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Apr 19, 2007, 10:27 AM
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TurboCinqy's Avatar
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My 3D Foamy (Bi Night) Biplane (PDF drawing)

Hi there,

I'm just new here and want to show my plane.
Did designed it a few months ago and it is flying for 3 week right now.

maybe someone is interested to build it so here are the drawings.

Named it "BI NIGHT 3D" (Black Biplane) Parkflyer

Wingspan 700mm
Length 815mm
Weight 275 grams
Himodel 1611Kv Brushless
Himodel Fly 12A speed controller
Himodel 2S1300 12C LiPo
Prop: GWS 8x4.3
Static thrust about 400 grams @ 9.8Amps.


PDF Drawing in A0]

Download (A0)

Download (A4 Tiled)
Tiled (lose parts)

Last edited by TurboCinqy; Jun 19, 2007 at 04:40 PM.
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Apr 19, 2007, 12:21 PM
Nice, very elegant looking even with a almost constant cord wing.
Apr 19, 2007, 04:01 PM
Flying High Again!
Triptykon's Avatar

That's sweet!

Wish I had the skill to build my own and not buy those expensive kits!
Jun 19, 2007, 12:16 PM
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TurboCinqy's Avatar
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I still didn't make a good (longer movie) but it better than nothing.

Bi-Night Preview 3D Brushless (0 min 53 sec)
Jun 19, 2007, 02:56 PM

Oh So Tasty !!

That is a wonderful little bipe, I can feel my fingers itchin already to build myself one. Couple of questions tho, for the firewall/engine mount did you make a small peice with notches for the vertical and horizontal fuse sections or was it a flat plate with the ends of the fuse section glued on to make them come out around the motor ?. Also do you think making a small hinge out of some very narrow plastic tube (like the ink tube in a ballpoint pen) with a pin pushed through it to make a swivel joint and the CF pushed into the tupe would be strong enough as a method of joining the upper and lower ailerons ?
Jun 19, 2007, 03:10 PM
Registered User
I like it. Nice flying in the video too.
Jun 19, 2007, 05:03 PM
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TurboCinqy's Avatar
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Motormount is made like this.

(it's not fully scale) circel is drawed at 28mm on this picture
It's only a sketsch to give you an impression)

Flat 1.5mm plywood.

It's a little hard to get it in.
Make a little more space at the bottemslot to turn it in.

Or make something like this.

The hinges are made of normal desk tape with 2 layers at some points.
Rudder controls are made of a piece of glasfiberplate.
Some people put a little rod in the rudder and connect it with heatshrinking tube and connect is to the pushrod.
i did it with 0.5mm steelwire. a littel glu and heatshrinking tube to lock it in place. Pushrods are made of 2mm massive carbonrod.

Only thing to get the plane stronger is placing a carbon rod diagonal between bottomwing to mid top wing or and a 4mm hollowrod in the bottem wing.

But without it will hold if you don't crash
Last edited by TurboCinqy; Jun 19, 2007 at 05:12 PM.
Jun 19, 2007, 06:22 PM
Out the Window
High Flyin''s Avatar
Nice looking bipe. VERY clean looking build. Looks like it flys as good as it looks.
Jun 22, 2007, 05:33 AM

I seeeeee

Ah, I see now what you did with motor mount, and good advice on the Carbon Struts, I happen to have a few odd pieces lying around so I will be putting some of them to good use.

Thanks again for sharing the plans, this will be my first bipe and it looks like an ideal one to start with.
Jul 01, 2007, 09:12 AM
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pope417's Avatar
TurboCinqy,thanks for the plans on this plane.finished building last night and had 2 great flights this morning,now for a little paint.GREAT PLANS AND PLANE.THANKS AGAIN.
Jul 03, 2007, 05:29 PM
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TurboCinqy's Avatar
Thread OP
If there are things which could be better let me know or let it know in this topic.

And i like to see some photo's and a flying impression of you.

Greets Dennis
Last edited by TurboCinqy; Jul 05, 2007 at 03:06 PM.
Sep 22, 2007, 01:20 PM
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TurboCinqy's Avatar
Thread OP
Some new pics.

Nov 19, 2007, 06:27 AM
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Malc's Avatar
Hi is the weight quoted the 'all up' flying weight?
Nov 30, 2007, 03:52 PM
Balsa to the Wall
I have one of these cut out and ready o assemble. can someone tell me where the CG is located?


Jan 01, 2008, 07:19 AM
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TurboCinqy's Avatar
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This is the flight weight (275grams) and CG is on the plan
(top wing CG dot on the vertical fuselage part)

If you want you can shift it a bit foward of backwards.
With a bit wind i shift the battery a bit foward to get a bit more speed without motor.
Last edited by TurboCinqy; Jan 01, 2008 at 07:30 AM.

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