I have asked Jeti directly (as has Tom Hunt) for RPM limits. I have unconfirmed (second hand) data that they are around 20K RPM on the motors.
That argues for big, (relatively) slow turning fans, just as they do for big, (relatively) slow turning props.
When I have the data in hand, I'll try to get it back to this thread.
OK, the official word from Mr. Tinka (the "ti" in Jeti) is this:
15/3 and 15/4 are limited to 20K RPM
30/3 and 45/3 are limited to 15K RPM
That said, Tom Hunt told me he's already run the 30/3 to nearly 20K and it didn't fail, but that is by no means a long term test.
I'm not an EDF guy yet, but I think Greg probably has it just right.
OTOH, for the sport flying propeller plane crowd like me, they look really good.
[This message has been edited by BCawley (edited 05-23-2001).]
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