Has anyone ever looked inside a Cessna wing?
walter evans
the shop that had a cracked rear spar.
In all his AP years he never had much use for the "tin cans" so he showed me
the spar piece he removed. I'm not sure of the assembly, but somehow the
flap mounts the the rear spar too. It's just riddled with cracks.
The spar is aluminum thats .032" thick----HOLY MOLY!!!
It's made up of the web, about 5 in high, with a 1" piece top and bottom ,
bent at a 90 , with nut plates on it to take the skin.
But .032" thk!!!, Kind of like the stuff you put around your chimney to
keep the water away.
Well , Cessnas last a long time, and this one comes from the mid 60's, and I
guess the engineering is there,,,,,But live and learn.
walt
Paul Folbrecht
I'd be afraid to fly them. :-)
"walter evans" <wbee...@worldnet.att.net> wrote in message
news:rv308.351013$W8.13...@bgtnsc04-news.ops.worldnet.att.net...
Dan Luke
> The spar is aluminum thats .032" thick----HOLY MOLY!!!
Would you be happy if it were .064"?. Ever heard of a 172 breaking up in
flight?
Spar webs are designed to take loads in compression and tension - the
material doesn't need to be very thick but it MUST be light.
What caused the cracks?
--
Dan
N9387D at BFM
walter evans
Yes, I have heard of one breaking up in flight, but it was in adverse
conditions. Was a jump plane that every time he dumped the jumpers, he
would do a wingover and spiral to the ground. Of course this was total
abuse to the plane, and it's one in a zillion,,,,guess this is a tribute to
the engineers designing these things.
what caused the cracks? My AP told me, but I'm not sure I understand.
Think it's the point that the flap secures to.
walt
"Dan Luke" <c172rg...@bellsouth.net> wrote in message
news:u41r5o8...@news.supernews.com...
Dan Luke
> Yes, I have heard of one breaking up in flight,
Where and what year? If it was in the U. S. after 1982 the accident
report will be available in the NTSB database.
Jim Sokoloff
> Dan,
> Yes, I have heard of one breaking up in flight, but it was in adverse
> conditions. Was a jump plane that every time he dumped the jumpers, he
> would do a wingover and spiral to the ground. Of course this was total
> abuse to the plane, and it's one in a zillion,,,,guess this is a tribute to
> the engineers designing these things.
I've heard the claim (by Jon Frank or Steve Ells of CPA, can't
recall which) that "no strut-braced Cessna wing has ever failed
in flight". I can't begin to back up that claim, but I do give
quite a bit of credence to both of those guys, each of which has
forgotten ten times what I'll ever know about piston Cessnas.
Like some of the others in this thread, I'd like to see a link
to an NTSB report verifying the claim.
---Jim
Dale
jim_g...@sokoloff.com (Jim Sokoloff) wrote:
Yesterday I looked through all the 182 and 172 single fatalities on the NTSB
website and not a single one was an inflight break-up. Sounds like unknowning
myth/rumor/bs. I used to haul jumpers in a 182...wouldn't do a wingover but
would scream to the earth. I've done that about 1500 times now and nothing has
fallen off the airplane yet. <G> Nor does it place a great load on the airplane
as long as you stay within the operating limits.
> I've heard the claim (by Jon Frank or Steve Ells of CPA, can't
> recall which) that "no strut-braced Cessna wing has ever failed
> in flight". I can't begin to back up that claim, but I do give
> quite a bit of credence to both of those guys, each of which has
> forgotten ten times what I'll ever know about piston Cessnas.
>
> Like some of the others in this thread, I'd like to see a link
> to an NTSB report verifying the claim.
>
> ---Jim
--
Dale L. Falk
Cessna 182A
N5912B
There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.
http://home.gci.net/~sncdfalk/flying.html
walter evans
that it happened in the mid 70's in the area of Sommerset NJ.
walt
ps I've heard the story from more than one person over the years, so I
assume it did happen. Being a jump plane, probably was a 182.
"Dan Luke" <c172rg...@bellsouth.net> wrote in message
news:u41tfg8...@news.supernews.com...
Dylan Smith
<wbee...@worldnet.att.net> wrote:
>bent at a 90 , with nut plates on it to take the skin.
>But .032" thk!!!, Kind of like the stuff you put around your chimney to
>keep the water away.
Don't forget that what you were looking at is not the main spar either
(the strut attaches to the main spar).
--
Dylan Smith, Houston, TX
Flying: http://www.dylansmith.net
Frontier Elite Universe: http://www.alioth.net
"Maintain thine airspeed, lest the ground come up and smite thee"