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Petrel Battery Advice

Anything to do with gliders & gliding.
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spike spencer

Re: Petrel Battery Advice

Post by spike spencer »

Neat switch units. However, on looking closer at the HK images (and lack of Current handling specs from that supplier) ... It may just be a personal paranoia, but I feel uncomfortable with DPDT switches where both Pos and Neg leads are switched; there is then TWICE the probability of failure (in each battery line) for the specified Current Rating.
Much more reliable to connect the two switch poles in parallel on their respective Red leads. If one contact fails or shows high resistance, the other will continue to supply power.
Also, by sharing current between them, contact stress is significantly reduced, promoting longer life. If I remember correctly, Power losses [I2R]at the contacts are proportional to the Square of Current !

"Airworthiness is juggling the odds as far in your favour as reasonably possible" :geek:
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