When does a prop become fan? The Optica had 5 blades. My Ductfan park flyer will be 36" span
and weigh no more than 12oz
. It is intended to explore the feasibility of the power system and
layout. I have got this far. Attachment 140939
The ailerons will be cut out and the servos,
radio and motor added before the top skin goes on.[/QUOTE]
The depth of the root from leading to trailing edge and helix are what I'd consider the point where
a prop and fan blade are differentiated.
I am curious how you plan to construct this and have it weigh no more than 12 ounces when lipo
is going to rapidly accumulate mass without so much as an airframe and onboard systems.
No intention to boo-hoo...simply pointing our sustained flight is what we all look in these things,
not a simple loft across an indoor basket ball court.