Avantco Mostro 700 Nitro User manual

Avant Mostro 700 Nitro
Assembly Manual Version 1.10
unleash the monster inside
Mostro
Copyright 2014 Avant RC. All rights reserved
Latest Assembly Manual is located at:
http://www.AvantRC.com/Products/Mostro/n700MostroManual.pdf

Page: 2 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
!
!
LIABILITY DISCLAIMER
This kit is for a radio controlled (RC) helicopter. RC Helicopters are not toys.
Moving parts can present a hazard to operators, bystanders and anyone or
anything that could be reached by the RC helicopter. Improper operation,
maintenance or assembly can potentially cause a helicopter to pose a danger
to persons or objects including but not limited to the possibility of causing seri-
ous physical injury and even death. After leaving its facilities the manufacturer
has no way of maintaining control or supervision over the assembly and/or op-
eration of the helicopter therefore the manufacturer and/or its agents assume
no responsibility or liability whatsoever for any damages including but not
limited to ones generated by incidental or consequential damages. The opera-
tor of the helicopter assumes all responsibility and liability that could be result
from the correct or incorrect operation of the helicopter.
This product is intended to be used by experienced adult radio control helicop-
ter pilots under controlled safety conditions and on locations properly autho-
rized and setup for safe ying and away from other people. This product must
not be operated without reasonable Liability Insurance.
Under no circumstance should a minor be allowed to operate this or any radio
controlled helicopter without the approval, supervision and direction of his par-
ent or legal guardian who takes full responsibility for the minor’s actions.
Do not operate an RC helicopter within the vicinity of homes, trees, electrical
lines during inclement weather or rain or near crowds of people.
Before you start assembling:
Get the latest manual: It’s highly recommended that you get the latest version
of the manual. Please download a copy by clicking below:
http://www.AvantRC.com/Products/Mostro/n700MostroManual.pdf
and use that copy instead of this one.

Page: 3 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
!
Preparation of ALL Carbon parts.
Important: Using a piece of sanding paper sand and round the edges of ALL the
carbon ber pieces.
Sharp edges can cut into the electric wires and since carbon ber is conductive
it can possibly create an electrical shortcut. Sharp edges can also cut into con-
trol and power wires creating shorts that could make the motor and or electronics
operation fail. Whenever you’re ready to install a carbon ber piece make sure to
sand all its edges to prevent wire chang and a possible electrical short circuit.
Sand Edges
Make sure edges are
round and smooth on
ALL carbon parts not
only the frames

Page: 4 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
Step 1: Bottom gear plate assembly.
M3x6 Button Head Screw
Tail Belt Idler Pulley
Idler Pulley Short Post
M3x12 Socket Head Screw
M3x6 Socket Head Arm Stopper Screw
M3x16 Button Head Screw
Tail Belt Idler Pulley Arm
Torsion Spring
Unless directed otherwise ALWAYS USE BLUE LOCTITE
on all threads except for locknuts. Failure to do so can
make parts come lose during ight creating hazardous
and dangerous conditions.
!
IDLER PULLEY ARM
Attach the short post to the ten-
sioner idler pulley Arm.
Install the idler pulley.
Install the arm stopper M3X6
screw.
Place the torsion spring inserting
one end into the bottom gears
plate.
Insert the arm into the torsion
spring.
Insert screw to hold arm in place.
Rotate the arm between the stop-
per screw and the bearing edge
and slide it down the screw and
then tighten the screw.
Make sure the arm moves freely
between the stopper screw and
the bearing seat wall.
HARDWARE BAG CONTENTS
Qty Description
2 - M3x6mm Round Head Screw
4 - M2.5x8 or 10mm Socket Head Cap
5 - M3x6mm Socket Head Cap Screw
1 - M3x16mm Round Head Screw
1 - M3x12mm Socket Head Cap Screw
4 - M4x8mm Socket Head Cap Screw
5 - M4x10mm Socket Head Cap Screw
2 - M4x12mm Socket Head Cap Screw
1 - M4x18mm Socket Head Cap Screw
1 - M4 Locknut
1 - 10x12x1 Bearing Spacer
1 - Idler Pulley Arm Torsion Spring

Page: 5 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M3x6 Button Head Screw
M2.5x8 or 10 Socket
Head Cap Screw (4)
Tail Belt Idler Pulley
Idler Pulley Long Post
M3x6 Socket Head Screw
10mm Intermediate shaft.
M3x6 Socket Head Screw
M4x10 Socket Head Screw
Long idler pulley post
Install the long idler pulley post
with the M4 screw.
Post in place.
Install the pulley using the M3
screw.
CONICAL PULLEY
Install the side plate with four
M2.5x8 or 10mm socket head
cap screws.
Attach the conical pulley to the
shaft with four M3x6mm socket
head cap screws.

Page: 6 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
PLATE PILLARS
Install the four Pillars as shown
using the M4 screws.
MAIN ONE-WAY PULLEY
Slide the intermediate shaft into
the one-way clutch main pulley.
Notice the side that goes into
the conical pulley.
Use light oil to lubricate the
one-way bearings.
Slide the 1mm bearing spacer
onto the intermediate shaft.
Plate Pillars (4)
M4x8 Screw (4)
37T Conical Pulley
Intermediate Shaft
61T Main One-Way Pulley
1x10x12 Bearing Spacer

Page: 7 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
17T PINION
Insert the 17T helical pinion
and install the M4 screw and
locknut.
This screw needs to be tight-
ened very hard.
WARNING! Make sure the top
side of the locknut is at and
parallel to the top of the pinion
otherwise there will be bind-
ing when the top servo plate is
installed.
Before you install the top servo
plate the intermediate shaft will
have lateral play. That is normal
Boom Clamps
Install the clamps as shown but
don’t tighten the screws that
hold them against the plates
yet.
Temporarily insert the boom in
place to be used for alignment.
Lightly tight the clamps around
the booms while still allowing
the boom to rotate.
Now that the boom clamps are
aligned tighten the screws that
hold the clamps to the plate.
This guarantees that the clamps
won’t mar the boom when tight-
ened. After this is done remove
the boom again.
M4x18
17T Helical Pinion
M4 Locknut
!
M4x10 Socket Head Cap Screws (4)
M4x12 Socket Head Cap Screws (2)
Before you install
the top servo plate
this shaft will have
lateral play. That is
normal

Page: 8 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M3x8 Button Head Screw (11)
Servo posts installation
Install the Servo posts, CCPM
Guide Post and the Eleva-
tor Servo Bushing post using
the eleven M3x6 round head
screws provided.
It’s strongly recomended to use
a servo at this point to size the
spacing of the sliding servo
posts and centering of the servo
arm screw with pin into the
bushings.
HARDWARE BAG CONTENTS
Qty Description
2 - M3x6mm Round Head Screw
17 - M3x8mm Round Head Screw
4 - M3x8mm Socket Head Cap Screw
1 - M3x12mm Socket Head Cap Screw
4 - M4x8mm Socket Head Cap Screw
1 - M4x24mm Shouldered Screw
1 - M4 Locknut.
Step 2: Top Servo plate assembly.
!
Note: Use one of the
servos to set the location
of the sliding servo posts
as well as the center arm
screw with pin into the
bushings.

Page: 9 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M3x8 Button Head Screws (6)
M4x24 Shouldered Socket Head Cap Screw
M4 Locknut
Main gear assembly
Using a suitable wrench align
the gear holes and the gear hub
threaded holes and slide the
gear hub in place.
Install the six M3 screws that
hold the main gear to the gear
hub.
Installing the main shaft
Slide the main shaft into the
hub and insert the shouldered
screw in place.
Notice that the hole used here
is the one that’s farther away
from the shaft end.

Page: 10 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M4x8 Socket Head Cap Screw (4)
M3x12 Socket Head Cap Screw
Note: Use Blue Loctite both
in the screw and the collar
inner wall.
Top Servo Plate assembly
Attach the Top Servo Plate to
the Bottom pillars using four
M4X8 screws.
Main shaft collar
The collar allows the main shaft
to be held in place precisely by
sandwiching the two main shaft
bearing mounted on the plate
between the main gear hub bot-
tom and the shaft collar.
In order to secure it even more
use blue loctite as extra insur-
ance.
That being said the main gear
hub is also held in place se-
curely because it’s itself sand-
wiched between the bottom
plate bearing and the top servo
plate bearing.
This gives redundant security
but the collar is the one that
gives precision.
Spread a drop of blue loctite
inside the collar and wipe any
excess so that it won’t contami-
nate the bearing.
Install the collar and press the
main shaft into the bearing
while pressing the collar into the
opposite bearing so that there
is no up-down play left whatso-
ever.

Page: 11 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M3x8 Socket Head Cap Screws (4)
M3x6 Button Head Screws (2)
Carbon Fiber CCPM Guide
Main Shaft Top Round
Bearing Block
Slide the Main shaft top round
bearing in place.
Install the four M3 socket head
cap screws.
CCPM Guide
Slide the swashplate in place
and align the CCPM guide pin
toward the front.
Install the CCPM guide carbon
plate with the M3x6m round
head screws.

Page: 12 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
HARDWARE BAG CONTENTS
Qty Description
4 - M3x20mm Round Head Screw ( Landing Geear )
4 - M4x5mm Setscrew ( Landing Gear )
1 - M4x4mm Setscrew ( Hex starter Adapter )
4 - M3x14mm Round Head Screw ( Starter Shaft Block )
1 - E-Clip ( Starter Shaft )
1 - 6mm ID x 0.3mm Spacer ( Starter Shaft )
2 - M3x16mm Round Head Screw ( Starter Shaft Block )
2 - M3 Threaded Inserts ( Canopy Screws )
4 - M2.5 Threaded Inserts ( Throttle Servo )
2 - M3 Washer ( Slider Plate )
10 - M4 Washer ( 4 Slider Plate, 4 Motor Mount, 2 RPM Sensor )
6 - M3x25mm Socket Head Cap Screw ( 4 Fan Shroud, 2 Tank
side plate )
11 - M3x8mm Socket Head Cap Screw ( 6 Fanshroud, 3 LG Mini
blocks, 2 Canopy Posts,
Middle Stiffener plate )
11 - M3x10mm Socket Head Cap Screw ( 2 Slider Plate, 9 Rein-
forcer Plate )
44 - M3x6mm Round Head Screw
12 - M3x8mm Round Head Screw ( Monoblock attachment )
11 - M4x8mm Socket Head Cap Screw ( 2 Clutch )
4 - M4x8mm Socket Head Cap Screw ( 4 Slider Plate )
8 - M4x14mm Socket Head Cap Screw ( 4 Engine Mounts, 4
Engine )
Step 3: Frames assembly.
M3x8 Socket Head Cap Screw
Canopy Post
Canopy posts
Install the canopy post in place
as shown using the M3x8mm
screw.
Repeat for the other side.

Page: 13 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M2.5 Threaded Inserts (4)
M3 Threaded Insert
M2.5 Threaded inserts
In the holes indicated place four
M2.5 threaded inserts on the
outside of the left frame and us-
ing an M2.5 and an M3 washer
insert the extra M2.5x8mm
socket head cap screw in place.
Once it’s in place use a wrench
and tighten it making them be
press-tted into place. Once in
place remove the screw and
washer. The insert is now in
place. Repeat for the remaining
inserts.
M3 Threaded inserts
In the holes indicated place
an M3 threaded insert on the
outside of the frames and insert
an M3x16 Round head screw.
Once it’s in place use a wrench
and tighten it making the insert
be press-tted into place.
M3 Threaded Insert
M3x16 Round Head Screw (2)

Page: 14 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M3x6 Round Head Screw (4)
Support Spacers (2)
Front Stiffener Plate
Install the support spacers us-
ing four M3x6mm round head
screws as shown.
Middle Stiffener Plate
Install the support spacers
using six M3x6mm round head
screws as shown.
Support Spacers (3)
M3x6 Round Head Screw (6)

Page: 15 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
Bottom Stiffener Plate
Install the support spacers
using six M3x6mm round head
screws as shown.
Battery Plate
Install the support spacers us-
ing four M3x6mm round head
screws as shown.
Support Spacers (3)
M3x6 Round Head Screw (6)
M3x6 Round Head Screw (6)
Support Spacers (2)

Page: 16 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
60mm frames spacers (2)
M3x6 Button Head Screw (6)
Left Frame assembly
Install the screws as indicated in this diagram.
Use Blue Loctite # 242 to secure all screws in place.
M3x10 Socket Head Cap Screws (4)
M3x8 Socket Head
Cap Screws (2)
M3x25 Socket Head Cap Screws (2)
M3x6 Button Head Screw (2)
13.5mm Spacers (2)

Page: 17 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M3x6 Button Head Screw (4)
Right Frame assembly
Install the screws as indicated in this diagram.
Use Blue Loctite # 242 to secure all screws in place.
M3x10 Socket Head Cap Screws (6)
M3x8 Socket Head
Cap Screws (2)
M3x6 Button Head Screw (4)
M3x6 Button
Head Screw (2)

Page: 18 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M3x20 Button Head Screw
M4x5 Setscrews (2)
M4x5 Setscrews (2)
Landing Gear
Install the landing gear with the M3x20mm round head screws.
Slide the landing skids in place and secure them with four M4 setcrews.

Page: 19 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
Clutch Stack Assembly.
1) Glue the liner to the Clutch Bell using
30 minute epoxy glue. Make sure both the
liner and the bell are coated with epoxy.
Press in place and clean any excess glue
with Alcohol before it cures and keep
pressure outwards around the liner until
it’s cured.
2) Using Green Loctite secure one of the
10x19 Bearings inside the sliding block.
3) Insert the hollow shaft with the longer
thread downwards toward the clutch bell.
4) Using Green Loctite secure the second
10x19 Bearings inside the sliding block
making sure it makes the hollow shaft not
have play in between the bearings.
5) Using blue loctite screw the Motor Pul-
ley in place onto the Clutch bell.
5) Using blue loctite Screw the hollow
shaft top nut in place by hand and then
screw the pulley-bell in place by hand.
Use a wrench to hold the top nut and
tighten the clutch bell tight.
6) Install the bearing spacer and the c-clip
in the starter shaft and slide into the bot-
tom of the bell.
7) Using blue loctite install the top bearing
bock using the four m3x14 button head
screws.
8) Install the Hex adapter with the M4
setscrew.
Use Epoxy GLue for Liner

Page: 20 Copyright 2014-2015 Avant RC. All rights reserved
Avant Mostro 700 Nitro
M3x8 Button Head Screws (6)
Installation of the Monob-
lock into the frames
Right Frame
Using six M3x8mm round head
screws afx the left frame to
the Monoblock as seen in this
picture.
Install also the M3x10 Screw
and washer to the Sliding Motor
Plate but do not tighten it yet.
Left Frame
Repeat the above procedure for
the right frame.
Sliding Stack Plate Tight-
ening
Loosen the four M4x10 screws
that hold the motor sliding plate.
Pull the motor forward tightly
with your hands and tighten
the M3x10 sliding plate side
screws.
After those are tight then tighten
the four M4 screws on the top.
IMPORTANT NOTE
Do not use any tools to wedge
in between the gears plate and
the sliding plate to increase the
tension of the belt. In the case
of Nitro engines there is no
need and it will make the sliding
plate bearings break prema-
turely which is not covered by
the warranty.
M4x10 Socket Head Cap Screws (4)
M4 Washers (4)
M3x10 Socket Head Cap
Screws (2)
M3 Washers (2)
Pull sliding plate forward with your hands
to tighten the belt. Make it hand tight.
Do not use tools to make it too tight.