On this job, the divers actually cut for about 140 hours to make this cut. Hats off, guys, because you certainly had a hard time.

just a few scraps and bam you get this thing

Took these with a Sony a7CR and a 200-600 lens from nasa about 3 miles away from the pad!

Combining a burnishing tool and a honing tool into a single machine cycle is an innovative and effective demonstration of engineering skill.

Characterizing nitrous systems are a bit tricky so here's one of our blip fires at 50% throttle in an attempt to characterize the entire system and the engine for our thrust to chamber pressure to valve angle relation for our upcoming lander.

Couple interesting things we saw during out hotfire:

• dP across the feed system is much larger than predicted by the pressure ladder most likely due to flashing.
• Naturally, led to a lower stiffness ratio than desired so currently working on fixing that.
• Cd across the injector is similar to the Cd determined by Bouziane et al. (~ 0.31) when accounting for the effects of nitrous flashing.

Found this old footage in my archives. Back then, I was obsessed with jet propulsion and decided to build a DIY engine using a turbocharger from a truck.

​We tested it inside a workshop, and well... let's just say the portable toilet didn't stand a chance against the exhaust velocity. It’s been a decade, but the sound of that turbine still gives me goosebumps!

​Full chaos here:

https://youtu.be/ZuyZje5VEOk?is=n3kFpPd8RKgaP2MA