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40*80 on low pressue is rather feeble with the current norm. Delivers 125 kg of lift.
Low pressure is getting uncommon, as it adds complexity for less power in return. The only advantages it delivers is that you can work with industrial standard parts. Easy acces to double acting rams and 5/2, 5/3 and 3/2 valves
Industrial parts have the added disadvantage of weight. Even after a serious round of customisation, an industrial low pressure ram will be heavier than a custom build FP single acting ram.
For example.
Hannibalito 1, what was low on the featherweight flipper power had a 32x75mm ram, and that delivered on full pressure, 440 kg.
Your "avarage" feather flipper uses a 50mm bore ram. 60mm bore isn't uncommon, and the biggest are 80mm+
Giving respectively 1000kg of lift, 1500 kg and 2500 kg.
In short, some of the current feather flippers have more lifting power than series 5 heavies with decent flippers.
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