Edited : Micro Generator with Cox .049 Diesel : Pulley Ratio : 1 to 1

Описание: by Steven Stanley Bayes
www.Steven-Stanley-Bayes.com

Engine : Cox .049 SureStart Diesel

Muffler : Not Installed

Pulleys : Engine Pulley : 1.5cm, Dynamo Pulley : 1.5cm

Pulley Ratio : ~ 1

Dynamo : RS555, Brushed DC Generator ( Dynamo ) and a 12 VDC Electrical Motor

Fuel : 8mL Ether ( John Deere 80 Starter Fluid ), Kerosene : 7mL, Castor Oil : 5mL, Cetone Booster ( 2 Isopropyl Nitrate & Xelone ) 1mL. This is : 38% Ether ( John Deere 80 Starter Fluid ), Kerosene : 33%, Castor Oil : 24%, Cetone Booster ( 2 Isopropyl Nitrate & Xelone ) 5%

Amount of Fuel : 20mL

Preliminary Start without the Dynamo Attached : Yes, at the same settings. Reason : to heat up the engine for the start with the dynamo attached.

Propeller : 3.125 Inches Diameter, 2.5 Inches Pitch, 3 Blades

Belt : Elastic Band. Low tension. Higher tension also tried. Unable to find strong belt which is not flat but either square or rounded.

Dynamo Fan : Installed

Electrical Load : Two loads used. The fuel burned before being able to install the third one. Load 1 : 10Ω, 10W, 5%. Load 2 : 7.5Ω, 20W, ~5%. Load 3 ( not used but available ) : 5Ω, 30W, ~5%.

Fuse : 3A

Spring Starter : Yes

Other Means to Start the Engine : Not Used

Level of Spring Start Engagement during Successful Starts : Not fully engaged. Around 2 compression only.

Settings : Air Valve : 75% Open ; Fuel Needle Valve : 3.5 turns Open ; Compression : Close to Maximal but Not Maximal ( the compression screw was screwed gently until some resistance shown and backed until no resistance and a tiny more ). Increased after the start to be almost the maximal. When the engine was hot, the compression was adjusted to close to maximal ( until some compression screw resistance was found ) and the Air Valve ( Throttle ) was nearly fully open.

Engine Control : The engine exhibited a very good ability to be controlled by all controls : Air, Fuel and Compression. When load applied, the engine self increased the RPM. When load applied the dynamo resistance increases, the load to the engine increases trying to decrease the RPM and the engine sucks more fuel and air and increases the RPM. Engine self feedback.

Voltage and Current Achieved : Voltage without load : 24 to 30VDC. Voltage with load ( Load 1 and Load 2 ) : 3 to 4 VDC. Current : 0.5A or lower with all loads. Load 2 established : 4.025VDC and Load 3 : 3.2VDC, thus, 2W power. This is very strange. Looks like the dynamo cannot perform very well or requires huge RPM to do so. With 1 : 1 pulley ratio, the power achieved is lower than with 0.5 ( engine ) to 1 ( dynamo ) ratio although the dynamo RPM were higher with 1 to 1 pulley ratio.

Greasing the Pulleys Before Start : No.

Temperature of the Engine and the System : Room ( 20ºC to 25ºC )

Temperature of the Fuel : Room ( 20ºC to 25ºC ). Because Ether had been derived from a John Deere 80 Starter Fluid can with compressed Ether and propellants, the Ether was freezing when squeezed out. Thus, the fuel had to be warmed up. The fuel was put in a measuring glass where the fuel was mixed. Then the measuring glass was dipped into a jar with hot water and kept for a few seconds. Then the fuel was shaken to mix up even more at the new, high ( room ) temperature.

Noise : Yes but not as much as before because of the low RPM. Generally, the engine is powerful and noisy. Some reduction may be possible with the muffler. Not as much so the power is not reduced.

Messy : Yes but kept away by the yellow plastic protection installed around the dynamo. Exhaust fluids have not been canalised. Can be canalised through a pipe attached to the exhaust ( best modified with a bigger hole ) with a nipple attached to the exhaust to allow attachment of the exhaust pipe.

Conclusion : Only 2W achieved. The dynamo seem to be incredibly stubborn and works at around 3 to 5V and around 0.5A regardless of the RPM. Looks like huge RPM may be needed to make the dynamo perform to some extent. Poor dynamo performance was expected but not so poor.