ATMACA

15 measured · 0 reading · 2 chosen

Nose sectionmeasured

Nose cap. The body reaches full diameter 74 px aft of the tip, 6% of the body length. A blunt radome rather than a sharp ogive.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

End of full-diameter sectionmeasured

The body holds full diameter all the way to the aft face; the drawing shows no taper. The short piece behind the tail belongs to the interface, not the body.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Boattailmeasured

No boattail: the upper and lower body edges stay parallel to the aft face.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Fin countmeasured

Four fins at the tail.

sourceseen: 2026-09-11

projection check: A count does not depend on projection: four surfaces are four in any view. The number was taken from the manufacturer’s 3D illustration in the same catalogue; the top-view drawing shows the outline of the lateral pair.

Fin root chordmeasured

The root chord measures 113 px at the body axis. The 73 px visible in the drawing is the chord at the body surface; the model roots the panel on the axis, so both edges were extrapolated linearly inward. The previous chosen value was 14%, the measured one is 9.2%.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Fin tapermeasured

The tip chord measures 36 px, roughly a third of the root chord at the axis.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Fin spanmeasured

The fin tip sits 1.98 radii from the body axis. The top view shows the lateral pair at full span; the roll angle of the set cannot be read from the drawing, so the four surfaces are taken as symmetric.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Fin trailing-edge rakemeasured

The trailing edge holds the same station across the whole span: x = 569 px from root to tip, within one pixel. So it is perpendicular to the body axis. The leading edge moves from 642 to 605, and the sweep follows from the three ratios.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Fin trailing-edge positionmeasured

The fin trailing edge does not sit at the very tail but 2% forward of it.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Wing countmeasured

Four wings at mid-body. These are the system’s dominant surfaces and were not drawn at all in the previous version.

sourceseen: 2026-09-11

projection check: A count does not depend on projection: four surfaces are four in any view. The number was taken from the manufacturer’s 3D illustration in the same catalogue; the top-view drawing shows the outline of the lateral pair.

Wing root chordmeasured

The root chord measures 328 px at the body axis. What the drawing shows at the body surface is 229 px; both edges were extrapolated linearly inward. Roughly three times the fin chord.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Wing tapermeasured

The tip chord measures 65 px, a fifth of the root chord at the axis. The wing tapers sharply from root to tip.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Wing spanmeasured

The wing tip sits 2.74 radii from the body axis, clearly outboard of the fin tip. The top view shows the lateral pair at full span.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Wing trailing-edge rakemeasured

Unlike the fin, the trailing edge is not perpendicular: it moves toward the nose at the tip. It sits at x = 951 px at the root and 1100 px at the tip, 149 px forward across a span of 143.85 px. The leading edge moves the other way, from 1279 to 1165.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Wing trailing-edge positionmeasured

At the axis the wing trailing edge sits at 66.9% of body length from the nose; the wing occupies the middle section.

sourceseen: 2026-09-11

projection check: The drawing was directly checked for orthographic projection: body width holds at 105.2 px ± 1.4 px (1.4%) along its length, the body axis does not drift, and the upper and lower surfaces mirror within one pixel. A perspective view would taper toward the far end and the axis would wander.

Fin thicknesschosen

Thickness as a fraction of LOCAL chord. It cannot be read from a top view, where the surface lies in its own plane. A thin plate was chosen to keep the schematic language.

Wing thicknesschosen

Thickness as a fraction of LOCAL chord. It cannot be read from a top view. Chosen thinner than the fin; a thin plate is reasonable for a folding surface.