As a professional engineer with a long and continuous involvement with the research and development of radar components and systems for both civil and military applications, I find your news item mystifying (Livelihoods at risk as Westminster sues SNP over family-run wind farm, News, October 4). The known science actually reaffirms that there is no fundamental physical constraint that prohibits the accurate detection of aircraft around wind farms.

It is well known that wind farm turbines can interfere with radar signals causing "clutter" on display screens. However, since turbine locations are fixed and since blades rotate within strictly limited speed ranges, this clutter is not unpredictable and can be accommodated by modern radars, through adjustments to signal processing software. Where this is not possible with older established radar installations, stealth technology, as used on modern military aircraft and battleships, can be applied to the wind turbines to reduce their "radar signatures". The technology has been successfully applied to trial structures. Potentially, it should attract minimal extra cost to the turbine manufacturer.

That the MOD has contested the construction of wind turbines in the line of sight of radar, thus stalling development of several thousands of megawatts of wind energy, is perverse and unnecessary from a purely technological perspective. Unfortunately, a large number of such denials has represented a significant impediment to addressing the arguably more serious issue of climate change and to the nation’s mandated requirement to grow our use of sustainable energy.

Alan J Sangster

Edinburgh

Tom Gordon's article raises important issues (Westminster bid to scupper Scottish renewable project could bankrupt family business, News, October 4). Not least the shameful use by the SNP Government of our farming fraternity to support their own political aims. The hill farmer concerned is right to rail against being urged to diversify into renewables without full disclosure of existing dis-benefits and risks.

There are two aspects that are irrefutable. One is the immense empathy felt for this particular family’s plight, but the other is that no renewable energy technology must be permitted to compromise passenger and air crew safety. With this in mind, it appears crucial that the MOD win this case in order to protect all those potentially affected. Also that the Civil Aviation Authority answers the Freedom of Information questions they now have before them on the subject of wind turbines and air traffic safety.

Christine Metcalfe

Loch Avich, Taynuilt