fly_tornado 2,991 #1 Posted August 21 this is different https://www.ainonline.com/aviation-news/general-aviation/2019-07-23/inventor-promotes-estol 1 2 Quote Share this post Link to post Share on other sites
Old Koreelah 3,250 #2 Posted August 21 The Custer channel wing showed how much lift can be improved by speeding up the airflow over the top. Quote Share this post Link to post Share on other sites
facthunter 12,959 #3 Posted August 21 Blown wings work OK Blown sheep are another Matter. Nev Quote Share this post Link to post Share on other sites
Bruce Tuncks 1,413 #4 Posted August 22 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. 1 Quote Share this post Link to post Share on other sites
Bruce Tuncks 1,413 #5 Posted August 22 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. Quote Share this post Link to post Share on other sites
facthunter 12,959 #6 Posted August 22 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 Quote Share this post Link to post Share on other sites
Bruce Tuncks 1,413 #7 Posted August 22 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. Quote Share this post Link to post Share on other sites
jetjr 1,832 #8 Posted August 22 Wasnt it indicated that the kw used was to get the thing airbourne ie 50 kw per take off? Quote Share this post Link to post Share on other sites
Bruce Tuncks 1,413 #9 Posted August 22 That's just the point jetjr.... how long in time is the 50 kW needed? This certainly would determine the batteries needed. Quote Share this post Link to post Share on other sites
facthunter 12,959 #10 Posted August 22 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 Quote Share this post Link to post Share on other sites
jetjr 1,832 #11 Posted August 23 Different times for different flight methods, its a measure of energy used Quote Share this post Link to post Share on other sites
