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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 20:58 
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I wonder what the repack cost is going to be on that monster chute. It would be better if they sold the chute as an option.


Of course the chute and SE jet engine is the entire point of the plane.


agree about SE jet, disagree about the chute.
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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 20:59 
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In the FWIW department, out of 57 successful pulls, only three landed on the gear.

Water, trees, marshes, lots of stuff.



How many of these planes were put back in service?

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 21:09 
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Username Protected wrote:
I wonder what the repack cost is going to be on that monster chute. It would be better if they sold the chute as an option.


Of course the chute and SE jet engine is the entire point of the plane.

You can't sell pu#%y to everyone and that's the best product going. :D

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 21:40 
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Mike - last time I looked, there were 14. Some others in progress.


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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 21:42 
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I think the least of their concerns with this project is reusability of the airframe, and should be from the buyers perspective as well. At that weight it makes a lot of sense to float it down in a vertical position for absorption of the Gs to pax backs. Just like a spaceship. Everyone living is the endgame, to hell with the aircraft as it should be.


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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 21:54 
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Username Protected wrote:

And why aren't the chute lines sucked into the engine air intake?

I don't know but I doubt they'd be this far along and have something as basic as that not already covered.


Started to say the same thing myself. Do those of you posting about the chute deployment really think they are so stupid they're not deeper into that subject than you've even thought about going? It's getting comical.

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 21:58 
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It's getting comical.


Hey, we have a bet on the line here. :hammer:

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 22:12 
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How many of these planes were put back in service?

Mg

I can't see them reusing a composite pressure vessel after it has taken a hard hit. Too much liability of future failure.

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 22:19 
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Username Protected wrote:
How many of these planes were put back in service?

Mg

I can't see them reusing a composite pressure vessel after it has taken a hard hit. Too much liability of future failure.


This is interesting. I don't know anything about the material science here but it was fascinating to see the flexible carbon fiber fuselage parts laying on pallets and having tremendous flexibility. Then when the fuselage is formed it is as inflexible as steel. Under tremendous G force will it shatter like a fishing rod or deform like metal?

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 22:23 
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This is interesting. I don't know anything about the material science here but it was fascinating to see the flexible carbon fiber fuselage parts laying on pallets and having tremendous flexibility. Then when the fuselage is formed it is as inflexible as steel. Under tremendous G force will it shatter like a fishing rod or deform like metal?

Heck if I know. I drill holes in the ground! :cheers:
But I would assume that it would spidercrack (That's a highly scientific oilfield term...), much like fiberglass does.

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 22:28 
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Username Protected wrote:

agree about SE jet, disagree about the chute.


That's interesting to me Adam as I think one of the preeminent features, from a sales point of view, of the SR series is the chute. There are many terrific design features of the plane but the chute is a huge marketing driver and sells a tremendous number of planes all by itself. In the jet I think the chute plays a similar role.

I think in terms of light jets that twin engines offers a better margin of safety than a SE jet with a chute but I'm not sure that passengers feel that way. My wife thinks "jet" is cool (not a clown plane in Jason's vernacular) but ANY plane without a chute is problematic for her as she is so sold on the concept. A think a lot of people who fly in (non pilots) Cirrus planes think the chute just about guarantees their safety (which I agree it does not). A JET with a chute is the ultimate for folks like that. So, many of their husbands, wives or employers will buy the SF50.

I don't think the other big argument in favor of an SE jet, OPEX, is the driver. In fact, I think Mike may end up having a point here. When you look at the costs in BC&A and Conklin and Dedecker estimates the difference in the SF50 projected costs and those of, say, a Mustang aren't a lot different and the SE turbo prop like TBM are better. But they don't have a chute…

The chute is a gigantic marketing tool.


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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 23:12 
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Username Protected wrote:

The chute is a gigantic marketing tool.


Marketing tool - yes; Safety tool - TBD

The profile of turbojet accidents is very different then single engine pistons. The #1 type of accident in turbojets is runway overruns. The chute doesn't help in the approach and landing accidents turbojet pilots have.

The type rating and annual 61.58 training will weed out many of the inexperienced pilot loss of control accidents. And the turbine engine should be much more reliable then a piston engine is.

I think a chute in a turbojet may be fighting the last war. We don't know what the accident profile of a SE VLJ will be. But if it follows the ME VLJs the chute will not have any where near the saves the Cirrus has.

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 23:15 
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I think a chute in a turbojet may be fighting the last war.

Perhaps we should think of it as fighting the only war that matters - selling enough aircraft to stay in business. Whether it actually saves anyone is probably fairly irrelevant.

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 23:36 
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Username Protected wrote:

The chute is a gigantic marketing tool.


Marketing tool - yes; Safety tool - TBD

The profile of turbojet accidents is very different then single engine pistons. The #1 type of accident in turbojets is runway overruns. The chute doesn't help in the approach and landing accidents turbojet pilots have.

The type rating and annual 61.58 training will weed out many of the inexperienced pilot loss of control accidents. And the turbine engine should be much more reliable then a piston engine is.

I think a chute in a turbojet may be fighting the last war. We don't know what the accident profile of a SE VLJ will be. But if it follows the ME VLJs the chute will not have any where near the saves the Cirrus has.


I agree with this assessment. Annual 61.58 training will do more to save lives than any parachute deployment.

Here are some interesting facts from Robert Breiling & Associates looking back on 10 years of accident statistics involving jet aircraft:

    The highest percentage of accidents occurs in the shortest phases of flight. For example, only about 1 percent of a total flight is spent in the landing phase, yet that phase accounts for nearly 50 percent of accidents and incidents. Conversely, the lowest number of accidents and incidents (less than 4 percent) happen during cruise, the longest phase of a flight.

This study shows that 77.2% of jet accidents occur during a phase of flight where the parachute would be of little use. That puts into question the usefulness of the parachute. To the newbie piston engine pilot, the parachute is a very relevant feature (engine failure, VFR into IMC, pilot error, fuel exhaustion, etc.). We would hope that by the time the Cirrus SEJ pilot get's into a jet, the pilot skill set is more developed and the type of accidents would fall more in line with these types of accidents.

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Last edited on 22 Dec 2015, 23:38, edited 2 times in total.

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 Post subject: Re: Cirrus SF50
PostPosted: 22 Dec 2015, 23:36 
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Username Protected wrote:
I think a chute in a turbojet may be fighting the last war.

Perhaps we should think of it as fighting the only war that matters - selling enough aircraft to stay in business. Whether it actually saves anyone is probably fairly irrelevant.


Ding ding ding

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