If you're looking for videos, it's under the Media section of this forum. Both instructional and videos provided by the brothers got nested in there. Here's brother SIM's videos:
For air, you can see it anywhere. Just type up "MityVac video" and you'll get tons of shared videos.
Stupid questions tend to lead to unique answers that others tend to not ask, believing they are "stupid". But you never know what you can get as answers.
Circumference and diameters are correlated. Tons of cylinders provided measurements for both diameter and circumference. Most sleeves are only provided as diameter and not circumference. MoS Shop provides both info, including in metric and imperial.
You are correct. Most penises are not "round". Cross sections tend to be oblong. It varies from the base all the way to the glans. It's never "round". Close to round, yes. However, the cylinders are indeed "round". There's no way around that. That's why sleeves are provided in diameter as the sleeves are flexible to form to the penile's oblong shape.
As for the formula, you can only create a general volume displacement and not variable oblong shape. It's possible, but you'll be breaking out calculus and advanced mathematic formulas to account the differential shapes from the base to the tip of the glans. I don't think anyone want to go there.
That can be done, but at the same time, you have to add multiple factors for proper expansion and growth. Penis sleeves cannot accomodate this.
- Cylinders must account for air vs water setup.
- Cylinders must account for head space to optimize for water and side buffer space for expansion for girth and sufficient buffer pressure to prevent edemas for higher pressures.
- Cylinder must ensure pressure equalization from bottom to top for penile expansion on equal level to prevent penile misshaping under expanding pressure. That means the cylinder must remain equal from the bottom to the top or you'll get a baseball bat, pyramind, or reverse baseball bat shape from pumping.
- Cylinder must account for current penile size to prevent vacuum pressure sucking up base skin, which can cause bad discomforts. Imagine your penile base is 1.5in diameter. If you go up 2in, it's perfect as expansion of the skin will prevent other skin from being pulled in. If you jump straight to 2.5in, you have 0.5in of free space that will allow excessive skin being pulled up. Can you say, "OUCHYYY!!"
Your question is actually got asked quite a bit in the past. But the table form is a good idea.
@DLD Do you want to incorporate this into the pumping questions and answer focusing on MityVac?
