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I wonder how a person would know for sure if there was a jet plane in the way? Woops!
On the Saturn V model scale, the modelers are required to file a Notice to Airmen (NOTAM), which can - quite reasonably - be denied. If it isn't, it's really on the pilots in the area to read their NOTAMs and avoid the airspace. Of course, the modelers need to pick a launching spot so that they don't encroach on regulated or restricted airspace.
The crazy Danes in the video above had to contend with 1.6 ton of rocket returning to Earth, so they used a naval firing range in the Baltic, where there are well-established procedures for informing other craft to stay away. (One of their main reason to use a sea launch. Less - much less - red tape.)
About the only experience with a rocket (so called) was water-air propelled. It literally went out of sight. But I'm sure that doesn't compare to a 1/10 model of a Saturn rocket!
This time, they launched their Sapphire proof-of-concept rocket - with active guidance. And it worked...
Launched from a platform that was moving around on the ocean, reaching an apogee of 5 miles, yet its guidance worked so well, it never drifted horizontally more than 460 feet off from the perfect vertical.
That is actually pretty goddamn impressive. The Sapphire rocket is 17 feet tall, weighs roughly 450 pounds, is fueled by a hybrid N2O2/polyurethane motor, and it's all - engine, avionics etc. - built and designed from scratch.
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The Crazy Danes at it again...
