Abstract: A measurement device for measuring and adjusting at least one control element of a model helicopter includes an electronic measurement unit (2), and a fastening unit (7) which is or can be connected rigidly to the electronic measurement unit (2) and which is to be mounted on the control element to be measured. To make available a measurement device with which other control elements of a model helicopter can be measured and adjusted, the measurement device (20) is provided for measuring and adjusting the tilt of a swash plate of the model helicopter. The fastening unit (7) can be placed flat at least in some areas on the top and/or the bottom of the swash plate.

Abstract: A charging device controls charging of rechargeable batteries or accumulators (4), which include individual cells (4), having a charging unit (2), by which electrical energy can be applied to the individual cells (5) during the charging procedure. A control unit (3) is used to control the procedure of charging the accumulator (4). A balance controller is used to balance the charging and/or discharging of the individual cells (5) of the accumulator in relation to one another. A connection device is used to electrically connect the cells (5) to the charging device (1) in a detachable manner. The charging device (1) is equipped with a wireless ID reader, which makes it possible to wirelessly read the ID (identification) of an accumulator (4) equipped with an ID label, and a data file (11) for each ID can be generated in the charging device (1).