AeroTesla1 Posted November 12, 2017 Share Posted November 12, 2017 Since the Cozy does not have flaps to help with slower landing speeds, short or soft field landings, are speed brakes out of the question? Would it be that hard to add flaps, without destroying the intgrity of the design? Thank you! Quote Link to comment Share on other sites More sharing options...
Marc Zeitlin Posted November 13, 2017 Share Posted November 13, 2017 Since the Cozy does not have flaps to help with slower landing speeds, short or soft field landings, are speed brakes out of the question? What is it you thing "speed brakes" are, and what do you think they do? Would it be that hard to add flaps, without destroying the intgrity of the design? Thank you! It would be harder than "that hard" to add flaps - see the Beech Starship, and what they had to do to add flaps to the canard configuration. Quote Marc J. Zeitlin Burnside Aerospace marc_zeitlin@alum.mit.edu www.cozybuilders.org copyright © 2024 Link to comment Share on other sites More sharing options...
AeroTesla1 Posted November 13, 2017 Author Share Posted November 13, 2017 I now realize it has a speed brake. I flew Gliders, very familiar with their funtion, thanks!???? Quote Link to comment Share on other sites More sharing options...
AeroTesla1 Posted November 13, 2017 Author Share Posted November 13, 2017 (edited) What is it you thing "speed brakes" are, and what do you think they do? It would be harder than "that hard" to add flaps - see the Beech Starship, and what they had to do to add flaps to the canard configuration. I really think the ability to direct the thrust from the ducted fans, could be a huge help in compensating for the lack of flaps. As previously mentioned, just need to run the program and see. Worth the time and effort in my very humble opinion. Nothing complex. Adjusting the ducted fan's thrust, would work just like a flap bar, as found on older Cessnas and Piper A/C. I will let you know what the model results say, if you would like.?. Thanks again, Al. Edited November 13, 2017 by AeroTesla1 Quote Link to comment Share on other sites More sharing options...
AeroTesla1 Posted November 13, 2017 Author Share Posted November 13, 2017 p.s. I am very new to this line of A/C, but learning as much as I can, as I go. Quote Link to comment Share on other sites More sharing options...
AeroTesla1 Posted November 13, 2017 Author Share Posted November 13, 2017 I now realize she has a speed brake. Learning as I go, about an A/C, I have come to admire in a unspeakable manner. Quote Link to comment Share on other sites More sharing options...
Kent Ashton Posted November 13, 2017 Share Posted November 13, 2017 I now realize she has a speed brake. Learning as I go, about an A/C, I have come to admire in a unspeakable manner. It is not really a "speed" brake, it's actually a landing brake. It can only be deployed at low speed. The purpose is to deploy it on final approach to reduce the tendency of these slick airplanes to float in ground effect. Quote -KentCozy IV N13AM-750 hrs, Long-EZ-85 hrs and sold Link to comment Share on other sites More sharing options...
Marc Zeitlin Posted November 13, 2017 Share Posted November 13, 2017 I now realize it has a speed brake. I flew Gliders, very familiar with their funtion, thanks! If you believe that speed brakes somehow lower landing speeds, then I'd disagree that you understand their capabilities or how they work. The Landing Brake in a canard aircraft is purely a drag device - it does not either increase the lift coefficient of the wing nor decrease the lift generation, as speed brakes do. It does not affect the landing speed at all - it only adds drag to decrease the glide ratio of the aircraft. Speed brakes do the same thing by killing lift. The LB increases the "D" in L/D, while speed brakes decrease the "L" in L/D. Neither increases Cl or A, which are the only way to decrease landing speeds. Quote Marc J. Zeitlin Burnside Aerospace marc_zeitlin@alum.mit.edu www.cozybuilders.org copyright © 2024 Link to comment Share on other sites More sharing options...
AeroTesla1 Posted November 13, 2017 Author Share Posted November 13, 2017 Thank you for clarifyling the difference, as I had always considered and device (other than flaps), that cause drag, to be a "speed brake". Happy Flying, Al. Quote Link to comment Share on other sites More sharing options...
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