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--- rc:flex-rc-mini-owl [06.09.2016 21:41]
vergo [Wiring plan]
+++ rc:flex-rc-mini-owl [19.06.2018 19:34] (current)
vergo
@@ Line 1: / Line 1: @@
 ~~NOTOC~~
-<note>build in progress</note>
+<note important>This quadcopter was dismantled on 19.6.2018 after 28 flights. I don't suggest making a copy of this setup. It's too heavy and underpowered as a result even after swapping the separate camera and vtx to a 2-in-1 combo. The custom prop size is also a pain especially when the prop breaks so easily. See [[rc:lantian-l90|Lantian L90]] for a better alternative in the same size class.</note>
 ====== Flex RC Mini Owl ======
+{{ :rc:files:miniowl:miniowl.jpg?direct&400|}}
 ^  Specifications  ^^
@@ Line 16: / Line 18: @@
 | Camera | Tarot 520TVL FPV 1/4" |
 | VTX | Hawkeye 5.8GHz 200mW |
-| Antenna | DYS 5.8GHz RHCP\\ (to be replaced with something shorter) |
+| Antenna | Foxeer 5.8G RHCP, mini version |
-| Battery | Turnigy nano-tech 450mAh 3S 65C |
+| Battery | <del>Turnigy nano-tech 450mAh 3S 65C</del>\\ Turnigy nano-tech 850mAh 3S 45C |
 ^ ^^
-| Weight | 129 g\\ 169 g (with battery) |
+| Weight | 131 g (without battery) |
-| Flight time | ? |
+| Flight time | around 4 minutes |
+===== Videos =====
+  * https://www.youtube.com/watch?v=LJ79Qe4efeY (2016, second fpv flight)
+  * https://www.youtube.com/watch?v=JYypZCnEt2E (2016)
 ===== Notes =====
@@ Line 42: / Line 49: @@
     * the buzzer pads marked in inversed polarity
     * the four motor pads may also be in inversed order
+  - MWOSD needs to be updated if it shows really have current readings when disarmed.
+    * The problem is caused by negative current sensor readings. Check scale and offset.
+  - Turnigy nano-tech 450mAh 3S 65C is the suggested battery by Flex RC.
+    * Not good in reality, produces low voltage warnings early in flight.
+    * Use Turnigy nano-tech 850mAh 3S 45C instead, even if a little heavier.
+  - The field of view of the camera is big enough not to require any uptilt.
+  - VTX video quality is rather bad even when flown outdoors and doesn't appear to be directly related to throttle levels.
 ===== Settings =====
-==== Betaflight (3.0.0) ====
+==== Betaflight (3.0.0 RC13) ====
   * Align board
@@ Line 62: / Line 76: @@
     * ''set current_meter_scale = x''
       * the correct value should be around 360-380 due to the value of the resistor
-      * something is causing high current to be reported once battery is connected
+        * these appear to give reasonable results at least with low rpm
-      * it remains to be tested if correct values are reported if offset is used
+        * ''set current_meter_scale = 690''
+        * ''set current_meter_offset = 98''
+      * the configurator is useless for calibration when usb is connected
       * possibly a flaw in fc design
   * No beeper when USB is connected

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