Manual
4
KIT INSPECTION
Before starting to build, inspect the parts to make sure they 
are of acceptable quality. If any parts are missing or are not 
of acceptable quality, or if you need assistance with assembly, 
contact Product Support. When reporting defective or missing 
parts, use the part names exactly as they are written in the 
Kit Contents list.
Hobbico Product Support
3002 N. Apollo Drive, Suite 1  Ph: (217) 398-8970, ext. 5
Champaign, IL 61822  Fax: (217) 398-7721
E-mail: airsupport@hobbico.com
PREPARATIONS
Before starting to assemble the Sensei, we recommend 
charging the motor battery. Then, when you are ready to set 
up the radio system, the motor battery can be used to power 
the receiver.
Charge the Battery
The following is an overview of how to charge your motor 
battery using the ElectriFly Smart Charger. If you are using a 
different LiPo charger, carefully follow the instructions included 
with the charger.
1. Connect the input power to the charger. The GREEN LED 
will be lit, indicating standby mode. The RED LED will be OFF.
2. Connect the battery to be charged to the balance plug. 
The RED LED will also be lit, and remain RED during the 
charging. Both LEDs should be lit solid while charging. 
3. If the battery was completely discharged, the RED and 
GREEN LEDs will start to fl ash after 2-hours and 40-minutes. 
The charger has a built in safety timer.
4. Disconnect the battery from the charger, wait for the GREEN 
LED to be lit, and then reconnect the battery to the charger. 
5. It will take approximately 1-1/2 hours more to complete 
the charge. When the battery is fully charged, the GREEN 
LED will turn OFF. Remove the battery from the charger 
at this time. 
6. Charging time depends on the level of discharge of the 
battery and if the battery cells were unbalanced.
LED SCHEME
Use this table to determine charge action.
RED LED
OFF
OFF
Solid ON
Solid ON
Flashing
GREEN LED
Solid ON
Flashing
Solid ON
OFF
Flashing
ACTION
No battery is connected
Conditioning battery
Battery charging
Charge complete
ERROR*
*Possible sources of battery error may include a highly unbalanced 
pack, charger timed out, or one cell of the pack which is low voltage. In 
the case of a battery error, please remove the battery pack from the 
charger and inspect it carefully for swelling or any other damage, such 
as broken wires.
Battery Charging Precautions
● Be careful to avoid overcharging the battery. Only use a LiPo 
approved charger. Never use a NiCd/NiMH peak charger. 
● Remember to check the temperature of the battery during 
the charge. The battery should not get hot. If it does, unplug 
the battery from the charger.
● Charge the battery at a maximum charge rate of 2.1 amps. 
A higher charge rate will cause the battery to get hot.
● Never place the battery on combustible material or leave it 
unattended while charging.
KIT CONTENTS
1. Wing Halves
2. Fuselage
3. Vertical Stabilizer
w/Rudder
4. Horizontal Stabilizer 
w/Elevators
5. Transmitter
6. Charger
7. LiPo Battery
8. Propeller
9. Main Landing Gear
10. Spinner
11. Wing Joiner
12. Wing Connector
Kit Contents
1
1
6
2
7
8
9
3
5
4
10
11
12










