Buy now at: https://cults3d.com/en/3d-model/gadget/xb-70-valkyrie
This one was a total surprise! I brought a garbage bag in my pocket for the crash that never happened. I never thought something so long would fly so well. Not to mention it only uses twin 40mm fans.
The XB-70 flies similar to the SR-71, slightly more sluggish but that makes it slightly easier to manage. it comes in for a super soft landing also. I was able to easily hand launch it just by holding it by the rear exhaust ports.
Specs:
Length 49"
width 26"
weight ready to fly with a 1300 872g
Parts needed
2x fans https://a.co/d/fXuZxkc
2x ESC https://a.co/d/dTpemSF
2x extension wire https://a.co/d/6K3oFnk
ESC splitter https://a.co/d/hPlQ9Yp (need the length)
2x 9g servos https://a.co/d/hPaP6IV
CA glue to assemble
hot glue for the fans and servos
1.2 mm pushrod
Pre flight :
use the bottom hole on my control horns
use the top hole on the Muzuzi 9g servo arm
MAX out your rates for roll and pitch on your servos.
Maiden flights
3D printing settings
always use active foaming LW pla and get your printer dialed in.
starting from the front!
fuse 1 = 2% gyroid
fuse 2 = 3%
fuse 3+ = 3%
rear last fuse 6% gyroid
wings 3% gyroid
elevons 5% gyroid
vertical tails 3 % gyroid
canards 3% gyroid
edf covers 2%