john bunsenburner wrote:@rag: I, as a young teenager, want to find my limits and boundarys, I try to be safe.
You've been told that 50 bar is not safe for a starting project. Even 20 bar is pushing it for a starting project.
You are looking past your limits and boundaries. You do not find limits and boundaries by starting high, you find them by starting low and working up.
If you wanted to find how far you can fall without injury, what you are doing is analogous to jumping off the Eiffel tower.
What you should be doing is jumping off a wall a couple of feet high, then another a bit taller, until you reach your limit working up - not working down.
To move away from the analogy, you get told these pressure are not safe for a beginner, then tell us "Okay, I'll do something else", and the next thing we know there's another topic or post that's asking how to do the same thing you've just said you won't do.
Quite frankly, it sounds like you're making no attempt to listen.
I don't see why when we're making every effort to get you to build up experience with a less dangerous project first, you're completely ignoring us.
The science you're using is frequently mistaken, misguided, or just plain wrong, so it's clear you're not in the position to make a well informed judgement on using pressures even I with my building experience, engineering knowledge and a mind outright built for mechanics, would be VERY wary of using.
I present these errors in your post as a point that you're really really
not ready for such a project, based on the huge numbers of mistakes you're making.
If i am correct then if the fulcrum of the lever is 5cm away from my pump^s piston rod and the lever is 140cm long that would make me have to one thirty second of the work
It would be 1/29th of the force
, not the work. Work is exactly the same in either case, because you then have to pump 29 times further.
A lever does no more for reducing the work than does reducing the pump bore diameter. You have to then make longer strokes in order to pump the same volume.
Another thing to consider. The fulcrum has to be fixed - how are you going to get a 60cm long pump stroke with a 5cm fulcrum? Absolute theoretical maximum stroke is 10 cm with a 5cm leverage distance, and you won't even get that.
Also, in order to make that 10 cm stroke, you then have to pump the end of the lever through 2.9m. Unless you're very tall, you've got another problem.
As it is, as you will not take the advice given, the only way we can protect you from harm is by preventing you from getting the disjointed snippets of knowledge you're asking for, because they will be HIGHLY dangerous to you. You're not demonstrating any of the skills, experience or other required background in science that you will have to have to use said information safely, so it's rather like us handing a live hand grenade to a three year old, and the results will probably be roughly the same.
As they say, a little knowledge is a dangerous thing. The problem is that you have woefully little knowledge in subjects that are of critical importance to your safety, which means that you are just going to be a severe danger to yourself if you attempt any of these projects.
I don't want to have to take such drastic steps as talking to the moderators and admins so as to have your access to this site restricted so as to prevent you from acquiring information that you do not know how to use safely, but if you keep up your repeated ignorance of what you are being told, I will feel it my duty to do so to protect you from a very likely injury or even potentially, a fatality.
I may sound like the most extreme killjoy ever, but I assure you, I will not be doing it (should I have to) with the intent to rob you of your dreams, fun or aspirations - just out of the utmost concern for your safety.
In the mean time, I implore other users on this site to exhibit extreme caution in the information they give you, especially that relating to these high pressure projects.