got a couple of questions about featherweight systems:
- what stroke and bore ram is normally used for featherweights?
- are they normally single action or double acting?
(there will probably be more questions in future which i will stick in here)
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got a couple of questions about featherweight systems:
- what stroke and bore ram is normally used for featherweights?
- are they normally single action or double acting?
(there will probably be more questions in future which i will stick in here)
Also, whats the difference between hp and lp systems in cost wise to build, difficulty and effectiveness in the arena?
One other thing, if I were to use a 100mm stroke, 50mm bore double acting ram runnig at 16 bar, should that give me a good ram for a featherweight?
Thanks
Matt
Depends what style flipper your going for.
I'm going for a rear hinged, probably lp system. I just can decide on either single of double acting
anyone give me some help on this?
who or were are the best places/people to get stuff got a featherweight HP flipper system?
eBay!!!!!!
a HP system is usually a custom job. You need to speed to someone with the know how in building one. Kenny and Mario jump to mind
What are their users on here?
viewtopic.php?f=168&t=2231
just got in contact with them :)
I guess this wouldn't work?
eBay number 160577846893
not realy sorry
This seems more interesting
eBay, 230613741595
Dan, please post the entire link not just the ebay number
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 3D1&_rdc=1Quote:
Originally Posted by Danjr1
Is this the one Danjr1
jonny copy the number and paste it in the search if you are having problems
thats the one rob
I have one like that but not tested
So my understanding of CO2 HP systems is coming along well but there are a few things I would like to ask.
I know the rules state 1000psi but is CO2 able to be held at that pressure when it liquidises around 850psi?
Do featherweights normally regulate this down, if so are buffer tanks common? And also what size Buffer tanks.
I have seen quite a FW's use paintball tanks which seem okay on thei pressure rating but what would you say is a suitable size (Providing a standard ish ram of around 60mm bore and 100-150mm stroke length)?
I am guessing for a normal rear hinge flipper a single action ram with some kind of spring return is the normal, and that there isn't much that can be done with the temperature drop.
co2 varies on the temp on the day, on a hot day you might get 1000 psi before it liquidises, on a cold day you might get 700
Did some digging and most my questions are answered but these:
I have concluded a buffer tank is fairly sensible, but how large should it be?
Is regulating it down to 250-300psi sensible or too much?
And the most important, most people say you need adaptors to use CO2 paintball bottles, where are these available from?
http://www.teamonslaught.fsnet.co.uk/co2pv.gifQuote:
Originally Posted by jonny
Size of buffer is difficult to quantify ..I've run many spreadsheet scenarios and more volume is better BUT it's a law of diminishing returns.Quote:
Did some digging and most my questions are answered but these:
I have concluded a buffer tank is fairly sensible, but how large should it be?
Is regulating it down to 250-300psi sensible or too much?
And the most important, most people say you need adaptors to use CO2 paintball bottles, where are these available from?
So ..Ummm... You must IMO have one and size... Errr...as big as is practical in your design is the best I can advise.
Your suggested pressure seems fine...perhaps a little higher.
Ram size.
All FP
Hannibalito I 32mm bore *80mm stroke
Hannibalito II 60mm bore *85mm stroke
Hannibalito III 50mm bore *75mm stroke
HP of LP.
1 of the main problems with CO2 is the fact all normal regulators don't like liquid. So, for the KISS principle, LP is a problem. The Trevor regulator (custom RW regulator, about the lightest , dependable regulator I know) doesn't suffer from liquid CO2, but doesn't regulate it either.
On the other hand, FP is a custom job, or a very expensive/heavy one. As 1000 psi pneumatics ain't off the shelf.
Buffertank size. I aim for 3times the volume of the ram. But in Hannibalito II and III I just used a customized 12oz paintball bottle. Hannibalito I uses a 2 oz steel buffer.
The 3 Hannibalito's also use a standard paintball bottle with an on/off valve, not the ones normaly seen in our events, the 20 oz bottles with a normal valve. We solve that by lugging our own filling hose, something you can buy at any serious paintball shop.
We have also a backup filling nipple, nothing more than a CO2 nut to a paintball bottle connector.
I hope that answers a few of your questions.
How much roughly would a low powered system weigh? 2.5kg?
a co2 bottle alone is either 1.6 kg and a 300g one weights 1.1 befor you startQuote:
Originally Posted by Danjr1
i would say about 8oog
wow 800kg now we know why u win all the time using a system that is way over weight lol :P
lol 8kg LOL sorry
ps not won any thing this year!!!
not surprised when your losing 792kg from your flipper system, bound to affect performance :D
Will have to look for a lighter weapon then! I'm already at 9kg for the bit alone!
With FP , a low powered system still delivers a few 100kg
Surface of piston in cm²*pressure of CO2- 55bar= force in Kg.
Meaning a 40mm piston delivers 690 kg. - relative losses , give or take 600kg .
The 12oz bottle we use in Hannibalito III weights in at a hefty 1.1kg full.
A Burkert 5404 (reasonably affordable solenoid valve that can do the job) weights 660 grams.
Ram (40mm bore*80mm stroke), collector and buffertank, with PRV and dumpvalve, can be done in 2 kg
4.5 kg to 5 kg is a reasonable weight for a full weaponsystem.
Are linear actuators worth the investment for a rear hinged lifter? I cant imagine they are very fast?
I used a home made linear actuator and it was quite slow, but it worked
if you found one with a good amount of stroke and force then it could work :)
easier and cheaper to make your own.
you would have to get a good drill though to get enough speed to make a good one though :)
Would make a cr@p srimech though wouldn't it?
It would probably be fairly effective, just wouldn't have the same power as a gas system
you'd be able to lift people and turn them other but you'd nether have the speed flip them with an actuator
Weighed the robot and it's coming in at 8kg so a flipper looks possible now!