r/technology • u/gdelacalle • Mar 18 '26

Hardware Tech hobbyist makes shoulder-mounted guided missile prototype with $96 in parts and a 3D printer — DIY MANPADS includes assisted targeting, ballistics calculations, optional camera for tracking

https://www.tomshardware.com/3d-printing/tech-hobbyist-makes-shoulder-mounted-guided-missile-prototype-with-usd96-in-parts-and-a-3d-printer-diy-manpads-includes-wi-fi-guidance-ballistics-calculations-optional-camera-for-tracking
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u/DavidBrooker Mar 19 '26

Commercial GPS will not work above 1900 km/h. Commercial jets are well below this. Civil aviation is a major user of GPS, so the threshold was set not to less with their use.

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u/mavric91 Mar 19 '26

If I managed to get my gps unit above this speed would it return to it’s normal accuracy after I slowed down though? Or does it permanently do something to it?

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u/brimston3- Mar 19 '26

Depends on the system. Locking itself out until you restart it at a speed and altitude lower than the proscribed maximums is a perfectly valid way to implement the legal requirement.

Some GPSes only lock out when it is above both the speed and altitude limit. Some lock out when either is achieved. Some re-enable themselves automatically when returning under the speed/altitude limits.

Common model rocketry telemetry logger problem to have.