1 Attaching the connecting shaft to the Mavic Air Main Body
(1) The connecting shaft is the rod-like structure in the foreground of the photo below. This will be attached to the body of the Mavic Air using strong Velcro tape (with a peel strength of 2kg/cm²).
(2) First, take the 80mm long x 20mm wide piece of Velcro tape (hereby referred to as Velcro A) that comes with the product and paste it lengthwise over the center of gravity of the drone body. The center of gravity is the position where the front and rear ends of the drone balance out.
(3) Viewing from the left side of the drone body, this is around where it should be pasted. In addition, the Velcro tape at the bottom of the drone body is for the attachment of LED lights. This is not where the connecting shaft will attach.
(4) Paste the flaps of the Velcro tape down onto the side of the drone body, in the same way as shown in the red circle in the photo below. In this way, the connecting shaft can be easily detached from the drone as long as you grip on to the edges of Velcro A.
Right view of drone body
(5) This completes the attachment of the 80mm long x 20mm wide Velcro tape A onto the drone. As a note, please refrain from peeling off Velcro A unless it is worn out and has to be replaced.
(6) Next, attach the Velcro-fitted connecting shaft (this Velcro shall hereby be referred to as Velcro B) onto the center of gravity of the drone (the position where the front and rear ends of the drone balance out). Essentially, set and fix Velcro B onto Velcro A. The specific steps of the attachment are spelled out below.
1. First, lightly affix the faces of Velcro A and Velcro B together and ensure that they are aligned in position.
2. Next, attach the Mavic Air—with its connecting shaft—onto the spherical guard. (Point 4(6) covers the way to attach the connecting shaft onto the Mavic Air.) Then, check that the propellers of the drone do not come into contact with the smaller, black colored octagonal Gimbal. Do this by turning the propellers manually. (The spherical guard comes with a smaller octagonal Gimbal inside a larger decahedron-shaped Gimbal).
3. Once you have confirmed that steps 1 and 2 are complete, take out the drone—with the connecting shaft attached on—from the spherical guard. You may now fix Velcro tapes A and B firmly together, such that they are well stuck to each other. Never do this to the drone on the floor as it will strain its arms. Instead, do so with the drone in your hand.
In addition, the flap circled in blue in the photo below is there so as to facilitate the easy detachment of the connecting shaft from the Mavic Air body.
Photo of top-down view
(7) This completes of the attachment of the connecting shaft to the drone body. In addition, these are some additional explanations regarding the strength of the Velcro attachments.
1. Most importantly, the spherical guard is hanging from the drone from the period of takeoff till landing. In this situation, the adhesion between Velcro A and Velcro B is strengthened by the weight of the spherical guard. Consequently, the Velcro should not peel off.
2. The Velcro tapes have a peel strength of 2kg/cm². This is strong enough not to peel off or slip out of position even if the drone bumps into obstacles like walls. The adhesion of Velcro A on the drone body and the adhesion of Velcro B on the connecting shaft are also strong.
3. Before takeoff and after landing, the drone will be hanging from the spherical guard. In this situation, the weight of the drone body will act as a peeling force on Velcro A and B. However, as the total weight of the Mavic Air is only around 430g, it will not cause the Velcro to peel apart as the latter is able to withstand up to 2kg/cm².
2 Assembling the Hemispheres
(1) The two hemispheres are detached simply for packaging reasons.The spherical guard for Mavic Air must always be kept as a complete sphere in order to maintain its strength.This is because the carbon poles are thin, with a diameter of only 1.2 mm, and the ends of the carbon poles will be worn down if assembled repeatedly.
(2) Apply instant adhesive to the approx. 2 mm section of the tip of the black carbon pole, and fix it into the blue hexagonal joint so that it will not come out.The order is as follows: First, insert and fix the two carbon poles with the stickers on the left side to the hexagonal blue joint with the sticker on the left side. Next, insert and fix the two carbon poles with stickers on the right side to the hexagonal blue joint with the sticker on the right side. Insert and fix the remaining carbon poles into the hexagonal blue joints in the same fashion.
(3) The opening on the top of the sphere
The opening on top of the sphere needs to be removed, so absolutely do not apply instant adhesive.
Note: If the black carbon rod on the sphere opening is removed many tens of times, it is possible that the insertion section will become loose and the carbon rod will easily slip out. This is dangerous during flight. If this happens, apply instant adhesive to the carbon rod along the 2 mm section of the tip to make it thicker. This will prevent it from slipping. However, do not insert the carbon rod into the blue joint until the instant adhesive has dried.
3 Performance Specifications
(1) [Very important] Total weight of spherical drone guard 90g + Total weight of drone body (including batteries etc.) 430g = 520g. The maximum payload (total weight allowed for stable flight) is measured by PAUI to be 570g.
(2) [Very important] The flight time is around 11 minutes. Take note of the battery level on the monitor and promptly land the drone once the battery warning appears.
(3) [Very important] Mavic Air’s frontal obstacle detection system, rearward obstacle detection system and downward vision system do not work in the DJI Go 4 application. Also, the S (for Sport) mode should be used in conjunction with the spherical guard. The drone will not be able to fly if any of the detectors are triggered by the presence of the spherical guard, as the below video shows.
4 Flight Procedure
(1) Make sure the transmitter power, DJI Mavic Air main unit power, and DJI GO 4 app are on.
(2) [Very important] Mavic Air’s frontal obstacle detection system, rearward obstacle detection system and downward vision system do not work in the DJI Go 4 application. And set to S (sports) mode.
(3) [Very important] Perform compass calibration 360 degrees horizontally and 360 degrees vertically.
* Make sure to perform every time you exchange the batteries. Failing to do so may make it impossible to control the drone.
* If there is battery life remaining after the first flight, perform the second flight as below.
1 If the motor is still on after the first flight (if the propellers are still rotating), there is no need to perform compass calibration; the drone will fly stably during the second flight.
2 In contrast, if the motor is stopped (if the propellers are stopped) after the first flight, the drone will not fly stably during the second flight. In this situation, it is required that you perform the compass calibration and as in (4) below work on the drone on a flat surface (when the motor stops the main controller (MC) will judge that the drone has landed on a flat surface. However, the drone will actually be moving diagonally inside of the sphere. The MC will then be unable to detect that the drone has landed on a flat surface, causing it to be unstable for the second flight).
(4) Place the Spark on a flat surface, and wait until it receives a GPS signal.
*By placing the drone on a flat surface, the main controller will remember at which position it is parallel to flat ground. If the main controller has forgotten this, it may be impossible to control the drone.
(5) Insert and set the Spark into the spherical guard. Please refer to the below.
(6) [Very important] Manual take off
Push the two proportional control system sticks to the front and inwards to start the engine, and perform take off by gradually raising the elevation stick. Do not use the automatic take off function on the DJI GO 4 app. Using the automatic take off will cause the app to think that the motor output has been overloaded, due to the fact that the drone is heavier than normal, causing the motor overload warning to show on the app. After that, an over discharge warning may appear.
(7) [Very important] Manual soft landing
*Please perform soft landings so as not to inflict excess impact on the rotating spherical guard. Specifically, momentarily stop descent at 10 – 20 cm off the ground, and then land the drone slowly. Do not use the automatic landing function on the DJI GO 4 app. Be careful when landing on concrete in particular.
(8) Remove the drone from the rotating spherical guard