Big stir plate, bar and motor? please help.

[mikescooling]

Hey guys, I'm looking to make some BIG starters, like 5 liter flasks and bigger.
1) What size motor or fan size will I need to pull a bigger stir bar?
2) Will I need a bigger stir bar (like 2" long)?
3)Does anyone know of one 12V-DC power supply I could use to power all four stir plates?
5) When I turn on my home made stir plates, I have to bump the fan on high to get it turning, then adjust it to the correct speed, is their anything I can do to fix this?
Thanks for any help.

 

[MachineShopBrewing]

I built the standard one that is floating around the forum. The one with the $9.99 radio shack project box and a computer fan, and it spins my 5L flask no problem. I suppose it may even spin bigger if it had to. I just have a standard stir bar also.

 

[mikescooling]

Thanks for answering MachineShopBrewing. What I'm doing now (to get by) is switching two 2000ml flasks every 12hrs with another two flasks crashing in the fridge. But doing this can be a pain, so I was thinking bigger flask, jug, or even small carboy? I freeze yeast, and that requires steping up several times before I get to the point of a 2000ml flask. My life is basically controlled by stir plates. Lots of times I do two brewdays back to back, my total yield of two brew days is about 6 carboys ish, like this:
enough yeast for all of these.

 

[MachineShopBrewing]

That's cool. I made 6 total of the regular stir plates. I don't have enough flasks for all of them, but if you did that with 2000ml flasks then you could pitch a different yeast in each one if you wanted to.

 

[dave1226]

Thanks for answering MachineShopBrewing. What I'm doing now (to get by) is switching two 2000ml flasks every 12hrs with another two flasks crashing in the fridge. But doing this can be a pain, so I was thinking bigger flask, jug, or even small carboy? I freeze yeast, and that requires steping up several times before I get to the point of a 2000ml flask. My life is basically controlled by stir plates. Lots of times I do two brewdays back to back, my total yield of two brew days is about 6 carboys ish, like this:
enough yeast for all of these. http://s1296.photobucket.com/user/mikescooling/media/IMG_20130818_132619_059_zps831ed04c.jpg.html

I wanna be your brew friend! 😜😁😉🍻

 

[mikescooling]

I've been freezing yeast with 15% glycerine, let me tell you I wish I had 6 stir plates. I have 3 with one more on the way, I was waiting on building that stir plate until I got some feed back from the kids here? My motor choices look like this:

 

[mikescooling]

I wanna be your brew friend! 😜😁😉🍻

The beer is tapped in the kitchen go pull your self a pint or two.