R21 Plus5


   Displacement: 3,49 cc
   R.P.M. (max power): 34.500 RPM
   Practical range: 6.000-36.200 R.P.M.
   Bore x stroke: 16,26x16,80 mm
   Sleeve: 5 ports
   Rear ball bearings: steel
   Fronto ball bearings: steel
   Crankshaft: 14,5 mm - turbo
   Carburetor: aluminium - 9 mm - slide
   Glowplug: Turbo (C6TGC)
   Exhaust position: rear
   Starting: -
   Weight: 363 g
   Fuel type: 25% nitro
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instruction-manual

 

FEATURES

06009   08559 13   biella-R7   28028
Piston:
The material of this piston is choosen for its excellent strength to weight properties. The shape of the top of the piston is our 'Compact Combustion Tecnology' which improves the efficiency of the engine. This piston is also milled from a single block which further increases the strength.
  Sleeve:
The sleeve has 5 transfer ports and an exhaust with booster ports. The special shape and positioning of the ports, covered by a patent, improve the internal fluid-dynamics to obtain the maximum possible performance.
  Conrod:
The R7 conrod is made from a superlight alluminium which has been checked ultrasonic. The specific form of the R7 creates little turbulence inside the engine while running.
  Combustion chamber:
The combustion chamber is supported by an O-Ring which is placed between the combustion chamber and the crankcase to reduce the vibrations of the combustion chamber.
candela-turbo   24063        
Glowplug:
The glowplug of engine is a Turbo type glowplug. Turbo glowplugs have a different shape than Standard glowplugs and therefor are not interchange able with engines that are using Standard glowplugs.
  Carburetor:
This carburettor is made from plastic and have a sliding throttle valve  (reverse type).
       

 

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