Had to replace the fuel pump in my car, so I thought i might as well tear down the previous one. Picrel.The second part from the bottom is the impeller. The third part is the rotor. Fourth part are the two brushes.Yes, mind it is a brushed motor.Yes, brushed motors arc.Well, that's ok, because the petrol just flows through the motor . That means no oxygen at the arcing spots. That means no risk of explosion. Right?What if the tank is almost empty and the pump is pumping a mix of liquid and gases?Well, that's fine because all the gases inside the tank are actually petrol in the gas phase. Right? So, still no risk of explosion, right?What if, at this point, someone opens the tank? Air goes inside, right? The pump is pumping gas and liquid, right? Air has oxygen, right?Still no risk of explosion?
>>2945725>Still no risk of explosion?Correct. The air-fuel ratio is too rich to support combustion.TWA800 was just Boeing covering up for (their major customer's) fuckup firing a missile.
>>2945728Can't tell if you're being sarcastic or not.I didn't know what TWA800 was, so went and read the wikipedia page.They say that a combustible fuel-air mixture always exists is fuel tanks
Fuel pumps have been built this way for like 75 years. In that period of time, how many times do you think brush-to-contact arcing has caused an explosion? It's fine.
>>2945734Have been driving for 30 years now. Now that I know I have a brushed motor inside the fuel tank, can't stop thinking about it every time I start the car
>>2945735That sounds like a personal problem that you need to get over. The first step in doing so is to stop being a pussy. And that's it. That's the only step.
>>2945738>stop being a pussyI have to admit it. I am kind of a pussy sometimes. This may be one of those times
>>2945733>They say thatThey say that now. But during the process of certification, don't you think anyone ever checked the possible vapor levels before running live wires through the tank?And then why do they still allow electric fuel pumps and level sensors inside automobile tanks? You don't see them blowing up every day. Or any recalls to fix a hazardous situation.
>>2945733>They say that a combustible fuel-air mixture always exists is fuel tanksAircraft mechanic here. nope.
>>2945735every car with an in tank fuel pump is brushed.
>>2945725Gas tanks are designed to never allow for the correct air/fuel ratio needed for combustion to occur. This is why a brushed fuel pump can be used.
