I've been following this thread for a while, and having used both the straight-vane and spiral-ramp GE Activators (in the large-capacity Dispensall) thought I'd add my $0.02.
The 18-pound straight-vane Activator shown below, even with those tall vanes at the base, has surprisingly good turnover with that fast 100 OPM stroke, but isn't effective at getting rid of air bubbles, especially on items like sheets. So while the wash cycle circulates evenly, the air-laden load just thrashes around at the top when it's rinsing. I haven't had a standard-capacity machine yet to try the 3-vane version (I have that one in Turquoise, with the rubber filter mount), so I'm not sure how well it works. Steve, interesting that the rollover would be poor even with a light load and high water level; perhaps it has something to do with the vanes being too wide, especially when you consider the size of the (standard) tub and the agitation speed!!
For me, the 18-pound Ramp Activator wins hands down. It greatly increases the working capacity of the tub (I believe it was Greg who mentioned on the phone that GE machines were one of the few that could actually wash their claimed capacity); I can wash a big Bob-load using that agitator that I wouldn't even think about stuffing in with the straight-vane!! Then there's the additional fun factor for anyone "rollover-minded" like me...I love that slurping sound it makes on a small load, and I refer to the pulsing action that Gene described as the "dip-roll" motion. You can see the load "dip" up and down and travel further down the centerpost with each stroke.
I'd be interested to see how the blue 8-vane 18-pound Activator like the one in Matt's machine works; I'm guessing that with lower base vanes it would have better turnover. I think that if GE made an agitator without those extra-large post vanes it would work much better, though probably not as good as the tried-and-true Ramp Activator!!
My question is: Did they produce ramp and straight-vane equipped machines at the same time, or alternate between the years?
--Austin
