Seriously some of you guys are acting like complete jerks. Calm down and maybe we can get something more productive out of this other than making me quit this hobby because the people act like assholes. If you would like a little context for the dilemma my class group started out designing a rocket for the FAR 1030 competition with the intended goal of 30k. We submitted our proposal, got it accepted, budgeted out the whole damn thing and made the material order. A few days later, the professor "informs" us that we are required to go for 10k instead which incited a bit of a panic as we literally already blew the entire budget and can't just spit out an additional $120 for 5.5" blue tube or whatever would make it go closer to target. At that point I started to look for ways to bleed kinetic energy quickly post burn and mathematically, boosting the skin friction can work, providing it doesn't just melt off (a potential concern because all that energy has to go somewhere). Anyway, we had another chat with the professor and we managed to change the order for the injector components so we can build the L369 instead which makes this much easier. We can also manipulate the impulse a bit when we design and make the nozzle as well. Crisis averted.
Now seriously though if anyone has actually tried using skin friction to stay inside of a waiver or whatever please tell about it. I'm genuinely interested in hearing how that went. Concerning the air brake method, I had thought about that one but didn't have space or budget left to implement it so it got tossed out pretty quickly.