![]() While Boeing is one of the world’s leading aircraft manufacturers, it’s interesting to learn that the Seattle planemaker also operated its own airline. To service the route, Boeing built 24 Model 40s before enlarging the cabin to carry four passengers on its latest variation, the Boeing Model 40C, which had a new 525 hp Pratt & Whitney Hornet radial engine. The fuselage was also redesigned, and an enclosed cabin was fitted between the mail compartments, allowing two passengers to be transported along with 1,200 lbs of mail.Īfter placing a bid of $3.00 per pound, Boeing was awarded the San Francisco to Chicago route. For the new variant, Boeing replaced the WWI engine with a lighter, more powerful 425 hp air-cooled Pratt & Whitney Wasp radial. Boeing decided to bid for the western routes and modify the design of its Model 40. The plane was then later improved upon and called the Douglas M-2.Ĭongress passes an act to privatize air mail routesĪt the same time as the post office was buying the Douglas M-2, Congress decided to privatize the post office’s air mail route monopoly and passed what became known as the “Kelly Act.” Split into two east and west sections. While Boeing was working on the Model 40, Douglas modified its Douglas O-2 observation biplane, renaming it the DAM-1 (Douglas Air-Mail-One). Despite the prototype being bought by the post office, the Douglas Aircraft Company won the purchase order. I only put glue when I join parts of a long strip.Fitted with a conventional landing gear, the Boeing Model 40 first flew on July 7, 1925. With 5mm radius, you already need a strip of paper 683mm long! Just a tip: I found out that ordinary 80g/m2 paper has a thickness close to 0,115mm. Calculate a few points in a spreadsheet, put them to (real) paper and that is it! This means that, when the strip length is l, its depth should be y. The area for a circle with r radius is equal to 3,14 x r x r. Taking e as the paper thickness and l as the strip length, the area is e x l. The relation between the paper strip length and r is very simple and depends only on paper thickness, having in mind that you must have equal areas. y is the paper strip depth corresponding to r radius. If you take 'a' as the radius of the curve (at its base) and 'b' its overall height, then, for any 't' value, you calculate r and y. R=a cos(t) and y=b sin(t), where 't' can be anything from 0 to 90º (first quadrant). Henni - first, you have to define the curve you want to get. Fortunately, it is not too hard to keep just the outer, printed, slice. That was not the case with the cannon on the Panzerjagerwagen. You should be able to do it without laminating the paper because the diameter is reasonable. The worst part is to get the desired shape close to the edges. I repeat the process until the diameter looks good and reasonably uniform, putting more pressure, in any pass, where the diameter remains bigger. ![]() It is important to put the pressure evenly and not too much. The method I use is to put the part over a desk (or something else) edge, press it with a finger, one hand or both, depending on the part size, and slide it around the edge. The parts you talk about have something good: the diameter is not too small. Rolling long cylinders is always complicated and GPM's thick paper certainly doesn't help I built the 'old' kit but, probably, the new one is just a Zaphod - You got to the buzzword: paper :D. John - You are in for a good one! Ulm is one of Schreiber's best kits.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |