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Feb 27, 2018, 08:04 AM
Registered User
tnx for quick reply..... will try CoG 25% of the wing's main aerodynamic chord
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Feb 27, 2018, 12:09 PM
Fly low and slow
TrueBuld's Avatar
Originally Posted by smajci
Here are some pics from my is not so precise build as seen from other builders but it will do "i hope"
Nice work.
What Turnigy motor is that?
Feb 28, 2018, 08:44 AM
Registered User
the motor is Turnigy D3542/6 1000KV battery will be 3200 4s and i have 13x4 prop but i think that i will have to buy smaller prop because in manual say max prop is 10x5 ...i have few 9x6 props and i will use it for my maiden flight..
Feb 28, 2018, 12:49 PM
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Late99's Avatar
On 3S 13x6 would be my choice for that motor. For 4S 10x5 seems to be the way to go.
Feb 28, 2018, 01:16 PM
Fly low and slow
TrueBuld's Avatar
Originally Posted by Late99
On 3S 13x6 would be my choice for that motor. For 4S 10x5 seems to be the way to go.
I do find that odd; as instinctively I would think more voltage with a 4s than a 3s therefore more power to swing a big prop with more pitch?

However, your advice correlates with what hobbyking state as Prop size: 7.4V/11x7 14.8V/10x5.

Perhaps they are concerned that going the other-way the max current would go beyond 38Amps

Battery: 2~4 Cell /7.4~14.8V
RPM: 1000kv
Max current: 38A
No load current: 2.4A
Max power: 665W
Internal resistance: 0.031 ohm
Weight: 130g (including connectors)
Diameter of shaft: 5mm
Dimensions: 35x42m
Prop size: 7.4V/11x7 14.8V/10x5
Max thrust: 1260g
Last edited by TrueBuld; Feb 28, 2018 at 01:22 PM.
Feb 28, 2018, 03:09 PM
Warbirds Lover
Dreamcatcher's Avatar
If my memory is good Arm1s indicated the engine esc and prop he used on that great plane.
That can also help ��
Feb 28, 2018, 03:23 PM
Registered User
i just dont want to buy new engine.....i will just buy 10x5 prop if i have to.....have a few 9x6 prop for the start..that engine and 9x6 worked brutal on my bix3
Mar 01, 2018, 05:13 AM
Warbirds Lover
Dreamcatcher's Avatar
I'm not sure that a 9x6 will be big enough for that plane. The prop diameter give you the torque needed to tow the plane .. (Arm1s used a 12x6 on a turnigy 3639 1100Kv that is a 800W brushless).
The 3542-6 that you plan to use is indicated as 665W with 1250g of thrust with a 10x5 or 11x7 prop.. 9x6 will give less thrust and the Arm1s plane's weight was 1100g... i.e. the plane will fly but may not be able to climb verticaly with your setting.
Mar 01, 2018, 05:21 AM
Registered User
You are right......i will buy 10x5 an go with 4s. After maiden flight i will let you know how it fly .....tnx for all advices
Nov 04, 2018, 03:28 AM
Registered User

Are the wings detachable?


Thank you for the plan, great work.

Can you please someone tell me, the wings are detachable? If yes, how do they hold together after they are assembled? I have never been able to figure this out:-))

Nov 04, 2018, 03:54 PM
Warbirds Lover
Dreamcatcher's Avatar
Hi Adam,
Yes they are. The half wings have a couple of threaded shafts fixed in and they are used to fix the wings to the fuselage sides (round plywood reinforcers + nut are drawn on the side view of tve fuselage).
Have a nice evening
Nov 05, 2018, 02:07 PM
Registered User
Ah, great, thank you - great design!:-) I have just ordered depron plates....
Nov 05, 2018, 02:56 PM
Registered User
Wow what an awesome design.. Really want to build it but my build skills asrnt quite there. Understand most of the plans though.

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