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Giant Robo
Experienced Roboteer
Joined: 17 Jun 2004
Posts: 583
Location: Marayong NSW
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For El bravo I use two 1.25 litre PET bottles. They were fine at 100psi but to go higher with confidence I covered them in fiberglass and also the caps were filled with epoxy before being screwed on so they don`t leak and won`t blow off. I plan to give them another layer of glass; three all up and within the safety of the arena, pump them up to 200psi and then have another bot bash them around a bit. Then, if there`s no big bang! I`ll feel safe to put them up to 150 psi regularly.
The rams are the larger size, easily available black bike pumps I found in K Mart. The shafts have a dowel pushed inside them for extra strength, after you cut off the handle. At the base I made an aluminium box section about three inches long and extending one inch past the end, forget the old rubber hose and drill and insert an 8mm OD air hose, use a little plastecence to block any leakage points ( the four corners of the box section then fill that up with more epoxy to make a solid mounting base. Drill a hole through the base for a pivot pin and absolutely! use some strong cord on the flipper to stop the rams from exceding their full stroke and blowing out the ends.
With any rams like that, treat them with the respect you would a gun, NEVER put yourself in front of a loaded barrel!
Philip has the most powerfull featherweight flipper I have ever seen but the CO2, very high pressure, "proper" parts etc. scare me just a little too much!
He has taken a year or more also to develope it. He knows exactly how to do it safely.
Cheers,
Jeff.
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Sat Oct 01, 2005 1:28 am |
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