The Magnificent Banana

[neontetra23]

My Father and I are planning to build a robot: The Magnificent Banana:
Shape: See pic ( Pic on profile, sorry about quality, theyre awful)
Colour: Yellow with a black stripe
Speed: 20MPH
Weight: 100KG
Armour: ?
Drive: 2 LEM130s @ 36V
Power: ?
Locomotion: 2 Wheels near the rear of the robot
Ground clearance: 0MM at front, Varies at sides, 1MM at back
Turning circle: 0
Dimensions: ?
Weaponry: A large flipper powered by 2 120X180 Pneumatic rams @ 1000PSI
Srimech: The flipper
Opinions, help, a DVD of the RR 2006 UK championships

[Guest]

The Magnificent Banana

large flipper powered by 2 120X180 Pneumatic rams @ 1000PSI

I think the highest operating pressure you can get for co2 is 725psi pr 750psi

[tunna]

The Magnificent Banana

Boyles Law,

Der Boyz

[neontetra23]

The Magnificent Banana

Fine 750 PSI, but what about nitrogen

[maddox]

The Magnificent Banana

Nitrogen is removed from the rules, only CO2, or compressed air on low pressure.

Also, a 120*180 ram is at least 12 kg, if a commercial available ram is used. And delivers on its own 1.5 times more power than a 100mm bore ram.
With 2 of these gasguzzlers, youre emptying a 2 kg CO2 bottle in 2 actions. And then the question of valves. Each one will need a 1 bsp or equivalent inlet valve (meaning 4 burkerts =2.5 kg at least).

Then the LEM130s. Youll need a boatload of batteries to provide the power, and then deal with it.

A nice vaporbot, unless you got acces to aboutish £50 000.

[neontetra23]

The Magnificent Banana

Ok 1 ram and NPC 2446s

[neontetra23]

The Magnificent Banana

New Pic on profile

Size: 120X80X25
weapon is powered by a 5KG Co2 tank
Armour 3MM Hardox

[neontetra23]

The Magnificent Banana

Ive just checked the Fra rules and the max operating pressure allowed for pneumatics is 1000PSI

[geeza]

The Magnificent Banana

Correct, but in reality you cant compress C02 past 750 psi as this is when it becomes a liquid. You can compress a liquid a small amount but there is no advantage to do this as it wont get you any more power.

[woody]

The Magnificent Banana

The pressure of co2 in the main tank / cylinder is temperature dependant.
You may get 1000 psi on a hot day....and then only in the main tank ...extracting gas ... as in firing a ram ... has a cooling / freezing effect and will cause the pressure to drop dramatically.

[terry]

The Magnificent Banana

are you using a 5kg as the main tank ?
Im quite sure no one uses more than 1 2kg for
a main tank except an old iron awe ? gilbert ?
and nearly everyone uses 1 2kg for a buffer
and they are powering quite large rams to.
I think you can lose a lot of weight here.

[craig_anto]

The Magnificent Banana

Beast uses a 5kg bottle

[terry]

The Magnificent Banana

Craig, does beast have a much larger ram bore/stroke, and how many flips do you get per 5kg bottle or how much on average left over after a fight ?

[craig_anto]

The Magnificent Banana

Beast isnt mine, I jus know it uses a 5kg Bottle John Lear or LJ will be able to answer u beast I mean best

[maddox]

The Magnificent Banana

Beast uses a 100mm bore ram, with an adjusted stroke of 200mm.
Full ali construction.

And there is a reason I know.