Precision manufactured, bilobed propeller for ship models of hydro, mono.
Wrapping screw-analogue of plastic propeller, from Graupner.
Propellers pro milled from a single piece of Duralumin, on a program milling machine. Precision and sameness of blades-maximum possible.
These propellers, are ideally suited to all mono class models, HYDRO/MONO.
This is test of this propeller 36 mm diameter, on H1 class
Rotation: Right, Left
Props diameter (select in Split option)
Ratio of props, (step to diameter): 1.4 (diameter digit, multiply by 1.4-get step in mm.)
Internal thread in propeller hub: M 4 or Drive Dog (DD) 4.75 mm (3/16 ")
Diameter of propeller hub: 6.5 mm.
Weight: 2.5-4 grams.
Propellers isis practical do not need additional balancing.
The obvious advantages of screws of such performance: their hardness and durability with respect to plastic screws;
Their accuracy of manufacture and sameness of geometrical parameters of both blades, at screws of the same type size;
The debugging and additional balancing of propellers (if required), are made with minimal effort.