British PAW 2.5 cc Diesel

Version featured in this [age is the RC engine equipped with a primitive but effective throttle and mufti-positional muffler

Design History:-
Designed and Manufactured in England by the Progress Aero Works, of Macclesfield.

Design Features:-
Front induction; radial porting; simple effective carburetor; radial exhaust ports and exhaust collector ring with variable exhaust muffler positions

Specifications:-

Displacement: 2.47 cc
Bore 15.16 mm
Stroke: 13.67 mm


Comments:-
This model airplane engine was all gummed up and virtually frozen from years of storage after use. After an hour or so of softening the old oil and turning by hand she is shown here all freed up and anxious to run again.

http://youtu.be/fApvpZWAwYk

Russian MK 12B

The similarity of the MK 12 b to the Webra series 2 engine shown below is probably no accident 

Different production runs of MK12 b engines 

Design History:- 
Designed and manufactured in Russia in the mid 1960's

Design Features:-
Early versions featured a removable front housing;
later models featured a single piece crankcase;
rear induction; and
crankshaft supported on ball bearings

Specifications:-

Fuel:	Ether/Petroleum/Oil
Cycle:	2T
Data
Cylinders:	1
Displacement:	2,45 cm³
Bore:	15,5 mm
Stroke:	13 mm
Weight and Dimensions
Other Information
Model Year	1980
Manufacturer
U.S.S.R  (C.C.C.P.)
Distributor
U.S.S.R. (C.C.C.P.)

Comments:-

The engine is an example of an early production run (serial number 44) it comes complete with several production flaws and a  lower than average compression, which makes it difficult to hand start. 

 http://youtu.be/69t4qKp6owA