The physics of force transmission in air versus water pumping

Yes, it makes sense, you are creating the space for your penis to expand, that way. But the ‘not expandibility’ of water is still pressing your penis, fighting the expansion.

The compressibility/expandibility of air is an advantage, not a problem; it is true that air will expand easier, but when it is expanded beyond the normal state, it will be more easier compressed by your penis, which is forced to expand by the depressure force.

We said : there is less fluid build up in water, because water compress the penis and fluids can’t be drained out; ok, but as water is compressing fluids, is also compressing other tissues. You can’t have both advantages - water compressing what you don’t like and expanding what you like. :)

There is also the refraction effect: if the tube is immerged in water, it will look bigger from the outside, but that is an illusion.

Is this from experience or theory?

Once the water leaves the cylinder, it “locks in” the expansion, for that session. Your penis cannot retreat from that expanded state while in the cylinder. The amount of water in the overflow cup is equal to the expansion of your penis. The water “pressing” the surface of your penis is what allows you to hold higher vacuum levels with less surface edema and capillary rupture.

So it both effectively expands your penis AND help support the surface tissue integrity.

With water pumping, as the penis expands, it drops the vacuum, you re-pump up to your vacuum level and create additional expansion. Like its been said, you can look at the amount of water in the over flow cup, and that is how much expansion you achieved during your session.

Half water half air is virtually air pumping and negates the benefits of water pumping.

Another analogy is hanging with two mediums of transmission. One is an elastic cord, the other is a rod attached to your hanger. The elastic cord will transmit the force of the wt, but it has “bounce” to it. If you attach a metal rod to your hanger, and then attach the rod to a wall, you can pull to an exact force (using a meter). The rod will not allow your penis to shorten past the length the force pulls it out to. It also prevents it from lengthening past the length of the rod. HOWEVER when the meter indicates a drop of force, as the penis lengthens…AN YOU FURTHER SHORTEN THE ROD, this is the equivalent of what water pumping without air is doing.

It expands the penis very effectively, and protects the surface more than air. IF you keep your vacuum levels constant, it will continue to allow for maximum expansion during your session. I use an electric pump set at 5 in hg, and its a very effective combination….electric pumping with water. It INSTANTLY re-adjusts vacuum levels to compensate for penile expansion.

The topic of this thread is theoric. ‘Experience’ here is what can lead to mistakes, actually.

It is also pressing everyyhing else, beside capillaries. The area that can reach a more expanded state is the area where there is no water. This area is exposed to all the risks that you have while pumping with air, because those risks are a consuequence of expansion.

At least if there isn’t another effect that I don’t know, other than pressure, when pumping with water. You can mantain a better warming, maybe.

Short of knowing, experience is all we have. I submit, none of us really know, unless we can get a Fluid Mechanics expert into the discussion. Almost the entirety of PE is based on experience. Its gotten us this far.

Sparkyx, what you are saying is that this thread doesn’t makes sense. The topic here isn’t ‘who has reporterd better gains, water pumpers or air pumpers?’. If so, you were right. But this is not the case.

Anyway, it could be interesting to see how ‘experience’ accords with we said here. Maybe a poll would be well worth? My personal guess is that water pumpers report less gains than air pumpers, all other things being equal.

Why wouldn’t the penis continue to expand into the 5 in hg as much as the tunica will allow? It will continue to exert 5 in hg of “pull” if you keep it at that level. Your theory would suggests that no expansion would occur or stops at some level. Yet “experience” shows that the over flow cup will continue to fill during the time, slowing once tunica has reached its max expansion.

How much water pumping have you done?

The topic is the physics of water vs air. I am saying in my experience water is a more effective mode of force transmission. In mechanics, fluids usually are used over air to transmit force, because of it being vastly superior, as in braking systems or hydraulics.

I am not claiming that air cannot transmit force, of course it can. Therefore, it follows that guys have had success with air, of course. My point has always been, if you aren’t getting gains with air, give water a try before you give up on pumping.

I’m fairly sure there are far fewer water pumpers than air pumpers, mostly due to not many guys know about it or tried it. As I have said, short of knowing, all we as PEers have is experience. My suggestion is to give it a try. I try and give some guidelines based on my experience on how to do it as effectively as possible. I will not change my suggestions based on someone else’s concept of what does and doesn’t work, because my suggestions are based on my experience. Of course, everyone is free to believe or do what they want, I’m just trying to give people the benefit of what I have personally experienced.

Sparkyx, the point here is simple : as far as your penis is immerged in water, it will fight more resistance against expansion. 5 hg are pulling on your penis, but water is pushing against your penis. If there is nothing, the penis can expand; if there is air, there isn’t much force figthing expansion; if there is water, there is more force fighting expansion.

‘Force transmission’. What are you meaning with that? If you had to compress your penis, you were right. If you have to expand your penis, my understanding is what I’ve said.

As a side note, not all pumps have a overflow cup; many are pumping with water using a normal air pump.

If there is a overflow cup, water is drained temporarily and penis can expand; but this exactly accords with what I said: the penis expands where there isn’t water. Water can create a better vacuum, as I said earlier in this very same thread. But the level of vacuum, is this really a problem?

The water cannot push against your penis if there is a neg vacuum occurring. It can prevent your penis from expanding PAST the expansion caused by the vacuum level. Very much like a metal rod used for hanging. It will transmit the force of the wt, and prevent the penis from lengthening beyond that level. This however is not a negative, rather a plus because this will decrease surface tissue damage compared to the same vacuum level with air.

Further, water will continue to exert the (for example) 5 in hg, as long as you keep it at that level. Air, taken to 5 in hg vacuum level, will not exert more than that either.

Water will push against your penis, because the pulling force of vacuum has little effect on water. You are creating a more denser environment, where your penis can’t expand. It is the constriction of water that pushes behind internal fluids.

Right. 5 hg are 5 hg, in water or in air. It is like sayin ‘5 kg’. The problem is not the pulling force, but what is fighting this force. The denser the matter, the lesser the expansion. If your penis is not completely covered with water, it can expand. That’s why I said water pumping can be more effective for length if the glans is not imerged in water.

Air, it is a little problem. Exactly because it is so easily compressible.

Force transmission is using a device like a pump to generate a vacuum, air or water is the medium to transmit this force to your penis, hence “force transmission.”

For water pumping, as in all pumping you need to keep your vacuum level constant or at least not let it drop below your chosen level. This means you have to draw off water as the penis expands. This cannot be done without an over flow cup or the water gets into your pump. So, if you wish to use your gauge, you need a overflow cup, period.

Ok, I give brother…have it your way.