~~NOTOC~~ ====== Fw 200 C-3 Construction Record — Original 04 ====== ===== Spinners and Propellers ===== ===== Note ===== This page preserves Kazu Fukuda’s original forum-based construction record as closely as possible to its original source structure. It covers the construction record of the spinners and propellers. The text of each entry is shown in a highlighted box in order to make clear that it is based on Fukuda’s original post text. For a chronological reconstruction of the whole record, see: * [[en:records:fw200c3:chronology|Fw 200 C-3 Construction Record — Chronology]] ===== Source Information ===== * Original format: forum post archive * Period covered on this page: May 20, May 21, and an undated finishing record * Main contents: spinner material blocks, shaft-hole drilling, propeller blades, rotating shaft, painting and assembly * Original post text: Kazu Fukuda * Page organization: Japanese Solid Model Archive ===== Original Record Navigation ===== [[en:records:fw200c3:start|Fw 200 C-3 Construction Record]] ｜ [[en:records:fw200c3:chronology|Chronology]] ｜ [[en:records:fw200c3:original_01|Original 01]] ｜ [[en:records:fw200c3:original_02|Original 02]] ｜ [[en:records:fw200c3:original_03|Original 03]] ｜ **Original 04** ｜ [[en:records:fw200c3:original_05|Original 05]] ｜ [[en:records:fw200c3:original_06|Original 06]] ｜ [[en:records:fw200c3:original_07|Original 07]] Previous: [[en:records:fw200c3:original_03|Original 03 — Nacelles, cowlings, and attachment to the wing]] ｜ Next: [[en:records:fw200c3:original_05|Original 05 — Engines, bombs, and accessory parts]] ---- ===== Position of This Page ===== This page deals with the construction of the spinners and propellers of the Fw 200 C-3. Although the propellers and spinners are small parts, they are important elements that strongly affect the impression of the Fw 200 C-3 as a four-engined aircraft. What deserves attention here is that the work is not limited to shaping the outer appearance. The center axis of the spinner, the rotating structure, the pitch of the propeller blades, and the way the blades are attached to the spinner are all considered. Some of these processes are not very visible after completion. However, they support the persuasiveness of the engine area. ---- ===== [May 20] ===== ==== Processing Material Blocks for the Spinners and Propellers ==== {{:ja:records:fw200c3:spinner_material_blocks.jpg?nolink&700|Processing material blocks for the spinners and propellers}} **Original post text by Kazu Fukuda / English translation** This week I began making the propellers and spinners. At the far left is a material block for two spinners. I made the cross section as accurately square as possible, scribed centerlines along the axial direction on all four faces, and scribed the spinner diameter circle and a circle 1 mm smaller than that on both end faces. I drilled the shaft hole alternately from both ends using a pin vise. At this time, I carefully watched the drill so that it would remain parallel to the centerlines scribed on the four faces. If the holes meet properly at the center, the axis has been established. A brass wire for the shaft has been temporarily inserted. In the center is the square block after the shaft hole had been drilled and the block had been shaped into a cylinder. It will later be cut in half at the center and shaped into a bullet-like form. At the far right is the material block for the propellers. It has first been shaped to the front-view outline of the propeller. Each blade will then be cut apart and shaped with pitch twist. One blade that has already been shaped with pitch can be seen beside it. **Editorial Note** This record shows the first stage of making the spinners: scribing centerlines on the material block and drilling the shaft hole. What is important here is that the spinner is not treated merely as a bullet-shaped part. It is treated as a part that must have a rotating axis. Accurately establishing the axis is essential for later attachment of the propeller and for the rotating condition of the part. For that reason, the scribing and drilling at this stage contain an important construction judgment. ---- ===== [May 20] ===== ==== Shaping the Spinner into a Bullet-Like Form ==== {{:ja:records:fw200c3:spinner_shaping.jpg?nolink&700|Shaping the spinner into a bullet-like form}} **Original post text by Kazu Fukuda / English translation** At the far left is the cylindrical block after it has been divided into two. To its right is the cylindrical block with the handle of an old brush attached to the end face using instant adhesive. The divided surface is not an accurate circle, so that side will become the pointed end of the bullet shape. To its right is the piece in the middle of being shaped. After rough shaping it carefully with a small knife, in the same manner as sharpening a pencil, I held the handle with my left hand and rotated it while shaping it into a bullet-like form with a file. At the far right is the completed bullet-shaped spinner. **Editorial Note** Here, the cylindrical block is divided into two, and the handle of an old brush is used as a temporary handle while shaping the spinner into a bullet-like form. By using the brush handle, a small part can be rotated and filed without directly gripping it. This is a practical method for maintaining symmetry during handwork. It is also worth noting that Fukuda judged which side should become the tip by observing the condition of the divided surface. This reveals a fine level of observation within the making process. ---- ===== [May 20] ===== ==== Spinner with Rotating Shaft ==== {{:ja:records:fw200c3:spinner_rotation_axis.jpg?nolink&700|Spinner with rotating shaft}} **Original post text by Kazu Fukuda / English translation** A rotating shaft is attached to the spinner. On the right, from the front, is a 1.0 mm diameter brass wire for the rotating shaft. At its tip, an extremely fine 0.1 mm nichrome wire has been wound in a coil shape and soldered to form a retainer so that the shaft will not come out. To its left is a brass pipe with an inner diameter of 1.1 mm and an outer diameter of 1.3 mm; the rotating shaft is inserted into this pipe. To its left is a brass pipe with an inner diameter of 1.4 mm, which serves as a sleeve. Behind them is the shaped spinner. On the left is the spinner with the 1.0 mm rotating shaft inserted into the 1.1 mm inner-diameter pipe and attached to the spinner. If the pipe is held, the spinner rotates lightly. With this, the spinner with a rotating shaft is complete. The 1.4 mm inner-diameter pipe on the left will be attached to the engine cowling. The spinner with its shaft will be inserted into it at the final stage of assembly. **Editorial Note** In this entry, an actual rotating shaft is incorporated into the spinner. By combining 1.0 mm brass wire, a brass pipe with an inner diameter of 1.1 mm, and another brass pipe with an inner diameter of 1.4 mm, Fukuda created a structure consisting of shaft, bearing, and sleeve. This process is not very conspicuous after completion. However, it is an important construction judgment because the propeller is treated not merely as a fixed decorative part, but as a structure capable of rotation. ---- ===== [May 21] ===== ==== Trial Assembly of the Propeller Blades ==== {{:ja:records:fw200c3:propeller_spinner_trial.jpg?nolink&700|Trial assembly of the propeller blades}} **Original post text by Kazu Fukuda / English translation** On the left are the propeller blades after pitch shaping, with rings cut from aluminum pipe fitted around the blade roots, and the spinner with holes drilled for blade attachment. On the right is the state in which the blades have been temporarily attached to the spinner. **Editorial Note** Here, the propeller blades after pitch shaping are temporarily attached to the spinner. A propeller blade is not only a front-view outline. It is a three-dimensional part with twist. For that reason, trial assembly is important in order to check both the blade shape and the angle at which it attaches to the spinner. Through trial assembly, it becomes possible to confirm whether the four propeller units will present a consistent impression. ---- ===== [Date Unconfirmed] ===== ==== Painting and Assembly of the Propellers and Spinners ==== {{:ja:records:fw200c3:propeller_spinner_completed.jpg?nolink&700|Painting and assembly of the propellers and spinners}} **Original post text by Kazu Fukuda / English translation** I painted and assembled the propellers and spinners. **Editorial Note** The date of this entry has not been confirmed, but in terms of the process it belongs after the shaping and trial assembly of the propellers and spinners. At this stage, the rotating shaft, spinner, and propeller blades become a single group of parts. In the later final assembly, these parts will be attached to the engine cowlings and will help determine the expression of the Fw 200 C-3 as a four-engined aircraft. ---- ===== Summary of This Page ===== This page has covered the construction process of the spinners and propellers. **Main Focus of This Stage** * Scribing centerlines on the material blocks for the spinners * Drilling the shaft hole from both ends and establishing the axis * Shaping the cylindrical block into a bullet-shaped spinner * Making a rotating shaft using brass wire and brass pipes * Shaping the front-view outline and pitch of the propeller blades * Temporarily assembling the blades to the spinner for checking * Painting and assembling the propellers and spinners What is important here is that the propellers and spinners are made not merely as exterior parts, but as parts with a center, axis, rotation, and pitch. In particular, the drilling of the spinner shaft hole and the rotating structure are not very visible after completion. However, they support the precision and persuasiveness of the part. This record shows that Fukuda’s construction paid attention not only to visible form, but also to less visible structure and work sequence. ---- ===== Toward the Next Stage ===== The next record moves to the construction of accessory parts that help establish the Fw 200 C-3 as a large patrol bomber: engines, bombs, and landing gear-related parts. [[en:records:fw200c3:original_05|Next: Original 05 — Engines, bombs, and accessory parts]] ===== Archival Note ===== This page preserves the construction process of small parts: the spinners and propellers. It contains many judgments that become difficult to see after completion, including scribing to establish the center axis, drilling the shaft hole, creating a rotating structure, and shaping pitch into the propeller blades. For analytical organization, see: * [[en:records:fw200c3:chronology|Fw 200 C-3 Construction Record — Chronology]] ===== Navigation ===== [[en:records:fw200c3:start|← Fw 200 C-3 Construction Record]] ｜ [[en:records:fw200c3:chronology|Chronology]] ｜ [[en:records:fw200c3:original_03|← Original 03]] ｜ **Original 04** ｜ [[en:records:fw200c3:original_05|Original 05 →]] Original Record Pages: [[en:records:fw200c3:original_01|01]] ｜ [[en:records:fw200c3:original_02|02]] ｜ [[en:records:fw200c3:original_03|03]] ｜ **04** ｜ [[en:records:fw200c3:original_05|05]] ｜ [[en:records:fw200c3:original_06|06]] ｜ [[en:records:fw200c3:original_07|07]]