phacious
New member
X-wing, X-plane, X-factor, X marks the spot. These are a few of the names that people started calling my little contraption at FFE17. As for me, I've named it the (phacious) PhunX, and it is the most fun RC plane "I" have ever flown. Let me show you its features .
The PhunX is a pair of forward-swept and swept-back wings. The forward-swept wing is considered the main wing, having a thicker airfoil. The fuselage holds the guts and rear wing fins provide yaw stability. The controls are as unique as the wings. The forward wing has ailerons and the read wing has elevons. Best of all, the motor is on a swivel mount which gives aggressive yaw control. The guts consist of a Turnigy 2826-6 2200kv with a 7x3.8SF, 40A HK ESC and a 2200mah 3S lipo resulting in +2.25 lbs of thrust. Servos are 4x MS90 12g metal gear servos.
Version 1 as depicted above, has positive dihedral in front and the rear has negative dihedral. Version 2 (XL seen below) has no dihedral at all. Flight wise, version 1 is very maneuverable, aileron rolls with next to no nose drop, and flies hand's free inverted. Version 2 is slower, gentler, point and go, and hates inverted. I'm not sure what difference the dihedral is making between the two. I'm experimenting with different configurations before I post an actual plan, but the following build video will give you a pretty solid idea.
This idea resulted from me trying to dream up a plane with a unique silhouette that would be easy to find in a sky full of planes, AKA FliteFest Combat. One day I thought, "Can I make an X fly?" The thrust vectoring was inherited from a multi-use fuselage with that capability I built the week before. I spit-balled the CG for maiden and wasn't too far off. If you treat the rear wing like an oversized horizontal stabililzer, figuring the CG becomes easier.
Overall, I put is plane in the "You have to try this!" category and I want to post build plans when its a bit more refined. I'd love to hear any suggestions on how to improve the design! To that end, here are a few issues I'd like help to iron out.
-Both versions fish tail a little coming out of turns, nothing bad but it'd be nice to get rid of it.
-version 1 has a hockey stick for a down elevator curve, may be due to the kfm-1 foil on the rear wing.
-version 1 flies better upside down, which is awesome and confusing at the same time, something something dihedral?
-Am I overbuilding the front wing for lift? version 1 = 3/8" spare, version 2 =3/16" spare. Both tend to want to high-Alpha without extensive down trim or CG shift forward.
The PhunX is a pair of forward-swept and swept-back wings. The forward-swept wing is considered the main wing, having a thicker airfoil. The fuselage holds the guts and rear wing fins provide yaw stability. The controls are as unique as the wings. The forward wing has ailerons and the read wing has elevons. Best of all, the motor is on a swivel mount which gives aggressive yaw control. The guts consist of a Turnigy 2826-6 2200kv with a 7x3.8SF, 40A HK ESC and a 2200mah 3S lipo resulting in +2.25 lbs of thrust. Servos are 4x MS90 12g metal gear servos.
Version 1 as depicted above, has positive dihedral in front and the rear has negative dihedral. Version 2 (XL seen below) has no dihedral at all. Flight wise, version 1 is very maneuverable, aileron rolls with next to no nose drop, and flies hand's free inverted. Version 2 is slower, gentler, point and go, and hates inverted. I'm not sure what difference the dihedral is making between the two. I'm experimenting with different configurations before I post an actual plan, but the following build video will give you a pretty solid idea.
This idea resulted from me trying to dream up a plane with a unique silhouette that would be easy to find in a sky full of planes, AKA FliteFest Combat. One day I thought, "Can I make an X fly?" The thrust vectoring was inherited from a multi-use fuselage with that capability I built the week before. I spit-balled the CG for maiden and wasn't too far off. If you treat the rear wing like an oversized horizontal stabililzer, figuring the CG becomes easier.
Overall, I put is plane in the "You have to try this!" category and I want to post build plans when its a bit more refined. I'd love to hear any suggestions on how to improve the design! To that end, here are a few issues I'd like help to iron out.
-Both versions fish tail a little coming out of turns, nothing bad but it'd be nice to get rid of it.
-version 1 has a hockey stick for a down elevator curve, may be due to the kfm-1 foil on the rear wing.
-version 1 flies better upside down, which is awesome and confusing at the same time, something something dihedral?
-Am I overbuilding the front wing for lift? version 1 = 3/8" spare, version 2 =3/16" spare. Both tend to want to high-Alpha without extensive down trim or CG shift forward.