This final version of the retract landing gear is for models F2C. The results of the tests showed that the model equipped with the retract landing gear has flown 10 circles 0,4 seconds faster. Two independent dynamic modules provide the simplicity of the assembling and mounting for the models of any type. The possibility for easy turning-call of the spring gives the opportunity to set up the retract of the landing gear for the models of any weigh and any speed. This landing gear is used for the models of Yurii Bondarenko. You can order this article by contacting Peter Gumenny on email address р.gumenny@gmail.com