iPhone 14 Pro Max
Æ’/1.78
6.86 mm
1/327
80

Somehow Luna has the notion that rockets are too loud, but she still likes them. She also told me she chose this special Elsa rocket dress for the launch. We loaded her favorite Elsa figurine (in my hand) into the payload bay labeled “Luna Module” and took her on a suborbital flight. Despite a flight anomaly, when all four fins ripped off at the supersonic transition, the rocket came back softly by parachute, and all was recovered (minus one fin that I will replace). She went 0 to 800 MPH in one second!

One response to “Weekend 🚀 Fun with the Kids”

  1. Plume is ~ length of airframe! Strontium Nitrate in the AP propellant makes it glow red:When I advance the video frame by frame, the four fins pop off 1 second after launch (3 visible here, about equidistant from center):So, I ran a RockSim of the flight:Looking at these numbers, she pulled 49 g’s (so…Elsa faced 49x force of normal gravity! Fighter pilots max out at 9 g’s. She is one tough astronaut… solid plastic that one.)

    But she did not reach 3,554 ft. in altitude because of the shred and early parachute deployment (missing the 9.4 seconds of upward coasting that she was meant to have)

    She probably did get close to 872 MPH though… That’s Mach 1.1 !!! If we give a haircut, and say it only got to 90% of peak velocity before shredding, it’s Mach 1… and that rough transition is the likely cause of the shred. Also, looking at the thrust curve for the H182 engine, Max Q would have been 1.1 seconds in, and that is when the fins popped off, based on frame timing in the video.

    0 to 800 MPH in 1 second. Can’t beat that! Elsa = Better than Bezos’ bragging rights. They can both pretend to be astronauts now! 😉

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