<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><a href="http://esmats.eu/esmatspapers/pastpapers/pdfs/2017/bialke.pdf">http://esmats.eu/esmatspapers/pastpapers/pdfs/2017/bialke.pdf</a><div><br></div><div>One explanation though would be hard to confirm unless and until some of these spacecraft might be recovered.... Or might it be possible to put a platform with metal reaction wheels on a loopy orbit, wait for a few solar even to occur, then recover it (when it loops back in) and examine the bearings?<br><br><div id="AppleMailSignature"><div style="line-height: normal;"><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);">Regards,</span></div><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);"><br></span></div><div><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);">Dan</span></div><div style="line-height: normal;"><span style="line-height: 20px; background-color: rgba(255, 255, 255, 0);"> Sample my Kindle books at:</span></div><div style="line-height: normal;"><p style="margin: 0px; font-stretch: normal; font-size: 12px; line-height: normal; font-family: Helvetica;"><span style="font-size: 12pt;"><a href="http://author.to/DanUst">http://author.to/DanUst</a></span></p></div></div></div><div><div style="line-height: normal;"></div></div></div></div></body></html>