Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
hmm thinking for your bike jousting you could just buy a chinese cag pocketbike for $100 off ebay (or well cheaper) and get at least a complete running bike with an auto clutch. just have to automate it.
and we could have RC bike races haha. that would be awesome havving an rc bike that you can sit on and have someone else control it. i may just do that for laughs anyway
He's fixed the handle bars though.
The forks have a certain amount of trail, which will make them steer when the bike leans.
Have you ridden a bike no hands? I used to be able to ride around a whole track no hands on a dirt bike, leaning to steer.
Lindsay used to have an R/C motorbike which steered entirely by weight shift. If you're doing weight shift only you're better off with some extra trail vs a normal bike, but it's definitely doable.
Doing proper countersteering with R/C is a lot harder because you don't get the physical feedback you have when you're on the bike. _________________ The Engine Whisperer
- fixer of things
Mon May 17, 2010 12:59 pm
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
I'm thinking we should try and keep it to something fairly simple and against a clock or something like that.
jousting involves getting 2 non reliable contraptions moving and actually being able to hit each other, that sounds like a tough job even with all new parts.
Perhaps we should look at a "mini challenge" to warm up.
tabletop trebuche perhaps?
lob a cricket ball as far or as accurately as possible say? _________________ Mechanical engineers build weapons, civil engineers build targets
Mon May 17, 2010 1:23 pm
Dylon
Joined: 09 Nov 2006
Posts: 631
Location: Newcastle, NSW
i sense too much overthinking going on
don't want to make things too complicated, it is meant to be a fun change from robots.. ie less stressful
simply a budget that need to stick to.. test everyones scrap salvaging and bargaining abilities.. _________________ Barton Robotics Youtube Channel:
https://www.youtube.com/user/dyl30
Joined: 30 Sep 2006
Posts: 673
Location: Perth, Western Australia
or on a slightly larger scale, a trebuche for a basketball and use it to play a game of ghost. _________________ They say that he crossed the fine line, from insanity to genius.
Mon May 17, 2010 5:31 pm
Valen Experienced Roboteer
Joined: 07 Jul 2004
Posts: 4436
Location: Sydney
hmm RC basketball
only problem is its not Australian enough ;-> _________________ Mechanical engineers build weapons, civil engineers build targets
Mon May 17, 2010 5:44 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
A mini trebuchet would be excellent. Let's just keep the rules to this:
Standard ammo is a cricket ball (easy to get, not too heavy)
Maximum arm length of 1.5m (up for final decision)
Maximum budget $100 AND each team has to document their materials & costs.
That should be easy to stick to and is enough to make the competition fair; the winnesr will need to have good design and building skill to win. Let's leave the materials, weight, etc completely open to encourage innovation.
For safety. I propose we find somewhere with a very long open space and we do a safety test fire with a much lighter counterweight. Devices must be operated from at least 4 metres distance and out of the line of fire.
Mon May 17, 2010 6:53 pm
Fish_in_a_Barrel
Joined: 30 Sep 2006
Posts: 673
Location: Perth, Western Australia
quote:Originally posted by Valen:
hmm RC basketball
only problem is its not Australian enough ;->
quote:Originally posted by Nick:
Standard ammo is a cricket ball (easy to get, not too heavy)
So RC cricket
best of 3 Overs? _________________ They say that he crossed the fine line, from insanity to genius.
Mon May 17, 2010 7:31 pm
Glen Experienced Roboteer
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
quote:Originally posted by Nick:
A mini trebuchet would be excellent. Let's just keep the rules to this:
Standard ammo is a cricket ball (easy to get, not too heavy)
Maximum arm length of 1.5m (up for final decision)
Maximum budget $100 AND each team has to document their materials & costs.
That should be easy to stick to and is enough to make the competition fair; the winnesr will need to have good design and building skill to win. Let's leave the materials, weight, etc completely open to encourage innovation.
For safety. I propose we find somewhere with a very long open space and we do a safety test fire with a much lighter counterweight. Devices must be operated from at least 4 metres distance and out of the line of fire.
Beat *that* fast-bowlers ! _________________ Great minds discuss ideas. Average minds discuss events. Small minds discuss people
Mon May 17, 2010 10:36 pm
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
god that's horrifyingly scary
Mon May 17, 2010 10:49 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
Um, I have some design sketches for a small pitching machine. Its more of an electric ballista, launches 25mm arrows. With two Mag C40 motors @ 36V and 10" wheels, it has a theoretical launch speed of 180 mph.
Mon May 17, 2010 11:03 pm
Nick Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
So that looks like the mini challenge is on - I don't see any dissentions
Next thing to decide is when to hold it; I suggest we officially start right after the June 26th event and finish July 24th with the competition day. That fits between events and gives 4 weeks for building.
Before we pick teams, How many people are going to get involved - it would be nice to have 4 builders per team, but for a mini challenge, we can go with 2 or 3.
When you register for the mini challenge, please list the top 2 or 3 skills you can apply to making a trebuchet - something like "Nick - Machining, Carpentry"
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