there is a picture of a small 10K RPM drum here http://museum.ipsj.or.jp/en/computer/device/magnetic_drum/0017.html
On 5/10/18 10:37 AM, Al Kossow via cctalk wrote: > > > On 5/10/18 9:29 AM, Paul Koning via cctalk wrote: > >> One that comes to mind is the DEC RS04. It spins at roughly 3600 rpm (a >> hair less, so obviously a 2 pole induction motor running off 3-phase 60 Hz >> power). > Vermont Research drums (model 1175B) spun at 3450 rpm 3ph 220v, The HP 2773 > on the 2000A TSB was from VR so I expect RPM > would be similar for most drums of similar diameter. > > from > https://ia800809.us.archive.org/27/items/TNM_Drum_memories_-_Vermont_Research_Corp_1966_20170826_0105 > > > > >
