Hispano Buchon Prop

[bpk1234]

Can someone please correct me if I am wrong.

The Hispano Buchon had a constant speed prop, it did not have manual control like some models of the Me-109. The pitch was changed automatically through the pilot's throttle movements.

 

[Hardlydank]

It seems that a few props were fitted throughout its life but for the most part I think you are correct

 

[nuuumannn]

Correct bpk1234. The Buchon was fitted with Hamilton Standard propeller as far as I know. It was only the early models of Bf 109s that had manually adjustable propeller pitch; pilots flying the earliest Emils in combat learned they had to grow an additional appendage to operate the propeller pitch lever that was placed rather inconveniently on the instrument panel.

 

[XBe02Drvr]

The pitch was changed automatically through the pilot's throttle movements.

Actually, prop pitch is controlled by a propeller governor, which maintains a constant engine/prop RPM by varying propeller pitch to match prop rotary resistance to engine torque at the RPM selected by the cockpit prop control lever. This makes life a lot easier for a pilot engaged in aerobatics or Air Combat Maneuvering, as it relieves him/her from constantly monitoring the tachometer to keep the engine within RPM limits during aggressive maneuvering. Eyes on your opponent, not in your cockpit.
Cheers,
Wes