Its hydraulic. There is a backup electrical motor for use when the DB engine is off.
The battery at the time were not what we we are use to today. This is why it's slow before eng is on and faster after when the circuit is switched to hydrau.
The 109 was an impressive design for it's time.
This has been discussed alrdy extensively and what we hve now is very accurate (in fact a reference for any future sim)
~S
Last edited by TomcatViP; 08-14-2011 at 12:27 PM.
Reason: Edited : wrong assumption
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