JabirWatt eSTOL

[fly_tornado]

this is different

 

 

https://www.ainonline.com/aviation-news/general-aviation/2019-07-23/inventor-promotes-estol

 

 

[Old Koreelah]

The Custer channel wing showed how much lift can be improved by speeding up the airflow over the top.

 

 

[facthunter]

Blown wings work OK Blown sheep are another Matter. Nev

 

 

[Bruce Tuncks]

He thinks the reader doesn't understand power and energy. 50kW is a rate of energy consumption.  It tells you nothing about how much energy you need.  Like saying how you live only 50 km/hr from the city.

 

But the Jabiru is interesting...  I wonder about the placing of the ducted fans , they look to be too few and not spaced properly.

 

And I would think that a "blown" wing would be quite a specialized airfoil with a built-in duct system.  I imagine a pipe inside the leading edge with a slot at about 5% chord blowing air back over the upper surface.

 

Thanks for the info Turbs.

 

 

[Bruce Tuncks]

There is a good story " NASA remakes the airplane wing with a whole lot of propellers". They are modifying a Technam to a blown wing with 12 electric motors on the leading edge.  

 

 

[facthunter]

50 Kw is a quantum of energy. 50 Km is a quantum of distance. The rate would still need a "time" element ie /Hr  /day .etc in both instances.

 

  Wing mounted  propeller engines have always blown wings as the centre engine blows the tailfeathers,,making them more effective. at lower speeds..Nev

 

 

[Bruce Tuncks]

Exactly right Nev. A kWh is 3,600kJ of energy. A kW can be any amount depending on the time.

 

I never thought of the DC3 as having a blown wing but it really has. And more so for the DC4.

 

 

[jetjr]

Wasnt it indicated that the kw used was to get the thing airbourne

 

ie 50 kw per take off?

 

 

[Bruce Tuncks]

That's just the point jetjr....  how long in time is the 50 kW needed? This certainly would determine the batteries needed.

 

 

[facthunter]

 A certain amount of thrust (force) will get you flying ie overcome drag. Work is done when the force applies over a distance. W  = F x s .Nev

 

 

[jetjr]

Different times for different flight methods, its a measure of energy used