I'm attempting to build an Air Data Computer which obviously requires pressure sensors (one for static and one for pitot). I've done some maths and I know I want them to be operable between around 0.7 to 4 bar (about 10-60 PSI) as this is roughly the pressure at 10000ft and the max pressure at sea level based on the max speed of the aircraft I will use.
I can't seem to find any suitable sensors, or ones that are easily compatable with the Female-Male wires (Male for connecting to my Uno board). Does anyone know any that are good, or would work for my project or has someone done a similar project before.
Most pressure sensors that include connectors have several options available, including bare wires.
If bare wires are not an option, either buy a matching connector and make your own adapter cable, or cut off the existing connector and replace it with anything you like.
On an aircraft subject to vibrations and other forces, you MUST use secure connectors or soldered leads. An Arduino board with female headers is not on that list.
Yeah, I'm aware, luckily my aircraft has no engine so there are far fewer vibrations. I'm just looking to make something rudimentary more as a proof of concept
I had used 120knots = approx 61.7 m/s
Projectile is the incorrect word
I fly gliders (albeit there may be vibrations upon launch and if this is the case I'll solder everything together).
I was using something similar to this for my calculations:
4 bar?? That's the stagnation pressure at Mach 2. What on earth are you building??
Ah, I see, you didn't use the correct units for you calculation.
stagnation pressure = 0.5 x density x velocity^2
All in SI units. Always work throughout in SI units!!!
You got the 61 right as metres/second.
No idea what value you used for rho, but 1.2kg/m^3 is the one to use.
However the SI unit of pressure is the pascal, Pa, not bar or millibar. 1 bar = 100,000Pa. Thus your calculation should give 2233Pa, or about 22mbar
