Вот нашел кое-что. Это не конкретный пример, но описание работы Gnome monosoupapes из которого я понял, что эти двигатели были граздо более пожароопасны чем другие типы ротативов. Заодно я наконец понял что означает "monosoupapes"Сообщение от An.Petrovich
Profile Publications - Aircraft Profile 079 (страница6):
The late model Gnomes, starting with the single-ignition nine-cylinder 100-h.p. model, were known as "Monosoupapes". This meant that each cylinder was fitted with only one valve instead of the traditional two. Earlier models had the exhaust valve in the cylinder head but the intake valve was in the top of the piston, where it worked automatically as a result of differing pressures in the cylinder and in the crank-case into which the air-fuel mixture had been drawn somewhat in the manner of the well-known two-stroke-cycle engine. This feature had been trouble¬some, so the intake valve was eliminated on the "Monosoupape" models. The fuel was passed into the cylinder through bypass ports similar to those of the two-stroke engines. All Gnomes were wasteful of fuel because of the passage of a certain amount of fuel mixture into the cylinder on the non-firing part of the cycle. Discharge of this unburned mixture into the cowling created a serious fire hazard.
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