Radiocommunications Class Licence (Radio-controlled Models)

1 Name of Class Licence

This Class Licence is the Radiocommunications (Radio-controlled Models) Class Licence 2002.

2 When Class Licence comes into force

This Class Licence comes into force on gazettal.

3 Definitions

In this Class Licence:

Act means the Radiocommunications Act 1992.

device compliance day, for a radiocommunications device used to control model aircraft, model landcraft or model watercraft, means the most recent of the following days:

(a) if the radiocommunications device was manufactured in Australia — the day the radiocommunications device was manufactured;

(b) if the radiocommunications device was manufactured overseas and imported — the day it was imported;

(c) if the radiocommunications device was altered or modified in a material respect — the day it was altered or modified.

29 MHz band means the frequency band greater than 29.72 MHz and not exceeding 30 MHz.

36 MHz band means the frequency band greater than 36 MHz and not exceeding 36.6 MHz.

Note For definitions of other expressions used in this Class Licence, see the Act, the Radiocommunications Regulations 1993 and the Radiocommunications (Interpretation) Determination 2000.

4 Revocation

For section 135 of the Act, the Radiocommunications Class Licence (Radio‑controlled Models), notified in the Gazette on 24 July 1996, is revoked.

5 Class Licence

(1) Subject to sections 6, 7 and 8, this Class Licence authorises any person to operate a radiocommunications device to control model aircraft, model landcraft or model watercraft.

(2) In sections 6, 7 and 8, radiocommunications device means a radiocommunications device to which this Class Licence applies.

6 Condition — interference

The operation of a radiocommunications device must not cause interference to the operation of radiocommunications services.

Note A radiocommunications device to which this Class Licence applies will not be afforded protection from interference caused by other radiocommunications devices.

A radiocommunications device operated under this Class Licence is generally not expected to suffer interference. However, a radiocommunications device to which this Class Licence applies may experience, from other radiocommunications devices, interference arising from the particular circumstances of the operation of the radiocommunications device to which this Class Licence applies.

7 Conditions — 29 MHz band or 36 MHz band

The operation of a radiocommunications device that operates in the 29 MHz band or 36 MHz band is subject to the following conditions:

(a) the radiocommunications device must operate on a carrier frequency in the 29 MHz band or the 36 MHz band, with a maximum EIRP greater than 300 milliwatts and not exceeding 1 watt;

(b) subject to paragraph (c), if the radiocommunications device is operated on a carrier frequency in the 36 MHz band, it may do so only on a carrier frequency obtained by using the formula:

;

where n is a whole number that is at least 1 and not exceeding 30;

(c) a carrier frequency using the formula specified in paragraph (b) may be used only for operation of a radiocommunications device that is used to control model aircraft or model watercraft;

(d) if a radiocommunications device is used to control model aircraft on a carrier frequency in the 36 MHz band, it may, in addition to being permitted to operate on a carrier frequency using the formula specified in paragraph (b), be operated on a carrier frequency obtained by using the formula:

;

where n is a whole number that is at least 1 and not exceeding 29.

8 Standards

If the device compliance day for a radiocommunications device occurs on or after the day on which this Class Licence comes into force, the radiocommunications device must comply with any standard applicable to it as in force on that day.

Note 1 The ACA wishes to make it clear that if a standard mentioned in this section is amended or replaced by another standard following the device compliance day for the radiocommunications device, the radiocommunications device need not comply with the amended or replaced standard.

Note 2 Section 5 of the Act defines standard to mean a standard made under section 162 of the Act.

MODEL AERONAUTICAL ASSOCIATION OF AUSTRALIA

The MAAA governs all model aircraft activity in Australia, co-ordinating the activities of the various State Associations, the requirements of the FAI and the numerous Government departments involved in regulating Model Aircraft activities in Australia.

The MAAA is therefore responsible for the safe operation of model aircraft in Australia as called for under the terms of responsible self-government in sporting activities. A vital part of the MAAA management structure is the Frequency Sub-committee. This group is responsible for examining and advising on all matters pertaining to frequency management within the MAAA umbrella.

Recently the Frequency sub-committee was asked to examine the feasibility of operating models on transmitters spaced 10kHz apart. This resulted in approval by the MAAA for 10kHz operation but under carefully controlled conditions. These conditions are summarised in the MAAA Frequency Directive No. 5. See the MAAA web page for details.

The tables and notes below list pertinent operational points and the approved operating frequencies within the legal Australian frequency bands.

MAAA APPROVED FREQUENCIES WITHIN THE CLASS LICENCE FREQUENCY BAND ALLOCATIONS.

Radio Controlled Model Aircraft can only operate legally in Australia on frequencies approved by the Australian Communications Authority. The frequency bands approved by the M.A.A.A. are 26.957 - 27.282MHz, 29.720 - 30.000MHz, 36.000 - 36.600MHz and 40.660 - 40.700MHz. It should be noted that the assigned centre frequencies for operation are at least 5kHz removed from the band edges. Frequencies other than those identified above are not recommended to be used at any field operated by the M.A.A.A., any State Association, Club, or any M.A.A.A. affiliated member. To do so may invalidate any insurance cover provided by the M.A.A.A.

Each of the frequency bands is divided into individual assignments of 10kHz, however, due to the limitations of some radio control equipment a frequency spacing of greater than 10kHz may be required in practice. The MAAA Frequency Directives contain operating procedures and testing requirements to allow operation of equipment at specified frequency spacings. It should be stated that to operate at 10kHz spacing, more stringent requirements are placed on the users. If those controlling a particular flying area cannot or do not wish to comply with the 10kHz operating requirements, they shall use a minimum of 20kHz frequency separation between operating transmitters. In addition, at a flying area where 10kHz operation is permitted, an individual may choose to operate with a 20kHz or greater separation between transmitter frequencies.

The following rules apply to radio control equipment used for the control of model aircraft and operated by affiliated members of the M.A.A.A.

The following frequencies are approved for the radio control of models in Australia. The use of the 36 MHz band is restricted to the radio control of water-craft and aircraft. The frequencies marked with an asterisk may by law, be used only for the radio control of aircraft.

27 MHz EQUIPMENT POLICY

1. INTRODUCTION The MAAA requires that any user of frequencies in the 27 MHz band complies with the requirements of the Australian Communications Authority (ACA) and the relevant Class licence, Radio communications (Low Interference Potential Devices) Class Licence 2000. This is available from the ACA and is posted on their web site http://www.aca.gov.au/

2. 2. REQUIREMENTS (a) This approval only applies to model aircraft that are electric powered weighing no more than 500g and having a power source of no more than 9 volts. (b) The only approved model frequencies are those that are not used by CB radio. See table below. (c) The radio equipment used shall be capable of inter-operating at 50kHz frequency spacing. (d) All normal M.A.A.A. disciplines including club membership, flight line, frequency control, and flying areas apply. (e) Acceptance of the use of 27 MHz is not automatic and clubs have final discretion as to whether to allow it at their flying fields. (f) Clubs that agree to the use of 27 MHz are required to have a frequency control system. A Silvertone© type system is preferred but, as there is no requirement for a bandwidth sensitive system, an alternative of a board with a peg for each frequency, which is removed and placed on the antenna of the transmitter when in use, would be acceptable.

29MHz

Channel No	Tx Frequency	Channel No	Tx Frequency
10	29.725	24	29.865
11	29.735	25	29.875
12	29.745	26	29.885
13	29.755	27	29.895
14	29.765	28	29.905
I5	29.775	29	29.915
16	29.785	30	29.925
17	29.795	31	29.935
18	29.805	32	29.945
19	29.815	33	29.955
20	29.825	34	29.965
21	29.835	35	29.975
22	29.845	36	29.985
23	29.855	37	29.995

36MHz

Channel	Frequency	Channel	Frequency	Channel	Frequency
601	36.010	621	36.210	641	36.410
602*	35.020	622*	36.220	642*	36.420
603	36.030	623	36.230	643	36.430
604*	36.040	624*	36.240	644*	36.440
605	36.050	625	36.250	645	36.450
606*	36.060	626*	36.260	646*	36.460
607	36.070	627	36.270	647	36.470
608*'	36.080	628*	36.280	648*	36.480
609	36.090	629	36.290	649	36.490
610*	36.100	630*	36.300	650*	36.500
611	36.110	631	36.310	651	36.510
612*	36.120	632*	36.320	652*	36.520
613	36.130	633	36.330	653	35.530
614*	36.140	634*	36.340	654*	36.540
615	36.150	635	36.350	655	36.550
616*	36,160	636*	36.360	656*	36.560
617	36.170	637	36.370	657	36.570
618*	36.180	638*	36.380	658*	36.580
619	36.190	639	36.390	659	36.590
620*	36.200	640*	36.400

Notes

1] The MAAA now permits 10kHz separation of adjacent transmitters but under very carefully controlled conditions. See the MAAA Frequency Directive for details. The new Silvertone Issue 7 Metric Keyboard (Yellow 25mm keys with wider spine) is mandatory for 10kHz operation. The old Imperial Issue 4 Keyboard (Blue 2” keys) must not be used for 10kHz operation.

2] To minimise the possibility of third order interference, pilots should stand at least three metres apart while flying their aircraft. An aircraft should not be operated closer than three metres from a transmitter other than its controlling transmitter.

3] Intermodulation in the receiver mixer arising from two transmitters spaced 450/460 kHz apart and operated simultaneously can occur in single conversion receivers of older designs. By and large modern 10kHz specified single conversion receivers are now relatively immune to this form of interference. However older FM receivers and certainly AM receivers may exhibit mixer intermodulation and therefore it is recommended where these types of receivers are in use, the Silvertone Keyboard be operated with those frequency slots above 645 be blocked off and Red keys used on the lower paired slots. See Issue 7 keyboard page for details. A simple field test will determine if this type of interference is present.