Rap 24 hp semidiesel, first start attempt in 20 years.

This engine was built in 1930 or earlier. Have been stored outdoors for the last 20 years. After spending hours getting all parts movable this is the first start attempt. Seems to be low start pressure (6.5 bar) and low capacity in start air hose that is the biggest problem.

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Rap 24 hp semidiesel, second start attempt.
This video illustrates what happends when these two stroke semidiesels run out due to too much oil in the crankcase. With my left hand, I block the injection pump, so from that time the engine run on lube oil only, no diesel at all. I have heard lots of stories about this from decades ago but this is the first time, to my knowledge, that it is captured on video. Luckily we had blocked most of the air intake prior to starting and ended at somewhat over 1000 rpm. Max operating rpm is 425-450. With full air supply, I would guess this engine would reach thousands of rpm and I could only guess what would have happened then... The electric glowplug short circuited so we had to rely on the propane burner which had slightly low temperature. In this startattempt, we used an acetylene burner and got the glowplug bright red. The crankcase was, unfortunately, filled with too much oil so the engine was running on its lube oil from the crankcase instead of diesel. Still some trouble with the fuel injection, doesn't feel right when injecting diesel manually.





Rap 24 hp semidiesel, third start attempt, the successful one.
More than two years since the last start attempt. Too many other projects have had priority. We used a couple of hours to get things running smoothly again and pumped out more than 10 litres of rainwater from the crankcase but when we tried to start, it went far better than expected :-) The engine started running backwards and at time 3:00, I reduce the rpm and give it a couple of manual fuel injections to change direction to forward. Enjoy!





Hundested engine #3 - 45 HP semidiesel
- Category: Marine Hot Bulb Engines - Manufacturer: Hundested Motorfabrik - Construction: Vertical onecylinder twostroke hot bulb (semidiesel) engine - Power: 45 HP - Ignition: Semidiesel - Fuel: Diesel - Cooling: Seawater - Country: Denmark (Hundested) Specifications page: http://motorsamling.com/files/spec.asp?5-014 Category page of stationary gasoline engines: http://motorsamling.com/files/category.asp?cat5





100 H.P. Fairbanks Diesel at Oblong
This is a 100 H.P. Fairbanks semi-diesel on display at Oblong Ill. They also use a Fairbanks engine to compress the air to start it and another to pump the water while running. Nice display.




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