10 May
2018
10 May
'18
12:05 p.m.
On 2018-05-10 4:01 PM, Al Kossow via cctalk wrote:
On 5/10/18 10:37 AM, Al Kossow via cctalk wrote:
The 4" drum in a IBM 650 is said to have rotated at 12,500 RPM.
On 5/10/18 9:29 AM, Paul Koning via cctalk wrote:
Just checked, and the LGP-30
and RPC-4000 drums are both listed as 3600 rpm
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.