New build too heavy??

[Guest]

hi, im building my first robot and so far i have almost completed the chassie and it weights about 23kgs, is this too heavy? im gonna enter in as heavyweight upto 100kgs, im gonna use 4 go kart tyres and 2 24v scooter motors and for a weapon im gonna use some kinda flipper, but i want it very powerfull, so just wanna know if ive gone over the top with the chassie by makin it 2 strong and heavy?
thanks

[maddox]

New build too heavy??

Just my 2 cents.

24V scooters and 4 kart tyres are fairly large and heavy.
Large means a lot of armor to protect everything. Armor does weight a lot.

And a very powerfull flipper.... Any idea how powerfull very powerfull is?
A very powerfull flipper uses a lot op power. Most flippers use CO2.
But if youre very creative, a lot of batteriepower.
In all cases, heavy options.

[Kenny]

New build too heavy??

got pics of the chassis??

[Guest]

New build too heavy??

was thinking of using very thick perspex for armour? would this be ok or do you have any other suggestions, i will post some pics of the chassie tomorrow.

[Guest]

New build too heavy??

oh and the flipper i was thinking of somethin like a pneumatic ram, somethin off ebay, what do u suggest for that and what is the max psi i can have it, ive got an idea how to build most of the robot but the flipper i dont really have a clue, so any help would be useful, links, pics, what i need exactly. thanks

[Mouldy]

New build too heavy??

http://howto.killerhurtz.co.uk/pneumatics.htmhttp://howto.killerhurtz.co.uk/pneumatics.htm

http://www.teamonslaught.fsnet.co.uk/tech.htmhttp://www.teamonslaught.fsnet.co.uk/tech.htm

http://www.gt-electronics.freeserve.co.uk/c2/technical/technical.htmhttp://www.gt-electronics.freeserve..../technical.htm

http://www.teamdavinci.com/understanding_pneumatics.htmwww.teamdavinci.com/understanding_pneumatics.htm

Enjoy.

[Guest]

New build too heavy??

they look good, i will have a look thru, if anyone else has more helpful info, just on the general building of the robot, it would be useful, thanks again

[woody]

New build too heavy??

NO Perspex.... It shatters.
Polycarb or HDPE is a better alternative.

[woody]

New build too heavy??

deleted

(Message edited by woody on October 28, 2007)

[Guest]

New build too heavy??

ok, where can i get polycarb or hdpe? (what is hdpe?)

[woody]

New build too heavy??

Heres a link to UHMWPE Ultra High Molecular Weight Polyethylene
Youll find the various descriptions of the shorthand names as you browse the site.

http://www.directplasticsonline.co.uk/home.php?cat=3682http://www.directplasticsonline.co.uk/home.php?cat=3682

Polycarbonate is expensive and Id suggest that youd need perhaps 10mm or thicker.

Heres a link to give you a taste of price ....they dont list the thicker sheet.
http://www.westwardplastics.co.uk/d_selector.php?page=2&cat=glazing&subcat1=Polycarb onate%&subcat2=Clearhttp://www.westwardplastics.co.uk/d_...&subcat2=Clear

(Message edited by woody on October 28, 2007)

[terrorhurtz]

New build too heavy??

Technobots stock half, quarter and 1/8 sheets of Polycarbonate in various thicknesses
http://technobots.co.uk/acatalog/Online_Catalogue_Polycarbonate_Sheet_103.htmlhttp://technobots.co.uk/acatalog/Onl...Sheet_103.html

I would agree with the comments about kart tyres - they take up a lot of space and are easily damaged. About the only benefit they have is that they are easy to build into a robot.

Ground clearance is a significant factor in combat success, particularly in the UK with the number of flippers. The problem with four wheels is that getting low ground clearance is not easy - the arena floors are never flat, so if you run the robot too low, you will get grounded.

Generally easier (and lighter) to use just two drive wheels and have the front of the robot sliding on the ground.

[psycho_fling]

New build too heavy??

the link to direct plastics woody suggested is a very good one. they have a lrage range of stock and are very helpful if you need any help

[Guest]

New build too heavy??

ok thanks for all comments, one other thing im not too sure about is how i can attatch the kart wheels to my robot, as i dont have any hubs etc... because i want to attatch them to a bar with a sprocket welded on, any ideas?
thanks

(Message edited by mjones40 on October 30, 2007)

[swanaldo]

New build too heavy??

i have a few photos on photobucket with kart pics on if thats any help. swanaldo_2007 is the place to look on there.