The graph shows the torque on the transfer shaft at the initial impact of the wind load on our 14 foot model of our Wind Powered Generators. This is before the blades start turning. It is the initial torque due to the wind. The initial torque is the proper reference to compare between various types of wind energy devices. After the initial torque, when the blades turn, or in any processes later, a comparison between wind energy systems becomes speculative.
When you are comparing products, look at the initial startup torque. ASK what the startup torque is. If our competitors try to confuse you with rotation speeds compared to gear ratios, or anything else besides the actual torque force created by the initial impact of the wind on the blades then DEMAND to know the initial torque on the transfer shaft created by the blades. If our competitors pretend to not understand what you are demanding, send them to our web page, and DEMAND that they give comparitive data. THINK! ASK! DEMAND TO KNOW!
It is YOUR MONEY. Ask! Demand to know!
This is the way that it works:
First the wind impacts the blades. Whether the blades are flat and on a 45 degree angle (as they should be) or if the blades are aerofoil lifting blades (which are proper for an airplane, and NOT for a wind energy device), either way the first calculation is the initial torque on the transfer (or drive, or central) shaft. Without this calculation ALL following input wind energy to output watt energy calculations are irrelevant.
Then when the transfer shaft turns, or even starts turning, there are antirotational forces such as resistance of the bearings, resistance of the seals, resistance due to the viscocity of the oil or grease on the gears, resistance due to the viscocity of the air, etc. All these things can be different when comparing between design shapes of the blades, design of the transfer system, etc. In order to calculate the antirotational forces, the torque force on the blades (whatever the shape of the blades) must be calculated, before or during the energy conversion process. So, the basis for an actual, direct, no room for lying, comparison must be a comparison of the initial torque forces on the blades. Ask. DEMAND to know! We tell you.UP FRONT we tell you. Look at the graph. When you compare, DEMAND to know.
DEMAND that our competitors tell you the initial torque forces on their system from wind at speeds 1 mile per hour to 5 miles per hour.
DO NOT LET THEM CHANGE THE SUBJECT.
IT IS YOUR MONEY!
DEMAND TO KNOW!
Remember this is NOT some "airfoil lifting" wind turbine.
HEY! . . . IT IS YOUR MONEY.
This design uses a lot of big wide blades. We wrote the definition of a Wind Powered Generator as we build them. THERE IS A DIFFERENCE!
( 1 newton meter radian / second = 1 watt )
The above graph shows from 1 to 5 miles per hour.
It gives a direct example of the loss of energy potential in those "wind turbines" at low wind speeds.
Of course you well know that the design of the old farmers' type windmills were
higher efficiency than the "wind turbines" at low wind speeds,
higher efficiency than the "wind turbines" at medium wind speeds,
higher efficiency than the "wind turbines" at high velocity wind speeds.
You know that now. You knew that when you first saw them.
And, we did not have to put up this little graph for you to see, but we thought it might help you to understand the extreme loss that you are paying for from using those "wind turbines" at LOW WIND SPEEDS.
You KNOW that the "wind turbines" turn slowly unless there is almost a hurricane blowing,
and you know that the old time farmers' windmills turned fast at low wind speeds and VERY FAST at high wind speeds. YOU KNEW THIS !
You knew that the "wind turbine" industry has been lying for years and years.
Now we tell you. But you knew it.
When you go to a "wind turbine" company and ask about their wind turbines, ask THEM to look at OUR web page and point blank DEMAND that they compare their low wind speed initial torque forces on their system from wind speeds 1 mile per hour to 5 miles per hour.
They might say, "Uh... Well... Downstream turbulance... Uh... Aerodynamic 'lift'... Everybody... Ummm... Well... Big oil companies pay to put up 'wind turbines' all over the world because... well... uh..." You know they are lying. You know that those "wind turbines" do not work well. You know that the old farmers' windmill design produced HUGE amounts of power for the farmer. You know that. Send them to our web page and watch their faces.
DEMAND TO KNOW. It is YOUR money.
When you use the graph above, and if you calculate using rpm or revolutions per minute, remember that there are 6.283185307 radians in each revolution, and remember that there are 3,600 seconds in each hour. Pay attention to your units.
A newton is a unit of force (1 newton = 0.224808943 pound-force)
A meter is a unit of distance (1 meter = 3.280839895 foot = 1 meter = 39.37007874 inch)
A radian is a unit of rotation (1 radian = 0.159154943 revolution) (or 1 revolution = 2 x pi radians)
(1 revolution/second = 6.283185307 radian/second)
(1 revolution/minute = 6.283185307 radian/minute)
Units! Units! Units! Pay attention to the units! If you are calculating with rpm ("revolution" per minute) and miss that this formula uses "radians" instead of revolutions, then your estimated wattage is more than 6 times higher. When you compare our product to others pay attention to the units that are being used.
REMEMBER to check your units. UNITS ARE VERY VERY VERY IMPORTANT !
1 Newton Meter Radian / Second = 3,600 Newton Meter Radian / hour.
Watt seconds are different from watt hours.
If someone tells you that watt seconds = watt hours then click (here) and check for yourself. Also (here) is a simple NASA example using wattage.
When you compare prices that you pay for electric it is NOT $0.102 (or whatever) per watt.
When you compare prices that you pay for electric it is per KILOWATT HOUR. Pay attention! A kilowatt is 1,000 watts. They are NOT the same. A kilowatt is NOT the same as a kilowatt HOUR! They are NOT the same.
REMEMBER to check your units!
Do not feel bad if you missed some units. Check your units. Do your calculations. Then check your units again. Then write out your calculation's units in full and check them again. It is extremely easy to miss a unit change in a calculation. We are careful.
Oh, we do get much help and much advice. Thanks to everyone that has been helping us toward making our Wind Powered Generators the absolute best in the world.
We show torque in this graph instead of watts! Different alternators (or generators) produce different wattage at the same speed. To calculate the true energy which the blades are converting from the wind, we use initial torque on the transfer (or central, or drive) shaft. After that, gearing may be different, or magnetics of the alternator may be different, or bearing resistance may be different, etc. Torque, created by the blades, on the drive shaft, is our choice for true energy conversion calculations. Do NOT be fooled by wind turbine suppliers reporting wattage estimates alone: ASK them what the torque on the transfer shaft is. If they refuse to tell you, or if they pretend to not know, or they try to engage you in other discussions to evade the issue, then do NOT buy from them. Demand to know their "low speed startup torque from 1 to 5 mph." It is your money. Demand to know.
Remember this is NOT some silly, illogical, waste-of-space, three bladed, airfoil lifting "wind turbine".
Our design (low wind speed startup Wind Powered Generator) uses a lot of big wide blades. THERE IS A DIFFERENCE!
Did we mention designed LOW WIND SPEED STARTUP?
If you are in a low wind speed area, and have a wind turbine and it is not designed for low wind speeds, what is the use of having it?
If you have to put your wind turbine on top of a 1,000 ft tower, to get hurricane winds to simply get it to start producing electric, what is the logic of even having it?
Having even just ONE Wind Powered Generator from reasonablepower.com could be smart.
Designed for LOW WIND SPEED startup.
REMEMBER WE SET THE DEFINITION
Our pictures on this web site are renditions for conceptional purposes only. The "Wind Powered Generator" that you order will definitely not look like that. The design may be similar, but it will be different in blade size, in sweep diameter, maybe in color, etc. This is to show you that you do have a choice: Those three bladed things are not your only option.
Obviously this is NOT some silly, illogical, waste-of-space, aerofoil-lift, wind turbine.
Our page with EMAIL CONTACTS is linked from our "Wind Powered Generator Prices" page.
Yes. You do have permission to use a direct link to this page using this page's title as the anchor text