Problem
Due to its rocket propulsion system, the Jetpack evo NT has very few moving parts. Nevertheless, there are some interfaces that rely on storage. Among other things, a solution had to be found for the exposed bearing points of the two control handles, which the pilot uses for lateral control and thrust distribution. The most important storage point is located at shoulder height centrally above the high pressure tanks. It literally has a supporting role in the overall system, as it is not only responsible for manageable control of the missile system, but is also the load carrier for the pilot, corset and fuel tanks. The most important requirements for the bearings: the lowest possible weight as well as heat and corrosion resistance. The fuel is extremely corrosive, and the water vapour produced for thrust contains free oxygen and is 800°C hot.
Solution
Plain, ball and spherical bearings from igus made of high-performance plastic meet the special requirements. The contact with the rocket fuel and the high temperatures do not bother them. They are also extremely lightweight. With identical dimensions and guaranteeing the necessary strength values, they can save around 80 % in weight compared to their metallic counterparts. In the hand control elements
xiros ball bearings with glass balls are used. The absorption of the entire load is undertaken by an
igubal rod end. Further bearing points on the Jetpack are equipped with
iglidur plain bearings.