[pianotech] re.:Bladeless fan

[Chuck Vetter]

I just read a CR article that looked at the bladeless fan and said it did as 
they claim.........and so did a conventional model for about $20.
Chuck

----- Original Message ----- 
From: "Don Mannino" <donmannino at ca.rr.com>
To: <pianotech at ptg.org>
Sent: Sunday, June 20, 2010 6:06 PM
Subject: Re: [pianotech] re.:Bladeless fan


> Well, I'll take "Doppler shift of echoes" but not "from echoes."  But 
> you're
> right, it's nit-picking.
>
> :-)
>
> DM
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On 
> Behalf
> Of Ron Nossaman
> Sent: Sunday, June 20, 2010 10:44 AM
> To: pianotech at ptg.org
> Subject: Re: [pianotech] re.:Bladeless fan
>
> Don Mannino wrote:
>
>> But the flutter effect from the sound bouncing off of a spinning fan
>> (which I think is what you are referring to) would certainly be
>> eliminated, so I agree it would be interesting.
>
> Yes, that's a Doppler shift from echoes off moving blades.
>
>
>>I'd like one to keep me cool on the warm  summer nights!  No noise!
>>
>> But then again, not at that price.
>
> Me either.
> Ron N
>
>