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Posted by lawrence4 | Nov 15, 2021 @ 01:22 AM | 4,735 Views
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.
Posted by lawrence4 | Nov 13, 2021 @ 04:23 PM | 5,619 Views
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...
Posted by lawrence4 | Nov 11, 2021 @ 10:57 PM | 7,192 Views
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.
Posted by lawrence4 | Nov 10, 2021 @ 06:55 AM | 8,704 Views
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
Receiver DSMX 6ch 2.4GHz
Servo EMAX ES08A II 8.5g * 2 ,EMAX ES3301 * 1
Propeller APC 6*4E
Battery 3S 2200mAh
Posted by lawrence4 | Oct 31, 2021 @ 07:50 PM | 14,774 Views

Plan Download from :

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.
Posted by lawrence4 | Oct 27, 2021 @ 04:34 AM | 11,596 Views
Balsa PYTH700
Airfoil FAD04
C.G 138mm
Wingspan 700mm
Length 428mm
Height 120mm
Weight 243g
Motor EMAX 1804 2480kV
BEC Matek micro 5V 1.5A
Receiver dsm2 6ch
Servo DUALSKY AS55 6g x 2
Propeller 5030
Battery dualsky 3S 550mAh

Maiden Flight:
Balsa PYTH 700 Maiden Flight Catch (9 min 22 sec)

Original design depron version:

Build log photo:

Build log video:
Turn depron Pyth700 to balsa Pyth710 (0 min 55 sec)
...Continue Reading
Posted by lawrence4 | Oct 18, 2021 @ 10:33 PM | 15,085 Views
Albedo Maiden Flight (9 min 54 sec)

Plan download from:

Wingspan 1186mm ( printer error )
Length 920mm
Height 128mm
Surface :24dm
Weight 593g
Wing load :24.6 g / dm
Motor DUALSKY ECO 2212C 980KV
Receiver STORM S603 DSMX 6ch
Servo EMAX ES08AII 8.5g * 3
Propeller GWS 9050
Battery 3S 2200mAh
Matek micro BEC 5V 1.5A
Posted by lawrence4 | Sep 22, 2021 @ 10:35 PM | 24,836 Views
Speedy Bee water foot test run (1 min 16 sec)

It's look like the motor not enough power to take off from water.
Posted by lawrence4 | Jul 15, 2021 @ 09:53 PM | 15,808 Views
1951 unknown flying wing catch landing (2 min 46 sec)

Reset the elevons position and add nose weight more easy to control.