Re: Others use ...
Fur ?
Considered in the 1970s IRCC. Like owl feathers at reducing surface vortices. Cant recall magazine, probably not Flight but more research. It was only about 50 years ago
Fur ?
Considered in the 1970s IRCC. Like owl feathers at reducing surface vortices. Cant recall magazine, probably not Flight but more research. It was only about 50 years ago