Project: Break in Dutch machine
#151
The Shell 0w20 I use is simple motor oil, just use some brake cleaner to flush out some oil and re-oil the bearings and crankpin with afterrun oil. But to be honest it is not really needed. I also have put the engine together w/o any cleaning and it was startable.
#155
Joined: Aug 2002
Posts: 6,296
From: Oxnard, CA
Does anybody know the distance from the motor mount to the center of the crankshaft on a novarossi .21? Also, does the engine need heaters on the sleeve, or without heaters its ok?
Thinking about building one of these
Thinking about building one of these
#156
The center of the crankshaft is 0.5mm above the engine mount. Picco seems to be on the mount. I made spacers for 0 and +0.5mm
Heaters on the sleeve is not needed but when using cartridge heaters it is adviseable to mount them on a kind of heatsink with the temperature sensor of the controler with it so the heat is well spread and the sensor is reading right. You only have to wait longer to get the oil well heated.
Heaters on the sleeve is not needed but when using cartridge heaters it is adviseable to mount them on a kind of heatsink with the temperature sensor of the controler with it so the heat is well spread and the sensor is reading right. You only have to wait longer to get the oil well heated.
#159
Joined: Aug 2002
Posts: 6,296
From: Oxnard, CA
#162
If you want to make it work on 12v you better get a 12v version of the temp controler.
With every device you get a manual how to connet but there are 3 devices to connect to the 12v:
12v - power switch - amp meter - motor
12v - temp controler - temp sensor hanging in the oil.
12v - power switch - relais switch from temp controler - heater.
It is wise to mount the temp sensor and the heaters to the same aluminium surface so the sensor does sense the heater very well. If they are mounted apart from each other then (for sure with cartridge heaters) the heater will shoot into a high temperature causing burning oil arround it before the sensor will sense the heat.
With every device you get a manual how to connet but there are 3 devices to connect to the 12v:
12v - power switch - amp meter - motor
12v - temp controler - temp sensor hanging in the oil.
12v - power switch - relais switch from temp controler - heater.
It is wise to mount the temp sensor and the heaters to the same aluminium surface so the sensor does sense the heater very well. If they are mounted apart from each other then (for sure with cartridge heaters) the heater will shoot into a high temperature causing burning oil arround it before the sensor will sense the heat.
#163
Joined: Aug 2002
Posts: 6,296
From: Oxnard, CA
#164
Tech Regular
iTrader: (1)
Joined: Feb 2010
Posts: 421
Why are you trying to control the temperature of the thermocouple? A thermocouple is a measuring device made up of 2 dissimilar metals used to measure temperature. The 2 wires are welded together and when a change of temperature occurs it creates a voltage that is then measured and depending upon the types of metals used you can then compare that voltage to a known standard and determine the voltage.
#165
In the attachement a simple diagram



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