RobAlbania
Second Officer
Albania
Offline
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The cellphone interference is not propagated via radio receiver or transmitter, but instead couples directly (like interference from lightning) to computer devices and programmable memories and may cause the memories in programmable transmitters and receiving equipment (e.g. the computer controlled Inspire 2) to be altered or erased.
There is a long thread here that may provide further relevant information:
https://www.rcgroups.com/forums/ ... lphone-interference
Also the following press release from Multiplex following the crash of a turbine helicopter caused by Cellphone interference:
"MULTIPLEX Press Release
December 2004
Dear all,
MULTIPLEX is extremely sorry to hear of the unfortunate incident involving the gas-turbine helicopter in early October 2004. An immediate investigation was launched to ascertain the cause. We have also taken into consideration the BMFA Safety Bulletin No 6 relating to the use of mobile telephones in proximity to electronically programmed transmitters.
The UKRCC (earlier JRCUC) has reported there may be a problem associated with operating mobile telephones in close proximity of programmable transmitters causing memories to be partly or fully erased. This problem has yet to be scientifically substantiated, however, it is generally known that RF radiation can disable or permanently damage some modern electronic devices.
Although the risk may be small, we believe it should be minimised by bringing to the attention of RC pilots and clubs that pending resolution, we recommend that mobile telephones are not switched on within 10 feet of any programmable transmitter. This may appear to be ‘overkill’, but better safe than sorry. Care should be taken during pre-flight checks to ensure that all controls are operating effectively in their correct sense and to ensure that the memory has not been affected by any undetected or unknown transmission since the last flight.
The UKRCC (earlier JRCUC) pointed out that the International limit for radio control RF transmissions is restricted to 100 mW, this means that mobile telephone transmissions could be up to 30 times more powerful. Civil aircraft and hospitals etc. request all mobile telephones or similar electronic devices are turned off, and these are the reasons why MULTIPLEX points out in instruction manuals, particularly in the latest issue for the Royal evo, ‘Do not operate mobile phones within 2 meters (6 ft 8") of the transmitter’.
Care must also be exercised when modifying brands of radio equipment. The essential range test procedure, as clearly stated in every MULTIPLEX instruction manual, must be carried out. In extreme cases the manufacturer's warranty could be invalidated together with insurance.
Flair Products and MULTIPLEX dealers have been informed and are pleased to answer any questions.
The MULTIPLEX Team wishes you safe flying, but we need your assistance to make flying even safer!"
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