Hi all,
Two pipes were connected to the underside of the coolant return pipe, located at the top of the engine.
The two pipes were routed across to the other side of the engine, between the end and centre cylinder banks.
The purpose for these two pipes is not clear or to where on the engine they were eventually connected.
As the pipes were connected to the coolant return pipe, it would seem hot coolant from the engine was carried in the pipes.
My only assumption is that these pipes supplied hot coolant to the housings of the two carburettors, thereby ’pre-heating’ both of the carburettors.
This would have helped preventing icing up, which may have been more of a problem for seaplanes more than land based aircraft.
The pipes were made from 0.8 mm and 0.5 mm diameter tube.
Mike
