Abstract: A radio-controlled device is provided that has improved steering responsivity. The radio-controlled device consists of a transmitter, a receiver, and digital servomechanisms. A PPM signal format of signals transmitted from the transmitter is shown in FIG. 4(a). Signals having time widths (T1, T2, t3) proportional to displacements of a transmitter joystick are distributed to drive the servomechanisms. As shown in FIG. 4(b), the transmission side transmits, to a final channel CH3, a signal having a time width of T3 (=t3+R), being the sum of the time width t3 and a reset reference value R (Nt3?Nt1). The receiver side subtracts the reset reference value R, thus restoring it to the original time width t3. By adding the reset reference value R, the minimum value L3 of a signal in the final channel is larger than the maximum value V1 of other signal.

Abstract: A radio-controlled device is provided that has improved steering responsivity. The radio-controlled device consists of a transmitter, a receiver, and digital servomechanisms. A PPM signal format of signals transmitted from the transmitter is shown in FIG. 4(a). Signals having time widths (T1, T2, t3) proportional to displacements of a transmitter joystick are distributed to drive the servomechanisms. As shown in FIG. 4(b), the transmission side transmits, to a final channel CH3, a signal having a time width of T3 (=t3 +R), being the sum of the time width t3 and a reset reference value R (Nt3−Nt1). The receiver side subtracts the reset reference value R, thus restoring it to the original time width t3. By adding the reset reference value R, the minimum value L3 of a signal in the final channel is larger than the maximum value V1 of other signal.

Abstract: A method for controlling an engine for a model and a device therefor capable of improving throttle response. Feed of fuel to the engine is increased during acceleration of the engine and decreased during deceleration thereof. This permits a rotational speed of the engine to be smoothly and rapidly varied, to thereby reduce vibration of the engine and prevent knocking and breathing of the engine. Also, adjustment of a trim provided on a side of a controller leads to adjustment of a needle valve, so that the adjustment may be facilitated.

Abstract: A transmitter for a radio control system capable of highly facilitating the changing-over operation and constantly exhibiting desired control characteristics. The transmitter includes a plurality of main control elements which are controllable in directions relative to each other about a neutral point and control basic operation of a controlled unit, an auxiliary control element for selecting control characteristics of the main control elements, a first changeover element for changing over mechanically neutral of the main control elements, and a second changeover element operated when specific control characteristics of the main control elements are selected by the auxiliary control element, resulting in setting an electrically neutral point of an actuation section depending on the mechanically neutral point of the main control elements. The operation of the first changeover element causes the second changeover element to be changed over in association therewith.