Hydromatic quick-feathering propeller / Hamilton Standard Propellers service instructions Model 4 synchronizer : service instructions / Hamilton Standard Propellers, division of United Aircraft Corporation Propeller counterweight governors : parts catalog / Hamilton Standard Propellers Propeller hydromatic governors : parts catalog / Hamilton Standard Propellers Hamilton Standard. Overhaul manual, Spinners for propeller models 43E60 43H60 24260 34E60 Hamilton Standard. Hydromatic quick-feathering propeller