Hello. I am working on planning to build a small pnumatic tricycle. I got far in my calculations, but not quite finished because I am stuck. If someone could check my math, that'd be great, but my problem starts at the second line. ______________________________________________ 1. Lets say that my air tank is 1064.54 in^3 2. According to http://www.frightprops.com/faq/images/cylinderdims/1250DVS.jpg, it looks like the volume of the cylinder is 3.6 in^3 3. Lets say im riding bike wheels (3 bike wheels) on concrete. My friction would be (0.002*791.78N*3=~4.57N) 4. In the description, they say it has a push factor of 0.44. So 100psi in tank means 44lbs of push force. I made a table of that and found a bunch of values for y (100psi in tank means 44 lbs of push in the piston, 99psi in the tank means 43.56 lbs of push in the piston, etc...) 5. I converted all the y values (the values that describe the piston push) into newtons. 6. Then i subtracted the 4.75N of friction from the 195.7N (from the 100psi of air feeding the cylender and making it push 44lbs) and got the net force of ~196N if the tank was constantly at 100psi (195.7 is also the first on the list in the y table) 7. Then i divided the net newtons (191.25) by the mass of the vehicle (80.7kg) and got 2.3366m/s^2. 8. I also did this with another value on my table (180.1) so it is 2.17m/s^2 9. The wheel is pi feet in circumfrence. ____________________________________ I need to know my vehicle's speed, which is a problem if I dont know how much time it will take. From my understanding: Vf = Vi + at I averaged to 2 accelerations together and got 2.2533m/s/s I need to know how fast this thing is going to go and how far. I also need to know the formulas needed to get to the end of this problem. Thank you. I do not know what level of a question this is.