... and they are quite common around here. They are a very confusing airplane when seen at a distance. With no empennage, it is almost impossible to tell if it is coming or going. In addition they must have some sort of noise abatement system because I have had them fly right over my house at somewhere around 5,000 feet and never heard a sound and at other times they sounded pretty loud. Great airplane, but like so many of our other aircraft they are about worn out.