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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Smart-Fly (Quest Engineering) Support Forum >> Possible cause of crash
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Possible cause of crash - 7/4/2005 7:37:08 AM   
rcblimppro



Posts: 514
Joined: 2/9/2003
From: San Jose, CA, USA
Status: offline 		Bob, I recently lost a 38% Extra for unknown radio loss. After reading some of the posts here I think I have a scenario. I was running 2 4000 mah li-polys and regulators plugged directly into the RX. I have read in several posts that the regs don't like to be set up this way and one will always dominate. What I think happend and what I am seeking your opinion on is that it appears to me that one reg was dominate supplying power to the RX and servos. I was one flight away from having to re charge. The failure occured right after a 1 1/4 snap on a downline. What I think happened is that the doniate reg heated up and shut off. The only hole in this theory is that the other reg should have kicked in and kept the power flowing to the RX. Obviously by getting one of your Batshares it would solve this problem. I am strongly considering one of the power expanders as well. I just don't want to repeat the loss of another airplane.


Shawn
       Post #: 1

RE: Possible cause of crash - 7/4/2005 2:42:37 PM   
rrritchey


 

Posts: 622
Joined: 9/29/2004
From: Phoenix, AZ, USA
Status: offline 		Hello Shawn,
A pilot in my area had the same thing happen running a similar setup. He was not using my regulators and the ones he had were too small to be used alone. He got about 5-6 flight and then noticed that the plane got sluggish and then shortly there after he lost complete control. He came to the same conclusion that the dominant regulator heated up, failed or shut down and then the other regulator took over but could not handle the full load and that was that. I would ask if your plane got sluggish first and then completely lost it. Anyway, if you use the BatShare you need to make sure the regulator you have can handle the full load. Another option is our SuperReg which has a BatShare built in with a 7.5 amp regulator and a failsafe switch and was buit to be a companion to our PowerExpander. Its terrible to loose a plane (unless you are lucky enough for a full ride and don't care) and there is no way to guarantee 100% redundancy but if your regulator is big enough to handle the load (and this means good heat dissipation, not just a 10 amp rating) then the two most common failures are the batteries and switches (or associated wiring) with regulator and receiver failure way, way behind these. This is why we built the SuperReg and TurboReg, regulators that can handle the load required and provice battery backup and failsafe switch protection.
Please let me know if I can be of any further assistance.


_____________________________

Robert Ritchey
Owner, Smart-Fly

(in reply to rcblimppro)
       Post #: 2

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All Forums >> Radios, Batteries, Clubhouse and more >> RC Radios, Transmitters, Receivers, Servos, gyros >> Radio Manufacturer Direct Support >> Smart-Fly (Quest Engineering) Support Forum >> Possible cause of crash
Page: [1]





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