Odd Propeller Concept in Unusual Airplane

[hesham]

Hi,

Mr. Kenneth A. Browne,Mr. Willard B. Goodman and Mr. Donald J. Lowman designed
a new odd propeller concept and intended to use in unusual airplane powered by two
engines mounted at the rear wing,assigned to Reed Propeller Co. Inc.,page 59;

https://books.google.com.eg/books?id=kgEhBrutxwEC&printsec=frontcover&hl=ar&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false

https://www.google.com/patents/US2067595?dq=us+2067595+aircraft&hl=ar&sa=X&ved=0ahUKEwjiqNi26OHLAhXJ2BoKHWLZC-cQ6wEIHTAA

 

[Abraham Gubler]

Improve propeller efficency at a huge cost in weight and drag. Net result... no build.

 

[Avimimus]

Interesting. Would a screw type propeller really have higher efficiency? I always assumed they were a result of people not understanding how airfoils work.

 

[Hobbes]

Unusual, yes. New? That design goes back to Leonardo da Vinci...