Documents filed under Safety

Ice throw and setback distances

Ice_throw-rutgers_thumb This short paper prepared by Professor Terry Matilsky, Department of Physics and Astronomy at Rutgers University, explains how ice or other debris flung from a turbine blade can travel significant distances.
2 Mar 2011

NTSB report: Airplane collision with met tower

Ntsb_report_thumb On January 10, 2011, at 1057 Pacific standard time, a Rockwell International S-2R, impacted a meteorological tower (met tower) during an aerial application on Webb Tract Island, Oakley, California. The airplane sustained substantial damage and the pilot was killed. The met tower was erected for the purposes of planning a wind energy facility. The preliminary NTSB report can accessed at the link(s) below.
19 Jan 2011

Modeling the effects of wind turbines on radar returns

Windturbineeffectsonradarreturns_thumb This paper explains how wind turbines located near radar installations can significantly interfere with a radar’s ability to detect its intended targets. The authors explain software tools capable of calculating the radar cross section of electrically large objects. In this paper, interference from wind turbines is predicted using XGtd simulations and new post-processing algorithms that calculate Doppler shift quantities based on points of interaction with the rotating turbine blades.
6 Dec 2010

Vestas OSHA violations

Vestas_osha_violations_thumb This document details OSHA violations at the Vestas blade manufacturing facility in Windsor, Colorado. Safety and workplace violations are not unique to this site. Vestas was also cited for workplace violations at overseas factories. These violations date back to April and May, 2010.
20 Oct 2010

FAA testimony before the House Armed Services Committee on the impact of wind farms on military readiness

Kalinowski_testimony062910_thumb Statement of Nancy Kalinowski, Vice President for System Operations Services, Air Traffic Organization of the FAA delivered this testimony before the House Armed Services Committee, Subcommittee on Readiness on the Impact of Wind Farms on Military Readiness. An excerpt of Ms. Kalinowski's testimony shown below explains the problem produced when the moving turbines interfere with radar. Her complete testimony can be accessed by clicking on the links at the bottom of the page.
29 Jun 2010

U.S. General Victor E. Renuart testifies on radar interference fron wind turbines

031810renuart_thumb General Victor E. Renuart, Jr. USAF Commander of the United States Northern Command and North American Aerospace Defense Command delivered this testimony to the U.S. House Armed Services Committee. The below excerpt includes General Renuart's concerns with radar interference from wind farm development. His full testimony can be accessed by clicking on the link at the bottom of this page.
18 Mar 2010

Modern wind turbines generate dangerously "Dirty" electricity

Wind turbines are causing serious health problems. These health problems are often associated, by the people having them, with the flicker and the noise from the wind turbines. This often leads to reports being discounted. Residents of the area around the Ripley Wind Farm in Ontario where Enercon E82 wind turbines are installed feel that the turbines are making them ill.
28 Apr 2009

Breakdown risks in wind energy turbines

Breakdownrisksinwindmillsfinal_thumb Wind mills are the cheap and efficient generator of electricity. While the wind mills are patronized in India by the big corporate houses and medium scale industries for various reasons including the tax benefits offered by government these units are subject to fire, lightning and break down losses. This article highlights the possible break down failures of wind mills and suggests some key recommendations.
1 Apr 2009

Final report on investigation of a catastrophic turbine failures, February 22 and 23, 2008

Endelig_redeg%c3%b8relse_for_haveriforl%c3%b8b_ved_halling_og_sidinge2_thumb Following the catastrophic failure of two Vestas wind turbines on Feb 22 and 23, 2008, the Danish energy agency requested an investigation into the events. A report was produced by engineers at Risø DTU. Below is the report translated into English. The original report, in Danish, can be accessed by clicking on the link below. A video of one of the failures can be seen here: . It is important to note that the debris from the first turbine failure which occurred on February 22 spread as far as 700 meters (2200 feet) away. Risø DTU is formerly a government research institution under the Danish Ministry of Science, Technology and Innovation.
1 Dec 2008

Flight for Life policy on flying near windfarms

Flightforlifeflyer_thumb Flight for Life issued a notice to local law enforcement agencies and fire departments in Wisconsin advising them that they will not transfer patients from areas where wind turbines are located. The wording on the notice is below. A copy of the notice can be downloaded by clicking on the link below.
14 Aug 2008

Ice shedding from turbines and public (e-mail)

Zimmerman_ice_throw_email_1-20-2000_thumb Here is a reprint of an email about ice throw at Green Mountain Power's Searsburg wind energy facility in Searsburg Vermont. The email was written by John Zimmerman to an American Wind Energy Association listserv in 2000. Mr. Zimmerman managed the development of the Searsburg facility
9 Mar 2008
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