parachute characterization

Hello everyone, hope everyone's doing good! So today finally came the day to start thinking and designing the parachute for my rocket. First of all some details, It is a 140cm high rocket roughly weighing 2kg, We are expecting it to reach an apogee of 800m and a velocity of 0.5 mach. So here are...

I am developing parachutes to recover two mid-power rockets with predicted descent masses of about 140 grams (~5 oz) and 280 grams (~10 oz). On larger rockets I usually make toroidal chutes and use dual-deploy. On these rockets I am going to pop the main at apogee and use flat parachutes...