Hit and miss Kerzel engine..finally finished!
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- Опубліковано 14 жов 2024
- Finally, after more than 18 months of on and off working on this project, she is finally finished.
Flywheels are home cast aluminium with lead rims and capped with stainless tyres. Main housing was crude cast and machine finished for with cast iron liner. The original cast iron piston and rings were temporarily replaced, whilst playing with compression ratios, with an aluminium version and a viton T seal. This has lasted for 1 hour running so far and I intend to leave in place to see how it lasts.
The cam profile was adjusted for longer duration as the engine seemed to be choking.
Ignition is home built CDI fitted in the base with a home wound HT coil external. Supply is simply 4.5 v alkaline via jack plugs. Fuel is Colemans camping fuel with 100:1 mix 2 stroke oil.
Awesome👏👏👏
Cast iron for cylinder liner and steel for the crankshaft. Some bronze was also used for bushings. Silver steel ( drill rod ) for pivot pins.
A thing of beauty creach well done. hope your well. Fossy
Hey Fossy.. many thanks. Trust you are well too :-)
Good looking engine, runs great.
The flywheels are cast aluminium with lead filled rims capped with stainless rim rings all to increase mass.
Nice job creast!! What did you use for the ignition system? I'm getting ready to build one of these engines and looking for different viewpoints.
Thanks Warren
Hi Warren,
It was a long haul for me to get the ignition small enough to fit in the base and be reliable. I ended up using the HT supply from ot40.com/cdi_ignition.htm but not the PIC based trigger system. I wanted to use a hall effect switch triggered by a magnet on the cam gear. The HT coil was home wound and is based on that used on Jan Ridders Blokker circuit (ridders.nu/Webpaginas/pagina_blokker_vonkcircuit/blokker_crcuit_frameset.htm). I did try his original circuit but it was not suited to the Hall effect switch which won't work on 1.5v. The blokker coil is fine but too much soldering can loosen the terminal legs so I wound my own. I also used some circuitry to just deliver a quick pulse to the thyristor so there was no chance the coil was permanently energised. For testing purposes I started with a car coil but that is almost as big as the engine!
creast Thanks much. I will have a look at the information.
Nice engine, it just saddens me to see a modification, to a Chinese copied US machine
Not sure I understand your comment re: chinese copied machine? I know you can buy these type of engines online but in constructing one yourself has the benefit of the journey (and pain) and not the destination :-)