The Katonka Turbine is a 280+ kph, 1.5m wingspan, 5.5kg wet (5kg dry), turbine powered derivative of Doug Kaye's (DHK79) original Katonka_EA.
A derated KJ66 turbine, producing just 30N of thrust, powers the model in an impressive manner, and the 560cc fuel tank allows just over 7 mins of flat-out flying.
In this variant, the fuselage and wings have been beefed-up to handle the higher stresses and strains associated with a heavier model flying faster than the original design catered for.
Spoilers cum speed-brakes have been added to help slow this slippery ship (but, unfortunately, they do not show on the graphical representation - I don't know how to do that).
All turbines produce some thrust at idle, and the low drag design of the Katonka and Katonka a Turbine means that the model will still fly even with the throttle closed right down to idle. The propeller powered Katonka doesn't suffer this problem because the propeller 'discs' present significant drag.
The spoilers cum speed-brakes are extended when the throttle is fully closed, and retracted again as soon as the throttle is cracked open a little (Spoilers on Throttle (SoT)). Wheel brakes have been added and they can be applied by pushing on the stick, i.e. giving 'down' elevator.
Some 'elevator boost' has alsobeen added to helpreduce the stick loads when the gear is down ready to land.
All the other controls are standard.
Many thanks to Doug Kaye (DHK79) and George Miller (Katonka) for producing such a refined original model and publishing it for us all to enjoy - we all really appreciate your efforts. Keep up the excellent work guys.
Nigel_B
Background to the Katona:
The Katonka is the namesake of George Miller (AKA Katonka) who was building a custom sport plane loosely based on the Bugatti R-100 (which Doug Kaye (DHK79) modeled for RealFlight back in 2007). Since Doug Kaye had already modeled the Bugatti, George asked him if he would prototype his original design in RealFlight. This would allow George to test out control throws, center of gravity, and various other aspects of the flight physics thereby minimizing the potential danger of taking an untested design aloft for the first time. The finished RealFlight model also allowed George to easily preview potential trim schemes without the use of either paint or monocote.
George provided the 3-view and design concept, Doug did the 3D model and the initial physics. George then did the colorscheme and the two of them tweaked the physics.
Doug and George concluded that RealFlight was a tremendous aid to the development of a unique RC aircraft.
A derated KJ66 turbine, producing just 30N of thrust, powers the model in an impressive manner, and the 560cc fuel tank allows just over 7 mins of flat-out flying.
In this variant, the fuselage and wings have been beefed-up to handle the higher stresses and strains associated with a heavier model flying faster than the original design catered for.
Spoilers cum speed-brakes have been added to help slow this slippery ship (but, unfortunately, they do not show on the graphical representation - I don't know how to do that).
All turbines produce some thrust at idle, and the low drag design of the Katonka and Katonka a Turbine means that the model will still fly even with the throttle closed right down to idle. The propeller powered Katonka doesn't suffer this problem because the propeller 'discs' present significant drag.
The spoilers cum speed-brakes are extended when the throttle is fully closed, and retracted again as soon as the throttle is cracked open a little (Spoilers on Throttle (SoT)). Wheel brakes have been added and they can be applied by pushing on the stick, i.e. giving 'down' elevator.
Some 'elevator boost' has alsobeen added to helpreduce the stick loads when the gear is down ready to land.
All the other controls are standard.
Many thanks to Doug Kaye (DHK79) and George Miller (Katonka) for producing such a refined original model and publishing it for us all to enjoy - we all really appreciate your efforts. Keep up the excellent work guys.
Nigel_B
Background to the Katona:
The Katonka is the namesake of George Miller (AKA Katonka) who was building a custom sport plane loosely based on the Bugatti R-100 (which Doug Kaye (DHK79) modeled for RealFlight back in 2007). Since Doug Kaye had already modeled the Bugatti, George asked him if he would prototype his original design in RealFlight. This would allow George to test out control throws, center of gravity, and various other aspects of the flight physics thereby minimizing the potential danger of taking an untested design aloft for the first time. The finished RealFlight model also allowed George to easily preview potential trim schemes without the use of either paint or monocote.
George provided the 3-view and design concept, Doug did the 3D model and the initial physics. George then did the colorscheme and the two of them tweaked the physics.
Doug and George concluded that RealFlight was a tremendous aid to the development of a unique RC aircraft.
