TR-SVMIX ;Tandem Roter Servo MIXer

GYRO

Muffler for 50class engine &
Wood roter

Muffler for 50 engine and wood rotors are included in this kit. This rotor can be used for 0406-902 32-46 Vertol and MRB-III 3 blade rotor head.

Black anomized aluminum flame

Engine

50 engine can be used (Not included).
This helicopter is shaft start.

What is a tandem rotor helicopter?
 

In tandem system, 2 rotors in front and rear counter rotates to each other to negate counter torque. Tandem is more efficient than tail rotor because 2 rotors are used to create lift.

How is Flight?
 

Elevator is unstable because elevator is most sensitive in tandem.
Rudder reacts slower than normal tail rotor.
For better scale looking, 3 blade rotor head is used.
Compared with normal head with stabilizer bar, tandem rotor head is less stable. Knowing tandem characteristics are important for flight. Also, this rotor head will be affected by wind. Flight in strong wind is very difficult. We recommend first flight and adjustment in calm day. Due to helicopter design, this helicopter cannot do any acrobatics like loop and roles.
 
During hovering, helicopter will look like below picture.

Rotor RPM
Rotor RPM should be about 1,500-1,600 rpm. With lower RPM, helicopter will be unstable and hard to control.
 
Gyro sensitivity
Gyro input should be same as data sheet in manual. Minor adjustment will be required during flight. Low gain will make helicopter unstable. High gain will cause hunching.
 
Flight in air
After hovering adjustment is completed and you feel comfortable flying this helicopter, try some turns in the air. If there is sudden stick move during forward flight, it can cause a stall. Rotor RPM in the air should be 1,600 - 1,700 rpm. High speed can cause sudden unexpected move. Be careful with orientation of this helicopter. It is very easy to lose orientation.