This is what I will explain in the Caudron 430 user manual. It is because of this pneumatic system that Helene Boucher died, on a go-around, the pitch of the propeller did not allow the plane to regain speed, the plane crashed. If we simulate this in flight simulator most of the simmers would complain.Because it would only allow one takeoff and one landing. Without this pneumatic system the piloting is easier and allows to make several stopovers. But there was no lever for the propeller pitch either.
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