You know you have to try the largest motor that will fit, eventually. I want to hear about the sims for the 3147L935 in the 6GXL case.
My sims for my L2 cert rocket said about 10,500 ft, but ended up only 9559 ft at M1.2. I'm still waiting for the right day to top 10K at an east coast field. That motor might be too much for a cert flight, but you have to fly your field too. I did my L2 with a K695R to just over 6400 ft. which was a good altitude and flight for our field on that day. I did see a L2 cert over 11K ft at our field and I think that was pushing it, but he had a GPS tracker that worked great and he got lucky on where it landed and it was recovered.
I think you will be surprised how solid the cardboard rockets really are. You have to use your experience with L1 at your field to determine how high and hard you want to push your L2. Go with what feels right for you, you know the field.
My sims for my L2 cert rocket said about 10,500 ft, but ended up only 9559 ft at M1.2. I'm still waiting for the right day to top 10K at an east coast field. That motor might be too much for a cert flight, but you have to fly your field too. I did my L2 with a K695R to just over 6400 ft. which was a good altitude and flight for our field on that day. I did see a L2 cert over 11K ft at our field and I think that was pushing it, but he had a GPS tracker that worked great and he got lucky on where it landed and it was recovered.
I think you will be surprised how solid the cardboard rockets really are. You have to use your experience with L1 at your field to determine how high and hard you want to push your L2. Go with what feels right for you, you know the field.