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Questions tagged [parachute]

A device made of thin material designed to unfold and create drag, typically used to arrest the descent of a falling object.

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Why military parachute backpack stays with the aircraft?

As seen on this youtube video where military personnel jumps while the backpack stays attached to the aircraft, why is that? what is the purpose of it compared to the other non military skydiving ...
Gabe's user avatar
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Does partial flow separation due to toggle input affect the physics of paraglider/ canopy controls?

A skydiving canopy designer said the following: Airflow is separated even before stall on a big portion of the canopy.... It's specific to [the] way toggle[s] distort the trailing edge. Is this true,...
Oleg Pryadko's user avatar
1 vote
0 answers
47 views

Does ground effect affect a paraglider/ canopy?

I've heard that ground effect is only significant if the wing is closer to the ground than its span, and I've never seen a canopy/ paraglider that would qualify for that. Is that true or would there ...
Oleg Pryadko's user avatar
1 vote
1 answer
74 views

What are all the ways that wind velocity can affect a paraglider/ canopy before it touches the ground?

Let's assume that a "perfect" humanoid robot flying a ram air parafoil (paraglider or canopy) performs some maneuver for landing exactly the same way multiple times. The only difference ...
Oleg Pryadko's user avatar
-4 votes
3 answers
983 views

Could a trained individual passenger escape a commercial plane crash by bringing the necessary equipment to parachute?

We've been through why airlines don't provide parachutes for the passengers. But who says they have to be provided? I want to take my fate into my own hands the next time I fly, by bringing my own ...
Purple P's user avatar
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9 votes
1 answer
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When bailing out of a T6 what is the intended path that the pilot clears the horizontal stabilizer?

My wife and I who have both flown in vintage T-6's in the rear seat have been given instructions to stand on the seat and "dive toward the wing" in the event we need to bail out of the ...
tsjackson's user avatar
6 votes
2 answers
323 views

Why would a ram air parachute need less brake input to stall at a higher altitude?

I have some anecdotal evidence that a ram air sport parachute requires less toggle input to stall at higher altitudes. A pilot needed one wrap of the brake lines around the hands to quickly, ...
Oleg Pryadko's user avatar
0 votes
2 answers
173 views

How would IAS change with altitude for an unpowered parafoil?

Suppose an unpowered parafoil (e.g. a ram air parachute or paraglider) is descending (gliding) in a standard atmosphere. Suppose a pitot tube is positioned to always point into the relative wind (e.g. ...
Oleg Pryadko's user avatar
6 votes
1 answer
266 views

Why are emergency parachutes for pilots so heavy?

Parachute technology doesn't seem to have got much lighter in the past few decades. It seems that most emergency parachutes designed for pilots still weigh about 15 lb. And yet a Cirrus BRS designed ...
Zaz's user avatar
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4 votes
2 answers
810 views

What are the fundamental differences between a parachute and a paraglider?

I want to know the difference between a paraglider and a parachute. Can you explain the difference between a paraglider and a parachute in general?
이승리's user avatar
22 votes
1 answer
3k views

What would have happened if the space balloonists had opened their parachute immediately when jumping off?

What would have happened if Joe Kittinger, Felix Baumgartner and Alan Eustace had opened their parachute right after jumping off the capsule (respectively releasing oneself from the balloon in case of ...
Better not tell's user avatar
2 votes
1 answer
159 views

What is the best way to determine Run-in direction for parachute activity?

I am very new into flying skydivers. The aim is to get skydivers to a certain altitude usually 14000ft as quick as possible. They have to be dropped into a certain direction to compensate for wind. ...
Ted Staggs's user avatar
9 votes
3 answers
1k views

Why don't [most] sailplanes use whole-airplane / ballistic parachutes?

My understanding is that sailplanes usually have the pilots wear the parachute on their back, requiring the pilot to bail out of the aircraft before they can use the parachute. Given the maturity of ...
Nikita's user avatar
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4 votes
2 answers
412 views

What are the differences between a reserve parachute and a bailout parachute?

Glider and aerobatic pilots wear bailout parachutes. Skydivers wear reserve parachutes. Both have the identical goal of saving the pilot's bacon when the primary flight means fails. However, the ...
Kenn Sebesta's user avatar
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24 votes
3 answers
8k views

Why don't militaries use ram-air parachutes?

Military parachutes for use by humans (both paratroopers and distressed aircrew) tend to be of simple round or (more recently) cruciform design: (Image by the United States Army, via Wikimedia ...
Vikki's user avatar
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Calculating the horizontal drift for parachute, is it okay to assume the "starting speed" to be terminal velocity?

Plus in the worst case of the maximum range, can we assume we are already at the terminal velocity when we're deployed at 600m? If we assume that we are deployed at 600m, we "freefall" for a ...
user55574's user avatar
1 vote
1 answer
683 views

Calculating the horizontal distance the payload would travel with a parachute (horizontal drift)?

When you release a payload with the help of a circular parachute, and you want to find out the range in which it would land. And how would you find the descent gradient of the parachute?
App's user avatar
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1 vote
0 answers
214 views

Did C-124 loadmasters receive parachute and water survival training?

When the position of "loadmaster" was created for the Douglas C-124 Globemaster II, did prospective USAF loadmasters attend the parachute training and water survival school at the 3904th ...
DFS346's user avatar
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5 votes
1 answer
234 views

What happened with the balloons of project Excelsior?

After the flight to the ISS yesterday I am reading more stuff about mankind in the universe. Reading about the Excelsior project makes me wonder what happened with the helium balloon after Joseph ...
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3 votes
1 answer
177 views

Statistically, how safe are para-motor craft compared to other GA planes?

I know there are very well kept records for death and accident rates in GA aircraft, but I was wondering if there were numbers for para-motor aircaft that are easy to compare?
David's user avatar
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-5 votes
2 answers
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What is the maximum height for deploying a parachute? [closed]

i see a detachable plane cabin project .When an airplane crashes, the human toll is generally heavy. Based on this observation, Vladimir Tatarenko, a Ukrainian engineer who worked in particular for ...
L'aviateur's user avatar
9 votes
2 answers
2k views

D.B Cooper incident - What caused the tail to move after a jump?

In the Wiki page on "D.B Cooper", the presumed moment he jumped out of the aircraft is described: At approximately 8:13 p.m., the aircraft's tail section sustained a sudden upward movement, ...
Cloud's user avatar
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2 votes
2 answers
632 views

Can a paraglider rescue chute and its pilot handle terminal velocity?

Imagine a paraglider cuts his main chute and reaches terminal velocity. Can he still land safely when he deploys hes rescue chute? The european standards require that paragliding rescue chutes can ...
NtFreX's user avatar
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2 votes
1 answer
718 views

Whats the difference between a paragliding rescue chute and a parachute?

Whats the difference betweem a paragliding rescue chute and a parachute and could I use a parachute as a paragliding rescue chute and what would be a disadvantage/advantage? At least these points are ...
NtFreX's user avatar
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4 votes
1 answer
388 views

Apart from the C-130, are there other airlifter aircraft that are able to perform LAPES drops?

The C-130 is well known for her ability to perform a LAPES (Low Altitude Parachute Extraction) drop to deliver vehicles to an airhead. I'm wondering if other larger military airlift aircraft that are ...
Davidw's user avatar
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2 votes
3 answers
2k views

Why/how is a downplane parachute configuration aerodynamically stable?

One of the most dangerous situations possible in skydiving is a so-called downplane, where both the main and reserve chutes deploy, and they shift outwards to the sides of the parachutist until ...
Vikki's user avatar
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8 votes
1 answer
713 views

In what emergency situations would a pilot bail out of a helicopter?

The Hiller UH-12 POH actually mentions “Emergency Exit in Flight” as an emergency procedure. What emergencies would make the pilot do this and why don’t other helicopter POH’s mention this?
Erin Bensen's user avatar
0 votes
0 answers
115 views

Why don’t most aircraft have emergency braking parachutes? [duplicate]

Braking parachutes were standard on first-generation jetliners, but have since fallen almost entirely out of use except on military aircraft; essentially the only civilian aircraft nowadays to still ...
Vikki's user avatar
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-3 votes
1 answer
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Why commercial planes do not provide parachutes? [duplicate]

In case of emergency I think parachutes would be more safe than life-jackets.
spetzz's user avatar
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What is the specific FAA regulation with regards to a pilot dropping jumpers into a solid cloud base? [duplicate]

What is the FAA regulation with regards to a pilot dropping jumpers into a solid cloud base? I saw some parachute jumpers come through a solid cloud layer with a base at around 1300 AGL. They landed ...
Debbie's user avatar
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2 votes
1 answer
729 views

What does the acronym PDA stand for in the aviation domain

While reading an article about Hang Gliding reserve parachutes, I came across the acronym "PDA". The article seemed to imply that this is a type of parachute and a further google search seems to ...
bclarkreston's user avatar
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3 votes
1 answer
766 views

Is a French PAC skydiving license equivalent to an AFF license?

I am planning to do a skydiving course and I was thinking of doing the course in France. That means, I would get a stage PAC license course instead of AFF. I want to know how PAC is different from AFF ...
Ankit Agarwal's user avatar
1 vote
1 answer
550 views

What is the definition of "occupant" in 14 CFR 91.307?

Does a solo pilot performing aerobatics constitute an "occupant" for the purposes of requiring a parachute per 91.307(c)?
Joseph Hyde's user avatar
4 votes
1 answer
1k views

What is the aerodynamic reason military parachutes are square?

Until these, I had only ever seen round military parachutes. The slots also differ between paratroop and cargo.
Pilothead's user avatar
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5 votes
1 answer
2k views

The FARs "require" the wearing of parachutes for certain types of maneuvers. Is parachute training required?

FAR 91.307 (c) requires that each occupant of an aircraft must wear an approved parachute during the execution of certain types of maneuvers (e.g., more than 60 degrees of bank or or 30 degrees pitch,...
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0 votes
1 answer
361 views

What are the equations of motions for parafoils?

I want to use the following equations so as to describe the motion of parafoil $$\left[ {\begin{array}{*{20}{c}}{\dot x}\\{\dot y}\\{\dot z}\end{array}} \right] = {V_a}\left[ {\begin{array}{*{20}{c}}{\...
James Flash's user avatar
2 votes
0 answers
61 views

What pose is best for to assume before hitting the ground for survival after failed parachute? [duplicate]

The title says it all. Assuming one is falling down on a hard perpendicular surface after reaching terminal velocity, what pose provides the highest chances of survival? My guess would be one of the ...
Andrii Kozytskyi's user avatar
93 votes
6 answers
97k views

If my parachute fails to open, why should I aim for land rather than water?

I was watching these 'what if' parachute failure videos on YouTube and everywhere they say do not choose water over land. Why should we not choose water and what happens if we land in water? One ...
karthikdivi's user avatar
16 votes
2 answers
5k views

What is the equivalent height of a parachute landing?

I understand that this will vary depending upon the equipment used, the bodyweight of the jumper, barometric pressure etc, but what is the approximate equivalent height of landing from a parachute ...
Gaius's user avatar
  • 261
3 votes
1 answer
716 views

Is there any civil aircraft that decelerates with a parachute? [duplicate]

Some previous generations military aircraft decelerate with a parachute to decrease landing distance: Israel Aircraft Industries Kfir landing with a parachute (source) It this something found on any ...
mins's user avatar
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1 vote
1 answer
463 views

How much does a drag chute system weight?

How much weight does a drag chute add to a plane? Let's take the Tu-114 as an example. This plane has a loaded weight of 68.1 tons (I could not find a max landing weight figure). I could not find how ...
DrZ214's user avatar
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4 votes
2 answers
450 views

Can Ballistic Parachute Recovery Systems be safely deployed in a storm?

Suppose the plane is in a thunder storm, and the pilot loses control of the airplane. Would deploying the ballistic parachute be a safe option? Meaning, is it likely that everyone would come out alive?...
D. B. Cooper's user avatar
13 votes
1 answer
2k views

When flying a glider in emergency situation, would it be more safe to bailout or to land in a forest?

Is there any consensus when it comes to this question? If it depends then it depends on what exactly? I'm interested in the decision making in this kind of situation.
Łukasz Zaroda's user avatar
0 votes
0 answers
145 views

Why no safety measures for air passengers? [duplicate]

Why have parachutes not been provided/safety measures taken in passenger carrying aircraft in case of a crash, so that at least they have some chance of survival? It's like you are stuck in a bottle ...
M.khan's user avatar
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17 votes
3 answers
3k views

Why is the drogue parachute jettisoned on the runway?

Why is the drogue parachute of a military plane jettisoned on the runway? Why not drag it to the parking area for safe removal, inspection, and repacking?
user avatar
15 votes
1 answer
6k views

Why is there a difference between military parachutes and those used for skydiving?

A couple hours ago I was watching a youtube video where skydivers jump using the skydive parachute, and after that, a military training where the soldiers jump using "old" type parachute, the dome ...
sharp's user avatar
  • 253
17 votes
2 answers
3k views

What is the purpose of the hole in the Cirrus SR22's parachute?

Watching this video I notice there is a big hole in the middle of the parachute, at its top when deployed. This feature seems to exist in other smaller parachutes. For me, it seems that air can ...
Manu H's user avatar
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25 votes
3 answers
5k views

Do any commercial airline models have a parachute at rear to help in landings?

Some land-based fighter aircraft have a drogue-chute to help them slow down during landing. Do any current models of commercial aircraft have a similar mechanism? Secondly, would such a mechanism ...
Firee's user avatar
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9 votes
2 answers
897 views

Could D.B. Cooper know where he was landing, when he parachuted?

The background story is a hijacking that happened 1971. The hijacker, referred to as D.B. Cooper, jumped from a Boeing 727 using the aft airstair. He knew in what air corridor he was (Victor 23, ...
Quora Feans's user avatar
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42 votes
4 answers
12k views

Do unused parachutes need to be repacked? If so how often and why?

I was reading some military fiction and saw a comment that army airborne operations were required to repack all parachutes every ninety days, allowing parachutes that were due to be repacked soon to ...
hildred's user avatar
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