You are right, there is no formula for this. But can't we construct one? I mean there's not that many variables. I tried to make one but I don't know enough about the relationship between the speed of ejected water and nozzle size.
If we make the formula it would be great. Because the contest...
After posting this, I realized water loss rate is connected to thrust and thrust is connected to mass(wich goes back to water-air ratio again), and speed of the water coming from the nozzle which is connected to the diameter of the nozzle(I think?).
Can there be a formula that we plug in the...
I think I can do few dozens of experiments and find the perfect ratio but I came to PF for math. I know there is a way to calculate the perfect ratio because we know all the variables involved like pressure, size and water loss rate etc. I just don't know how.
So, can someone show me how to...
I have gathered some materials like pop bottles and made a crude rocket that can go in a straight line.It weighs about 151 grams It's not that stable or aerodynamic but making it more stable and aerodynamic will not effect the mass of the rocket too much.
If it has too much water, it will be...
I'm going to make a water propelled pop bottle rocket for a competition. The bottle holds 1.5 liters and we are going to fill some amount of it with water and pressurize it to 75 psi. When triggered, water will come out of the hole in the cap and propel the rocket. The rocket is perfectly...
Hi there
I'm an 8th-grade student from Turkey. I came here to research about my projects. I'm glad that I found a high-quality forum like this to ask my questions about physics and math.