Parachuting process suitable for double parafoil

Abstract

The invention discloses a parachuting process suitable for a double parafoil. The hanging connection steps and the inspection key points of the double-person strap system are described; the double-person off-machine posture requirement is provided; a double-person sparrow landing control method is provided; a double-person parachuting aerial special condition disposal scheme is provided.

Description

Technical Field

[0001] The invention belongs to the technical field of airborne airdrop, in particular to a parachuting process suitable for a double paraglider. Background Art

[0002] The process of solo skydiving can be divided into packing the parachute, putting on the equipment, checking, leaving the plane, opening the parachute in the air, aerial control and landing.

[0003] (1) Pack an umbrella

[0004] For solo skydiving, ground packaging involves packing the backup parachute first, then installing the main parachute mechanical opener, packing the main parachute, and finally connecting the stabilizing parachute to the release lock.

[0005] (2) Armor

[0006] Combination Figure 3 After the parachutist puts on the parachute system, he or she adjusts the chest strap, leg straps and main straps to make the harness system fit the body.

[0007] (3) Inspection

[0008] Check whether the three-ring detachment device of the stabilizer parachute is reliably connected; check whether the parachute opener is installed and set correctly; check whether the strap system is adjusted to fit, whether the spring buckle on the chest strap is reliably connected to the adjustment buckle, and whether the spring buckle on the leg strap is reliably connected to the adjustment buckle.

[0009] (4) Open the parachute

[0010] Combination Figure 4 , Figure 5 When the skydiver leaves the aircraft, the parachute pull cord directly opens the parachute bag, pulls the stabilizer parachute out of the parachute bag, and inflates the stabilizer parachute. When the main parachute opening conditions are met, the stabilizer parachute's working area is reduced, and it plays the role of guiding the parachute, pulling the parachute cord out of the canopy and straightening it to its full length. The canopy is immediately inflated and fully expanded, and the skydiver can remove the control ring from the control belt to control the movement of the parachute. If it is found that the closing cloth has not slid to the bottom, the control belt can be shaken to make it slide down to the right position. At this point, the entire main parachute opening procedure is completed.

[0011] (5) Aerial control

[0012] Aerial maneuvers may include full gliding, rotation, braking, stalling, and birdie landing.

[0013] (6) Bird landing

[0014] Before the skydiver approaches the ground, he relaxes the control ring to the highest position to make the parachute achieve the maximum horizontal speed. When the parachute is at an appropriate height from the ground, he pulls down both sides of the control ring at the same time so that the control ring reaches 100% braking position before touching the ground to achieve a bird's eye landing.

[0015] The existing technology is suitable for single skydiving, and there is no tandem skydiving workflow in China. Summary of the invention

[0016] The purpose of the present invention is to provide a skydiving workflow suitable for a tandem paraglider, so as to solve the problem that the prior art cannot guide the implementation process and steps of tandem skydiving.

[0017] The technical solution to achieve the purpose of the present invention is: a parachuting process suitable for a tandem paraglider, comprising the following steps:

[0018] (1) Packing the parachute: Install the electronic parachute opener of the reserve parachute, and pack the parachute in two ways: immediate opening and delayed opening;

[0019] (2) Donning: The assistant parachutist puts on the auxiliary harness system, and the master parachutist puts on the main harness system; the master and assistant parachutists are connected;

[0020] (7) Inspection: Check whether the three-ring connection of the stabilizer parachute release lock is correct, check whether the parachute opener is installed and set correctly, whether the harness systems of the primary and secondary parachutists fit properly and whether the connection points between them are reliable;

[0021] (8) Leaving the aircraft; this step specifies the posture requirements for two people to leave the aircraft;

[0022] (9) Opening the parachute: The main parachute opener automatically opens the main parachute. If the main parachute opener fails, the chief skydiver will handle the emergency opening.

[0023] (10) Aerial control: The master parachutist shall perform aerial control;

[0024] (7) Bird drop landing: The chief and assistant parachutists cooperate in the bird drop landing.

[0025] Furthermore, in the parachute packing step, the backup parachute is packed first and then the main parachute, and finally the stabilizing parachute is connected and released from the lock.

[0026] Furthermore, the step of putting on the garment comprises:

[0027] The assistant parachutist puts on the auxiliary harness system first, and adjusts the adjustment buckle on the chest strap, the adjustment buckle on the waist belt and the T-shaped spring buckle on the leg strap in turn to make the auxiliary harness system fit the assistant parachutist; the main parachutist puts on the main harness system normally according to the single-person parachute donning process; the main and assistant parachutists are connected: the assistant parachutist stands in front of the main parachutist's chest, hangs the T-shaped spring hook on the auxiliary harness on the lower end of the double-headed ring of the main parachute, the same on both sides, with the hook facing downwards, and the connecting belt has no twisting force, check that the safety plate is reset, and ensure that the connection is correct and firm; then connect the waist belt hook of the auxiliary harness with the D-shaped steel buckle of the main harness, without twisting and rotation of the connecting belt, with the hook facing inwards, to ensure that the safety plate is reset and the connection is reliable.

[0028] Furthermore, the checking step includes:

[0029] e) Check whether the three-ring release device of the stabilizer parachute is connected reliably;

[0030] f) Check whether the parachute opener is installed and set correctly;

[0031] g) Check whether the strap system is adjusted to fit the body, whether the spring buckle on the chest strap is connected to the adjustment buckle reliably, and whether the spring buckle on the leg strap is connected to the adjustment buckle reliably;

[0032] h) Check whether the connection points between the main and assistant parachutists are reliable.

[0033] Furthermore, the step of leaving the machine includes:

[0034] The lead parachutist holds both hands on the main harness of the secondary harness; the assistant parachutist crosses his hands and holds his own main harness, and both parachutists bend their knees and waist;

[0035] When leaving the plane, the main and auxiliary parachutists need to move in unison and move forward in coordination. The moment of leaving the plane, the auxiliary parachutist should curl up his body as much as possible, and the main parachutist should wrap his legs around the auxiliary parachutist the moment of leaving the plane, and the two people should form a whole until the parachute is opened.

[0036] Furthermore, the parachute opening step includes:

[0037] After the skydiver leaves the aircraft, the parachute pack is directly opened by the parachute opening rope, the stabilizing parachute is pulled out of the pack and the stabilizing parachute is inflated; when the conditions for opening the main parachute are met, the working area of ​​the stabilizing parachute is reduced, which plays a role as a guide parachute, pulling the parachute rope out of the canopy cover and straightening it to its full length; the canopy is immediately inflated and fully expanded, and the skydiver can remove the control ring from the control belt to control the movement of the parachute; if it is found that the closing cloth has not yet slid to the bottom, the control belt can be shaken to make it slide down into place; at this point, the entire main parachute opening procedure is completed.

[0038] Furthermore, the aerial manipulation includes:

[0039] After the canopy is full, the main skydiver controls the canopy to glide, rotate, brake and stall in the same way as a single-person paraglider.

[0040] Furthermore, the bird landing step includes:

[0041] Before the skydivers approach the ground, they relax the control ring to the highest position to allow the parachute to achieve the maximum horizontal speed. When they are 3m to 5m from the ground, the assistant skydiver lifts his legs and bends them appropriately. The main skydiver pulls down the control rings on both sides at the same time, reaching the 100% braking position before touching the ground. The two skydivers land in coordination. After landing, the two skydivers should immediately disconnect.

[0042] Furthermore, it also includes a special situation handling plan for tandem skydiving, specifically including:

[0043] d) Special situations on board and their treatment methods

[0044] If the assistant parachutist grabs the door: the main parachutist should put the assistant parachutist's hand back to a safe position before leaving the plane;

[0045] If the assistant parachutist has a bad posture at the door or after leaving the plane, he should be reminded to shrink his head and shoulders, press his body down, and curl up;

[0046] e) High jump and low opening to accelerate the spin

[0047] If you are spinning in a fall with a stabilizer, relax and allow time to reverse the control and overcome the tendency of both of you to spin in the air;

[0048] According to the altitude change of the altimeter, when you regain a stable attitude or fall to a safe height, you should reach out to the rotating side to stop the rotation, and at the same time pull the emergency pull ring of the stabilizer parachute to open the main parachute;

[0049] Prevention: Before parachuting, adjust the side straps of the secondary harness system as required to assist in posture control during falling or stabilizing falling; prevent the side straps from being too tight;

[0050] According to the altitude on the altimeter, be ready to open the parachute at any time to deal with possible parachute line entanglement;

[0051] Keep the parachutist's posture symmetrical in the harness system, and the lead parachutist hooks his legs around the parachutist's body and moves to the correct position;

[0052] Check the master parachutist's leg posture, upright position and body tension;

[0053] Check the leg posture of the parachutist being led;

[0054] f) Failure to open the main parachute

[0055] After the main parachute opens normally, if the lead skydiver fails to release the control stick normally, the follower skydiver should take over the control process until the lead skydiver is ready and completes the landing; or continue the descent process without the participation of the lead skydiver.

[0056] After the parachute is opened normally, if the parachutist faints in the harness system or cannot lift his feet during landing due to other reasons, try to keep your feet under the parachutist during the landing process; land by gliding to protect the parachutist, and pay special attention to protecting the legs and feet so that they do not collide with the ground during landing.

[0057] Compared with the prior art, the present invention has the following significant advantages: by designing a process of parachuting, covering, checking, leaving the aircraft, opening the parachute, and controlling in the air, the present invention describes the steps and key points of checking the connection of the double harness system; secondly, it proposes the requirements for the double-person leaving the aircraft posture; thirdly, it proposes the control method of double-person bird landing; and fourthly, it proposes a solution for handling special situations in the air of double-person skydiving. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 Schematic diagram of the main harness system on which the parachuting process of the present invention is based.

[0059] Figure 2 It is a schematic diagram of the secondary harness system on which the parachuting process of the present invention is based.

[0060] Figure 3 This is a schematic diagram of the Paratrooper-11A armed parachuting equipment.

[0061] Figure 4 Workflow diagram for immediate parachute opening.

[0062] Figure 5 This is the workflow diagram for secondary parachute opening. DETAILED DESCRIPTION

[0063] The working process of the tandem parafoil is different from that of the single parafoil. The present invention is used to solve the problems of the using process of the tandem parafoil on the ground, the parachute opening and the tandem skydiving by bird landing.

[0064] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0065] The invention proposes a workflow suitable for tandem skydiving, including packing a parachute, putting on equipment, checking, leaving the aircraft, opening the parachute and mid-air manipulation, canary landing and emergency handling of special situations.

[0066] The double paraglider system on which the skydiving workflow of the present invention is based is as follows: Figure 1 , Figure 2 shown.

[0067] The double paraglider system is composed of a main parachute system, a backup parachute system, a main parachute bag strap system and a secondary strap system; the main strap system includes a strap system 1, a main parachute bag 2, a backup parachute bag 3, a T-shaped spring buckle 4, a double-headed ring 5, an emergency parachute release wire rope 6, a D-shaped steel buckle 7 and a chest strap adjustment buckle 8;

[0068] The auxiliary shoulder strap system is composed of a T-shaped spring hook 9, an auxiliary shoulder strap main part 10, a back pad 11, a triangular buckle 12, an adjustment buckle 13, a ring 14, an adjustment buckle 15, a T-shaped adjustment hook 16 and a rectangular adjustment buckle 17.

[0069] (1) Pack an umbrella

[0070] The first step of packing the parachute of the present invention is to install the electronic parachute opener of the backup parachute, and then pack the parachute according to the prior art in two ways: immediate parachute opening and delayed parachute opening.

[0071] (2) Armor

[0072] Single person freehand skydiving: Single person freehand skydiving is the same as the existing technology.

[0073] Single armed skydiving: Single armed skydiving is the same as existing technology.

[0074] Tandem skydiving:

[0075] a) The assistant parachutist puts on the auxiliary harness system and uses the adjustment buckle on the chest strap to adjust the length of the chest strap to make it fit;

[0076] Use the adjustment buckles on the back and rear waistband to adjust it to a suitable fit; after hanging it with the T-shaped buckles on the leg straps, adjust the length of the leg straps to make it a suitable fit.

[0077] b) Double connection: Hang the connecting hook on the auxiliary harness on the lower end of the double-headed ring of the main parachute, the same on both sides, with the hook opening facing downwards, the connecting belt has no twisting force, check the safety plate is reset, and ensure the connection is correct and firm. Connect the belt hook of the auxiliary harness to the D-shaped ring of the main harness, the connecting belt has no twisting force and rotation, the hook opening is facing inwards, ensure the safety plate is reset, and the connection is reliable.

[0078] Tandem armed skydiving:

[0079] c) The parachutist puts on the secondary harness and waist belt, hangs the oxygen tank, and wears the helmet, goggles, oxygen mask and gun. The oxygen tank of the parachutist is hung on the right side. The oxygen tank of the main parachutist is hung on the left side of the parachutist. The oxygen tube of the parachutist passes through the inside of the gun. The waist belt passes through the oxygen bag and then fixes the sleeve.

[0080] d) Two-person armed connection: Connect the shoulder hooks on both sides of the auxiliary parachutist harness system to the large ring on the chest of the main parachutist, and the oxygen supply tube of the main parachutist passes through the inside of the hook. The left waist connection of the main and auxiliary parachutist harness system is connected to the oxygen supply of the main parachutist, and the oxygen supply tube of the main parachutist passes through the inside of the connection belt. The oxygen supply tube of the parachutist being carried passes through the inside of the gun.

[0081] (3) Inspection

[0082] The inspection steps are similar to the prior art, with the addition of inspection of the connection points of the primary and secondary parachutists.

[0083] (4) Leaving the machine

[0084] Before leaving the aircraft for a tandem skydive, the lead skydiver grabs both hands on the main harness of the secondary harness. The assistant skydiver crosses his hands and grabs his own main harness, and both skydivers bend their knees and bend over.

[0085] When the dispatcher conveys the order to parachute, the main parachutist gives a command or gesture, and the two people leave the plane in coordination. The main parachutist and the assistant parachutist move in unison and move forward in coordination. The assistant parachutist curls up as much as possible at the moment of leaving the plane. The main parachutist wraps his legs around the assistant parachutist at the moment of leaving the plane, and the two people form a whole until the parachute is opened. When jumping high and opening low, after the stabilizer parachute works normally, the two parachutists can unfold their bodies and fall in a frog-like manner. The armed departure of two people is similar to that of two people leaving the plane unarmed.

[0086] (5) Open the parachute

[0087] The parachute opening process is the same as the prior art, and is divided into immediate parachute opening and secondary parachute opening.

[0088] (6) Aerial control

[0089] After the canopy is full, the main skydiver controls the canopy to glide, rotate, brake, stall, etc. in the same way as a single-person paraglider.

[0090] (7) Bird landing

[0091] The landing for a tandem skydive is different from that for a single skydive. The specific steps are as follows:

[0092] Before the skydivers approach the ground, they relax the control ring to the highest position to allow the parachute to achieve the maximum horizontal speed. When they are at an appropriate height from the ground (about 2m to 3m for a single person, 3m to 5m for a double person), the assistant skydiver lifts his legs and bends them appropriately. The main skydiver pulls down the control rings on both sides at the same time to reach 100% braking position before touching the ground. The two skydivers land in coordination. After landing, the two skydivers should immediately disconnect.

[0093] (8) Tandem skydiving special situation handling plan

[0094] g) Special situations on board and their treatment methods

[0095] If two people have difficulty moving after being connected in the plane, the parachutist on board should help them move to the door of the plane and leave the plane correctly. If they miss the best time to parachute during the movement, they should stop parachuting, fly a circle again, and parachute again.

[0096] If the assistant parachutist grabs the door: For small aircraft or other aircraft with small doors, some parachutists may reflexively use their elbows to hold themselves against the door. The main parachutist should put the assistant parachutist's hands back to a safe position before leaving the aircraft.

[0097] If the assistant parachutist has a bad posture at the door, you should remind him to shrink his head and shoulders, press his body down, and curl up. If you have already jumped out of the plane, but the assistant parachutist has a bad posture, you should remind him to curl up (you should shout into his ear).

[0098] h) High jump and low opening to accelerate the spin

[0099] If you are spinning in a fall with a stabilizer, relax and allow time to reverse the control and overcome the tendency of both of you to spin in the air.

[0100] Observe the altimeter and pay attention to the altitude changes. When you regain a stable attitude or fall to a safe height (whichever comes first), extend your hand to the rotating side to stop the rotation and at the same time pull the emergency pull ring of the stabilizing parachute to open the main parachute.

[0101] Prevention: Before parachuting, adjust the side straps of the secondary harness system as required to assist in posture control during a fall or stabilize a fall. Prevent the side straps from being too tight and limiting the ability of the parachutist to curl up or straighten up.

[0102] Watch the altimeter to note the altitude and be ready to open the parachute at any time to deal with possible parachute line entanglement.

[0103] Keeping the parachutist symmetrical in the harness system, the lead parachutist hooks his legs around the parachutist's body and moves to the correct position.

[0104] Check the master parachutist's leg posture, body posture and body tension (needs to be relaxed).

[0105] Check the leg posture of the parachutist being led and provide guidance if necessary.

[0106] Note: At several important points such as opening the stabilized parachute, opening the main parachute, and falling with the stabilized parachute, stay alert to the altitude, complete the correct actions at a safe altitude, and do not be affected by unstable posture or unfavorable control.

[0107] i) Failure to open the main parachute

[0108] When preparing to open the main parachute, if you feel that the attention of the parachutist is distracted, you should tell the parachutist to tighten his body and prepare to open the parachute, ensuring that the parachute opening procedure is good and the dynamic load of the parachute opening is properly borne.

[0109] If the main parachute is opened normally and the lead skydiver fails to release the control stick normally, the follower should take over the control process until the lead skydiver is ready and completes the landing, or continue the descent process without the participation of the lead skydiver.

[0110] If the parachutist becomes unwell in the air:

[0111] If the parachutist appears unusually quiet, this may be a sign of physical discomfort and you should try to maintain constant communication with the parachutist to reduce the chances of nausea and vomiting or alleviate the symptoms.

[0112] Once it is determined that the parachutist is feeling unwell, try to minimize aerial movements. If it is high altitude skydiving, check the oxygen status of the parachutist, adjust the tightness of the straps as much as possible to improve blood circulation, or take off the parachutist's hat and goggles (the parachute hat must be put back on before landing).

[0113] After the parachute is opened normally, if the parachutist faints in the harness system or cannot lift his feet during landing due to other reasons, try to keep your feet under the parachutist during landing. Use gliding to land to protect the parachutist, especially pay attention to protecting the legs and feet from colliding with the ground during landing.

[0114] j) The assistant parachutist nervously holds the hands of the lead parachutist

[0115] The assistant parachutist grabs the hands of the main parachutist during the parachuting process. The main parachutist shouts at the assistant parachutist to let go of his hands and puts the assistant parachutist's hands back to a safe position. If unsuccessful, stretch your arms as far as possible and then suddenly pull your hands back. This action should use the shoulder muscles and be as strong as possible, ensuring its explosiveness, until you successfully break free of one of the hands and open the parachute.

[0116] The invention has been tested and verified, and has been put into use. The product has good performance and can meet various index requirements.

Claims

1. A parachuting process suitable for a tandem parafoil, characterized in that: The following steps are involved: (1) Packing the parachute: Install the electronic parachute opener of the reserve parachute, and pack the parachute in two ways: immediate opening and delayed opening; (2) Donning: The assistant parachutist puts on the auxiliary harness system, and the master parachutist puts on the main harness system; the master and assistant parachutists are connected; (3) Inspection: Check whether the three-ring connection of the stabilizer release lock is correct, check whether the parachute opener is installed and set correctly, whether the harness systems of the primary and secondary skydivers fit properly and whether the connection points between them are reliable; (4) Leaving the aircraft; this step specifies the posture requirements for two people to leave the aircraft; (5) Open the parachute: The main parachute opener automatically opens the main parachute. If the main parachute opener fails to work properly, At this time, the chief parachutist will handle the emergency parachute opening action; (6) Aerial control; The master parachutist will be in charge of the aerial control. (7) Bird drop landing: The chief and assistant parachutists cooperate in the bird drop landing.

2. The parachuting process for a tandem parafoil according to claim 1, characterized in that: In the parachute packing step, the backup parachute is packed first and then the main parachute, and finally the stabilizing parachute is connected and released from the lock.

3. The parachuting process for a tandem parafoil according to claim 1, characterized in that: The step of putting on the garment comprises: The assistant parachutist puts on the auxiliary harness system first, and adjusts the adjustment buckle on the chest strap, the adjustment buckle on the waist belt and the T-shaped spring buckle on the leg strap in turn to make the auxiliary harness system fit the assistant parachutist; the main parachutist puts on the main harness system normally according to the single-person parachute donning process; the main and assistant parachutists are connected: the assistant parachutist stands in front of the main parachutist's chest, hangs the T-shaped spring hook on the auxiliary harness on the lower end of the double-headed ring of the main parachute, the same on both sides, with the hook facing downwards, and the connecting belt has no twisting force, check that the safety plate is reset, and ensure that the connection is correct and firm; then connect the waist belt hook of the auxiliary harness with the D-shaped steel buckle of the main harness, with the connecting belt free of twisting and rotation, and the hook facing inwards, to ensure that the safety plate is reset and the connection is reliable.

4. The parachuting procedure and control flow applicable to a tandem parafoil according to claim 1, characterized in that: The checking step comprises: a) Check whether the three-ring release device of the stabilizer parachute is connected reliably; b) Check whether the parachute opener is installed and set correctly; c) Check whether the strap system is adjusted to fit the body and whether the spring buckle on the chest strap is connected to the adjustment buckle reliably. Whether the spring buckle and adjustment buckle on the leg strap are connected reliably; d) Check whether the connection points between the main and assistant parachutists are reliable.

5. The parachuting procedure and control flow applicable to a tandem parafoil according to claim 1, characterized in that: The off-machine step comprises: The lead parachutist holds both hands on the main harness of the secondary harness; the assistant parachutist crosses his hands and holds his own main harness, and both parachutists bend their knees and waist; When leaving the plane, the main and auxiliary parachutists need to move in unison and move forward in coordination. The moment of leaving the plane, the auxiliary parachutist should curl up his body as much as possible, and the main parachutist should wrap his legs around the auxiliary parachutist the moment of leaving the plane, and the two people should form a whole until the parachute is opened.

6. The parachuting procedure and control flow applicable to a tandem parafoil according to claim 1, characterized in that: The parachute opening step comprises: After the skydiver leaves the aircraft, the parachute pack is directly opened by the parachute opening rope, the stabilizing parachute is pulled out of the pack and the stabilizing parachute is inflated; when the conditions for opening the main parachute are met, the working area of ​​the stabilizing parachute is reduced, which plays a role as a guide parachute, pulling the parachute rope out of the canopy cover and straightening it to its full length; the canopy is immediately inflated and fully expanded, and the skydiver can remove the control ring from the control belt to control the movement of the parachute; if it is found that the closing cloth has not yet slid to the bottom, the control belt can be shaken to make it slide down into place; at this point, the entire main parachute opening procedure is completed.

7. The parachuting procedure and control flow applicable to a tandem parafoil according to claim 1, characterized in that: The aerial manipulation includes: After the canopy is full, the main skydiver controls the canopy to glide, rotate, brake and stall in the same way as a single-person paraglider.

8. The parachuting procedure and control flow applicable to a tandem parafoil according to claim 1, characterized in that: The bird landing step comprises: Before the skydivers approach the ground, they relax the control ring to the highest position to allow the parachute to achieve the maximum horizontal speed. When they are 3m to 5m from the ground, the assistant skydiver lifts his legs and bends them appropriately. The main skydiver pulls down the control rings on both sides at the same time, reaching the 100% braking position before touching the ground. The two skydivers land in coordination. After landing, the two skydivers should immediately disconnect.

9. The parachuting process for a tandem parafoil according to claim 1, characterized in that: It also includes a special plan for tandem skydiving, including: a) Special situations on board and their treatment methods If the assistant parachutist grabs the door: the main parachutist should put the assistant parachutist's hand back to a safe position before leaving the plane; If the assistant parachutist has a bad posture at the door or after leaving the plane, he should be reminded to shrink his head and shoulders, press his body down, and curl up; b) High jump and low opening to accelerate the spin If you are spinning in a fall with a stabilizer, relax and allow time to reverse the control and overcome the tendency of both of you to spin in the air; According to the altitude change of the altimeter, when you regain a stable attitude or fall to a safe height, you should reach out to the rotating side to stop the rotation, and at the same time pull the emergency pull ring of the stabilizer parachute to open the main parachute; Prevention: Before parachuting, adjust the side straps of the secondary harness system as required to assist in posture control during falling or stabilizing falling; prevent the side straps from being too tight; According to the altitude on the altimeter, be ready to open the parachute at any time to deal with possible parachute line entanglement; Keep the parachutist's posture symmetrical in the harness system, and the lead parachutist hooks his legs around the parachutist's body and moves to the correct position; Check the master parachutist's leg posture, upright position and body tension; Check the leg posture of the parachutist being led; c) Failure to open the main parachute After the main parachute opens normally, if the lead skydiver fails to release the control stick normally, the follower skydiver should take over the control process until the lead skydiver is ready and completes the landing; or continue the descent process without the participation of the lead skydiver. After the parachute is opened normally, if the parachutist faints in the harness system or cannot lift his feet during landing due to other reasons, try to keep your feet under the parachutist during the landing process; land by gliding to protect the parachutist, and pay special attention to protecting the legs and feet so that they do not collide with the ground during landing.

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