The distance bolts are designed so that you can bridge all dimensions of the head frame to the rear edge of the motor flange stepless from 20 to 55mm. This is achieved by the fact that the bolts are equipped with a continuous thread of M16x1. The thread is designed at intervals by an undercut of 1.5mm so that at the undercut each modeler can simply saw with a hacksaw the part to the desired length. It should be noted that the thread approaches are not damaged. Also, the piece of waste should be clamped during sawing in the vise, so that the thread of the useful part is not damaged. It should be noted that the thread must be screwed into the flange part at least until the next puncture in order to achieve high strength. Furthermore, the end face of the bolt is turned out with a spherical plane surface. A small disc with a spherical surface is inserted into this, so that the wedge-shaped openings created are steplessly bridged on all sides by up to approximately 4 ° in the case of infinitely variable adjustments of the lateral pull and the engine tumble. The holes in the parts are designed for M5 screws. But it is easily possible to drill the parts for M6 screws. It is important that the screws in the motor flange are not braced at larger adjustment angles. Otherwise the engine can be damaged. It may then be necessary to rework the holes in the motor flange.

With this system, it is possible to easily adjust the distance from bonnet to spinner back infinitely. Also, the setting of engine traction on the airfield is easily possible. Simply remove engine hood, loosen engine mounting, adjust bolts to desired dimensions, screw down, assemble, fly on. The flange with internal thread has a diameter of 22mm. The support plate has a diameter of 16mm at the motor flange After completing the adjustment work, a few drops of screw lock should be applied at the transition between the flange and the threaded bolt. As a result, the bolts can not rotate together, but unscrewing is still possible.

With this engine mounting system, every modeler is able to customize the internal combustion engines of 30-200 cc to their model without having access to metalworking machines.