Big thanks to swagsmurf87 for finding out what was wrong with it!
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You will need to manage the engines a bit if you're going to land. The props overspeed when throttled down, just throttle up very slightly every few seconds until they calm down. VTOL down to close the cargo bay doors.
PAK TA is a new next-generation Russian military transport aircraft project. It is claimed to be able to fly at supersonic speed and carry up to 200 tons of cargo load as tanks and troops. This capacity means that a fully equipped task force can be delivered to any place in the world within hours. Russia plans to build 80 PAK TA planes by 2024.