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Tug of War


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Rotwang
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Joined: 15 Jun 2004
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Tug of War

Just thinking about the tug of war ideas that have been floating around in the competitive but not primarily destructive fringe of out sport.

The thing I think needs decided is the height above the arena surface for the attaching point for the towing cable.

Does anyone know if such a rule already exists?

Would need a bit of tolerance, min and max.
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Post Sun Aug 16, 2009 12:03 pm 
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Nick
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Not having seen any rules for this, I'd say either leave it up to each competitor or make it the axle hight on each bot. If there was a rule about an exact hight for the hitch, it would limit builder's creativity for new designs.

Post Sun Aug 16, 2009 3:00 pm 
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chrisjon65
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Very Happy Ahh see the issue here.
A robot that has the rope hitched higher up has a diagonal lift advantage.
The robot with the higher hitch point would in jerking movements possibly lift the opponent in some way
if a steel plate with a pulley welded to it is placed in the middle with the rope going through it this should stop any lift advantage.If thats what it was regarding.Therefore the hitching height isnt an issue
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Post Wed Aug 19, 2009 7:59 am 
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Rotwang
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Exactly.
If your opponent has really sticky tires, vacuum ground effects, nib magnets, huge power etc that’s all fair and part of the fun.

Just worried that if someone turns up with a 6 ft dragster with all the weight in the nose and a 3 ft high hitch people might start thinking unfair.

The size of the arena means the rope cant be too long, whoever has the highest hitch gets an advantage if they set their weight up right so it could quickly turn into a highest hitch rather than a lowest wedge contest.
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Post Wed Aug 19, 2009 7:23 pm 
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shreddy



Joined: 09 Jan 2009
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i always thought it would be best to have the mount as low as possible right in the middle, pulling all 4(or possibly more) wheels down.
wouldnt high mounts just pull the bot over?
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Post Wed Aug 19, 2009 7:26 pm 
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Knightrous
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Instead of Tug-O-War, why not make it a pushing contest instead (like the sumos). Just make each robot have a flat vertical pushing panel on the front. Saves all the dramas of specifying hitch heights and rope lengths.

Wack some NIB magnets between them and you've got a setup that holds both bots together for an all out pushing match.
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Post Wed Aug 19, 2009 7:40 pm 
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dyrodium
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Sounds like a boring way to explode escs...
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Post Wed Aug 19, 2009 8:24 pm 
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Nick
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Yep, that killed off that good idea Laughing

Post Wed Aug 19, 2009 9:34 pm 
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Glen
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have we learnt nothing from the indian tech fest. tether control! Laughing

chris' idea of having a pulley somewhere to alleviate the height of the hitch is probably as good an idea as any.

is it bad that within 10 seconds of reading the thread i instantly thought of using a flywheel somehow Sad
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Post Wed Aug 19, 2009 9:44 pm 
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seanet1310



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no glen not at all
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Post Wed Aug 19, 2009 10:33 pm 
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Knightrous
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quote:
Originally posted by Glen:

is it bad that within 10 seconds of reading the thread i instantly thought of using a flywheel somehow Sad


I thought about using a tuned chainsaw motor Very Happy
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Post Wed Aug 19, 2009 10:44 pm 
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dyrodium
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Haha, remove standard electric controls, things start to get interesting. Wink
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Post Wed Aug 19, 2009 11:10 pm 
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Rotwang
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A pulley in the center would stop the low bot getting lifted but the high bot might still get an advantage getting weight from the pulley.

As in the pulley will won’t to come up, it can’t so the high bot gets more weight to plant the tires.
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Post Thu Aug 20, 2009 7:21 am 
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