Tech Model Products L.L.C.
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800 Village Walk # 172
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Guilford CT 06437
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www.techmodelproducts.com
Rev B 4/03/10
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The upper mixer arms are flipped and the balls are mounted on the opposite side. For the
plastic arms, a small amount of the plastic needs to be shaved off for clearance with the ball.
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The washout base is mounted upside down. For the metal version, the bushing needs to be
either trimmed (cut away) or pressed out and then pressed in on the other side. The other
option is to use the older style metal washout base that is symmetrical on both sides (Align
1143)
2. Attach the front rotor head to the front main shaft.
3. Verify that the front and rear heads are phased 90 degrees to each other.
4. Balance the front main blades using a blade balancer. Try to get them as perfect as possible since
this will reduce vibration. Leave the blades off for now.
12.
Electronics/Electrical - Assembly
Parts:
Qty:
Description:
N/A
1
Motor with mounting screws
N/A
1
ESC
N/A
1
BEC (5V 3.5amp minimum)
N/A
1
Yaw gyro
N/A
1
DCP gyro
N/A
1
Receiver
N/A
1
TH-2GP cont mount + extender
N/A
1
Deans micro connector set M/F
N/A
1
Deans Ultra connector set M/F
N/A
1
36" Servo extension Male
N/A
4
12" Servo extension Male
N/A
N/A
26 gage servo wire
N/A
N/A
22 gage stranded hookup wire
N/A
2
Ferrite ring
Note: Refer to the Twinn Rexx wiring diagram for the instructions below.
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ESC to motor
- The ESC outputs connect to the motor with bullet connectors covered with heat
shrink tubing. Mount the ESC up front close to the motor with it’s heat sink against the main frame
tube. The motor attaches to the motor mount with two screws and washers. Verify the mesh with the
main drive gear is smooth all around it’s circumference.
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ESC to receiver
- The ESC control input connects to the receivers throttle channel. The red power
lead must be removed from the connector housing and covered with heat shrink tubing or tape. This
is because an external BEC supplies power to all of the onboard electronics. Add a ferrite ring the
control lead if needed.
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ESC to battery
- The ESC power inputs connect to the battery with Deans ultra connectors. The
male end is on the ESC side.
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BEC to battery
- The BEC power inputs connect to the battery with Deans micro connectors. The
male end is on the BEC side. This is so the electronics can be powered without the ESC and motor.
This is convenient during set up. Mount the BEC up front near the ESC. The output of the BEC
should have a ferrite ring installed.
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Receiver -
Mount the receiver onto the rear of the frame away from the ESC, BEC etc. For safety, a
redundant power connection is made to the BEC output (5v). Use a spare channel if available or a