If you want ordinary “card” loop was samarastroydetal like spring-loaded, easy to upgrade. For this of eyes loop is extracted axial rod, and the reverse installation is put one or two springs so that their ends rested on the loop. Eyes for necessary for this file.
Recommend to read
NOT WITH WAX, AND CLAY
For better preservation of volatile liquid vials are usually recommended to clog with wax. However, it is not convenient, if the bubble has to be open often. It is better to use clay:...
“PERSISTENT” ASKS IN THE FLIGHT
So call your plane the club-model airplanes and their leader — Vadim B. Rumyantsev from the city of Privolzhsk, Ivanovo region, whose hands at the local station of young technicians...