Hi,
noox89:
Will elaborate asap on interesting issue. For now:
1) Several factors to consider when estimating probabilities: Fuel type, Antenna type, Power output (maximum at LOUD voice), Aircraft type, Aircraft condition, Refueling equipt. and condition, Temp, Dew point, etc.
2) In general the probability to fuel ignition i consider very low (Jet A-1).
3) On mobile or HT's (VHF/UHF) their batteries could be dangerous. (e.g. LiPo). Not the RF due it's lower out power.
I operated HF (high power) mobile (land) since 1970 in practically all possible situations and configurations (testing different antennas) and would say: I would avoid to key PTT during (ground
) refueling. Only if necessary. But IMO the risk of fire (in general) is low.
I will comment (tech. aspects involved) like "parasitic resonance" of nearby structures.
The FCOM mentioned i understand as a standard to simply put chances at zero.
HF keying when refuelling represents fire hazard?
Interesting question and will have pleasure to comment the many aspects involved.
Mac
PS
Machinbird:
Would like to study a little bit on this case. Position of A/C in respect to nearby HF poles, HF power output (Certainly > 1KW), location of the probes, etc.
The presence of strong RF fields could sometimes be verified by the sparks playing on the links of the tiedown chains at night.
Structures may resonate and develop High Voltages (and flash)
PS2
On RF issues i remember the EA6B canopy (gold shielded) because the jamming antenna behind.
PS3
There is A LOT of myths in this issue. Even among EE. This is an "analog" field and the feeling of the technicians are decaying due the "digital age". Few people really has expertise on the issue. The comment of
Avtrician certainly comes from an expert.
PS4
Let's look.
PS5
PS6
bubbers44
On "dumping", (jetisoning) a TACAMO (with it's 30,000 ft trailing wire) fed by the 5,000 ft "exciter" should not, indeed.
(200,000 Watts RF power
)