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Rockets

Air MK1

 
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CAD Model of Air

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Air MK1 - Fully Built

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2D model of Air taken from OpenRocket

Air MK1 is a high-powered rocket, designed to fly to an altitude of over 1km at a max velocity of over 600kmph. Air MK1 uses a 74mm cardboard mailing tube as its airframe, and motor tube, with a 3D Printed PLA nosecone on top. The fins, centering rings, and motor retainer are precision cut out from 3mm thick Plywood. The payload for Air MK1 is the TFAC flight computer designed by me, TFAC flies onboard the rocket to record data and test out its software. TFAC is configured to fire Pyro Channel 1 at apogee but isn't connected to any black-powder charge. This is mainly to check if the computer has a good understanding of where the apogee is, and to see whether it cycles through the state machine properly. TFAC is powered on by twisting two wires that are connected to the computer's switch terminal. Additionally, the vehicle has a RunCam Split 3 to capture onboard video. Air MK1 is recovered using a 48" nylon parachute deployed by the ejection charge from the motor.

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Avionics Stack for Air

Along with TFAC is a LoRa telemetry radio to transmit data from the rocket to a ground station. The ground hardware is comprised of an identical LoRa radio and a Teensy 4.0. The Ground Control Software (GCS) is a GUI written by me. The ground software was written in Python with the PyQt5 library. The ground software displays flight data such as altitude, velocity, acceleration, and GPS coordinates. The data transmission rate is variable and lowers as the vehicle ascends. Along with the ability to display data the GCS can also send commands to power on vehicle cameras, fire pyro-channels and switch system states. The code for the Ground Software

can be found here.

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Ground Control Software

Air MK2 CAD Model

Air MK2

 

Air MK2 is my newest High Power Rocket and my first dual-deploy high-power rocket. Air MK2's main goal is to have TFAC deploy parachutes and go high and fast. Air MK2 is built out of similar materials as its predecessor. It uses an identical 3" diameter cardboard tube as its airframe and a 2" diameter cardboard tube as its motor mount tube. Air MK2's fins are through-the-wall fins laser cut from 4mm thick plywood. The centering rings and other bulkheads are cut from 5mm thick plywood. The nosecone of Air MK2 is 3D printed and the coupler tube will serve as the Avionics Bay. The sled and bulkheads of the avionics bay are 3D printed, and there are plywood covers on top of the bulkheads to protect them from the ejection charge. There are also two 6mm diameter threaded rods running through the av-bay to provide structural rigidity and an eyebolt on each bulkhead for shock-cord attachment. The avionics bay is powered on by a 3s 800mAh LiPo battery and there is a pull-pin switch to power on the flight computer.

Air MK2 is 1.5m tall and has a dry mass of 1800g. It is estimated to reach an apogee of 1800m at a max velocity of Mach 0.7 on a J135W equivalent rocket motor.

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Air MK2 OpenRocket 2D Model

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