Why does my MK not fly?

Introduction

The object of this page is to try to solve some of the more common problems some people have with flying their MK's. Unfortunately most problems can be put down to pilot error as the MK system is basically very stable. However notwithstanding pilot error it is sometimes very difficult to see a fault before the MK has crashed. In order to try to establish what the problem may be caused we will use a series of pre crash symptoms to root out the cause. It is fair to say that most problems are quite simple and are easily solved.

Assumptions

Before we delve into establishing what the problem may be we will assume the following: BR BR

- The MK is a MikroKopter and has Standard Software loaded and is using Standard Hardware BR - The frame is configured to a standard frame configuration and has 4 props and motors BR - The batteries are fully charged on the TX and MK BR - The MK is being operated within the range of the TX BR - Any alterations and testing is carried out at your own risk and you do not put yourself or anyone at risk BR - The MK is in sound condition and capable of flight BR - The props are all the same size type and the motors are all the same size and type BR - You are flying within the rules and regulations of the CAA and any local bylawsBR

When you should not fly when trying to solve problems

- In the rain, heavy fog or at the risk of heavy rain or freezing conditions BR - In winds above Force 4 - 16mph. Ideally only up to a Force 3 BR - Over people or built up areas BR - In poor visibilty BR - Out of range of the MK and TX BR - Close to or over water BR

BR This list is by no means exhaustive. It assumes that you will use common sense and note that the MK can be very dangerous when it is out of control. Not only can it cause serious injury or damage to property it can also prove to be very costly.

$/!\$ ToDo:

Taking Off

Props do not rotate

Problem may be caused by one or some of the following: BR

- GAS not set to the correct channel BR - TX not transmitting on correct TX channel BR - RX not plugged in or connector reversed BR - MK not switched on BR - Motors not free to rotate BR - Motors not connected BR

Props rotate but MK will not lift off the ground

Problem may be caused by one or some of the following: BR

- Motors not rotating the right way BR - Correct props on the correct motors BR - Props tight on the motor shafts BR - Too much weight BR - Props too small or pitch too high BR - GAS channel not set correctly BR

MK lifts but immediately flips over

Problem may be caused by one or some of the following: BR

- Flight controller board upside down BR - Flight Controller board not facing the right way BR - Motors in the incorrect positions BR - Motor/s rotating the wrong way BR - Props on the wrong motors BR - MK trimming set too high BR - POTI set to a stick channel BR - Faulty wiring the motors and or BL-Ctrls BR

Hovering

MK lifts and rotates slowly

Problem may be caused by one or some of the following: BR

- Compass not calibrated BR - YAW trim set too high BR - POTI set to operate YAW cannel BR - Strong magnetic field affecting compass BR - Props and motors not rotating the right way BR - Faulty wiring the motors and or BL-Ctrls BR

MK will not stay still

Problem may be caused by one or some of the following : BR

- NICK and ROLL not trimmed BR - Wind too high BR - MK too near to the ground (less then 1 metre) BR - Fault with motor or BL-Ctrl BR - Overcompensation by pilot BR - PID settings not compatible with MK design BR - MK frame not substantial enough and flexing BR - Flight setting to sensitive for pilot BR - ACC not calibrated or calibrated off level BR - Gyros not calibrated in ambient conditions BR - Sunlight on Gyros ( This problem is still under discussion and only seems to affect FC-1.3 boards) BR - Gyro outputs not calibrated (Only applies to Flight control Boards FC-1.0, 1.1, and 1.2) BR

Controlling Height

MK continues to ascend

Problem may be caused by one or some of the following: BR

- Height control not activated BR - Sensor connection fault or sensor faulty BR - POTI channel not set in MK tool BR - Swicth not set to correct channel on TX BR - 2 switches or sliders on one POTI channel controlling Height control BR - GAS set too high BR - MK over rising air current (strong fan or heat source) BR

MK falls slowly

Problem may be caused by one or some of the following: BR

- Batteries running low BR - GAS reduced BR - Ice on props (only if flown in freezing fog)BR - Sudden barometric change (if flown indoors and the door is opened the MK will drop slightly) BR - Loss of TX signal BR

$/!\$ ToDo: Please feel free to suggest any other common problems Links

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-  ⇤ ← Revision 3 vom 16.04.2009 23:07 → 
  Größe: 5347
  Autor: SteveG
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+   ← Revision 4 vom 18.04.2009 00:49 → ⇥
  Größe: 5348
  Autor: SteveG
  Kommentar:
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 Zeile 7:
-The object of this page is to try to solve some of the more common problems some people have with flying their MK's. Unfortunately most problems can be put down to pilot error as the MK system is basically very stable. However notwithstanding  pilot error it is sometime very difficult to see a fault before the MK has crashed. In order to try to establish what the problem may be caused we will use a series of pre crash symptoms to root out the cause. It is fair to say that most problems are quite simple and are easily solved.
+The object of this page is to try to solve some of the more common problems some people have with flying their MK's. Unfortunately most problems can be put down to pilot error as the MK system is basically very stable. However notwithstanding  pilot error it is sometimes very difficult to see a fault before the MK has crashed. In order to try to establish what the problem may be caused we will use a series of pre crash symptoms to root out the cause. It is fair to say that most problems are quite simple and are easily solved.