Always wanted to get into wing-type models, but never liked the looks of the stryker... Built a few funjet clones (Prime-Jet 8)- great flyers! Once I saw the Scimitar, I knew I had to have one, but it is well out of my budget...so... here goes!!! May add the thrust vectoring at a later point depending on how she flies...Got the model done... prototype-done...maiden video -done (posted below)
She flies!!! So, as promised, plans are below. I have also scaled them up to a 34" version for those that would like to use a traditional parkjet power system with a 6" prop. Plans are pretty freeform so you can put stuff wherever you like. I suggest building the airframe first and then cut areas for servos, motors, cooling vents, hatches, etc... be sure to post pics! Enjoy!
Stats for the 28" prototype:
WS: 28"
KFm4 airfoil
AUW: 11.4oz - 1000mah 3S lipo; 12.7oz - 1300mah 3S lipo
Airframe minus batt: 8.4oz
Bare airframe (unpainted, no electronics): 3.1oz
Lipo: 1000 - 1300 3S lipo (25-30C) -- (I prefer the 1000mah 3S 30C)
ESC: 30A (all I had available - min 20A; 25A to be safe)
Servos: 2x9g (elevons); 2x5g (rudders)
motor:2800KV outrunner
Prop: 5043; will also try 5x5 speed
Prop UPDATE: 6x4 - it's close, but it will fit between the rudders - this is my favorite prop - the acceleration is quick - she will shoot wherever the nose is pointed - much easier to get out of "sticky" situations...
CONTROL THROWS (28" Version):
These are my settings -- adjust to your liking!!! Note - I do not use dual rates on this model - only expo. Elevator throws are very aggressive at endpoints. Too much elevator sits her on her tail and reduces airspeed to near zero (see video). Be sure you have the thrust (or altitude) to get out of this! If not, I would strongly suggest reducing elevator throws.
ELEVATOR: 3/4" up; 3/4" down -- 50% expo
AILERON: 7/8" up; 1" down -- 35% expo
RUDDER: 1-1/4" left/right -- 25% expo
Explanation of 3-Stage wing profile:Below you will find a diagram detailing how I sanded the leading edge. The wing has a 3-stage leading edge profile. Not sure how much of a difference this makes - but it works for me! The theory behind the 3-stage sanding was to create reflex and improve stall characteristics for maneuverability. It seems to work wonderfully, but is untested b/c I never flew it without the 3-stage leading edge...
Compilation Video w/ 6x4 prop!:
Maiden video - 1000 & 1300 lipos:
Since the maiden video, I have greatly reduced the elevator throws, and added additional support to the wing. I also now mount my batteries flat. In the maiden, I had the battery mounted sideways which was making the roll very sloppy. Roll is much more axial with the battery in the flat position. With the above adjustments, I can now knife-edge with rudder and a little bit of aileron input. Once I get some more stick time, I will post a short highlights video.
Plans :
- SNICE-MITAR_34_FULL 34" version for 6" props -- full plan
- SNICE-MITAR_34_TILED_A4.p... 34" version for 6" props -- tiled A4
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