Here is a CAP1391 SkyEcho 2 mounted on the side window in a RAF Sport Aircraft PA-28. More than sufficient for the purposes it was designed for and a pretty even pattern having flown a lot in recent weeks (it seems the more you fly, the more the gaps get filled in the polar diagram as expected):
By the way, all RAF Sport Aircraft’s clubs will soon have SkyEcho 2 to use, having recently bought a large consignment for their member’s use. I believe that the RAF Gliding & Soaring Assoc are doing the same.
I even saw a paraglider at the Malverns last weekend using a SkyEcho. Highly unlikely I would have spotted them at the range that my SkyEcho first detected them (about 15 miles away), and when I did see them with my eyes at about 2 miles distance it was quite a surprise. I’ve been using the bluetooth connectivity to my iPad running SkyDemon connected to a cheap bone conducting headset (£9.99 on eBay) - it works a treat. Even though the iPad is now sticky velcro’d to the instrument panel, I very rarely need to look at it.