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PostPosted: Sat Sep 08, 2007 8:11 am 
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Wasn't the spar strap the fix installed after the failed wings? That's what I'm thinking I remember reading. Either way, the civil On-Marks & Ks are the sexiest of the A-26s, IMHO!



RickH wrote:
I'm not aware of failing wings on the Ks. The K had a steel spar overlay that beefed up the original extruded spar. The strap is clearly visible on surviving Ks.

Most don't realize that there were only 2500 odd A-26s built. Production was terminated along with most wartime contracts immediately after the end of the war. All of the A-26s in Viet Nam were WWII production and many had been flown in Korea and probably a few in WWII.


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PostPosted: Sat Sep 08, 2007 8:41 am 
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The K did come after the loss of several airframes.

The spar starp was one of the K mods. The overall K package was intended to give the A-26 an even bigger punch. Additional hard points were added as well as the tip tanks. Those mods alone, necessitated a spar beefup.

The original armament fit to the B/C models was two exteral hard points and multiple mounts for rockets.

The B wing carried 6 internally mounted .50s while the C wing could carry two pods mounting 2 .50s per pod. The B also had the provision to carry two bomb racks. Either model could carry 4000 lbs internal and 2000 lbs external.


Last edited by RickH on Sat Sep 08, 2007 9:28 am, edited 1 time in total.

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PostPosted: Sat Sep 08, 2007 8:46 am 
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I saw a video of a Lockeed Hudson doing that same thing. But as he pulled out his right wing broke off. The entire crew were killed.

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PostPosted: Sat Sep 08, 2007 8:54 am 
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Nathan wrote:
I saw a video of a Lockeed Hudson doing that same thing. But as he pulled out his right wing broke off. The entire crew were killed.

That was a famous accident to an RAAF Hudson in Australia.

It was a different aircraft type -

Flying in wartime -

Military load and operation -

The aircraft was found to have had a repair to a bullet hole in the wing structure that failed on the pull up.

Subsequent checks were carried out to RAAF Hudson wings and action taken.

Reference is the book 'The RAAF Hudson Story, Vol.1.'

The comparison is not in any way helpful.

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PostPosted: Sat Sep 08, 2007 10:27 am 
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I was just saying... :wink:

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PostPosted: Sat Sep 08, 2007 9:02 pm 
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famvburg wrote:
I always wondered about many of the civil versions that had the spar carry through structure replaced with a hollow structure to increase the interior space, how they held up structurally.
You are referring to the "ring spar." It was not hollow per se, it was circular so one could walk through the center of it. It basically carried the load around the fuselage barrel section rather than straight through the cabin.

There was also an AD note on the Invaders I believe to trim the lower fairings away where they touched the wing spar to prevent fretting corrosion. The spar cap was exposed at the same level as the wing skin on the invader.


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PostPosted: Sat Sep 08, 2007 10:13 pm 
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The spar on the Invader is a one piece extrusion. The fuselage ends end in big rings for the bolts connect to the center of the bombbay. The outbard end in a point about as big around as a pencil.


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PostPosted: Sat Sep 08, 2007 11:09 pm 
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RickH wrote:
The spar on the Invader is a one piece extrusion. The fuselage ends end in big rings for the bolts connect to the center of the bombbay. The outbard end in a point about as big around as a pencil.

Rick, are we sampling the grape tonight or did I miss the memo about "pirate talk"
Saturday night? :lol:
Will "City of Waco" be attending WOH this year? Those guys...whew! 8)

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PostPosted: Sat Sep 08, 2007 11:18 pm 
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RickH wrote:
The spar on the Invader is a one piece extrusion. The fuselage ends end in big rings for the bolts connect to the center of the bombbay. The outbard end in a point about as big around as a pencil.
You mean until the wing spar meets the center section (carry-through) spar? The "rings" for the bolts are called lugs (or clevises), that is not the ring spar I'm referring to. I think we have some conflicting terminolgy here. At least I'm confused now!


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PostPosted: Sat Sep 08, 2007 11:44 pm 
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I'm talking about the original configuration.

I guess you could call it the carry through. Looks like a big plate across the bombay. The wing spars come through the fuselage and terminate in big round holes. The big bolts go through the plate and the "rings"on the extruded spar. There's two for each wing, front and rear. I think I'm remembering it correctly, it's been about 17 years since I was in the bombbay. See 43-5696 in Warbids Registry.

No grape tonite but I did manage a single Margarita earlier ! :D


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PostPosted: Thu Sep 13, 2007 3:21 am 
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And here she is going over the top.


Image

T J

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PostPosted: Fri Sep 14, 2007 3:57 am 
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T J Johansen wrote:
And here she is going over the top.


Image

T J



I was about to repost my picture from another tread when I saw this post, so since that have been taken care of already I may add some other pictures taken at the same flight.

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This is the pic I use in my avatar. It was publiced in Warbirds Worldwide in 1992. Unfortunately this is a sh---y scanning from a printed version of the picture since Paul Coggan never returned the original Kodachrome slide despite the fact that I reminded him several times!

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Same manouver a second or two before the previous picture. Both pictures taken during climb from a veeery low level pass over the runway at ENGM (Gardemoen)

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Same flight again but earlier on a higher altitude. Probably earlier picture in the same manoveur as the inverted pic.

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Gaining some speed before we go "vertical". The manouver by the way was always a Half Cuban Eight. There's no reason to do a complete loop.

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On our way back after taking some pictures my pilot (Rolf Meum) unexpectedly started to do some rolls around the A-26 with the P-51 we used as a camera ship. (Yeah I know, it's a dirty job, but someone has to take the pictures!)

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Another flight a year later. This time picure taken from a T-6.

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Another time again, with me this time standing on the cargo ramp of a C-130.
Enjoy!


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