By far the most challenging design project i've attempted. The B2 cannot be designed like a traditional flying wing and made to "look" like a B2. it can only be a B2! this allows for very little wiggle room to make it fly well in RC scale. I'm happy to offer this beautiful model to everyone. Its fun to build, fun to fly and the silhouette against the sky is unmistakable!
The B2 also comes with a fun GBU-57 you can print and figure out a fun way to drop. The GBU57 prints easily and you can print it in LW PLA.
The B2 is 100% hand launchable if you're a seasoned hand launcher. I've designed large sturdy hand holes for you to grip and throw. Id always recommend attaching some fixed gear to the bottom or finding somone else to throw it for you. It must be thrown straight and fairly level on the throw.
Flight Videos
Maiden https://youtu.be/3oLHZasshAY?si=jJ0bSnG2HxbYAHPi
More https://youtu.be/oxeHwVM6fM0?si=1w_RVxVWta7v8mgy
Tailless flighthttps://youtu.be/msKgtmaVOlc?si=Rx2sLKQd9tsE63ZX
Drag Rudder assembly https://youtu.be/zHVrpyrwuSI?si=lqQkzWmTqkUn4HNm
Full build video coming tomorrow
There are three ways to fly this B2.
1. Fly it with zero gyro stabilization. Vertial Tail highly recommended. I was able to fly it fine this way, youll need to manually use the drag rudders to keep it straight.
2. Fly it will a gyro on the elevons and you manually control the drag flaps for yaw. NO TAIL. this is my preferred method. Its very satisfying to fly like this. You get the tailless look and feel with great flight performance.
3. You can use your own flight controller to setup dual drag rudders on the yaw and have the controller also control pitch and roll. (best option if you are handy with flight controllers.
Pre flight trim! Elevons need to have down trim to counter the pitch up moment of the airframe. This isn’t as important if you’re using a flight controller. If you’re not using a flight controller, use 4mm down offset from neutral (pitch nose down). Also error on nose heavy for your maiden. Front of the bumps
Parts Required
-fans (CCW and CW highly recommended but not necessary)https://a.co/d/cOjKngi
https://a.co/d/0aq0oDp. I personally used the 5000kv 3s units, you can use the 4600 4s with great results. Your preference.
-ESC's 2x https://a.co/d/dAYbdvF
-4x 9g servos https://a.co/d/aixfS6X
-2x 4.3g servos for drag rudders https://a.co/d/igN1xK1
2x 8mm carbon tubes for the wings https://a.co/d/fHqF3QK
-These batteries for a 3s setup https://a.co/d/1t5alrT must be at least 279g to balance the plane.
-Pushrod https://a.co/d/0SOe6dQ
-Velcro for battery and other components.
-Medium CA glue for plane assembly (i use starbond)
-Hot glue for attaching the motors and EDF covers and servos in place
-Y adapter for the ESC motor wires
-2x Y adapters for the dual elevons on each wing
-Long servo extensions for the servos (at least 6)
Aircraft Specifications
- EDF: twin 50mm
- Servos: 4
- Skill Level: Advanced