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B-17G 44-85813 Update: August 17, 2023

B-17G 44-85813 Update: August 17, 2023

The restoration of B-17G 44-85813, otherwise known as Champaign Lady, continues to make solid progress at Urbana, Ohio. The decades-long effort by the Champaign Air Museum is now concentrated on the rebuilding, really re-creation, of the wing sections, both inboard and outboard. The fuselage itself is nearly structurally complete. The restoration project began in 2005 by Jerry Schiffer, who shortly afterwards was killed in an airplane accident. However, his three adult children (Dave, Eric, and Andrea) took up the project and have driven it forward over the past eighteen years. The large volunteer team under the direction of project manager Randy Kemp will complete the rebuild of the B-17G to airworthy condition.

As a recap, the project began as the compilation of the remaining sections of several B-17s. The fuselage was rebuilt from parts of B-17Gs 44-83722 and 44-83316. The inner wing panels came from 44-85813, and the outer wing panels from 44-83722. The vertical stabilizer came from 44-83525. The nose compartment and the radio room compartment had to be built as new structure. The other subassemblies and components have been gathered from many different sources from around the world. Because a large part of the airframe came from 44-85813 and that airframe had the documented civil history of N6694C, this airplane is moving forward as the restoration of 44-85813 under the new civil registration of N3154S. The long history of this B-17 which, by the way, was one of the three post-war five-engine test-beds, is told in words and photos in Final Cut: the Post-War B-17 Flying Fortress and Survivors.

The last major fuselage structural section of 44-85813 that remains to be completed is the wing-carry through structure in the bomb-bay. The lower tubes of the compression trusses have yet to be attached. Eventually, the bomb bay doors will be attached to this lower structure.

Since the inner wing panels are a high-interest B-17 topic these days, it is interesting to take a closer look at what the Champaign Lady team is doing. As it happened, 44-85813 (operating as N6694C) was severely damaged in an April 1980 accident at Bear Pen, South Carolina, while operating as an air tanker. The fuselage was largely burnt out. The wings, though damaged, were relatively intact.

The right wing of 44-85813 as seen near the Bear Pen, South Carolina, airport in February 1988. After the April 1980 accident, the airframe was pretty much bulldozed off the airport and left. Back in those days, B-17s were obviously not as valuable as they are forty-plus years later. Strangely, the NTSB has no record of the B-17 accident so details of what brought the B-17 down are elusive.

Beginning in 2012, the right inner wing panel was disassembled by the restoration team. Disassembly meant very carefully drilling out thousands of rivets that held the skin, spar structure, supporting ribs and other components together. The engine nacelles were similarly removed and disassembled. As components were inspected, an exacting rebuild was begun in a fixed structure to ensure alignment and exact fit. The original spar tubes are being used after being thoroughly inspected. Some repairs were needed whereby new material was spliced into the existing spar tubes as per the original USAF (Boeing-written) technical order for wing repairs.

Closeup view of one of the spar tube splices on the right wing aft lower spar. There is a solid bar inside the tube and the external doublers added to the outside…all carefully done in accordance with the USAF Structural Repair Instructions for the B-17G.

Most of the supporting spar trusses have been re-manufactured from the Boeing specifications, as were the ribs. So, after eleven years of work, where does the right wing inner panel stand? Most of the underlying structure is completed and the corrugated sub-skin is being manufactured where needed, otherwise, original sub-skin is being used. The leading edges are being attached, as is the trailing edge assembly. The nacelles are rebuilt and ready to go back into the wing. The right main landing gear support is mounted in the wing structure. The wing still has a long way to go, at least by outward appearance, though most components are rebuilt and ready to be reassembled.

An overall view of the restoration floor with the right wing inner section seen in the foreground. The green corrugated sub-skin covers the area between the forward and aft spar assemblies. The aft section of the wing is attached to the rear spar and eventually will have the right flap attached.
A closer view of the right wing inboard section under rebuild. Looking closely, one can see where the two engine nacelles will attach (engine #4 where the blue stepladder is seen). The corrugated sub-skin added much strength to the B-17 and allowed it to absorb much combat damage. The exterior wing skin will be attached over the corrugated sub-skin.
The four engine nacelles with engine mounts rebuilt and ready for installation on the inner wing panels.
The right main landing gear support structure in place on the lower wing.

Meanwhile, work is just getting started on the left inner wing panel. The panel has been completely disassembled and spar tube repairs are underway. It appears only one section will need to be spliced with new material. The spar tubes will then be reassembled into the spar structure and the wing re-construction will begin in the dedicated wing fixture. Many of the needed components have already been built or rebuilt, and it is hoped that the learning curve achieved with the right wing will allow the work on the left wing to go much faster.

The beginnings of the left wing inner section rebuild. The aft spar assembly is in place. The forward spar assembly is on a work table being readied for installation. A spar tube splice is required and that is exacting work that is currently underway. When completed, the forward spar assembly will go into the blue fixture and the work started to build up the wing structure between the spars. The right wing inner section has taken eleven years so far, with a couple more to go. It is expected that the left wing will go quicker with the learning curve already climbed.
Anyone wonder what a cross-section of a B-17 spar tube looks like…well here you go. This section was cut out of a tube near the inboard end. The challenge in re-creating the twenty-five foot long tubes is that, though the outer dimensions of the tube remains the same, the interior dimensions taper to thin the tube material from the inner end to the outer end. This was most likely done by Boeing engineers circa 1934 to save weight and still maintain the desired strength of the part. The spar tubes used in the rebuild of 44-85813, however, are the inspected and repaired original ones that came with the original 44-85813 wing sections.

It should be noted how exacting the work on the wings are. Most of the spar components are riveted to the spar tubes, a complicated process. How does one buck rivets inside a small, twenty-five foot long tube? It’s not easy but the Champaign Lady team has figured out how to do it. Any tiny mistake, however, can greatly multiply the work required, so great care is taken to get it right the first time.

Both outer wing panels, as noted earlier, have come from atomic test target 44-83722. This airplane was dragged off the Nevada Test Site in 1965 and subsequently used for parts to support air tankers. The outer wing panels were intact but did suffer from damage during the several nuclear tests they endured.

The left outer wing panel as seen in October 1987 while owned by Kermit Weeks and stored at the Aero Trader storage yard at Borrego Springs, California. 44-83722 was a former SB-17G air-sea rescue aircraft before being sent to the Nevada Test Site use as a target in a nuclear test series in the early 1950s.
The right outer wing panel from 44-83722 under rebuild. The “Champaign Lady” team has had to reverse-engineer in order to create new corrugated sub-skin sections to replace damaged or otherwise unusable sections.

The two outer panels were de-skinned, inspected, and are now receiving the corrugated sub-skin before the final aluminum-alloy skin is riveted into place. Ailerons and flaps are ready to go back into the wings, as are all the little fixtures and pullies and do-dads that need to be installed for all the necessary controls and other systems.

Hand built engine cowlings are completed and ready for installation. The skill and patience required to produce such complex shapes out of sheet aluminum is amazing.

Overall, the project is immense and impressive. Unless one digs into the intricacies of what is involved with restoring—or building—an airplane the size of a B-17, the true scope of the task cannot begin to be appreciated. Hats off to the team of volunteers rebuilding this airplane. It will fly one day…when that might be is still many years off in the future. In the meantime, it is a fascinating project to watch and support. Speaking of donations…yes, everybody can pitch in to keep this project moving. The Champaign Air Museum has a dedicated webpage with more information.

The forward fuselage is externally complete. Most aircraft systems such as electrical, hydraulic, and control cables have yet to be installed and most will wait until the fuselage is joined at Station 6 and/or the inner wing panels are attached and the airplane is up on its landing gear.