It does fetch it from the internet via the DarkSky API, based on location data from your phone/tablet with which you're controlling the FS Mini.I ordered 2 as it is so inexpensive. Amazing device.
How does the flightsketch mini know so much?
For example windspeed? Or does the software fetch that from the internet?
Having recently lost a rocket in the woods, I'd buy a piezo buzzer the size of the flightsketch mini but have it buzz only after ejection (or liftoff). I know it's potentially spending more $$ to save an inexpensive rocket, but what bothers me is not knowing exactly where it went.We've got a lot of updates in work now, please feel free to send any suggestions. We will be branching out a bit with the service too.
It is really hard, but not impossible, to seal a paper and balsa model so tightly that an altimeter clearly doesn't work. But it is easier to seal it well enough that the altimeter never "sees" the true apogee as the pressure inside the compartment lags the pressure outside by a few seconds. Here is a graph I've put together illustrating that. It has appeared in Sport Rocketry (Jan/Feb 2019 issue in an article by Dan Wolf) and in the report for an R&D project I did for NARAM-61. These are data from one flight that was carrying an Adrel ALT-BMP and an Altus Metrum MicroPeak in each of two small compartments, stacked on top of the same model. These are the Adrel data because it's easy to overlay two datasets with the Adrel application.I noticed that putting breathing holes in rockets isn't necessary for Flightsketch to work properly. It's rather amazing.
I loaded it into a paper sealed payload (not perfectly sealed as it's paper) but definitely one without holes. And it worked perfectly. So glad I did not poke holes.
Why do I know it was accurate?
Visually it looked like that distance.
I later put in the weight, motor etc in https://www.thrustcurve.org and the simulation was close.
There is an onboard barometer but also accelerometer. Does the accelerometer bolster the barometer?
That's easy. I am thinking of cutting a small BT lengthwise and creating a mount that the FS would fit under that I can easily move from one rocket to another. Drill one 1/16" hole in said BT and it's vented. I'd rather have it on the outside cause I am weird like that...plus it keeps it out of the ejection gasses on single deploy rockets with no payload bay. I would probably only do this with G motor rockets and larger the the aerodynamic effect would be rather negligible.I’m not sure how you would vent it. Instead of a lump on the outside consider a larger nose cone like a payload bay.