User manual FUTABA GV-1

[. . . ] GOVERNOR FOR MODEL HELICOPTER GV-1 INSTRUCTION MANUAL Thank you for purchasing a Futaba GV-1 governor. To ensure safe use, please read this manual thoroughly before using your new governor. After reading this manual, store it in a safe place. FOREWORD The GV-1 is an engine governor for model helicopters. The governor automatically maintains constant rotor R. P. M. due to load changes (reaction to torque) by suppressing variations in the engine speed. [. . . ] (Note: The closer to 100% ATV is the best condition) -Always set the stop point to a position lower than the idle point. If the stop point is set to a position higher than the idle point, "-ERR-" will be displayed. If this occurs, set the stop point to a position lower than the idle point and reset the throttle limit. Rotor gear ratio setting (Rotor gear ratio input) 1 Call the "rotor gear ratio" screen 2 with the FUNC+ or FUNC- KEY. Notes: Input the gear ratio -If the gear ratio is not properly set, the set from the DATA+ or speed and actual engine speed will be different. DATA- key. Rotor main gear N1 The rotor gear ratio can be input in 1/100 steps. Engine pinion gear N2 -The gear ratio should be given in the helicopter instruction manual. If the helicopter instruction manual does not give the gear ratio, calculate the gear ratio as follows: Gear ratio = N1/N2 FUNCTIONS Carry values less than 1/1000 to the next whole number. Speed setting (Set at control amp) Three speeds can be set. This is standard when the speed is switched by 3position switch. A 2-position switch and a VR channel can also be used. 1 Call the "speed set-up" screen with the FUNC+ or FUNC- key. (When switch used) (When VR channel used) 2 Set the switch to the de- 2 Set the variable resistor sired position and set the speed with the DATA+ or DATA- key. 1 3 points 2 can be set 3 Center knob to the fully counterclockwise, center, or fully clockwise position and set the speed with the DATA+ or DATA- key. 3 points can be set Counter clockwise Clockwise Set the speed of each point by repeating step "2". The set points can be verified at "rSx" (x=1, 2, 3) of the display screen. Note: When the speed setting channel travel (ATV, AFR) is made 20% or less, points 1 and 3 cannot be set. Speed setting points The engine maximum speed range limits the maximum speed setting. Test fly the helicopter with the governor turned off and tach the main rotor R. P. M. that can be achieved with the engine and pitch setup that you are using. Please set the governor maximum speed to approximately 50 R. P. M. 's less. (Example: If 1800 R. P. M. 's is max then set governor to 1750) The maximum speed can be verified at the MAX. speed display, however this could show some unlocked main rotor condition which is not accurate. Speed FUNCTIONS Reference The transmitter ATV function can also be used to change the point 1 and point 3 speed settings to a certain extent. The amount of this change is proportional to the difference between the point 1 and point 3 set speed and the point 2 set speed. For example, if point 1 is set to 1300rpm and point 2 is set to 1500rpm, and the transmitter ATV is changed from 20 to 100%, the point 1 speed will change from 1460 to 1300rpm. The transmitter ATV function has very little effect on the point 2 speed setting. Point 3 rs3 Point 2 rs2 Point 1 rs1 Neutral Speed setting channel travel The speed changes linearly on a line connecting points 1, 2, and 3. Governor ON/OFF operation mode setting A. When governor turned on and off by on/off switch 1 Call the "governor on/off switch position set-up" screen with the FUNC+ or FUNC- key. 2 Operate the ON/OFF switch and verify the ON/ OFF directions at the LCD display. 3 Use the DATA+ or DATA- key to change the switch ON/OFF directions. Reference FUNCTIONS When you do not want to turn off the governor at the slow position of the throttle stick to perform inverted flight, rolls, and other aerobatics, select INH at the "governor ON/OFF stick operation set-up" (StSw) screen. B. When using together with speed setting switch (When using the mixture trim function and when there is no vacant channel) 1 Call the "speed set-up" screen with the FUNC+ or a FUNC- key. 2 Set the switch to the position to be used as the off position and set the speed to 1000rpm or less with the DATA+ or DATA- key. 3 "off" is displayed and the governor can be turned off at that position. C. When linked with throttle stick (When there is no vacant channel) 1 Call the "governor on/off stick operation set-up" screen with the FUNC+ or FUNC- key. 2 Switch the display from INH to on/off with the DATA+ or DATA- key. When the stick switch is operated, the display switches from "off" to "on" and the switching point can be checked. 3 When the throttle stick is set 15% or less from the slow side, the governor is turned on. FUNCTIONS Until the start of flight, keep the governor in the off state with the throttle stick at 15% or less from the slow side. This is the engine starting, etc. If the throttle stick is set to the ON position when the engine speeds exceeds 70% of the set speed, the governor will be unintentionally turned on. Battery fail safe setting Always perform battery fail safe setting at the governor. When used, the governor controls the throttle. [. . . ] "INH" disables the mixture trim function. To use the trim function, set MTrm to "ACT" and connect the AUX (m. trim) connector to the vacant channel you want to use. Trim operates when the mixture servo is above the neutral position. Adjust the trim servo travel with ATV of the transmitter AUX channel. (Setting method) 1 Set the mode by pressing the DATA+ or DATA- key. (Initial value) INH Functions priority The "mixture trim" and "governor ON/OFF switch position setting" functions cannot be active at the same time. [. . . ]