Research Dossier (reference facts + shapes)

1922–1923 Aurel Perșu “Streamliner” (teardrop prototype) — Quick Dossier
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Identity:
- Designer: Aurel Perșu (Romanian engineer; aerodynamicist)
- Prototype built: Berlin, 1922–1923
- Core innovation: wheels placed inside the aerodynamic body line (teardrop/raindrop silhouette)
- Surviving example: donated in 1961 to Dimitrie Leonida Technical Museum (Bucharest), displayed there

Aero / engineering points to capture in the LEGO clone:
- Overall planform is a falling-water-drop: round nose, swelling cabin, long taper to tail.
- Narrow rear track (wheels tucked inward) + wide body shoulders around the cabin.
- High glasshouse with upright-ish windshield, then smooth taper to the rear.
- Front: simple “mask” panel with two round headlamps; very little grille.
- Side: small louver/vent cluster behind the front door area.
- Rear: one round tail lamp (or simple rear lamp) + small bumper line; tapered tail.

Commonly reported specs (sources vary):
- Engine: period 4-cyl; often referenced as AGA 1.4-liter used for the project
- Top speed: often cited ~80 km/h (≈50 mph) or about 60 mph depending on source
- Drag coefficient often cited very low (around 0.28; some claims lower)

Approximate dimensions (for proportional scaling):
- Overall length reported around ~4.6 m; wheelbase reported over ~3 m (varies by source)

Primary sources used for this dossier:
- Hagerty: “Aurel Persu’s 1922 Streamliner…” (history + performance claims)
- The Drive: overview + museum location
- Wikipedia (Aurel Persu): patents + museum donation note
- CEAutoClassic: dimensional notes (length / wheelbase)
- Kabinet Kuriozit: museum display photos

Image references to study (search terms):
- “Aurel Persu streamliner side profile”
- “Persu streamliner museum Bucharest”
- “Persu streamliner front view”
- “Persu streamliner rear view”