***  Question:  *** In various sources of the information upon windenergetic
is spoken about theoretically greatest possible factor of transformation
of the wind power, equal 59,3 %. In your article you specify number 68,6 of %, whence it and where to this a substantiation?

The answer: Value of 59,3 % is result of the theory of wind engines
which had offered A. Betz in the twentieth years of the last century. Basic conclusions of this theory are used till now. However, the Soviet scientist – professor G.Sabinin (the pupil of professor N.Zhukovsky) in 1931 had offered more exact theory in which had proved presence of so-called «the attached mass». This theory increases the mentioned above value up to 68,6 %. I managed
to adapt the theory and formulas of G.Sabinin for modern opportunities.
I offer the calculations corresponding to his more exact theory. For those
who wants to find the primary source: G.Sabinin, “The theory and aerodynamic calculation of wind engines”, collection BCHX the USSR “Works of scientific research institutes of the industry” № 482, the Central Aero-Hydrodynamical Institute, Release 104. Theme – the Problem of use of a wind power. The state scientific and technical publishing house, Moscow, Leningrad, 1931, 70 pages.
In the original in Russian (code: windows-1251):
* Г. Х. Сабинин, «Теория и аэродинамический расчёт ветряных двигателей», сборник ВСНХ СССР «Труды научно-исследовательских институтов промышленности » № 482, Центральный Аэро-Гидродинамический Институт (ЦАГИ), Выпуск 104. Тема – Проблема использования энергии ветра. Государственное научно-техническое издательство, Москва, Ленинград, 1931, 70 страниц. *

***  Question:  *** In the aerodynamic calculations suggested by you there
is a parameter "A". What does it mean and whence the formula of calculation
of parameter "e" is taken?

The answer: The parameter "A" is auxiliary. It groups all combinations of use
of parameter "e" in the formula b = f (Cy, Cx, Zu, e, i, r), where
b – width of an element of the blade; Cy, Cx, Zu, e – aerodynamic parameters;
i – quantity of blades; r - distance of an element of the blade from the center.
In calculations it is more convenient to find A = f (Cy, Cx, Zu, i, b, r),
and then to find е = f (А). The equation А = е/(1+е)/(1-е)² will be transformed
in е³ – е² – (1 + 1/А)е + 1 = 0 and is solved with use of the formula Cardano
(it is specified in mathematical directories). Result of the decision is the formula
in cells "e" in calculations applied to article.

***  Question:  *** I live in district with the big wind activity and I plan
to mount own small wind turbine. Whether I can take advantage of your calculations for definition of its efficiency?

The answer: Yes. For this purpose it is necessary for you to learn (for example, on the nearest meteorological station) the wind characteristic of your district (mid-annual wind speed and parameter Weibull K), and also parameters
of concrete wind turbine to substitute them in the calculation table and to count up annual gathering of the received energy. Accuracy of calculation depends
on conformity entrance data to real values. Knowing cost of wind turbine and term of its service it is possible to count up cost of each received watt. After these calculations it is possible to argue about efficiency of your wind turbine.
At experiments with Excel table remember, at some your actions, option of cyclic references of Excel table can be changed. For reconstruction of this option
it is necessary to open the table, to press "service" in a line of the menu,
then to find and press "parameters", to find and press "calculations".
In this window switch on "iterations", fill values "limiting number of iterations" 100 and accuracy – 0,000001.

***  Question:  *** Whether company Izosimov Windrotor of the sponsor has?

The answer: Izosimov Windrotor (windrotor.info) company is independent of external programs, has no external financing and carries out researches, calculations, patenting, licensing and other activity for own money. We can interest potential sponsors or their advertising on this website, or preferential licensing of idea offered on a website (after reception of the patent). Other variants are possible also.

***  Question:  *** Whether the partner program with other websites interests
the author of your website?

The answer: Yes. I would like that on other websites which represented windenergetic and on websites which represented nonconventional and renewed energy sources there were references to this website. It can be references
on pages of "links" and/or in messages (it is desirable with the resume) on pages of news. In exchange I could add references about these websites on the own page "links", and probably to place banners. The page of news on this website
is not planned.

At occurrence of questions and offers please address through contact page of a website.

© 2008 Izosimov Evgeny
Best Innovation in Windenergetic
www.windrotor.info