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24-11-2014, 07:55pm
If you are ever sitting at an airport where you can see the refueller at work, his first action is to reel out a wire from the bowser and attach it to the aircraft. This does two things; one it removes the electrical potential difference between the two vehicles and secondly it discharges the static that builds up as the fuel flows.
In the case of a normal servo, the moment that you bring the nozzle close to the fuel pipe is the issue, a spark may occur and if the vapour mix is right it might cause a fire.
The mobile phone thing is pure fantasy. The RF power is insufficient to do anything and its only the EXTREMELY unlikely chance that you might strike your phone with a mallet and cause the battery terminals to arc that there is any risk.
When using radios in a dangerous atmosphere they must be marked as 'intrinsically safe'. However that is nothing again to do with the RF, but again the minute chance that the terminals might arc.
In the case of a normal servo, the moment that you bring the nozzle close to the fuel pipe is the issue, a spark may occur and if the vapour mix is right it might cause a fire.
The mobile phone thing is pure fantasy. The RF power is insufficient to do anything and its only the EXTREMELY unlikely chance that you might strike your phone with a mallet and cause the battery terminals to arc that there is any risk.
When using radios in a dangerous atmosphere they must be marked as 'intrinsically safe'. However that is nothing again to do with the RF, but again the minute chance that the terminals might arc.
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