Trying 2 ideas for Rudderless NYGAD plane

L Edge

Master member
Both @telnar1236 and myself are working on different concepts to design a rudderless plane that needs no gyro or flight controller. My first idea is an offshoot of my X-47B and the second is a radical approach that I put together.

Working from the unknown, why waste time designing a plane. So went to my bone yard, found a dusty F-22 and decided to cut and paste to make a NYGAD model with a single 64mm EDF (5 blades) minus the top shape to see if it works. Edf and shape has been modified from the back up to the spline and when servos and components are on, will shape nose so I can balance it out.

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Side story- Designed "THRUSTERS" so F-22 can hover and not rotate (stops roll by having hollow tubes directly behind EDF blades pick up moving airflow and travel thru tubes and across wing and exits perpendicular to counteract roll) and it worked.(video available). TVN controlled yaw and pitch. By the way, very little thrust was lost with tubes and a carbon rod wing stiffener inside exhaust duct.
Now the back end looks like 6th gen.

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Here is the "sled" where many years ago, I tried a canard approach and it would GLH straight, but failed in the turns. It was a 70mm EDF and being tailless, was moving between 90 and 100mph straight, in a turn, not so.


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First idea is to use my "UDDER RUDDER" concept that didn't exist and install a heli part to act as a rudder which will be controlled by a rudder servo. I will try to fly with rudder and elevator(like a trainer) and then add aileron(?). Next, cut slot in tube and see if udder rudder is within duct, what will happen?


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Then will take rudder off and then do second idea.
 

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L Edge

Master member
Because this is an non-existing experimental aircraft, I don't want to spend time or effort with a full fuse. I use balsa wood epoxied to the


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foam and EDF ducting. To strengthen the wing, used carbon rod. I bought a $13 landing gear(nose wheel steering) and glued the main gear to the foam and carbon rod. That should prevent the main gear going thru foam.
Any plane you build should have the nose pointed a few degrees up so it will shorten your takeoff. So I ended up straightened the nose wheel and used balsa wood(glued) so it will rip loose to reduce damage.


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On top,
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Used a carbon rod down the center of the fuse for strength and installed electronics, 64 mm 5 bladed EDF and decided to use either a 1300 3S or 2200 3S battery .

Again, concept is a movable rudder by servo at the exit(partially out) controlled by my rudder stick (no gyro or FC) that also controls my nose wheel steering. Elevons are being used with the rudder and I'm hoping it will fly it with only using only the elevator and EDF rudder. This is to show how I solved the roll/yaw problem for rudderless NYGAD single EDF jets.

Yesterday was the magic day for me to try my concept. First was the dry runs to determine the proper CG. Finally, got the nose to lift off and drop back to ground when power was dropped. Had control of plane!!!!!!

Now for the biggy. It lifted off, flew straight, quick right blip including rudder, and did a left turn including rudder(didn't want to hit building) and then I quickly went stupid(wanted to fly it back to me), smartly leveled out, cut throttle and glided down. No damage at all.


Need to tune down the control throws and do a couple more ground runs to explore the flight environment before I fly it at a soccer field. Believe I have a winner. What does a single EDF NYGAD plane look like with my silhouette outer frame?
 

L Edge

Master member
@Piotrsko
I will explain drag concept(different version) to you after I finish with above version. Since yaw is a function of exhaust speed and rudder deflection, way to fast for me to handle without gyro I think. So now adding it to rudder as well as elevons and see if it flies. Will then eliminate gyro elevons to try rudder by gyro only. Then rudder control by pilot? Or crash.

Part 2 is where I remove rudder and try drag method where I redo elevons and drag segment one next to the other(outer part of wing) so it deploys one segment up and the other down (each side of wing) that is adjustable with 3 modes.

By the way, did you see what I did with thrust vectoring to get a rudderless XB-47 to fly 9 years ago? Did it with only 2 servos with thrust vectoring hooked to the same servos.

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L Edge

Master member
It is definitely winter and testing is a quick run and then into your vehicle to warm up after in the lower 20"s and low winds. In fact, didn't even take any video since it is added PITA with the bitter cold.

So at home, I added a gyro to the electronics for all three axis to see if it works. Used cellar and applied throttle and tried rudder for a turns. Worked fine. Then went to industrial park and did a quick above ground run and had some small oscillation in roll and applied yaw by a blip. Wow, it agrees with NASA (they did 3 axis vertical testing) and it worked!!!!!
Brought plane back to me using rudder exhaust. Quickly lowered gain in aileron, put new battery in, did a ground run, blip elevator, into air it went, leveled off and then tried blip of left and then right yaw only(gyro did roll and pitch) and land.
So I am going to say, it works, rudder in EDF model works to handle YAW!!!!!
Will have to wait when warmer conditions prevail to see if tail less plane can be handled without gyro or Is "1 axis needed"? for a single EDF situation or what. It looks like this method is one way of solving the NYGAD yaw problem. No pitch is developed with this approach.
 
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Mr Man

Elite member
It is definitely winter and testing is a quick run and then into your vehicle to warm up after in the lower 20"s and low winds. In fact, didn't even take any video since it is added PITA with the bitter cold.

So at home, I added a gyro to the electronics for all three axis to see if it works. Used cellar and applied throttle and tried rudder for a turns. Worked fine. Then went to industrial park and did a quick above ground run and had some small oscillation in roll and applied yaw by a blip. Wow, it agrees with NASA (they did 3 axis vertical testing) and it worked!!!!!
Brought plane back to me using rudder exhaust. Quickly lowered gain in aileron, put new battery in, did a ground run, blip elevator, into air it went, leveled off and then tried blip of left and then right yaw only(gyro did roll and pitch) and land.
So I am going to say, it works, rudder in EDF model works to handle YAW!!!!!
Will have to wait when warmer conditions prevail to see if tail less plane can be handled without gyro or Is "1 axis needed"? for a single EDF situation or what.
Nice to hear!