Recent Topics
BITOG using excessive CPU power?
by Kibitoshin
06/18/18 05:10 AM
Any news on what happened to this plane?
by Exhaustgases
06/18/18 02:36 AM
E4OD fluid ?
by Exhaustgases
06/18/18 02:23 AM
Update password ?
by meadows
06/17/18 11:59 PM
Delayed Sleep Phase Disorder
by Reddy45
06/17/18 11:56 PM
Nissan DLR put 0w20 in car that specs 5w30. worry?
by CrAlt
06/17/18 10:40 PM
revive Nicd battery
by Donald
06/17/18 10:27 PM
Need help finding an apartment for friend
by RazorsEdge
06/17/18 10:07 PM
ceratec with redline 5w30?
by 08z06
06/17/18 09:53 PM
does your COMCAST modem have weak wifi??
by edwardh1
06/17/18 09:50 PM
I hate stuck thermostats
by jakewells
06/17/18 09:49 PM
Mag1 75w90
by SavagePatch
06/17/18 09:32 PM
Old batteries at HD
by bbhero
06/17/18 09:27 PM
Buying a CPO Toyota - still get inspected?
by Parlay_Slow
06/17/18 09:08 PM
Water Pump Paper Gasket With RTV? Longevity?
by nobb
06/17/18 08:22 PM
Who makes Briggs & Stratton oil?
by spk2000
06/17/18 08:13 PM
Shure stylus replacement
by aquariuscsm
06/17/18 07:54 PM
Any 'crazy UCL overdose' fans out there?
by addyguy
06/17/18 07:11 PM
Source for Castrol Edge Supercar 5w50 oil?
by Rainier42
06/17/18 06:50 PM
Cherry vs orange hand cleaner
by JHZR2
06/17/18 06:27 PM
Newest Members
mostdecent, T1TN, Piper58, dunlop0078, Truth_Syrup
65258 Registered Users
Who's Online
57 registered (4WD, 2009Edge, BeerCan, BigCahuna, antik, aquariuscsm, 5 invisible), 1057 Guests and 39 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65258 Members
67 Forums
285505 Topics
4764742 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#4455391 - 07/10/17 03:18 PM Windmills..Backyard type...which way do they point
tgrudzin Offline


Registered: 09/30/14
Posts: 157
Loc: Chicagoland, IL
You have all seen those backyard windmills, about 4-6 high that turn in the wind? I never paid much attention as to how they worked until I purchased and assembled a used one for my 85 year old mom. The windmill fan blade will turn and the whole tops pivots based on the wind direction. But which way? For example, lets says the wind is coming from the North. Do the rotating fans blades turn into the wind, so they would face North, or are the pushed to the South? I thought maybe the direction of the blades might make a difference, but I think the direction of the blades only changes which way the fan blade rotates? Anyone actually know?

Top
#4455398 - 07/10/17 03:29 PM Re: Windmills..Backyard type...which way do they point [Re: tgrudzin]
440Magnum Offline


Registered: 02/01/09
Posts: 8754
Loc: Texas
Originally Posted By: tgrudzin
You have all seen those backyard windmills, about 4-6 high that turn in the wind? I never paid much attention as to how they worked until I purchased and assembled a used one for my 85 year old mom. The windmill fan blade will turn and the whole tops pivots based on the wind direction. But which way? For example, lets says the wind is coming from the North. Do the rotating fans blades turn into the wind, so they would face North, or are the pushed to the South? I thought maybe the direction of the blades might make a difference, but I think the direction of the blades only changes which way the fan blade rotates? Anyone actually know?


If its a scaled-down model of a classic ranch/farm type windmill, he tail vane of the windmill is what aims it into the wind. The tail vane is usually behind the "turbine" so that the blades aren't shadowed by the tower, in other words it rotates the turbine face-on into the wind. In the picture below, the wind would be coming from the right toward the left:



In a full-scale windmill, the tail is hinged and a lever at ground level lets the operator flip it so that it drives the blades side-on to the wind so that the windmill will not rotate (a band brake is also applied). Further, the tail vane is offset and spring-loaded so that in very high winds, it will start to slew the turbine wheel sideways and out of the direct wind as a sort of crude governor or self-protection. The image below shows a windmill that has been shut down by manually flipping the tail vane sideways to the rotor:

_________________________
'66 Dodge Polara & '69 Dodge Coronet R/T both 440/727
'08 Ram 1500 4.7/545RFE
'12 Challenger SRT8 392/6-speed
'99 XJ 4x4 4.0/AX15, '14 WK2 4x4 3.6/8HP

Top
#4455408 - 07/10/17 03:39 PM Re: Windmills..Backyard type...which way do they point [Re: tgrudzin]
Yah-Tah-Hey Offline


Registered: 05/26/14
Posts: 3394
Loc: Columbus,Nebraska
Hard to understand how anyone could be confused as to how this device works.

Top
#4455434 - 07/10/17 04:10 PM Re: Windmills..Backyard type...which way do they point [Re: Yah-Tah-Hey]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: HosteenJorje
Hard to understand how anyone could be confused as to how this device works.


Yes - by simple observing it on a windy day, on can deduce it's operating parameters.

BTW, it doesn't matter which direction the wheel rotates (CW or CCW)
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

Top
#4455437 - 07/10/17 04:15 PM Re: Windmills..Backyard type...which way do they point [Re: Linctex]
tgrudzin Offline


Registered: 09/30/14
Posts: 157
Loc: Chicagoland, IL
Thanks everyone.
(The winds on the day of setup was soft and changing direction often.)

Top
#4455601 - 07/10/17 07:30 PM Re: Windmills..Backyard type...which way do they point [Re: Yah-Tah-Hey]
Silk Online   content


Registered: 07/26/03
Posts: 4549
Loc: New Zealand
Originally Posted By: HosteenJorje
Hard to understand how anyone could be confused as to how this device works.


My wife does - if I say there is a northerly wind, she asks if the wind is coming from the north, or going to the north. When she asks why, I say just because. Do you face into the wind, or put your back to the wind...I guess that's the way she sees it.
_________________________
1987 BMW R65 - Penrite V Twin 20/50
2005 Nissan Expert - Gulf Western 10W-40
1996 Volvo T5 - Penrite HPR15 - 15W-60. Ryco syntec filter.

Top
#4455650 - 07/10/17 08:21 PM Re: Windmills..Backyard type...which way do they point [Re: Silk]
Rand Offline


Registered: 08/20/03
Posts: 12638
Loc: NE,Ohio
Originally Posted By: Silk


My wife does - if I say there is a northerly wind, she asks if the wind is coming from the north, or going to the north. When she asks why, I say just because. Do you face into the wind, or put your back to the wind...I guess that's the way she sees it.


I actually understand that one because its backwards to how everything else works.

A north wind is from the north

While anyone traveling north is going in the opposite direction.


A windmill in normal operation on the other hand, the tail(vane) is always going to be behind the blades.. just because of how it works to steer it into the wind.
_________________________
2017 Jeep Cherokee Trailhawk V6

Top