Warbirdsim : B-25J Mitchell Development !!!!

Posted on the SOH forums are the following renders of their latest in development aircraft namely the FSX/P3D B-25J Mitchell . Looks Very nice indeed !!! He is the text that accompanied the post : We quote :-

Our goal is always to strive for the highest attainable lever of accuracy in our aircraft, and for this project the base model was lofted from the original North American Aviation blueprint ordinates, resulting in the overall skin of the airframe being accurate to the same 1/1000 of an inch measurements of the real aircraft, at every key station, nose to tail, wing root to wing tip joint, and the entirety of the tail surfaces – you can’t get any more accurate than that! Everything else, produced by North American, has been built completely to the blueprints with the same level of accuracy/precision. The wings and tail surfaces of course have all of the precisely accurate airfoils as that of the real aircraft, and like many aircraft of the era, there are two different airfoil designs incorporated in the wing, transitioning from a conventional thick airfoil at the root to a thin concave airfoil at the wing tip joint (which actually resembles an airfoil of the WWI-era). Both the tail surfaces and the wings are mounted at the correct angles of incidence in relation to the fuselage. The lateral angles of the wing arrangement, producing the gull-wing shape, are accurate to what is called out in the drawings, including the precise angle and location at which the outer wing and inboard wing sections and skins meet at station 157.

Here are just a few examples illustrating the precise nature of this model down to the smallest detail:

– The exact widths of each section of framing for the windscreen, nose, canopies, waist gun windows and turret are each individually accurate (3/4″, 1″, 1-1/8″, 1-1/4″, 1-1/2″, 1-5/8″ and 1-3/4″), and most importantly those dimensions are maintained through all of the curvatures of the framing.

– Not only the length and widths of individual parts, but the exact widths of spacing called out in the drawings between every joint/intersection of the control surfaces, landing gear doors, bomb bay doors, entry doors, emergency hatches, etc., are depicted.

– Accurate to the real design, the main engine cowling isn’t symmetrically round as it may first appear. As it tapers back from the forward cowl ring, it becomes elongated along the bottom and rather flat along the top.

– Each cowl flap is accurate in individual width and length – there are several different sizes of the cowl flaps. Whether opened or closed, they also have the proper amount of spacing between the inner side of the cowl flap and the outer surface of the inner cowl ring.

– Contrary to most depictions of the B-25J, the cowling was not a mirror image from the left to the right, it was the same unit mounted on both sides – so the unique arrangement of the exhaust stacks are not mirrored, nor is the unique arrangement of the cowl flaps – for instance, one cowl flap in particular is about 3-inches larger than the rest, and can be seen on the outboard-facing side of the left engine cowl but on the inboard-facing side of the right engine cowl.

The Hamilton Standard prop hubs are the correct 23E50 type and the blades are the correct (quite massive) 12-ft 7-in diameter 6359A type. The turret (only the shell made thus far) is accurate to the late Bendix type installed on the B-25H and B-25J and has all of the proper contours from which ever direction/side you look at it (a rather complex unit). I haven’t begun really working on the armament yet, but the gun barrels you do see are modeled to the correct dimensions based on accurate plans drawings for the Browning .50-cal machine guns (that I picked up when I was working on the gun bay details of our P-51D’s). The blast shields on the top turret barrels are a North American part and therefore modeled to the drawings, and they fit just like a glove over the barrels. I have yet to begin working on the Bell M-7 tail turret gun mount, but for that I do have design plans to go by. The R-2600’s will be added shortly as well as the various antenna equipment.

What you see built thus-far is representative of a mid-production B-25J. Going forward, we may include specific production variants with individual production changes. In addition to the stock-production engine cowling/exhaust/carburetor scoop arrangement, we are also working right now on reproducing the larger post-war Bendix-Stromberg carburetor scoop and exhaust collector ring modifications for more options/different configurations (post-war service and modern restorations). In the near future we will also be adding the 8-gun “strafer” nose. For now our focus is just on the J-variants, but the B-25H will certainly be in our sights in the future.

We will keep you posted on continuing progress – the external model, base textures and materials are scheduled to be finished by the end of the year (and in-sim), followed by the start of the VC next year. With a good amount of motivation, the P-39 will be completed within the year ahead as well (really very little major left to do, and we now have more resources than ever to finish what is remaining).

Renders :

Source : SOH Forum Post