Soapbox Racers

Wanna talk about something other than robots? Really?? Can't understand it myself, but if you really want to, do it here....normal rules apply though!!

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peterwaller
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Soapbox Racers

Post by peterwaller » Sun Apr 26, 2015 9:10 am

Here is a wheel I have bought for my latest project.
Image
I think I must have got the decimal point in the wrong place.

suvv
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Re: Peter Wallers Robot Ramblings

Post by suvv » Sun Apr 26, 2015 12:55 pm

i can see you spending a long time drilling holes in that to get it in weight ;) mutant looks awsome i really hope i dont ever have to take it on...ever
how hard can it be???
Robots: Optimistic chances of self decimation (ant), Super generic box ant that everyone builds yehhh (ant)

Max
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Re: Peter Wallers Robot Ramblings

Post by Max » Sun Apr 26, 2015 1:56 pm

Let me guess you've now got so many robots that you are building a wheelbarrow to move them to and from the robot check in desk?

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joey_picus
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Re: Peter Wallers Robot Ramblings

Post by joey_picus » Sun Apr 26, 2015 5:18 pm

If you are building a bigger robot, a) may the gods help us all, and b) no tracks this time? :(
Joey McConnell-Farber - Team Picus Telerobotics - http://picus.org.uk/ - @joey_picus
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peterwaller
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Re: Peter Wallers Robot Ramblings

Post by peterwaller » Sun Apr 26, 2015 6:25 pm

Not a robot, my Son-in-law has persuaded me to help build a SoapBox Derby vehicle for a local event. :roll:

suvv
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Re: Peter Wallers Robot Ramblings

Post by suvv » Sun Apr 26, 2015 9:14 pm

and as soon as the derby is over he will be in the shed making it fully rc and driving around the garden
how hard can it be???
Robots: Optimistic chances of self decimation (ant), Super generic box ant that everyone builds yehhh (ant)

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earthwormjim
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Re: Peter Wallers Robot Ramblings

Post by earthwormjim » Fri May 01, 2015 11:45 am

That's weird, Peter. I am currently building one too!!

Image
Image

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peterwaller
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Re: Peter Wallers Robot Ramblings

Post by peterwaller » Fri May 01, 2015 3:48 pm

That's a lot more sophisticated chassis than ours and much shinier too.
Ours is a flat bed chassis (bed frame bits ) the wheels look about the same diameter and the steering is all home made by me and a chap call Heath Robinson.
The only shiny parts are the wheels and the bike disk brakes on the rear.
I would put up some pictures but my son in law wants the design kept under wraps.
So far it has taken about 4 weeks to get a rolling chassis although the brake cables are yet to be connected to the pedal.
Is yours for a specific event, I have been suprised by how many events there are for this type of vehicle.

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earthwormjim
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Re: Peter Wallers Robot Ramblings

Post by earthwormjim » Fri May 01, 2015 4:36 pm

I love a bit of Heath Robinson! I took the opportunity to teach myself how to weld, hence the over ambitious shape. I have been inspired by the SFVISBF, the San Francisco something illegal soap box federation videos on youtube, which I have been watching for ages. Now my son has entered us into the red bull event in London in july. We havnt heard back yet, but I thought it would be handy to have one anyway!!! If nothing else, I am glad that I can weld now (not very well.)Ours is supposed to be a 60's racing car, a la Graham Hill era, Lotus 48 kinda thing. Well, that's what we are aiming for, anyway!!

They look like great fun, some of them are unbelievable, Lotus and Bentley have some amazing carts out there.
Would love to see some pics Peter. The difficult parts are definitely the steering and brakes, but who needs those, well, maybe a little bit of steering would be handy!! :D
Image

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Re: Peter Wallers Robot Ramblings

Post by Occashokka » Fri May 01, 2015 4:43 pm

I know this is a bit hijacking the thread but do you know if they have put tickets up for the London event (I take it you are referring to the red bull hosted one at ally pally)as we have seen some on Tele and can't wait to go see them
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peterwaller
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Re: Peter Wallers Robot Ramblings

Post by peterwaller » Fri May 01, 2015 6:15 pm

I don't know much about the RedBull event my son in law wanted to go for that one but I thought it better to start with something a little easier.
Besides I am not sure Our team would be acceptable seeing it is called the PinkCow team because PinkCow gives you wind. :roll:
I have a bit of trouble getting my head round what is strong enough we started looking at M10 studding for the rear axel but have now moved up to M16.
The Aylesbury event is on 21st June (Fathersday) and having checked out the venue it looks fairly gentle but there are many other events we could enter assuming it works correctly.

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Rapidrory
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Re: Peter Wallers Robot Ramblings

Post by Rapidrory » Fri May 01, 2015 6:21 pm

Careful; all this talk of building soap box racers is making me want to join in! I've got a ton of parts that i could use for one, but already have way too many projects on atm :P
Rory Mangles - Team Nuts

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Re: Peter Wallers Robot Ramblings

Post by razerdave » Sat May 02, 2015 9:57 am

You're not the only roboteer trying to enter the redbull event, Krissy (Schumey, Rybot, and various others) is making one too :)

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earthwormjim
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Re: Peter Wallers Robot Ramblings

Post by earthwormjim » Sat May 02, 2015 10:52 am

Wow, small world! Yep, I think for most events, 20" bmx wheels seem to be the best option, but for the Red Bull event, something sturdier looks to be wise. We have 14" wheelbarrow wheels, with roller bearings, we are planning to pump them up as much as possible to decrease the rolling resistance as much as possible. Asfar as strength goes, Belt and braces seems to be the way to go, because of the jumps, and banked sections that they like to put in!! The event has an 80kg weight limit, without driver which doesnt seem too bad, I reckon I can get some suspension in and still keep it under the limit. It is a very tight squeeze in there though!! According to an email I got, tickets went on sale yesterday, 1st May. Available from ticketmaster.
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peterwaller
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Re: Soapbox Racers

Post by peterwaller » Sun May 03, 2015 9:00 am

Actually had it moving yesterday and it wasn't too bad.
The steering was very positive if a little sensitive but no slop but the column needs a bit more support at the top.
The brakes were a little weak as I had backed the pads off too far to ensure no slight rubbing and we wern't getting enough pressure.
Also there seemed to be more rolling resistance than hoped for but I haven't got the tyres up to full pressure yet.
We have added two diagonal members from the chassis at the front up to about shoulder high on the driver to give some side prtection and help support the pusher handles at the rear. (In the aylesbury event you have two pushers to get you started.)

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