DB's Discussions (8)

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new vehicle design tool

Hi all,

I'm working on some software that helps you select components (batteries, ESCs, motors, propellers) for a quadrotor/airplane/hybrid/generic UAV given a particular mission. It's basically ecalc in reverse with some optimization. I'm hoping it w

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unexplained but repeatable quad crashing

Hi all,

Any ideas what might cause something like this?  I have a 250 quad that I've been flying around for a bunch of months at the same field.  I haven't made any changes (software or hardware) and suddenly the quad crashes every time I fly it.  I t

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APM 2.5 hangs on connect to MP

Hi all,

When I try to connect via USB, it hangs on "got param ...".  No errors, just sits there. Orange light blinks slower on the APM.  CLI factory reset works, firmware update works, but can't connect.  

While connecting:

Arduplane 2.76 freezes on got

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quad motors overheating and ESC calibration

Is there anything (barring motor thrust axes being misaligned) that would cause an opposing pair of motors to overheat?  I'm guessing my quad is fighting yaw because of opposing pair part.  Navigation looks fine so I don't think its a gyro or compass

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Sonar on APM 2.5

Hi all,

I connected and enabled a sonar to my APM2.5.  It works fine in CLI test mode.. but I don't see the altitude reading in the HUD matching the sonar data.  It looks like it bounces around "randomly" just using the baro data. Is there something e

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APM 2.5 current output capabilities

Hi all,Is there a spec for APM 2.5 maximum current output? I'd like to connect GPS, sonar, telemetry, and OSD at the same time but can't find anywhere if the hardware can power all those at the same time. I'm using ESC power or can put on a regulator

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LiPo degradation and motor performance

I've been flying a copter with a mix of new and old batteries and I've seen this several times.  It looks like the copter loses partial power to one or more motors, almost immediately after takeoff.  I'm wondering if the batteries have been improperl

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