I am working on a rocket that will utilize a pressure-fed liquid propellant (LOX/Ethanol) motor to propel it. Total weight will be in the 400-600lb range, height >20ft. We're thinking it will go around 5 miles up.
My question is how would you suggest we perform the recovery? I assume dual deployment is the way to go, though I'm unsure about the sizes of the parachutes needed. Based on a 15fps descent rate, it looks like we'd need a main greater than 50 feet in diameter! Also, is it fine to just scale up the DD system you might use in a smaller rocket?
I haven't been able to find any examples of "hobby/model" rockets of this size but if anyone knows of any, with details on its recovery system, I would be very interested.
Any input would be appreciated.