Sunbeam Manitou

There were two Claudel-Hobson carburettors and two British Thomson-Houston (BTH) ignition magnetos.

As was not unusual for a Sunbeam engine, it was only ever fitted to a single aircraft for trials, a Short 184 seaplane, and never went into production.

In typical Coatalen fashion, he redesigned the engine substantially even though this was just a one-off with no other likely sales.

Another change affected the stroke, also a technique from the Arab, where it had been responsible for the engine's failure.

The difficulty is that this gives a slightly different piston stroke for each bank, leading to unbalance and possible vibration problems, as with the Arab.