Hello!(adsbygoogle = window.adsbygoogle || []).push({});

I'm completely lost trying to derive an equation that'll give me the driving force in a DAC, and I really need some help from you guys.

The purpose of knowing this is to optimize the amount of air that is needed (24 litres are available, pressure up to 8 bar) to drive a radio-controlled car (60 kg), which needs 20 N to keep in linear motion.

The connecting rod from the cylinder goes to a scotch yoke, and I guess this is where I get a bit lost because of the force that varies through the angles from 0 to 2π. And I don't quite know when the ideal gas law comes in the picture (it should be used with 1 atm being the ideal pressure at the cylinder bottom, right?).

Data:

* Car wheel radius: 0,1 m

* Force needed to keep the car in motion: 20 N

* Gearing between wheel and engine: 1:6 (that is, one rev for the wheel is 6 for the engine)

* Efficiency is 10-20%

* 24 litres of air available and the pressure is to be choosen between 1-8 bar

* The volume of the cylinder is between 30-40 cm^3 (also to be decided)

My technical english isn't flawless so if something is unclear I'll try to do a better explanation.

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Calculating the driving force in a double-acting cylinder using air

Loading...

Similar Threads - Calculating driving force | Date |
---|---|

Motor specifications to drive Motorcyle Carousel | Nov 27, 2017 |

How to calculate the required specifications of a motor? | Feb 13, 2017 |

Calculating acceleration constant for linear actuator | Aug 3, 2015 |

Calculating driving force from wheel rpm, wheel radius and engine power | Oct 13, 2009 |

**Physics Forums - The Fusion of Science and Community**