I don't get that "feather" mode though
The entire tail assembly--horizontal and dual vertical stabilizers--rotates up and forward into a very high-drag position, then relaxes into its normal position when the aircraft had "re-entered" and is at a safe airspeed. This negates the need for high-temp skins to survive atmospheric friction, since the aircraft never reaches high airspeeds.
The tail "feathering" has been a standard feature of free-flight model airplanes for decades, usually set off by a fused hold-down that burns through after a certain amount of time, to prevent the model from flying beyond a recoverable distance.