On/Off switch failed resulting in crash
#1

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Well I lost my favorite Sunday plane (Tiger 2) due to the On/Off switch failing. I did my preflight check, taxied and when I gave it full throttle I lost communication from tx to rx causing the plane to go full speed down the runway into a metal post. I checked my rx battery voltage it was fully charged, so I connected the rx batt pack directly to the rx and got full response on all my servos. Plugged it back thru the switch (no response). So my question is the following: Is there a switch available that fails in the on position and not in the off position? I would hate to loose another plane or worst yet have someone get hurt due to a bad $4 switch.
Thanks
Ed
Thanks
Ed
#2

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I use the MPI Miracle switch /regulatoron larger planes.
www.maxxprod.com/mpi/mpi-21.html
Fromco has a few different types of Failsafe switches and I'm sure there are a few other manufactures
www.fromeco.org/Products/04FRCBADSW-420s/
They are electronic switches behind a normal looking slide switch. They also can be incorporated with a regulator (like the MPI) If the switch fails or the wires disconnect(not the main battery wire) the switch remains in the on position.
www.maxxprod.com/mpi/mpi-21.html
Fromco has a few different types of Failsafe switches and I'm sure there are a few other manufactures
www.fromeco.org/Products/04FRCBADSW-420s/
They are electronic switches behind a normal looking slide switch. They also can be incorporated with a regulator (like the MPI) If the switch fails or the wires disconnect(not the main battery wire) the switch remains in the on position.
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I always charge my batt pack outside the plane due to me having a small car and transporting planes with wings off....so batt is only in the plane at the field.....I also check voltage on it before every flight right before I do my pre flight check of controls..... Thank you for the links, I will look into those.
Best regards,
Ed
Best regards,
Ed
#5

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I run LiPo and LiFe batteries in the planes with "failsafe" switches and honestly , although there is a drain when idle like Andy stated ,I haven't had a problem or noticed any increase in charging times as I leave the batteries plugged in all of the time until I see they are ready to be charged again and I fly quite a bit. I'm sure it does drain them some and for a casual flier it would be a good idea to disconnect before storing the plane.
Good Luck. I'm sure you will find something.
Good Luck. I'm sure you will find something.
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I have always used 2 switches,2 Batts...........I never found the extra weight was a problem.....Tiger 2...Sig 4*40 ect all flew great on duel packs. You could run NoBS battery from Hangtime Hobby.............they have 2 battery leads so only the second switch is needed on a single pack,at lease the switch has a back up.
#7
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As posted above. I too have been using redundant power in my airborne equipment. I started using it about 1994 as I got into gas. I could see all the benifits, addapting it to my 40 glow stuff at the time. Was a good place to use up all the small factory switches at the time, and 600mah packs.
See attached. Great information from Hangtime Hobbies.
http://www.hangtimes.com/parallel_packs.html
-Snuts-
See attached. Great information from Hangtime Hobbies.
http://www.hangtimes.com/parallel_packs.html
-Snuts-
#8

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This has been a known issue in the pylon community for some time. The vibration our planes see causes cheaper switches to fail prematurely. Most use JR gold switches and mount them on rubber. This has cut down on occurance dramatically.
#10

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+1 on the JR gold switches
ORIGINAL: vicman
This has been a known issue in the pylon community for some time. The vibration our planes see causes cheaper switches to fail prematurely. Most use JR gold switches and mount them on rubber. This has cut down on occurance dramatically.
This has been a known issue in the pylon community for some time. The vibration our planes see causes cheaper switches to fail prematurely. Most use JR gold switches and mount them on rubber. This has cut down on occurance dramatically.