The Beagle had a single screw propellor driven by a horizontal twin - cylinder expansion engine rated at 160 nhp .
Another early installation was in HMS Beagle ( 1854 ) ( and possibly the other 5 Arrow - class gunvessels ) .
The HMS Beagle had a single screw propellor driven by a horizontal twin - cylinder expansion engine rated at 160 nhp .
Another early installation was in HMS Beagle ( 1854 ) ( and possibly the other 5 Arrow - class gunvessels ) .