Horten 620mm

See my Horton 1200 Blog. For this build I scaled down to 620m span. AUW was 60gm running a 7x20mm brushed motor with a 55mm prop. Unfortunately the fuselage masked the prop and the motor simply did not have enough oompah! I also failed to notice the prop was slipping at full throttle which did not help.

I have rebuilt it with no fuselage and no KF plating just a simple under camber. The 8mm, or so, under camber in the middle of the wing has the effect of introducing washout at the tips and so almost no reflex trim is required.

The CG is 110 back from the nose. The prop is 115mm back from the nose. It does have belly strakes which "may" aid directional stability and also give something to hang onto to launch. Elevons are almost full half span and have a 20mm chord - top hinged.

AUW is 37gm and for now it still uses the 7mm motor.

I roughly dialled my dimensions into this CG calculator. I didn't bother with the bat tail.

https://fwcg.3dzone.dk/

I had too much up elevon on the flight of my V2. Yes it is also slightly tail heavy so I will move the CG 2mm (yes 2mm) further forward to where the calculator said it should be! Flies quite well but the pilot is definitely out of practice with the lockdown.

20200912 Horten IX 620mm (1 min 6 sec)

20200903 Horten 229 V2 (0 min 36 sec)

20200826 Horten 229 V1 (0 min 14 sec)

There are other small Hortons suitable for street or indoor flying.

FloridaX2: https://www.youtube.com/channel/UCaR...io_v_aGQs6s6OA