We appreciate the support from readers like you at Foxiz. Through your purchases using the links on our site, you empower us with affiliate commissions.
Skins assemblies on the 'Birdcage' Corsair's center section are now undergoing final-fitting and riveting, as can be seen here on the starboard wing stub with assembly VS-15589 clecoed in place. (photo via Vultures Row Aviation)
SHARE
Over the past couple of years, we have been following the restoration of an extremely rare ‘birdcage’ variant of the Vought F4U-1 Corsair (BuNo.02449) undergoing restoration to flying condition at Vultures Row Aviation in Cameron Park, California. Quite a lot has taken place since our last update in September, and we thought our readers would be interested in seeing some photographs describing the latest efforts.
An overview of the Vultures Row Aviation workshop showing the various Corsair projects underway at Vultures Row Aviation. Not everything here has been done in house, but it is an amazing sight to behold. The wings in the foreground belong to Jim Tobul’s F4U-4 “Korean War Hero”. That aircraft is presently flying with metalized wings, but these more appropriate, fabric-covered examples will be returning to the airframe in due course. (photo via Vultures Row Aviation)
Skins assemblies on the ‘Birdcage’ Corsair’s center section are now undergoing final-fitting and riveting, as can be seen here on the starboard wing stub with assembly VS-15589 clecoed in place. (photo via Vultures Row Aviation)
A similar situation is true for the left hand side of the center section. (photo via Vultures Row Aviation)
The center section leading edge assemblies are now coming together. Here we can see the salmon-colored end rib (VS-10704) undergoing installation. (photo via Vultures Row Aviation)
A similar situation is taking place on the right hand center section leading edge assembly, as seen here. (photo via Vultures Row Aviation)
Here we can see that most of the rivets and screws have been driven home on the center section left hand leading edge assembly. The oil cooler assembly will fit within a housing at the left side of the image here. (photo via Vultures Row Aviation)
And again, as similar situation is true for the right side of the center section. (photo via Vultures Row Aviation)
The salmon colored parts in the foreground are the landing gear knuckle forgings which mount in the forward end of each center section wing leading edge. The bronze components in front of these thread into the knuckles and allow the main landing gear legs to rotate back and forth between their stowed and extended positions. Of the latter components, the item on the left is of new manufacture, while the one on the right is a reconditioned original. (photo via Vultures Row Aviation)
Some of the freshly anodized fittings for the airframe. (photo via Vultures Row Aviation)
A closeup shot of some of the fittings showing just how complex their forms are to replicate. (photo via Vultures Row Aviation)
[wbn_ads_google_one]
Work is continuing on the center section, which is progressing very nicely now as you can see in the images above, but of significant importance, the aircraft’s Pratt&Whitney R-2800-8 Double Wasp engine recently made its first trial runs on the test cell at Anderson Aeromotive in Grangeville, Idaho. The R-2800-8 was the first production model for the Double Wasp’s B-series and produced in relatively small numbers (fewer than 4,000 units). ‘Birdcage’ Corsairs used this early variant of the famous powerplant, which is now almost as rare as the aircraft itself. The earlier engine is significantly different to the far more available R-2800-8W which most later variants of the -1 Corsair used, with a primary variation indicated by the ‘W’ suffix which refers to Water Injection. To inhibit detonation at maximum power settings, a pilot could inject a water-methanol mix into the engine, thus allowing greater performance (for short bursts). Obviously, this was a desirable feature giving pilots an edge over their opponents, so the earlier, non-water injected engines were soon rendered obsolete during wartime. As a result, the R-2800-8 is now a very rare engine indeed, and it is likely that Vultures Row’s example will be amongst the first of its kind to power an aircraft since soon after the end of WWII. As such, it will be a real treat to hear this engine run; it has a unique howl which you will be able to appreciate in the videos further down this page.
The R-2800-8 on its stand at Anderson Aeromotive. (photo via Vultures Row Aviation)
A view of the R-2800-8’s accessory section. (photo via Vultures Row Aviation)
Another view of the accessory section at the back of the Double Wasp. The black cylinder protruding from the end is the electric starter motor. (photo via Vultures Row Aviation)
A closeup of the brand new cylinders on the engine. Note the silve CAD I plated hardware. The rather worn looking Lord mounts you can see just before the cylinders are just house-owned examples for Anderson Aeromotive to attach the engine to their test station (which you will see in later images). (photo via Vultures Row Aviation)
A view of the front end for the engine. Note the braided copper leads from the ignition harness. (photo via Vultures Row Aviation)
Vultures Row Aviation had authentic data information plates made for the engine – this one describes in formation for the Spark Plug Leads. (photo via Vultures Row Aviation)
And here the newly-made data plate describes the shield assembly specs. (photo via Vultures Row Aviation)
This is a view from inside the engine test cell. (photo via Vultures Row Aviation)
Another view from inside the engine test cell control cab. (photo via Vultures Row Aviation)
A view of the dash board in the engine test cell, with the guages registering engine performance. (photo via Vultures Row Aviation)
The R-2800 mounted in the engine test cell. Note that the exhaust stacks are not Corsair units, merely substitutes to allow appropriate back pressure for the testing to take place. (photo via Vultures Row Aviation)
Vultures Row describes their efforts to resurrect this long-forgotten variant of the Double Wasp as follows: “It’s taken years to acquire all of the correct parts for this unique engine. Lots of NOS [New Old Stock] parts… never run cylinders that still have the original P&W paint at the base. [There are] also NOS internal clutch parts only used on this version and NOS baffles with original inspector and part number stamps.”
[wbn_ads_google_one]
Commenting on the images of the engine above, Vultures Row also remarked: “Notice also the copper braided NOS spark plug wires and the early version primer system feed from a spider… not injected into the carb [but] rather injected into the cylinders directly. We also have a NOS [magneto] harness and have made all new placards that attach to the blower section for the clutches and other items. It’s as perfect in every aspect as it can be for an 80 year old engine.” You will note also that the unpainted fastener hardware on this engine has the early style silver-colored CAD I cadmium plated finish which was typical for the period, rather than the more-available gold-colored CAD II finish which most aviation-grade fasteners wear these days. While this may seem like an insignificant detail, it does lend the project additional authenticity, which is what Vultures Row is striving for. We feel sure that our readers will appreciate this endeavor.
The first engine run features in the rather blurry video below, captured from within the test cell. It is apparently the first time this engine has run in 78 years!
The second engine run appears below. So far the team has run the engine for about two hours, with another four, trouble-free hours to go before the engine is ready to ship. You will hear the distinct sound this non-water-injected Double Wasp exudes more clearly in this video, which also features the change in engine note when the operator engages the low speed setting on the two-stage supercharger around the sixteen second mark… it is a unique kind of howl, which is sure to engage air show audiences!
Richard Mallory Allnutt's aviation passion ignited at the 1974 Farnborough Airshow. Raised in 1970s Britain, he was immersed in WWII aviation lore. Moving to Washington DC, he frequented the Smithsonian’s National Air & Space Museum, meeting aviation legends.
After grad school, Richard worked for Lockheed-Martin but stayed devoted to aviation, volunteering at museums and honing his photography skills. In 2013, he became the founding editor of Warbirds News, now Vintage Aviation News. With around 800 articles written, he focuses on supporting grassroots aviation groups.
Richard values the connections made in the aviation community and is proud to help grow Vintage Aviation News.
BAD ASS
I’m in awe, my dad flew one of these as a Marine during Korea.
Very cool! Yes, distinct. Excited to hear it when it gets airborne.