Plan Download from: https://jivaro-models.org/fiu/page_fiu.htm

Second one Fiu laser cut short kits start to build...

BD-5 head down thrust hard to take off problem (0 min 12 sec)

Add motor bottom and left side angles, wait for test...

BD-5 finally landing in one piece (0 min 39 sec)

Lucky day.

BD-5 repaired again (0 min 7 sec)

return motor Angles to original design.
add bottom color for better visualize.

BD-5 crash again (0 min 40 sec)

Before it under strong winds blow to the street, cut the motor to landing, then crash again.

BD-5 repaired (0 min 11 sec)

Heat shrink tube for motor to ESC plug.

Change propeller to GF 6*4E soft than APC 6*4E and much cheaper, no vibration more smooth.

Wait for next Monday morning test flight...

BD-5 suddenly lost power crash (0 min 19 sec)

I guess when add motor angles cause the motor to ESC plug loosen.

Add motor angles seems more easy to take off, or because after rain the grass more smooth.

Change 3S 2200mAh to 3S 2600mAh and add balance lead, total weight become 690g, m
Look like head heavy. No chance to test it.

BD-5 KFm-3 airfoil windy day maiden flight ( head light lucky not crash ) (1 min 30 sec)

Wrong C.G setup can't glide when motor off, and the wind make it worse.

BD-5 KFm-3 airfoil build log (1 min 15 sec)

KFm-3 airfoil
Material 6mm KT board, bottom 5mm XPP
Wingspan 900mm
Length 810mm
Height 280mm
Weight 660g
Motor 2212 2200KV
ESC HOBBYWING SKYWALKER 30A
Receiver DSMX 6ch 2.4GHz
Servo EMAX ES08A II 8.5g * 2 ,EMAX ES3301 * 1
Propeller APC 6*4E
Battery 3S 2200mAh

http://rc-plans.com/plans/bd-5-1.jpg

Plan Download from : http://rc-plans.com/catalog/item24.html

Material 6mm KT-board ( original design use depron)
Wingspan 35"
Motor 2212-6 2200KV
ESC 30A+
Propeller APC 6*4E
Battery 3S 1800~2200mAh
Servo 2~3 * 9g
Weight 570g
C.G position: 1/2" in front of centre of wing spar.