PRE-FLIGHT-CHECKS

1. Carry out M300 compass calibration before proceeding.

2. If a calibration of the UAPS has not been performed in the previous 2 weeks or 60 minutes pump time (per online spreadsheet) please refer to the Calibration section below (section between 17 and 18 ) for instructions and perform Calibration prior to flight. Calibration or knowledge of current pump performance is vital to a. Know if the pump is healthy and b. To be able to perform in-air pump level calculations by taking ml-p-s and multiplying by seconds-sprayed and subtracting from known take-off tank level.

3. Place drip tray under payload before installation of UAPS system.

4. Ensure all 8 UAPS frame attachment bolts are fitted and secured.

5. High pressure lance hose stowed correctly under high pressure pump.

6. Low pressure hose attached to fluid reservoir for flight or stowed in the security clip located on left hand undercarriage leg for transport.

7. Fluid reservoir straps securely fitted.

8. Lance extension fitted, with the nozzle set to horizontal.

9. Lance extension security bolt tight.

10. Lens cap for UAPS FPV camera removed.

11. Check for security and operation of the physical limit device.

12. UAPS battery:

    1. Main UAPS switch in the off position.

    2. Remove battery cover and bolt.

    3. Insert LiPo battery into UAPS payload.

    4. Balance cable/plug attached

    5. Main power XT60 connected (male to female)

    6. Secure battery cover and bolt.

13. UAPS Transmitter:

    1. Turn on the UAPS Transmitter, (push and hold). (Allow voice notes to fully complete rather than continuously pressing for next instruction, you must select another button before you can repeat an instruction)

    2. Transmitter main voltage will be displayed top right (small) and bottom right of the main screen. It IS a touchscreen so beware of finger trouble. Press home button (house icon) bottom left to return main screen. (7.2v will trigger Low voltage alarm).

    3. Move the timer switch (BLACK rocker switch, top LEFTof UAPS controller) to the second position, then fully rearwards to reset the spray timer.

    4. Instructions for transmitter use are on the 6 buttons either side of the red slider - display brightness is on s1 pot and volume is on s2 pot - check to make sure volume is up.

    5. (Allow voice notes to fully complete rather than continuously pressing for next instruction, you must select another button before you can repeat an instruction).

14. Turn on the UAPS system via the silver main power switch on UAPS battery housing, and check for battery data on the OLED screen.

15. Check the UAPS Transmitter main screen for received battery data. (see 21)

16. Check limits in the yaw and pitch axis for possible prop strike from the spray lance/boom.(Ensure front props fully extended towards centre line as props do not extend enough when folded - also, this does NOT mean horizontal, as the further most extent is achieved at a slight angle - see included photos below).

17. Confirm UAPS video uplink is operational. (press DISP button [left hand d-pad]) RTN takes you back to the telemetry screen. (SYS and MDL change channel and frame rate respectively - if accidentally toggled - cycle until picture returns).(see 21).

Calibrate UAPS (if not performed in previous 2 weeks or 60 mins pump time)

1. Insert Calibration tank (water only CAUTION no baffles - do NOT fly) Prime prior to running pump

2. Empty tank through system - log seconds taken (timer shows minutes and seconds - so beware to change 1:42 to 102 seconds (for example - 60+42)

3. 1000/102 = 9.8ml per seconds   -  9.8ml x 60 = 588ml per minute or .58 litres per minute.

4. Another example - 1:27   is 87s  - therefore 1000/87=11.49 x 60 = 689ml per minute  (This is known as the ‘flow rate’.

5. Log cali on online spreadsheet for specific UAPS

6. FYI - a ballpark of 700ml per minute is a perfect score. Close is fine - Anything below 500ml per minute is RTB for servicing.

7. Example - Whilst flying, little Jimmy wonders what his remaining fluid level is. He knows he took off with 800ml. His pump timer reads 13 seconds of spraying logged and he knows that his pump at last calibration was recording 12ml-p-s. Therefore Jimmy can estimate that he has sprayed 13x12= approx 160ml leaving him with 640ml payload.

18. Check lipo and RSSI levels are acceptable (lipo above 3.4 per cell and RSSI above 80%) (see 21)

19. Remove the drip tray from underneath the payload and stow accordingly.

20. Conduct RUAS SOPs with regards to M300 pre-flight safety checks, with the following in addition:

    1. Centre of gravity/payload recalibration (in flight).

    2. Geofence limits set to 50m max AGL, 250m horizontal (site dependant).

    3. Downward position sensors switched to off.

    4. Set front distance sensor limit to “1.5m”, audible warning alert to 6m.

21. Whilst spraying, video feed will be in operation, therefore RSSI and Pump timer information can be triggered as an audible reading via the two back round momentary buttons on the transmitter’s rear plate.

22. Try to ensure boom up (centre left stick) before landing.

Ensure clean up and battery Disconnect following lipo and pa1 and 6 .. balance lead can drain batteries.

Link to spreadsheet