Parts to assemble a retracting tailwheel for the FW190 at 1/6th scale, model uses a long travel gear door actuator ie. HobbyKing - https://hobbyking.com/en_us/turnigy-servoless-actuator-for-gear-door-90-120-size.html
Please note: this is the STL files to allow you to print your own parts, you are NOT buying the finished parts.