Noobie here with a question. I'm just thinking ahead and want to learn more about this. Do fliers often not use a drogue when using a GPS? Would it make sense not to if the rocket is going to around 20,000 ft. or less?
I was wondering becuase rocksim says that a rocket going to 15,000 ft. W/O DD then falling at 22 fps in 14mph winds will land 1.7 mi from the launch site. That doesn't seem too bad, and if launching under more calm conditions, I don't see the need for DD.
but its not as accurate. Hes saying get RS PRO and see what it has to say.
TimNoobie here with a question. I'm just thinking ahead and want to learn more about this. Do fliers often not use a drogue when using a GPS? Would it make sense not to if the rocket is going to around 20,000 ft. or less?
The recommended descent rate under a main parachute is ~15 fps. A 10 mph wind will move your rocket sideways ~15 fps. If you reached 20 kft and popped a main under such conditions, you could have a 4 mile recovery trek, and that might be conservative since the upper level winds are usually stronger and may well come from a totally different direction than at ground level. Splitting the rocket or deploying a drogue at apogee and deploying a main at 300' will likely reduce the walk by a factor of 4.
To launch a rocket that gets to 20,000 you need to be L3 high power certified, and during the certification process you will need to learn all about this sort of stuff.
I was using RS Pro as an example that RS is just scratching the surface when you try to figure out landing zone guesstimates & you really need more data.
Also at 20k you might have trouble by "just popping the chute" by any means.
I think there are two main questions to ask when deciding to use dual deploy:
How far do you want to walk to retrieve a rocket? If 1.7 or more miles is an acceptable walk for you. That much of a walk for me and I would be like :hot:
How much range area do you have for retrieval? In the desert or farmland you probably have miles of space, but some places may have retrieval space limits.