Hopefully both more precise than my swamp cooler or roof squirrel cage. 

Karl Wolz
Sent from my electronic umbilicus

> On Jan 2, 2016, at 6:01 PM, Jim Felder <jim.felder@gmail.com> wrote:
> 
> But that's about as far as it goes. My compass has bearings. My turbo has bearings. 
> 
> Jim
> 
> Sent from my iPad
> 
>> On Jan 2, 2016, at 6:42 PM, Karl Wolz <wolzphoto@q.com> wrote:
>> 
>> Both have bearings. 
>> 
>> Karl Wolz
>> Sent from my electronic umbilicus
>> 
>>> On Jan 2, 2016, at 5:29 PM, Jim Felder <jim.felder@gmail.com> wrote:
>>> 
>>> No, Edward best I can guess. Point is one has an electric motor the other does not..
>>> 
>>> Jim
>>> 
>>> Sent from my iPad
>>> 
>>>> On Jan 2, 2016, at 5:19 PM, Karl Wolz <wolzphoto@q.com> wrote:
>>>> 
>>>> You talkin to me??
>>>> 
>>>> I know the difference; have both. Both relatively low tech. 
>>>> 
>>>> Karl Wolz
>>>> Sent from my electronic umbilicus
>>>> 
>>>>> On Jan 2, 2016, at 4:03 PM, Jim Felder <jim.felder@GMAIL.COM> wrote:
>>>>> 
>>>>> A swamp cooler is an evaporative cooler with a fan. Way different from a roof turbine. 
>>>>> 
>>>>> Jim
>>>>> 
>>>>> Sent from my iPad
>>>>> 
>>>>>> On Jan 2, 2016, at 3:42 PM, Edward Maglott <emaglott3@GMAIL.COM> wrote:
>>>>>> 
>>>>>> that sounds a lot less impressive.  it does mention furnace blowers as one
>>>>>> of it's main applications.
>>>>>> Edward
>>>>>> 
>>>>>>> On Sat, Jan 2, 2016 at 3:32 PM, Karl Wolz <wolzphoto@q.com> wrote:
>>>>>>> 
>>>>>>> I believe they're referring to the turbines mounted on home roofs. Low
>>>>>>> speed and low resistance with no motor.
>>>>>>> 
>>>>>>> Karl Wolz
>>>>>>> Sent from my electronic umbilicus
>>>>>>> 
>>>>>>>> On Jan 2, 2016, at 11:56 AM, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:
>>>>>>>> 
>>>>>>>> I don't lay any particular importance to
>>>>>>>> the "turbine" designation.  I
>>>>>>>