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[AeroElectric-List] Questions about circuit protection

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mrspudandcompany(at)veriz
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Posted: Wed Jan 06, 2010 6:09 am Post subject: [AeroElectric-List] Questions about circuit protection

Bob  

   

I really don’t want to resuscitate this discussion but, even being aware of the technical advantages of fuses versus circuit breakers, it is indeed almost impossible to convince a pilot that a fuse is better than a circuit breaker.  

In flight, when a fuse blows, the pilot will hardly notice it, and even if some device (whose circuit was protected by that fuse) becomes blank, he will not know if it was the fuse or anything else that caused that device to die.  

If a circuit breaker pops out, there is a big probability the pilot will immediately notice it, or at least after seeing any device die, he will immediately look to the circuit breakers heads to look for the one that popped out.  

Being a pilot trained for so many things, he must also know that he shall not push that particular breaker in, unless he wants to light up the fire which will burn his own ass…  

   

It is probably easy to convince an aircraft builder to prefer fuses, but since in the OBAM world we are builders AND pilots, circuit breakers are certainly much more user friendly for the pilot, even knowing that the PILOT is the most dangerous single-point-of-failure in a flying aircraft   

   

Carlos   	  Quote: 	
		     .Two simple examples: 1)   You are flying along in your airplane with circuit breakers, the radio goes dead, and a breaker button pops out.  What do you do?  Fly the airplane!!2)   You are flying along in your airplane with Fuses, the radio goes dead, and nothing else happens.  What do you do?  Fly the airplane!! 	
 	  Quote: 	
		  When you get on the ground you troubleshoot the problem.   If the added cost for the row of little buttons to pop out, on the dash, gives you a sense of security, I say GO FOR IT...... rOGER 	


  

        [quote][b]

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trigo(at)mail.telepac.pt
Guest

Posted: Wed Jan 06, 2010 7:09 am Post subject: [AeroElectric-List] Questions about circuit protection

[quote].Two simple examples: 1)   You are flying along in your airplane with circuit breakers, the radio goes dead, and a breaker button pops out.  What do you do?  Fly the airplane, knowing that something happened in the  electric circuit that is protected by that particular circuit breaker. If the radio (or anything else that went dead) is not critical to your flight, you complete it with no other worries2)   You are flying along in your airplane with Fuses, the radio goes dead, and nothing else happens.  What do you do?  Fly the airplane!! not knowing  what happened. Did I loose the alternator? Is there anything that is going to start a fire? What should I do? Should I land ASAP? Shall I declare an emergency? Next, anything can happen to the pilot, even panic When you get on the ground you troubleshoot the problem.  If it was a fuse, it can take some time to find out which. If it was a circuit breaker, I will go IMMEDIATELY to the source of the problem If the added cost for the row of little buttons to pop out, on the dash, gives you a sense of security, I say GO FOR IT...... I have 1 airplane with fuses, 1 airplane with cb’s, and the one I’m finishing building have both. Not biased, though… J  Only analysing pros and cons… Carlos  [b]

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