user-1: I am not very experienced with Arduino and I am trying to learn it. I was wondering what is the easiest and most effective way to calculate speed and log it every second so to say. This would be mounted in a model rocket to see what speeds it can reach. How would I achieve this?
Would it be hard to send over RF to see it in real time?
Thanks in Advance

user40578: You can use an accelerometer or a barometre for measure speed and for RF you can use:

Radio NRF24L01
wifi ESP8266
bluetooth HC-06


-1: <p>I am not very experienced with Arduino and I am trying to learn it. I was wondering what is the easiest and most effective way to calculate speed and log it every second so to say. This would be mounted in a model rocket to see what speeds it can reach. How would I achieve this?</p>

<p>Would it be hard to send over RF to see it in real time?</p>

<p>Thanks in Advance</p>
 40578: <p>You can use an <a href="https://diyhacking.com/arduino-mpu-6050-imu-sensor-tutorial/" rel="nofollow noreferrer">accelerometer</a> or a <a href="http://arduinolearning.com/code/bmp180-barometric-pressure-sensor-example.php" rel="nofollow noreferrer">barometre</a> for measure speed and for RF you can use:</p>

<ul>
<li><a href="http://howtomechatronics.com/tutorials/arduino/arduino-wireless-communication-nrf24l01-tutorial/" rel="nofollow noreferrer">Radio NRF24L01</a></li>
<li><a href="http://www.instructables.com/id/Quick-Start-to-Nodemcu-ESP8266-on-Arduino-IDE/" rel="nofollow noreferrer">wifi ESP8266</a></li>
<li><a href="https://create.arduino.cc/projecthub/user206876468/arduino-bluetooth-basic-tutorial-d8b737" rel="nofollow noreferrer">bluetooth HC-06</a></li>
</ul>
