Banshee 700 User manual

© 2012 – Banshee Helicopters GmbH Page 1
!
1.!General)information)....................................................................................................)2!
1.!Equipment)recommendation).......................................................................................)3!
1.!Gear)assembly).............................................................................................................)4!
4.!Main)rotor)assembly)...................................................................................................)9!
5.!Tail)rotor)assembly)....................................................................................................)12!
6.!Chassis)assembly).......................................................................................................)16!
7.!Final)assembly)...........................................................................................................)21!
8.!RC)installation)...........................................................................................................)25!
9.!Video)tutorials)and)Links)...........................................................................................)31!
10.!Important)safety)information)..................................................................................)31!

© 2012 – Banshee Helicopters GmbH Page 2
1. General information
Technical features:
•3-speed belt drive
•Automatic tail rotor drive belt tensioner/-spring damper
•Main drive belt tensioner
•30 mm carbon-fibre, strutless, tail boom
•Straight swashplate linkage
•Extremely small, compact design with high torsional stiffness
•Centre of gravity close to the rotor plane
•Double (x 2 separate units) needle bearing clutch
Technical specifications:B
•Basic weight of the mechanics including canopy: 1,7 Kg´s
•All up weight with standard equipment (3xBLS452, 1xBLS251, Jive 120+ HV,
Pyro 700, BeastX, Maniac³710 mm, 115 mm tail blades, canopy): ~2950 g´s
•Main rotor speed: 1000-2300 U/min
•Variable reduction ratio between motor an main rotor:
o18Z !1 : 12
o19Z !1 : 11,37
o20Z !1 : 10,8
o21Z !1 : 10,28
o22Z !1 : 9,81
o23Z !1 : 9,39
o24Z !1 : 9
o25Z !1 : 8,64
•Ratio between main rotor and tail rotor: 1 : 5,54
•Battery cell size: Maximum 60 mm width and 60 mm height

© 2012 – Banshee Helicopters GmbH Page 3
1. Equipment recommendation
Motor
Only motors with 30 mm bolt circle possible!
Space for up to 65 mm outer diameter.
6S: Kontronik Pyro 650-65, Kontronik Pyro 700-52
10S: Kontronik Pyro 650-62, Kontronik Pyro 700-52
12S: Kontronik Pyro 700-52, Kontronik Pyro 800-48,
Scorpion HK 4525, 4530, 4535, 4540
14S: Kontronik Pyro 800-48
Controller
Kontronik Helijive 120 HV, YGE 160 HV, Kontronik Kosmik 200
Battery
6-14S 4000-5000 mAh (60 x 59 mm)
SP-Servos
Futaba BLS 452, Futaba BLS 156/175 HV, MKS HBL950 HV
Tail-Servos
Futaba BLS 251, Futaba BLS 256 HV, MKS HBL980 HV
Flybarless
Mini-V-Stabi, AC-3X, Microbeast
Tail rotor blades
Rotortech 95 -120 mm (light-weight)
1000-1900 RPM (3D): 105-120 mm
1900-2100 RPM (Extreme 3D): 105 mm
2100-2300 RPM (High-Speed): 95 mm
Main rotor blades
Flybarless between 690-720 mm with low-lead

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1. Gear assembly
General instructions prior to gear assembly.
All screwings have to be secured with Loctite medium strength threadlock. Please
degrease new screws before use. It is recommended to repeatedly check all thread-
ed joints in order to prevent any screw from becoming loose. In practice, hex screw-
drivers and wrenches of Wera or Wiha have proven to be suitable.
Start with the mechanical gear assembly. Screw the rear belt guide roller and the tail
belt guide pulley with a pan head bolt M4 x 16 (B-S08) and the rear belt tensioner lever
with a pan head bolt M4 x 20 (B-S04) to the bottom bearing plate. Place a thrust washer
4x8x0.2 (B-P04) between each of the bearings and the bearing plate. Please make sure
to position all components as shown in the pictures below.
Then screw the oil filled shock absorber with a pan head bolt with flange M3 x 8 (B-S09)
and the corresponding bushing to the rear belt tensioner lever.
B-S04
B-S08
B-P04
B-G23
B-S09

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Next, the main rotor shaft is connected to the main pulley 72Z. We recommend to put
a small amount of grease over the part of the shaft where the pulley will be mounted.
Slide the shaft with the drilling that is further away from the shaft end into the main
pulley so that it protrudes slightly past the pulley.
Make sure to tighten fast the main rotor shaft to the pulley with a M5 x 21,5 special
bolt (B-S03) and a hex nut M5 (B-S18). The nut is kept in place in the pulley by positive
locking.
Now connect the intermediate shaft to the tail pulley 48Z. Make sure that the tail pul-
ley is flush with the shaft end and that the grub screw M4 x 4 (B-S12) is vertical to the
flat spot on the shaft. Using a small amount of lubricant may facilitate sliding the shaft
into the pulley.
B-S03
B-S18
B-S12

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Insert the assembled intermediate shaft into the bottom bearing plate and fix it with
the intermediate shaft pulley 24Z as shown in the pictures below. Use a grub screw
M5 x 5 (B-S13) to tighten fast the intermediate shaft pulley 24Z. Place a thrust washer
10x16x0.2 (B-P02) between the intermediate shaft pulley 24Z and the bearing.
It is important to ensure that the grub screw is correctly tightened to the flat spot on
the shaft and that there is no axial play between the pulleys. In order to do so we
recommend you to slowly tighten the grub screw and slightly turn the pulley to test
the fit. For permanent hold tighten the grub screw carefully with a hex screwdriver.
Push the main rotor shaft downward into the bottom bearing plate. Place a thrust
washer 12x18x0.2 (B-P03) between pulley and bearing.
B-P02
B-P03

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For the assembly of the main belt, first mount the belt around the pulley 24Z of the
intermediate shaft and then put the main rotor shaft with the main pulley 72Z through
the bottom bearing plate. Once the main belt is mounted around both pulleys slide
both thrust washers (B-P02) and (B-P03) on the shafts. Before sliding the middle bearing
plate on the shaft, position the main belt tensioner in the guide slot provided. You
need to place a thrust washer 4x8x0.5 (B-P01) on each side of the main belt tensioner.
Before you do so, put some lubricant on both shaft ends of the main belt tensioner as
shown in the picture.
B-P02
B-P03
B-P01

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Continue with the assembly of the freewheel pulley 72Z. Slip two thrust washers
10x16x0.2 (B-P02) onto the intermediate shaft first. Before sliding on the freewheel pul-
ley lightly lubricate the intermediate shaft. Secure the freewheel pulley with a circlip
(B-G07) on the intermediate shaft. If both the tail pulley 48Z and the intermediate shaft
pulley 24Z are correctly assembled (no gap), you will find a minimum axial backlash
which is necessary for the smooth run of the freewheel. You need to expand the cir-
clip with special circlip pliers and then place it in the groove provided. You must not
expand the circlip too strongly since its secure fit will then no longer be guaranteed.
We proceed to the assembly of the dome bearing plate and the dome brace. In order
to avoid any twisting when assembling the chassis later on, temporarily screw the
dome brace without adding Loctite to the middle bearing plate and the dome bearing
plate. Use 4 cylinder head bolts hex M3 x 8 (B-S36).
The assembly of the gearing unit is completed.
B-P02
B-G07
B-S36

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4. Main rotor assembly
The main rotor is one of the most critical safety components of model helicopters.
Please proceed with caution.
Start with the positioning of the rotor head damping in the main rotor housing. First of
all, take the rotor head damping and add a small amount of lubricant in the area of
the rubber rings (B-R14). Then press it into the main rotor housing until it is flush.
Secure the rotor head damping with the cylinder head bolts hex M3 x 12 (B-S31) of the
SP-towing arms that are both tightened with one additional thrust washer 3x6x0.2
(B-P07) each.
Then screw the carrier ball joint heads to the SP-towing arms. Use cylinder head
bolts hex M3 x 8 (B-S36). Make sure that the SP-towing arms point in the right direction
as shown in the pictures below and that the preferred direction for clipping on the ball
joints is correct (lettering facing to the outside).
B-R14
B-S31
B-P07
B-S36

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Continue with the assembly of the rotor head. Degrease the hollow feathering shafts,
apply a small amount of Loctite and push them into the main rotor housing as far as
they will go (!). If it is difficult to push them in you can use a vise carefully. Please
ensure that the side with the smaller shaft diameter is facing outward. Remove any
excess Loctite.
Repair information: You can disassemble a bent feathering shaft after a crash with
a small hand vise or a pipe wrench. The needle bearings are usually crash-resistant.
!
Now slide the special blade holder spacer made of Delrin (B-R09) on the shaft. Apply a
small amount of lubricant on the feathering shafts before sliding the blade holder with
the pre-assembled needle bearings on the feathering shafts. It might be a little bit
difficult to move it on the shaft. This is normal and will cease after the first few flights
once the shaft has been polished in the area of the needle bearings. Subsequently,
the blade holder will run smoother, too. This does not have an impact on the flight
characteristics and may therefore be disregarded.
B-S24
B-R09
B-R07

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After having mounted the blade holders, grease the thrust bearings 10x18x5,5 (B-L05)
and insert them with a tilting movement in the right order into the blade holder. As is
common practice, place the thrust with the smaller outer diameter at the outer side.
Secure the blade holder, i.e. the feathering shaft with high-strength M8 titanium allen
bolts (B-S24)in the main rotor housing. Before doing so double-check whether the
blade holder grips are well positioned. Be sure to apply Loctite medium-strength onto
the front part of the bolts and tighten them evenly.
The assembly of the rotor head is completed.
B-S24
B-L05
B-R01

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5. Tail rotor assembly
The picture above illustrates the assembly of the tail rotor. Lightly grease the thrust
bearing 5x10x4 (B-L06) and slide it on with the smaller side (smaller outer diameter)
facing outward. Similar to the assembly of the main rotor head, insert the thrust bear-
ing and the outer ball bearing with a tilting movement.
Repair information: Should the ball bearing 5x10x4 (B-L14) be damaged due to a
crash you can easily knock it out with a smaller shaft. Lightly heating the blade hold-
ers facilitates exchanging the ball bearings.
Warning: Make sure that the bearings and the thrust washers are correctly posi-
tioned. Otherwise the blade holders may clamp during operation resulting in a failure
of the tail rotor.
B-L14 ball bearing 5x10x4
K
B-S35
B-P09
B-P05
B-L14 ball bearing 5x10x4
K
B-L06 thrust bearing 5x10x4
K

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Continue with screwing the tail rotor hub to the tail rotor shaft. Fix the hub on the
shaft with a grub screw M4 x 4 (B-S12). Make sure that the grub screw is exactly placed
on the flat spot of the shaft and that the tail rotor shaft is flush with the tail rotor hub.
Now slide the blade holders on the tail rotor hub and screw them together with cylin-
der head bolts hex M3 x 6 (B-S35) and the thrust washers 5x8x0.5 (B-P05).
Screw the Delrin feedback levers to the tail pitch assembly. The pre-assembled
feedback levers of the tail rotor come with a ball and two flange bearings 2x5x2,3
(B-L01) already inserted. Take two cylinder head bolts hex M2 x 8 (B-S26) to screw the
feedback levers through the M2 balls to the tail pitch assembly.
Push the tail pitch assembly on the shaft and screw it to the blade holders with two
cylinder head bolts hex M2 x 8 (B-S26). Make sure the Banshee Helicopter logo is fac-
ing outward.
B-S12
B-P05
B-S35
B-S26
B-H05
B-S26

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Continue with mounting the tail rotor housing on the tail boom. The boom has pre-
drilled holes. Apply some Loctite medium-strength around the boom end and push
the boom into the tail rotor housing as far as it will go. Align with the drillings. Wipe off
any excess Loctite.
Repair information: If you want to disassemble the housing you need to heat it with
a heat gun to loosen the Loctite. Then put a cloth around the hot rotor housing and
remove it from the tail boom.
Be sure to strictly adhere to the indicated order for the following screwings. Screw the
bellcrank bracket to one side of the tail rotor housing using a cylinder head bolt hex
M3 x 8 (B-S36) and align with the second through-hole. Repeat for the tail fin using a
cylinder head bolt hex M3 x 6 (B-S35) on the opposite side of the tail rotor housing. Put
a cylinder head bolt hex through each through-hole and secure with a hex lock nut
M3 (B-S19) in the tail boom. Use a cylinder head bolt hex M3 x 10 (B-S30) on the side of
the bellcrank and a cylinder head bolt hex M3 x 8 (B-S36) on the side of the tail fin. You
can use either needle-nose pliers or a ring spanner to tighten the hex lock nut. We
recommend to apply a small amount of Loctite medium-strength on the screws.
Pull the tail belt through the tail boom without crimping it.
B-S30
B-S36
B-S36
B-S35
B-S19
B-S19
B-S12
B-S35

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Now press the tail pulley into the tail rotor housing and push in the tail rotor shaft. Be
sure to place the grub screw M4 x 4 (B-S12) exactly over the flat spot on the shaft and
to carefully tighten it. Set the distance between tail rotor hub and tail pitch to 11 mm.
The flat spot on the shaft allows for some play for adjustment. In a next step, screw
the tail bellcrank to the according support with a cylinder head bolt hex M3 x 14
(B-S32).
!
Push the tail push rod guide rings on the tail boom and align them evenly. You will
find pre-assembled rubber rings in the tail push rod guide rings that reduce noise and
wear. Grease them for an even higher elasticity. Then slide on the pre-assembled tail
push rod (B-H12)and tighten it with a ball joint M2,5 (B-D18). Do not clip it on the tail bell-
crank yet. It will later be used to align the bellcrank while the tail servo is in a neutral
position, so that the tail rotor blades are positioned at 0 degree.
The assembly of the tail rotor is completed.
11mm
B-D18
B-H12

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6. Chassis assembly
Start with preparing both chassis plates. The right chassis plate has one drilling hole
for mounting the rear belt shock absorber and two drilling holes for adjustment of the
main belt tensioner.
Screw the ball stud (B-D21) for canopy fixation to the chassis with a hex nut (B-S15). Di-
rectly secure the cylinder head bolt hex M3 x 14 (B-S32) used for tightening the rear
belt shock absorber with a hex lock nut M3 (B-S19).
Likewise, screw the ball stud (B-D21) for canopy fixation to the chassis with a hex nut
M3 (B-S15) on the left chassis plate.
B-S32
B-S15
B-D21
B-S19
B-D21
B-S15

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Take the finished gear unit, place the right chassis plate on it and push the rear belt
shock absorber onto the prepared screw. Tighten and secure with a hex nut M3
(B-S16). Lightly tighten the remaining 16 cylinder head bolts hex M3 x 6 (B-S35) on both
sides of the chassis. Once the chassis has been fixed on both sides, tighten fast all
screws. This helps to prevent any tension in the area of the gear unit and ensures
that all bearings are running smoothly and freely. Tighten the main belt tensioner with
two cylinder head bolts hex M3 x 12 (B-S35).
Be sure to fasten tight the dome braces that had only been provisionally fastened in a
previous step. Apply Loctite medium-strength.
!
Continue with slipping the silicone tubing over the chassis connectors. We recom-
mend to wetten the chassis connectors with some dishwater. Use a cutter to cut off
the overlapping ends of the tubing. One of the connectors remains without silicone
tubing.
B-S16
B-S35

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Now continue with the landing gear. Screw it with 4 landing gear mountings (B-C17)
and 4 countersunk head cap bolts hex M4 x 25 (B-S21) to the chassis and two covered
chassis connectors. Apply some grease on the landing gear mountings to facilitate
assembly.
Screw the other two covered chassis connectors to the chassis with pan head bolts
M4 x 6 (B-S06). Insert the controller platform into the slots provided, as indicated in the
pictures. Then screw the last remaining chassis connector to the chassis below the
controller platform.
!
Proceed with the cross-bracing of the tail boom clamps. You need 4 cylinder head
bolts hex M3 x 5 (B-S34). For the time being, screw the bolts only lightly to avoid any
tension.
B-S21
B-C17
B-S06
B-S34

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Insert the tail boom clamps completely into the chassis. Use 6 cylinder head bolts
hex M3 x 6 (B-S35). To clamp the tail boom take two cylinder head bolts hex M3 x 40
(B-S33), push them into the through-holes on the right-hand side (seen from behind)
and tighten them. Once the tail boom clamps have aligned themselves with the chas-
sis, tighten fast the cross-brace.
!
Pre-assemble the independent RC-unit. This platform serves to mount the elevator
servo, tail servo, FBL, receiver and BEC, in case there is one to install. You need 4
cylinder head bolts hex M3 x 5 (B-S34).
B-S35
B-S33
B-S34

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Fit the RC-unit into the chassis. Use 6 cylinder head bolts hex M3 x 6 (B-S35). Do not
necessarily use Loctite to fasten since you need to unscrew the bolts when mounting
the RC-equipment later on. Slide the swashplate onto the main rotor shaft. Then
place it with the ball stud with pin into the swashplate antirotation bracket. Screw it
with two cylinder head bolts hex M3 x 8 (B-S36) to the elevator servo mounting.
B-S35
B-S36