QUOTE (aircraft_electrician @ Jan 10 2006, 06:35 PM)
TMann,
For your first question, I'm not entirely sure. I have both aero and vac 51s but have never had a problem with blobs of ink.
Your second question I can answer though. It depends on the filler. The original steel vacs required one to push the plunger nine times with the nib immersed in ink, and on the last downstroke, one would hold the plunger down, remove the nib from ink, then release the plunger, UNLESS it was a red band filler. These were quite rare and I believe only made in 1946. Anyway, to fill a red band 51 requires only 3 downstrokes of the plunger and the plunger would be released with the nib still in the ink.
The plastic vacs were filled in the same manner as the standard steel vacs, with the plunger held down and not released until the nib was removed form the inkwell, though I'm not sure of the actual number of downstrokes required.
As far as I know, one doesn't need to squeeze the aero filler until after it's removed from the inkwell, but I supose if one is having a problem with ink blobs I suppose it might help.
I hope this helps,
Tom
Thanks, Tom. The two "51"s that I've had for any length of time have been aerometrics, so when I started using my new vac "51" last night, I was somewhat surprised to get a large ink blob when I first started using it. I'll have to be more careful with my filling technique and see if it's a recurring problem.

TMann