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NASA Prandtl-D Project - Yaw is propulsive, not drag --- Has Anyone Followed This?

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CobraCar11

Active Member
Joined
Jan 28, 2016
Messages
34
Location
Pleasant Grove, UT, USA
NASA research is making it possible so that YAW can be a propulsive force!!!

I saw a news report video "thing" from "The Aero News Network" that was discussing the Prandtl-D project from NASA. In it, they discuss the "minimum induced drag for a wing" that was solved by Prandtl in 1920, but noone talks about his follow up solution in 1933 which was more complete.

Here is the link:
https://www.youtube.com/watch?v=0Oh0Q0Dv28I
The main part of this discussion is at around 3:40, but the lead up to the topic starts at the beginning.

Some of the interesting things they mentioned is that the tail is 30% of drag, and some analysis around the winglets.

I have a technical background, but I did not quite understand the mechanics of what happens at the winglets that can be used to make yaw a propulsive force. Has anyone else been following this? Can anyone explain it better for the forum? It sounds like an incredible concept, but I can't quite wrap my head around it.

How great would it be to eliminate all that drag and inefficiency? It sounds like aircraft handling and performance would improve significantly. Could this eliminate adverse yaw effects?

Can anyone explain this in a way that the forums can understand this concept? Many thanks.

Safe Flying!
 
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