2.75 inch bore 3.14 inches of stroke
Swept volume of 18.6 cubic inches
Pressure = 750 psi
Work that can be done by cylinder = 13,950lb-in
Divide by weight of bot to be moved 13,950/30 gives 465 inches or 38.75 feet.
A 50% fudge factor in practice seems to take into account losses etc in a flipper.........So 19 feet.
19 holy moly thats great. I would be happy with even half of that! A question has been asked about how strong the arm support and cylinder mount will be... I think it should be fine.. I will have 2-3/4 AL supports that the arm and cylinder will mount to. Here is a pic: http://www.teamwazio.com/c-mount.jpgwww.teamwazio.com/c-mount.jpg
The arm / pivot looks good... not sure if your wheel mounts will take the strain of 4000lbs+ of thrust being applied to a 30lb weight.
It may be desirable to have the chassis flex enough to allow the base to touch the floor .....thus allowing the floor to take a good percentage of the load away from the wheels and mounts.....or perhaps squidgee tyres?
There is also going to be a fair ammount of bending moment applied to the chassis forward of the ram .......it might be a good idea to add a brace of some sort?
You could incorporate your Ali manifold and bottles as structural strength.
Just thoughts ......
Put a new pic on the profile...
~Chad
Wow, looks beefy. Any ideas yet on what youd use on the near vertical front tubes to get under your opponent?
(It is worth making sure that the weight isnt lifted too far forward - but that gives me an idea that if you have some wheely bars extend from the base plate out the front with rollers that only engage with the floor when the flipper is taking a load that might help spread the load of a somewhat painful theoretical 4000+lbs!)
You pulled High Roller out of Robolympic 2007? :sad:
We were looking forward to seeing it fight Devastator, which is Marauder with a new name and owner (my brother).
I might change the frame design a little and get rid of the base plate. I am messing with the CAD now... The arm is not done yet, it will have forks on the end of it...
High Roller will be at Robolympics (if it is done) I had to take it off the event in order to change something with the robots profile. No worries! :-)
~Chad
I put a new pic up... And changed it up a little! Just gotta add the armor now.
~Chad
Can someone draw me a picture to explain the differance between an open and closed pneumatic system with respect to combat robots? This was someones point in an argument we have been having about rules. I was told Marauder is a closed system pneumatic robot and therefore must follow the rules and the other robot was an open system robot and therefore the rules didnt appy to it.
I thought the differance was in an open you had 2/2 or 3/2 valves and a closed system used 5/3 valves. Am I wrong? Id prefer to be told Im wrong by people who know what they are talking about, because itll make a change to what I have to put up with the last week.
In an open circuit atmospheric air is pressurized, used in the pneumatic circuit and then exhausted back out into the atmosphere. This is one way that pneumatic circuits differ from hydraulic circuits. Hydraulic circuits are closed circuits. The same fluid is continually re-circulated within the circuit
Ive never heard of a closed pneumatic system .
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