That's interesting Russ. Yes I do believe an excessively small bore-size would represent an airflow issue, even if you can get the same volume air thru it by increasing its velocity. But let me throw another question in response. Looking thru the results of the cozy mail-list search tool on 'Ellison', apparently a small number of CozyMKIV flyers are using the Ellison on their 360's, (Nat, Steve Wright, David Dormier, Marc Zeitlin, and at least one or two more). My understanding is that even the motor on Paul's bench wouldn't produce more (or much more) power than the 360. How can the 360's produce their power if that bore-size is an issue? I've already been seduced, Paul may have 'tried' too many things already.
Tom
Russell Duffy <13brv3@bellsouth.net> wrote:
Hi Tom,
Ken Welter is the one that brought this to my attention when I was thinking of using an Ellison in the past. The bore size of the Ellison EFS-4-5 is mighty small compared to what most of us are using. I'm not saying it won't run, but I now agree with Ken that it seems too small to be optimum for power. It would still be interesting to try.
Rusty
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