VARIO Benzin - Rotory Modeler

It is very important toget a fuel can and ahand crank fuel pumpthat are designed forgasoline, and not forglow fuel.Essential items for flying gasolinehelicopters: a red, one gallon carrierdesigned for gasoline and Coleman kerosene,Castor 927 2-cycle oil from Maxima RacingLubricant, and a special mixer bottle alsofrom Maxima.German helicopters use such a design. for example, theelectric Mikado Logo, Heim, Graupner, and some Robbemodels. The hollow plastic Hiller paddles only weigh 16grams each and provide quick cyclic control, but withreduced stability. I strongly recommend installing someflybar weights or use heavier paddles. This model has a5 mm diameter flybar, while all 60/90-size helicoptersutilize a 4 mm flybar. Hence, it is necessary to drill outthe standard 4 mm i.d. flybar weight and paddles to fitonto this model. A set of 50-gram Miniature Aircraftpaddles were later drilled out and fitted onto theBenzin Acrobatic and that made the model super stableand a joy to pilot; plus the large control surfacesprovided ample cyclic authority for aerobatics.The main rotor blades flap easily on the Benzin rotorhead. For vigorous aerobatic flying, one can add extrashim washers on the spindle to compress the rubber.Many 90-size helicopters use only a 10 mm diametermain rotor shaft, but the Benzin Aerobatic uses a 12mm diameter main rotor shaft, which is a good idea.Surprisingly, the Jesus bolt on the rotor head is only 3mm. I would feel better if it was a 4 mm bolt. I wassurprised, even the Vario turbine helicopter uses a 3mm Jesus bolt.Flying:The standard Benzin Acrobatic kit No. 8304 isdesigned for 725 mm length carbon blades. This is theversion I bought. There is also a long boom version,which is designed for 800 mm length carbon blades.The long boom version is used for carrying a payload,doing aerial photography, and smooth flying. Variorecommends the rotor speed be kept under 1400 rpm52ROTORY