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Product Description
Please read my article in aeromodeller No 929, September/October2014.
For the ED Racer. Now you can build a contrarotating twin model because it can do CW and CCW rotation. This is expiremental but infact works quite well. The mixture now enters the crankcase through a slot between backplate and rotor. The centrifugal force helps to overcome the extra resistance. You can chamfer the edge of the slot to maximize the flow-through of the mixture. Tip: when mating the backplate with the engine insert the rotor first. Use watery thin cyano to add strength. I have added an extra ring of material to compensate the loss the 3D printer causes at the edge.
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