yes I knew and am steering well clear!!!
http://www.rathmhor.com | Coaching, training, consultancy
Re: Soapbox tech
Mike, got a few pals who do the Scottish cartie series, some of the carts are pretty nifty wih serious time and money spent... Look at the Cairngorms race hit 50mph...
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S2 111s