<VV> What happened to the prototype modern fan

[Ignacio Valdes]

Fantastic news. I am very interested in this and your progress.

On Tue, Nov 27, 2018 at 9:21 AM kevin nash via VirtualVairs <
virtualvairs at corvair.org> wrote:

> Here's some test results for my new prototype fan. In case the pdfs don't
> open, show,
> or display, here's the short summary:
> 1) My fan acts like the same or better output below 3000 rpm, as the rpms
> climb, my fan really starts to outperform the stock mag fan.
> 2) At 5250 rpm my fan is showing 20% more pressure than the mag fan can do
> in stock form. I figured that this is roughly 1830 cfm at this point.
> 3) My fan is using roughly 2/3 less power than the mag fan is to do a
> better job cooling
> 4) I never actually tested the hp usage for the output shown in this
> particular test...the
> usage figure's came from a earlier test that turned out to be the least
> efficient intake
> shape I could have used... this graph shows much more pressure and flow
> than the earlier test and was done with less intake area... it is almost
> impossible for a fan
> to consume more power with less intake area. If the drive hp ends up being
> unchanged
> from the earlier test, then the fan is actually more like 65% peak
> efficiency.
> 5) I have yet to test higher flowing set-ups...My tests so far have been
> with the lower
> shrouds on, which are a huge restriction to flow... anything that is done
> to increase the
> flow with the stock fan causes the horsepower usage to go up even more.
> For my fan
> there's supposed to be a point where upping the flow causes the hp usage
> to fall.... the
> efficiency of the fan should be enhanced even further(!)
>   The pre-production prototypes are going to make the same output as shown
> in the
> pressure vs rpm graph, except will be doing this at a 1.4:1 pulley ratio
> as opposed to
> the stock 1.58:1 pulley ratio, so as to add a lot of tunability of the fan
> for individual user's... people that need more output at lower rpm's would
> be able to gear the fan
> taller, and others would be able run the fan geared down... way more fun
> that way!
> Kevin Nash
> 1963 Turbo, port fuel injected daily driver
>
>
> ________________________________
>
>
>
>
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