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Airplane Parachute

Posted May 31, 2013 12:00 AM by joeymac

I was watching an episode of "How do They Do it" on, The Discovery Channel the other day about putting parachutes on airplanes. It's extremely difficult to put a parachute on a plane because for a person to safely descend jumping out of an airplane, the parachute has to be one hundred feet wide. So for a parachute to work on just a small aircraft, you're going to need a massive parachute which is going to take up a lot of room.

Aviation experts asserted that putting a parachute on a small plane could not be done. Ballistic Recovery Systems was a company tasked to create the first airplane parachute, by a pilot who survived a plane crash. They faced multiple problems in being able to accomplish this. First is weight, you need a very large parachute for an airplane, roughly 1,000 square feet. A parachute of that size with regular parachute nylon would weigh as much as a small plane. The company made the parachute out of a super strong light weight composite and the parachute strings out of a special kind of nylon that is five times tougher and one hundred times lighter than steel. The parachute weighs just 30 pounds.

The next problem is bulk. You can't strap a parachute pack the size of an elephant to the back of an airplane. The company devised a folding technique that minimizes the amount of space the parachute uses. Then a massive hydraulic press is used to compact the parachute. Under a force of more than 11 tons the folded parachute is as dense as a block of wood. Another challenge of the airplane parachute was getting it to unravel quickly. The longer it takes to deploy the less time there is to decelerate the plane. The engineers came up with the idea of blowing the parachute open with rockets. Custom made rocket motors employ two linked electrical detonators which are housed in the base of the rocket. A one pound explosive charge is added which, when detonated, forces the parachute open.

One last major problem in getting the parachute to work was the speed of the plane. If the chute opened too quickly it would give the airplane such a pull that the parachute itself could rip the plane apart. The solution to this problem is the "slider"; a simple ring of fabric that prevents the chute from opening fully at the start but then slides down allowing it to open wider and wider as the plane slows.

The parachute is added to the airplane in a way that it doesn't rip open the airplane. The nylon straps are built into the body of the plane. When the rockets deploy they eject a five foot thick fiberglass panel from the body of the aircraft. This design is intended to release the chute with no harm being done to the plane. More than 30,000 parachutes are now installed on light aircraft throughout the world and have saved over 200 planes and more importantly, the lives of many pilots and passengers.

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#1

Re: Airplane Parachute

06/01/2013 12:03 AM

At the bottom side of aircraft if you have an airbag it will keep the plane floating in water.

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#3
In reply to #1

Re: Airplane Parachute

06/01/2013 1:03 AM

It will keep it floating on land, too....

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#4
In reply to #3

Re: Airplane Parachute

06/01/2013 3:16 AM

I love it... GA

jt.

An Irishman goes to the registrar and says, I want to change my name please.
Are you sure? asks the registrar? Yes, certain he says. Ok, well what's your name?

Patrick, patrick shithouse he replies.

And what name would you like? asks the registrar.

Michael, he replies.

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#5
In reply to #4

Re: Airplane Parachute

06/01/2013 10:04 AM

Nice one! Permission to borrow sir?

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#2

Re: Airplane Parachute

06/01/2013 12:36 AM

It was demonstrated on small airplanes. Most of these types can get into a stall/spin situation from which there is no recovery, and the plane pancakes into the ground with great force. For that, and for control surfaces failure the parachute makes the event survivable. Not comfortable, like a personal parachute landing.

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#6

Re: Airplane Parachute

06/01/2013 12:04 PM

I think that there may be a few transcription errors in this story. " . . . for a person to safely descend jumping out of an airplane, the parachute has to be one hundred feet wide." I've never seen one nearly that large - and I've jumped, myself (only static line jumps, so far).

Next, "The solution to this problem is the 'slider';" makes it sound like BRS invented the slider for this purpose, but it is seen on ordinary recreational jumping chutes - in fact, when I hear the rippling/flapping sound of one where I live, I know to look up to see jumpers from a nearby airport with a jump center. Parachutes are NOT silent!

". . . they eject a five foot thick fiberglass panel from the body of the aircraft." Five feet long I'd believe; five feet wide wouldn't be possible on many small aircraft; five feet THICK - no way!

I have quibbles with the description of the special Nylon as being ". . . five times tougher and one hundred times lighter than steel." "Tougher" gets defined too many ways for this to stand alone, and something that was "one time lighter than steel" must weigh nothing at all; saying that it is "one-hundredth the weight of steel" would still require a qualifier as to the basis (density? weight of it needed to resist a given tensile force? Those are the obvious choices, with the latter clearly more likely).

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#7
In reply to #6

Re: Airplane Parachute

06/03/2013 8:59 AM

Re: "there may be a few transcription errors in this story"...

How about the comment:

"you need a very large parachute for an airplane, roughly 1,000 square feet. A parachute of that size with regular parachute nylon would weigh as much as a small plane."

A 36' diameter chute is all it takes.....for a small plane.....?

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#8
In reply to #7

Re: Airplane Parachute

06/03/2013 12:52 PM

I do think much was lost or corrupted in translation. I can only imagine what it would have looked like if my canopy were a 100 ft wide after exiting the 130. I'm not sure my lard ass could even inflate a canopy of that size. Just think of how long the suspension lines would have to be. For combat jumps you would hit the ground before you snapped the canopy from the D-bag. One, one thousand, two one thousand, three one, . . oooooomph.

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#10
In reply to #8

Re: Airplane Parachute

06/03/2013 1:53 PM

"Amen" to that ... ... (August 1978, here... "those were the days, eh!?") ~ from "Airborne!" to "Diver-on-bottom" ... what a change! Looking-back at my youth, I feel a 'kinship-of-sorts', to those old codger characters in "Space Cowboys"...

( Just ain't the same, being relegated to a desk-job nowadays...)

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#14
In reply to #10

Re: Airplane Parachute

06/06/2013 1:40 PM

. . . my friend, we thought they're never end. We'd sing and dance . . . (Mary Hopkins version is the one I remember.)

Yeah, yeah, I know I'd dating myself.

Yeah, 1984 seemed like a long time ago in a galaxy far far away . . . from what I do now. But interestingly enough, the pilots would play Van Halen's hit from that year over the crappy sounding intercom system just before we would enter either the Normandy or Holland DZ's at Bragg. (Jump !!)

. . . if my 'chute don't open wide, . . . the hooh-ah stuff comes back far too easy.

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#15
In reply to #10

Re: Airplane Parachute

06/06/2013 4:17 PM

Tom, you were Airborne too? What PIR?

I served with the 506th PIR, '76 & '77, followed by Ranger School and 2/75 @ Lewis. RLTW!!!!!

Gotta love those old T-10B chutes....

Anyhow, we most likely ate the same DZ dirt! LOL

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#16
In reply to #15

Re: Airplane Parachute

06/06/2013 7:47 PM

I pinned on the wings in '84 but never served in an Airborne unit (until much, much later downrange with USACAPOC as a reservist-not jump status though). Back when I was active duty (11 yrs), I was shunted off to work as a SigO for intel folks in another part of the country, then other non-traditional stuff except a stint as a Bn S-4 in ROK. 5th SF Group (not black hats), under Benning's supervision, taught the course at Bragg. You did the serious hard-core stuff. I'm not sure I would have made it through Ranger school. A tip of the hat to you. You have my respect for surviving all that, and then serving with the 2d Battalion at Lewis. I hope your knees held out.

Yeah, T-10Bravos were easy enough, but man, even when I was 175 lbs., I still hit the ground like a ton o'bricks. I felt bad for the big guys over 200 'cause they were screwing up knees and ankles left and right. Especially on the Holland DZ because that place was rough. Normandy DZ was a much better DZ for landing. A lot more sand. Still a cherry. At least as far as Uncle Sam is concerned.

I preferred the jumps we made with the MC-1 because at least that way we could face into the wind and not end up performing a 3-points of contact PLF (heels, ass, head) if you got unlucky enough to be blown backwards on the T-10 and you couldn't pull enough slip to get yourself around in time.

I have a few more take-offs than landings in a Cessna 172. That was fun when I was a younger punk. Haven't had to urge to go back to a DZ. My oldest daughter was enrolled in AFF for a while. I think the money squelched that for her. She may go back when her money situation improves. She's a 68WM6 in the Reserves (LPN). Good soldier, but she'll do better to stay leg.

Cheers !

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#17
In reply to #16

Re: Airplane Parachute

06/06/2013 10:33 PM

I pinned on the wings in '76. Always glad to run into another Airborne Troop! :-) So, you were a Commissioned Officer too, serving as a Bn S-4 eh? Kewl beans man, especially in the ROK. You must've seen a lot of time on the DMZ there. Scary place, and you have me respect for just serving there alone! So you served in Civil Affairs and Psych, eh? That must've been pretty interesting duty, for sure! Since you were with 5th sOG, you may have run into a buddy of mine while at Bragg. Do you know Howie Keene by chance?

I tell ya, Jump School at Benning was a cake walk compared to Ranger School. I almost flunked out because I nearly drowned in the freaking Chattahoocee River! LOL Serving in the Rangers was awesome. OP Urgent Fury on the other hand was a total ClusterFuk with screwed-up tact radio freqs, no grid maps (only old and basic tourist maps), typical Washington DC screw-ups coordinating or relaying vital info and Intel, and not all the St. George Medical Students were at the Blue Campus! On top of all that, the freaking Cubans knew we were coming no thanks to the media jerkoids. Making a combat jump onto Pt. Salienes Airfield at 0530 (basically the break of damn there on Oct. 25) was a major tactical error...we lost the element of surprise w/ no darkness, hence the 500' AGL jump to get the 130's under the Cuban's Quad-four AAA setup on the surrounding hills. I was a very green 2nd LT then. Anyhow, we still received a lot of small arms fire that punched holes in the fuselage. Kinda unsettling to be sitting in a cramped darkened C-130 Herky Bird and all of sudden little rays of light start emminating from the a/c's walls because of hits.

Anyhow, I later served in the USAR for 8 years: 464the Engineering Bn, Schenectady NY. Did the Big Beach Ball Party in SA commanding a Reinforced Engineering Company (my Company, Bravo + 2 Platoons from Alpha Company/464th Bn) attached to the 2nd ACR. We breached the paralleling two berms along the Saudi-Iraq border for those bad boys, as well as providing mine clearing. Saw a lot of action in support of the Cav, including taking the Iraqi Airfield at Tahil. After DS/DS i Resigned my Commission, even though I was on the O-4 Promotion List. My X didn't want to hear it that I wanted to put in another 5 years to get my 20. Long story, best told over a few cold ones some day!

I hear ya on those T-10's, even the D models. Forever twisting in the wind! LOL At least with the new MC1 chutes you can steer it much better, and with less oscillations. I never did get around to jumping with one of them...after my time.

No, my friggin' knees give me nothing but pain from all of those jumps, especially on cold days and whenever it's going to rain or is very humid out. I should have knee surgery, but I detest going to the VAMC for anything. Give me a private doctor any day!!!! What bothers me more than anything is where I broke my right ankle landing in a freaking pine tree because the damn Jump Master screwed the pooch misreading the wind speed and shifting direction.....me and half the stick landing in the trees. If a bunch of Grunts could kill. I'm sure you know what I mean! ROTFLMAO

I did do some private jumping up until about 8 years ago, then my health went south and I got heavy. These old bones can't take the punishment anymore. Besides that, I'm pushing my luck if I continue jumping out of perfectly good airplanes! I have to live long enough to walk my 2 daughters down the aisle and see their kids born!

Congrats and thank you to your daughter for serving! She'll do well, unless O-Bozoman continues to kill/destroy the military. My only son is now serving in the USAF in the Security Forces, A1C, at Dyess AFB. He's been guarding the B-1B Lancers on the flightline. Next month he deploys to Qatar. At least I got to see him when he came home last week on his first Leave, even if it was a short 7 days. I rarely saw him because he was his girlfriend or his buddies most of the time! hahaha

Well, gotta go hit the sack now, as it's been a long long day here! Glad to have met another Airborne Brother!! AIRBORNE ALL THE WAY!!!!!!!

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#18
In reply to #15

Re: Airplane Parachute

06/07/2013 12:40 PM

Regrettably , by 'training/certificate' only (Ft Benning--31Aug78), following ROTC Advanced Camp at Bragg. I was the *only* one (at that time) to have EVER been sent through both courses after freshman year only...

Also...(regrettably), the Army did *not* come through with the ROTC scholarship that I'd been *promised* ... which had been the "impetus" to quit my job at the G.E. plant and transfer from my (Reserve) unit (4/92nd FA / 8" Howi's) INTO the ROTC program. (BTW, it had nothing to do with grades, it was a 'few-months-AGE' issue...!)

"Long story short", having NOT applied for any kind of student aid (having been *promised* the scholarship), and having spent every dime I had to pay my own way through that first year ... in the absense of any possible financial assistance (trust me, everyone was *looking* for a way!), I was forced to 'accept' a 256A... (())

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#9
In reply to #7

Re: Airplane Parachute

06/03/2013 1:21 PM

BRS (Ballistic Recovery Systems) sells quite a few models, in various sizes, with different load and speed ratings. A 36 foot diameter one is rated at 1050 pounds and 137 mph. The one that the Cirrus (as shown in the opening photo on this thread) uses, I think, is the BRS-172, rated at 2250 pounds and 187 mph; it is 55 feet in diameter (quick reality check: the wingspan of the plane is 36 - 38 ft.; compare to canopy dia.). A table showing much of the info can be seen at: http://brsparachutes.com/files/brsparachutes/files/BRS%206%20Specifications.pdf. My airplane (currently several years from completion) could use the 800 pound, or maybe even the 600 pound size.

I didn't try to point out all of the possible errors - I'd only be seen as nit-picking. For example, the "straps embedded" into the plane represent only one of several different mounting systems available, and the cover panel may or may not be fiberglass. I wonder if the several-times-normal-strength "Nylon" is actually some other fiber, or a combination of filament materials.

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#11

Re: Airplane Parachute

06/03/2013 10:30 PM

Amazing I love it!

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#12

Re: Airplane Parachute

06/05/2013 7:47 AM

Sorry, but this article is full of errors....errrrr, "holes" regarding modern parachutes.

Signed,

CaptMoosie, former CPT, U.S Army Airborne & 2/75 Rangers

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#13

Re: Airplane Parachute

06/06/2013 9:33 AM

Please read:

"Pilot, 76, walks away from plane crash with just minor injuries after deploying emergency PARACHUTE which allowed his light aircraft to float to safety in a quiet Cheltenham back garden."

Read more: http://www.dailymail.co.uk/news/article-2336815/Pilot-76-walks-away-plane-crash-just-minor-injuries-deploying-emergency-PARACHUTE-allowed-light-aircraft-float-safety-quiet-Cheltenham-garden.html#ixzz2VRVuVIBa

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#19

Re: Airplane Parachute

06/07/2013 10:55 PM

If parachute or air bag cannot withstand the impact of landing,try small rockets mounted around the aircraft to slow it down vertically without impact like moon landing.

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#21
In reply to #19

Re: Airplane Parachute

06/11/2013 12:00 AM

"...try small rockets mounted around the aircraft to slow it down vertically without impact like moon landing."

Do you understand that this is for aircraft which are out of control, or otherwise in imminent danger of crashing? They could be rolling, spinning, missing wings or control surfaces, or have, say, a control surface stuck into a locked position. Any rockets would need to have the ability to correct the attitude, roll, pitch, and/or yaw rates, account in real time for distance to terrain, and for the actual current weight of the aircraft and its contents. This means that they'd need a complete computerized control system entirely independent of the aircraft's own electronics, with self-contained power supply, radar or other speed- & distance-measuring system, and much [MUCH] more If whatever disabled the aircraft affected any part of the rocket-&-control system, it would fail. And, it would be a commercial and engineering failure if it weighed more, or cost more, than the parachute-&-launch device The "KISS" principle applies.

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#22
In reply to #19

Re: Airplane Parachute

06/11/2013 12:07 AM

Rockets will assure that the aircraft will reach the scene of the crash site, already on fire.

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#20

Re: Airplane Parachute

06/10/2013 9:03 PM

"There have been 45 known CAPS events as of 6 June, 2013."

"As of 6 June 2013, there have been 34 saves with 70 survivors in aircraft equipped with the Cirrus Airframe Parachute System (CAPS)."

From: Cirrus Airframe Parachute System (CAPS) Deployment History ...

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