Engine for model

Abstract

The present invention provides an engine for model in which the number of parts can be reduced, the engine can be manufactured easily, the engine can be assembled for a short time, and the engine can be manufactured inexpensively. An engine for model in which a crankshaft is rotatably disposed in a crankcase, a piston is fitted in a cylinder body such that the piston can reciprocate, the cylinder body is mounted on an upper portion of the crankcase, the piston is connected to the crankshaft through a con-rod, wherein the cylinder body is integrally formed with a cylinder portion into which the piston is fitted such that the piston can reciprocate, and a heat sink head portion formed in an upper cylinder portion.

1 . An engine for model in which a crankshaft is rotatably disposed in a crankcase, a piston is fitted in a cylinder body such that the piston can reciprocate, the cylinder body is mounted on an upper portion of the crankcase, the piston is connected to the crankshaft through a con-rod, wherein 
 the cylinder body is integrally formed with a cylinder portion into which the piston is fitted such that the piston can reciprocate, and a heat sink head portion formed in an upper cylinder portion.    
   
   
       2 . The engine for model according to  claim 1 , wherein the cylinder body is a cast of aluminum alloy having much silicon content.  
   
   
       3 . The engine for model according to  claim 1 , wherein a surface of the piston is subjected to a surface processing of nickel-mixed plating.