Mountain Models HiperBipe User manual

HiperBipe
Scale Aerobatic Electric Model
HiperBipe Specifications
Wingspan: 35.38 in.
Length: 31.3 in.
Wing Area: 358 sq. in.
Weight (Ready to Fly): 20 to 24 oz.
Wing Loading:8.0 –9.6 oz. /sq. ft.
Version 1.0, September 23, 2011

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WARRANTY
Mountain Models guarantees this kit to be free from any defects in both material and workmanship at the
time of purchase. This warranty does not cover ANY components or parts damaged by use or modification.
In no case shall Mountain Model’s liability exceed the original cost of the purchased kit. Mountain Models
reserves the right to modify or change this warranty without notice.
LIABILITY RELEASE
In that Mountain Models has no control over the final assembly or material used for final assembly, no
liability shall be assumed or accepted for any damage resulting from the use by the user of the final user-
assembled product. By the act of using the user-assembled product, the user accepts all resulting liability.
If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is
advised to return the kit immediately in new and unused condition.
THIS PRODUCT IS NOT INTENDED FOR CHILDREN 12 YEARS OF AGE OR YOUNGER.
WARNING: This product may contain chemicals known to the State of California to cause cancer and or
birth defects or other reproductive harm.
PRODUCT SUPPORT
This product has been designed to function properly and perform as advertised with the SUGGESTED power
system, speed control, and servos, as described in advertisements and in this manual. We do NOT support,
nor can Mountain Models assist in determining the suitability or use with any other electronics or hardware
not recommended by Mountain Models.
For the proper electronics to complete this model, replacement parts, and product assembly questions,
please contact Mountain Models online at www.MountainModels.com
Thank you for purchasing the Mountain Models HiperBipe. Our kit is a 1/8 scale model of the Sorrel SNS-7
Hiperbipe. Our model is a parkflyer model designed to give you a great scale model that is very unique,
aerobatic, and easy to build.
The HiperBipe can slow down greatly for easy flying and landings, and has plenty of power for any
aerobatic maneuver you can put her through.
The HiperBipe was designed using a state of the art 3D CAD package, to allow for exceptional interlocking
parts design and fit. 3D design also allows us to provide clearer assembly images, without having to use
photos.
The HiperBipe is built from self-jigging interlocking laser cut balsa and plywood parts. It's like a 3D jigsaw puzzle
with instructions. If the instructions are read before hand and followed during the build, the HiperBipe can be built
up and ready to cover in only a few evenings.
We think you’ll like the HiperBipe and look forward to any feedback you might have.
Thank you,
Brian Eberwein
Mountain Models
2935 N Lynndale Drive
Appleton, WI 54914
www.mountainmodels.com
Phone: [phone]

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Before You Begin
Check to make sure that all of your parts are there and in good shape.
Parts List
Number
in Kit Description of Part
Bundled Parts
1Laser Cut Parts (37 Sheets!)
1These instructions of course!
Metal (on the back of the wood bundle)
30.032” x 18” Wire
10.045” x 18” Wire
2Pushrod Housing x 18”
13/32” x 18” Wire
Plastic Parts
1Cowling
1Windshield
Bagged Parts
84-40 T-Nuts
24-40 Nuts
44-40 x 1” Nylon Bolt
44-40 x 3/8” Socket Cap Screws
24-40 x 3/8” Phillips Head Screws
14 #2 x ¼” Pan Head Screws
2DuBro 186 Micro Sport Wheels
2DuBro Control Horns
31/8” x 2.5” Dowels
112” Spider Wire
23/16” x 3/32” Magnets
1Velcro, 8” Double Sided
8#4 Washers
1Sullivan 1/2 “ Tailwheel
Sub-Bagged Parts
4DuBro Micro EZ Links
6DuBro Micro Servo EZ Connectors
Building Materials and Tools You Will Need
•Smooth and FLAT work surface
•Wax paper or clear plastic wrap to protect the work surface
•Thin Cyanoacrylate (CA) glue
•5 Minute Epoxy
•Hobby knife with #11 blades
•Needle nose pliers
•Wire bender or pliers for bending pushrod wires
•Wire cutters
•Screwdrivers

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•Sanding bar and 320-400 grit sandpaper
•Covering Iron
Finishing Materials You Will Need
•Covering material (SoLite, 2rolls)
•Covering Trim (SolarTrim)
Electronics You Will Need
•4channel radio minimum
•4to 6 channel mini receiver (Berg 4L, Berg 7, or Spektrum 6110e)
•4ea. Hitec HS-55 servos
•Scorpion 2215-1127
•APC 10x5e Prop
•Scorpion 25A ESC
•3S-1300 to 3S-1400 mAh LiPo
•1 Pair Deans Ultra Plugs for Battery and ESC connection
General Building Tips
•READ THE INSTRUCTIONS all the way through and study the plans BEFORE starting any
work on the model.
•PRE-SANDING: BEFORE removing any parts from the balsa sheets, use a sanding block
with 320 grit sandpaper and lightly sand the back of the balsa sheets. Our balsa suppliers
have been sending us wood that is slightly over sized, so sanding the back of the balsa
sheets reduces the thickness just slightly and removes any charring from the laser cutting
process.
•Balsa is a lightweight and fragile wood, so you do need to be careful with it; however, you
will also need to use a little bit of force to make everything fit properly, so don’t be too
timid.
•Do not remove any pieces from the balsa sheets until they’re ready to be used. That way,
parts won’t get mixed up or disappear.
•Do NOT glue anything until told to do so.
•Join all of your pieces using thin CA (Cyanoacrylate) glue, unless we tell you otherwise. In
general, only a small amount of CA is necessary to glue parts together.
•Don’t over force your pieces together. If they aren’t fitting together properly, make sure you
have the right pieces and that they are oriented correctly. If needed, you can lightly sand
the part to fit after making sure it is the correct part and oriented correctly. On balsa “tabs”,
you can “pinch” the wood with your fingers to get them to fit in slots. (The tabs might be
tighter some times, due to tolerances in wood thickness)
•If you want to remove the charred edges caused by the laser cutting process, lightly
dampen a cloth with bleach and gently rub the affected areas. Removing the char will not
increase the strength but will make it look better. It also keeps that dark edge from showing
under the lightweight coverings.

FUSELAGE ASSEMBLY:
1. Slide the 18" Lt. Ply F3
(with text facing
FORWARD) into the Lt. Ply
crutch, F1 (with text facing
UP), rotating it into place.
Do NOT glue it yet.
2. Press the crutch into the
1/16" plywood F4, with the
text of F4 facing
FORWARD. Do NOT glue
it yet.
3. Glue the 3/32" Balsa F14
parts together to form F14,
using thin CA, as shown
below.
4. Glue in the #4 washers,
flush with the TOP of F14.
5. Press F14 into F3, but do
NOT glue yet.
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6. Press the 18" Lt Ply F2 onto
the crutch assembly. (Do
NOT glue yet)
7. Insert 4-40 T-Nuts into the
bottom (dirty) side of 18" Lt
Ply F5. Make sure they are
flush with the part, using a
hammer, if needed.
8. Press 332" balsa F7 into
TOP of F5. Do NOT glue
yet.
9. Insert 4-40 T-Nuts into
TOP (clean side) of 18" Lt Ply
F10.
10. Press 18" Balsa F9 into
F10 with the taxt facing as
shown in the image to the
left. Do NOT glue yet.
11. Press the F9/F10
assembly into F4, as shown
below. Do NOT glue yet.
6

12. Press the 132" Ply F21a
into 332" Balsa F21. Make a
LEFT and RIGHT,
assembling them side by
side, as shown. Making sure
they are pressed fully
together.
13. Glue the 116" balsa F21b
onto F21a, using thick CA,
being sure that they are lined
up.
14. Secure the dovetail joints
between F21 with thin CA.
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15. Insert the crutch
assembly into F21 with the
plywood doubler facing to
the OUTSIDE. It helps to lay
the doubler on the table and
press the crutch into F21.
Then, pick it up and press
the doubler fully onto the
crutch. So it a bit at a time
and do not press on any area
that does not have a former
or crutch behind it. Do NOT
glue anything yet.
16. Press the 18" Lt Ply F6
and F10 assembly into the
fuselage side doubler, as
shown. The T-Nuts on F10
are to the FRONT of the
plane. Do NOT glue them in
yet.
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17. Press the other fuselage
doubler onto the crutch, once
again with the plywood
facing to the OUTSIDE.
18. Yes, you really do get to
use the glue bottle in earnest!
Glue all of the joints in the
assembly with thin CA,
AFTER making sure all parts
are fully pressed together,
and that F9 is at a slight
angle to match the slots in
the side doublers.
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19. Glue the 332" Balsa F15
parts together, using thin CA.
20. Press F15 in place in the
fuselage crutch, as shown.
The small holes in F15 (for
hatch screws) goes to the
back of the fuselage. Do
NOT glue it in place yet.
21. Press the 18" Lt Ply F8 in
place, as shown. Make sure
it is straight and fully
inserted, and secure it with
thin CA.
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22. Press the 332" Balsa F16
dashboard in place in the
fuselage assembly. Secure
with thin CA.
23. Glue the 116" Balsa
fuselage sides together,
consisting of F23, F23a,
F23b, F23c, and F23d. The
parts shown below marked
with X's have the dirty side
of the wood facing up, for
best parts fit.
24. Repeat step 23 to make
the other fuselage side.
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25. Glue the fuselage parts,
F18 (116" Balsa), F19 (332"
Balsa), and F12 (332" Balsa)
together with thin CA, as
shown above.
26. Glue a fuselage side onto
the RIGHT side of the
fuselage crutch assembly
with thick CA. Make sure
the fuselage side is pressed
completely onto the crutch
assembly.
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25. Press F13 and F11onto F12. The text on F11/F12
should be facing FORWARD and the text on F12
should be UP. Do NOT glue them yet.
26. Press the F11/F12/F13 assembly into the right
fuselage side. Do NOT glue yet.
27. Press the LEFT fuselage side
onto the crutch and F11 assembly.
Square up the fuselage and secure
the joints with thin CA.
28. Glue the Landing Gear Mount
parts together, using thick CA and 18"
dowel for alignment. LG1 (18" Lt Ply),
LG2 (116" Ply), LG3 (132" Ply), and
LG4 (116"Ply).
29. Glue the Landing Gear Retainers
together, using thick CA and 18"
dowel for alignment. LG2a (116" Ply)
and LG3a (132" Ply). 13

30. Slide the Landing Gear
mount in place, with LG1 facing
the FRONT. Glue in place with
thin CA.
31. Glue F20 and F18 in place
on the fuselage. ONLY glue in
F20 at this time, with thin CA.
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32. Press F19 into place on the
fuselage. Make sure all joints
are fully inserted. Press the back
of the fuselage down so it is
sitting FLAT on the fuselage
bottom and secure the fuselage
top and bottom with thin CA.
33. Glue the 116" Balsa F17 parts
together with thin CA. Slide the
F17 part into the fuselage, by
bending it slightly. Use thick
CA to glue it in place over the
formers.
34. Glue the 316" Balsa F25 in
place, as shown, with thick CA.
35. Glue the 332" balsa H1 and
H1a parts together, using thin
CA.
36. Glue H1 onto the H2 parts,
using thick CA, making sure
that it forms to the curve on the
H2 parts.
37. Glue the 116" Ply H3 tabs in
place, on H1, as shown below,
using thick CA.
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35. Slide the hatch in place, and
secure in place with 2 of the #2x
14" screws. Do NOT overtighten
the screws. Take out the screws,
remove the hatch, and reinforce
the threaded holes with thin CA.
36. Glue the 332" balsa FH6 parts
onto the116" plywood FH9 parts,
making sure to line up the slots
in the bottom. Make a RIGHT
and LEFT version, as shown in
the image.
37. Glue the 332" Balsa FH1 and FH1a parts together,
using thin CA.
38. Glue the 132" Ply FH3 and 116" Balsa FH3 parts
together, using thick CA and 18" dowel to align the
parts.
39. Dry assemble FH1, FH2, FH3, and the FH6/FH9
assembly with the plywood on FH9 facing OUTSIDE.
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40. Glue the 18" Balsa FH8 in place, as shown.
41. Glue the 116" Balsa FH5 in place, lined up with
the front of FH2 and centered on FH8.
42. Glue the 116" Balsa FH4 parts together, using
thin CA.
43. Dry fit FH4 in place on the hatch frame. When
satisfied with the fit, glue it in place with thin CA.
44. Glue in place the 116" Plywood FH10 parts in
place on the hatch, as shown, with thick CA.
45. Glue in place the 316" x 332" magnets, flush with
the hatch bottom, with thin CA.
46. AFTER COVERING, glue in the 316" Balsa FH4
with thick CA.
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PUSHROD HOUSINGS
PUSHROD HOUSINGS
47. Glue the pushrod housings in place, as shown
above. Leave about 18" of pushrod in front of the
former.
48. Trim the pushrod housing flush with the
fuselage top and bottom, where they exit.
49. Glue all 18" Balsa tail parts together with thin
CA, as shown in the images above. Glue the 18"
Basswood skid in place with thick CA. The
Basswood skid is in the parts bag. 18
BOTTOM VIEW

TOP OF
ELEVATOR
SIDE VIEW OF ELEVATOR
SANDING
BLOCK
STEEL
RULER
STEEL
RULER
TOP VIEW OF RUDDER
51. Sand all tail parts lightly with 320
Grit sandpaper.
52. Sand a bevel in the elevator and
rudder, as shown. The easiest way to
do this is by placing a metal straight
edge below the part, and one on top
of the part. That way, you don't end
up with a wavy hinge line.
50. Glue all 18" Balsa Stab and Elevator parts
together with thin CA, as shown in the images
above.
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53. Press 18" Lt Ply MM2 and MM3 onto the 116"
Plywood MM4, but do NOT glue yet.
54. Press the 18" Lt Ply MM1in place, as shown.
55. Make sure parts are fully inserted and secure
with thin CA.
56. Glue MM5 in place, with thick CA.
57. Insert 4-40 T-Nuts from behind, as shown. Use
a washer on a 4-40 x 38" cap-head screw and screw
it into the T-Nut to pull the T-Nut in place.
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