RC-Laserkit Bubble Sinbad User manual

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V5 (02.06.2020)
Bubble Sinbad is a Vintage glider / Motor-glider designed by RC-Laserkit in classic wood
construction.
This model may be easily modified to supprot brushles motorization.
The particularities:
•laser-cut all-wood construction with dovetailed and weight-optimized,
•component-transport friendly due to two-piece wing,
•optionally with motor Pod for electric drive
The kit:
The model may be build on a plane surface of 1,5m x 0,5m.
The wings are constructed with an intro leading edge, pine spars, light plwoody ribs, balsa planking.
The stabilisator is constructed using a plywood template. The laser-cut ribs are accurately
positioned and positively positioned with the support feet in the auxiliary template which allows a
structure without a blueprint.
The wing joiner is handled by a 6mm steel rod to be bend to obtain 14 grades dihédral angle.

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The kit includes – all the parts listed below:
ID
Qty
Material
Description
L (mm)
x
W (mm)
x
H (mm)
10
Pine strip
fuselage side spar
1000
5
3
4
Balsa strip
Stabilisator spar + Rudder Ribs
1000
8
3
3
Pinestrip
Wing Rear spars
1500
8
2
6
Pine strip
Main wing spar
100
10
4
1
Balsa strip
leading edge elevator flaps + hinges rein-
forcement
1000
15
15
3
pine Leading
Edge
Leading Edge diameter 5mm
1000
5
1
Windshiel 0,5
mm PVC
Template to be downloaded from
www.rc-laserkit.com
1000
1
steel rods
dihedral to be set to 14° in total
500
6
2
brass pipe diam.
7 x 0,6
Wing joiner
250
7
0,6
1
pine strip
wing holder diam 6 mm
500
6
6
1
Balsa sheet
cockpit sheeting
1000
100
1,5
1
Balsa strip
Reinforcement blocks for wing holder
sticks
200
25
25
1
Ply
Stabilisator building template
700
350
3
PW1
2
Ply
Set of 18 wing ribs
3
PW2
2
Ply
Wing spars + decks
3
PF1
1
Ply
fuselage formers
3
PF2
1
Ply
fuselage spars
3
PF3
1
Ply
fuselage spars
3
PF4
1
Ply
fuselage spars
3
PF5
1
Ply
Cockpit formers
3
PF6
1
Balsa
Rudder
3
PF7
1
Balsa
Rudder
3
PF8
1
Ply
Stabilisator spar
3
PF9
2
Balsa
Stabilisator ribs
3
PF10
1
Ply
Stabilisator trailing edge / Leading Edge +
Wing tips
1
PF11
1
Balsa
Stabilisator leading edge (To sand in
shape)
10
PF12
1
Balsa
fuselage Noze blocs
10
PF13
5
Balsa
Trailing Edge sheeting
2
PF14
6
Balsa
Leading Edge sheeting
2
1
Paper
Plan as indication of the elements position
Not included in the kit are adhesives, iron-on film and RC components.

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Necessary building material:
• For the construction of the model we recommend a construction kit with the dimensions
1500mm x 500 mm
• CA glue, wood glue.
Recommended RC equipment:
•Battery (4 cells Eneloop 750 mAh (AAA size)
• 3-channel receiver with normal range
• 2 x standard servos 53,5kg)
For the motorized version:
Motor Brushless 200W to 300W
oD-Power Brushless Motor AL28-14
oD-Power Brushless Regler "Comet" 20A
oLipo 3S 1500mAh
oPropeller 8 x 4
Technical specifications:
Span: 2800 mm
area: 81,02 dm²
sweep: 0° at the front.
Wing loading: about 20 g/dm²
flight weight: +/- 1200 g to 1500 g
Profil: ca. 8 %
Setting values:
Neutral / Elevation + 0 mm
elevator + 12 / - 12 mm
Direction + 25 / - 25 mm
Center of gravity 90 mm to 100 mm from
Leading Edge

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1. Fuselage
Prepare fuselage spar.
Glue together the two parts of fuselage upper Spar
1. Rudder
Assemble R1, R2, R8, R7 on the fuselage spar R3 .
It is easier to do it now to be able to build the rudder on a plane surface.
on the latest version R3 is part of the fuselage upper spar !
Glue together the four parts of the fuselage lower spar to get the 6 mm thickness lower spar!
Glue together the two parts of the fuselage right and left spars.

Glue together formers F4 and F4a taking care F4A must on the front side of the fuselage
Maintain de lower spar vertical and position the formers in the slots starting from the front
with F1B, F2b, F3b, F4d
Position the horizontal deck DH1 and make sure DH1 is perpendicular to F4a and F2b,
adjust slot in fuselage lower spar if necessary.
Place Formers F5a to F10 on the fuselage lower spare.
Place the formers F1a, F2a, F3a on top of DH1 deck aligned with respectively F1b, F2b,

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F3b, make sure formers are perpendicular to DH1.
Place the Fuselage upper spar and the fuselage side spars. Be sure F10 is perpendicular to
fuselage upper spar.
Place the pine 3x5 strips all around on the side of the fuselage
Place the two WB pieces that will support the wings on the top of the fuselage.
Glue the noze balsa blocks together. Then glue the block to F1a and F1b
Prepare the pieces for the cockpit, verify the clearance in between the cockpit spars RSP and
LSP and the available room in between F2 and F4.
Adjust the spars RSP and LSP if necessary.
Mount the formers F4c and F2c on the spars RSP and LSP making sure they are parallele to
F4 and F2 fuselage formers.

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2. Stabilisator
Immobilize the building template on the building board. Make sur it is plane.
Insert the ribs in the template slots
Place the horizontal leading in ply 1mm edge and glue it !
Place the 3mm ply trailing edge and glue it
Place de elevator Leading edge and glue it
Place the elevator trailing edge and glue it
Place the balsa 8x3mm spar
Place stabilisator balsa leading edge and glue it
At that stage you may remove the stab from the template continue with the under side ot the stab.
Place the balsa 8x3mm spar
Remove carefully the building tabs under the ribs
Separate the stabilisator from the elevator by cuting in between the two vertical spars
Glue some 15 x 15 balsa blocks for the hinges
Glus some 15x15 basla on the leading edge fo te elevator and sand it round
The two elevators may be linked by a carbon tube later:
Or you may join the command line at servo side.

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3. Wings
Use a right reference like on the picture the yellow Ruler to align the
trailing edge:
Insert the ribs in the main vertical slotted spar and the horizontal
slotted railing edge maintain all of it with elastic braces so it is aligned with
the ruler.
Place the Decks as well, then when everything fits well, glue
everything together making sure the trailing edge is right.

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At the root remember to respect the 7 grades inclination for dihedral
Once glue is cured, you can glue the top 15x4 spar in place and the top
8x1.5 spar also
Glue the trailing edge diam 5mm
Once glue is cured, you can glue the bottom 15x4 spar in place and the bottom 8x1.5 spar
also
Then start to place the top trailing edge sheeting
Then top leading edge sheeting
Then you may remove the small building tabs on the bottom if your version have it and
place bottom sheeting pieces.
At last the wing tips
Then sanding….