L Edge
Master member
With larger prop and EDF models, as they increase in size, usually requires a runway. One way to reduce distances is to use a Thrust Vectoring nozzle.
Another method is to use leading edge flaps(LEF) that are automated. Here is an example(watch the left tip, so every time pitch is used, the LEF travel). So, question is, can RC pilots duplicate that and be automated? So watch the left tip of the F-16.
Not having a wind tunnel, can we shorten takeoffs and slow the landings down(also tighten turning radius) to use shorter runways?) being automated.
Looking for things that don't exist, the big question is how can it be done?
So many moons ago, took my testbed (F-22) plane and made many sets of LEF supports ranging for zero to 35 degree deflection. Lots of time testing each angle to see what happened. At 35 degrees deflection, flight is getting unstable so my range was 0-30 degrees. To save time, takeoff lengths were reduced until about 20 degrees, then LEF drag of airflow increased. Automated is designed that LEF is always parallel to airflow where wing angle changes..
12 years ago tried to program(used heli section) and the best I could get is to increase throttle/lower the LEF so at 1/2, is was down 30 degrees. Over 1/2, the LEF jumps to zero. Best you can do with a radio that was old and not enough knowledge about gyros.
So again, this video is shown to explore flight stability and I am yanking and banking in a closed field with 6 -15mph wind. Notice it slides nicely and I am on the hairy edge of disaster(7:12). Now just imagine an runway approach with say a 15 degrees wing angle on a descending slope with controlled throttle. It slows those landings(boring for me) and stops sooner. So it will be up to you to pick your glide slope (by throttle and elevator) to determine your speed for landing. Same for takeoff.
Here again, is where I throw it to launch and quickly yank and bank right to set up spot landings.. Could you ever do that with a F-22 without leading edges in that short distance?
Finally, a demo with a thrust vectoring nozzle if you don't want LEF's. To me, it is the same as LEF's. Since your thrust vector has an upward(lift component) value, it will slow your t/o and landings.
Tomorrow, I will explain the layout out of my F-22 on how to set up LEF's so that it will be off, flip a switch so then it reacts to pitch changes(separate from your flying elevator control) and only go from zero LEF to what ever degree your plane needs to shorten takeoffs and landings.
Another method is to use leading edge flaps(LEF) that are automated. Here is an example(watch the left tip, so every time pitch is used, the LEF travel). So, question is, can RC pilots duplicate that and be automated? So watch the left tip of the F-16.
Not having a wind tunnel, can we shorten takeoffs and slow the landings down(also tighten turning radius) to use shorter runways?) being automated.
Looking for things that don't exist, the big question is how can it be done?
So many moons ago, took my testbed (F-22) plane and made many sets of LEF supports ranging for zero to 35 degree deflection. Lots of time testing each angle to see what happened. At 35 degrees deflection, flight is getting unstable so my range was 0-30 degrees. To save time, takeoff lengths were reduced until about 20 degrees, then LEF drag of airflow increased. Automated is designed that LEF is always parallel to airflow where wing angle changes..
12 years ago tried to program(used heli section) and the best I could get is to increase throttle/lower the LEF so at 1/2, is was down 30 degrees. Over 1/2, the LEF jumps to zero. Best you can do with a radio that was old and not enough knowledge about gyros.
So again, this video is shown to explore flight stability and I am yanking and banking in a closed field with 6 -15mph wind. Notice it slides nicely and I am on the hairy edge of disaster(7:12). Now just imagine an runway approach with say a 15 degrees wing angle on a descending slope with controlled throttle. It slows those landings(boring for me) and stops sooner. So it will be up to you to pick your glide slope (by throttle and elevator) to determine your speed for landing. Same for takeoff.
Here again, is where I throw it to launch and quickly yank and bank right to set up spot landings.. Could you ever do that with a F-22 without leading edges in that short distance?
Finally, a demo with a thrust vectoring nozzle if you don't want LEF's. To me, it is the same as LEF's. Since your thrust vector has an upward(lift component) value, it will slow your t/o and landings.
Tomorrow, I will explain the layout out of my F-22 on how to set up LEF's so that it will be off, flip a switch so then it reacts to pitch changes(separate from your flying elevator control) and only go from zero LEF to what ever degree your plane needs to shorten takeoffs and landings.
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