There are a number of unmanned vehicles that flew at supersonic speeds during this period, but they generally do not meet the definition. In 1933, Soviet designers working on ramjet concepts fired phosphorus-powered engines out of artillery guns to get them to operational speeds. It is possible that this produced supersonic performance as high as Mach 2,  but this was not due solely to the engine itself. In contrast, the German V-2 ballistic missile routinely broke the sound barrier in flight, for the first time on 3 October 1942. By September 1944, V-2s routinely achieved Mach 4 (1,200 m/s, or 3044 mph) during terminal descent.
We want to thank everyone who visited Ingate at the Real-Time Web Solutions Conference & Expo, August 2016, in New York City.
We recently stated that Primo selected Ingate's WebRTC Solutions for their Mobile Phone App Primo Connect. Watch a video interview from the event, where Steve Johnson at Ingate and Jonathan Lin at Primo, talks about their collaboration, and this new way of communication, in which Primo uses Ingate as the driving engine.
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