Hi Hiker
Do you have preformance specs yet? I've started a dual rotor saw blade alt also. Actully I've started 3 disc alts but I've never finished one.
Motor conversions are much faster to build.
I won't use saw blades again. I picked up 8 ten inch blades from the sharpening shop.
They were in there recicle dumpster. They are comercial blades with a 1.75" center hole. These have been to hard to drill and cut.
I've machined 2 speaker end plates as hubs to mount the saw blades. I'm only using 6 blades. 3 per side. This makes each disc slightly over 1/4" thick.
I'm using 12 Lowes ceramics on each disc. I'm winding 9 coils for the stator as per DanB designs.
Don't expect much power from these ceramics. This is just a learning thing and fun.
I'm using speaker baskets for the frame and support. I'll post pics when things progress enough.
JK TAS Jerry