8 Jun
2013
8 Jun
'13
6:10 a.m.
On Jun 8, 2013, at 3:36, Dave <dave.g4ugm at gmail.com> wrote:
It sure does. I remember calculating it out when I had the idea to make
a half-inch tape recovery machine with DC servos (essentially a streamer).
To start and stop a full reel as fast as even streamers do takes some
REAL juice.
- Dave
>>>
The motors can't be that big,
>>> surely?
They were HUGE in the early drives. I think its more re-wind speed. Time spent re-winding
is time the computer is idle. I remember blowing an auxiliary generator with tape drive
rewinds.
You could hear it slow as the drives went to rewind. When it stalled there was a
"bang" and a puff of smoke and many odd words from our small Scottish engineer
who I am sure was called "Jim"
A reel of 1/2" tape has serious angular momentum.....