Convair Model 61 IAE V2500 50.4 m version Powered Updated 3D Print 1:150 Scale

Convair Model 61 IAE V2500 Powered Updated 3D Print 1:150 Scale Additional Note: Only the display stand files are provided here as free downloads. The aircraft model itself is available separately through my Gumroad page https://creativedesigns840.gumroad.com/l/kppht Or you can visit my main Gumroad page on https://creativedesigns840.gumroad.com Convair Model 61 — The Twin-Jet That Could Have Challenged the DC-9 Concept Overview — A Twin-Jet Convair Successor The Model 61 was envisioned as a twin-engine turbofan airliner using the JT8D turbofan series , derived from the Convair 990’s powerplant lineage . In contrast to the four-engine Convair 880 and 990, the Model 61 sought to achieve: Lower fuel burn Reduced maintenance cost Improved dispatch reliability Competitive economics against short- to medium-haul aircraft such as the DC-9 📷 Image redacted — claim this model to add your own media The T-tail configuration , inspired directly by the DC-9 , positioned the Model 61 as Convair’s true narrow-body market response , optimized for high-cycle regional and trunk-route operations . This design direction mirrors what Douglas later achieved with the DC-9 , and McDonnell Douglas with the MD-80 series — scaling a proven airframe into a long-term product family. Airframe Geometry — Shortened Convair 880 Lineage Based on available three-view references and CAD interpretation of Fuselage shortened to ~87.5% of Convair 880 length, Approximate fuselage length: ~34.5 m, Structural weight reduction , at the cost of lower passenger capacity, T-tail layout , requiring careful center-of-gravity and pitch stability balancing Despite the shorter fuselage, the Model 61 appears longer than the Convair Model 60 , due to T-tail geometry and aft horizontal stabilizer placement , extending the effective tail moment arm. 📷 Image redacted — claim this model to add your own media Wing & Aerodynamics — Proven 880M Platform with Modifications A key design philosophy was reuse of the Convair 880M wing and wingbox , minimizing development risk while retaining Convair’s high-speed cruise aerodynamic DNA . Wing Data (Inherited & Modified) Span: 36.58 m Root-Tip Airfoil: NACA 64-0012 - NACA 64-0008 Aerodynamic Adjustments Wing sweep and wingtip geometry modified to compensate for: T-tail moment arm changes Modified CG envelope for shortened fuselage mass distribution Unlike the Convair 880M and 990A, the Model 61 relocates engines to the rear fuselage , similar to the Sud Aviation Caravelle , altering: Pitch coupling behavior Yaw inertia Structural load paths Maintenance accessibility 📷 Image redacted — claim this model to add your own media Powerplant — IAE V2500 series The baseline engine assumption is the V2525-D5 , producing approximately: 111.2 kN thrust per engine (25,000 lbf) A later conceptual upgrade suggests a V2528-D5 , estimated at: 124.55 kN thrust per engine (28,000 lbf) Performance Gains Improved takeoff performance Better hot-and-high airport capability Increased payload margin Improved thrust-to-weight ratio Estimated Thrust-to-Weight Ratio Using IAE V2500 engines: T/W ≈ 0.25-0.28 A strong value for a 1960s–1970s twin-jet , comparable to DC-9-class performance . Weight & Fuel Capacity — Downsized but Efficient Estimated Maximum Takeoff Weight (MTOW) Metric: ~60,312.61 kg Imperial: ~133,000 lb Due to fuselage shortening and reduced internal fuel volume , total fuel capacity is lower than the Convair 880 — reinforcing the Model 61’s intended role as a medium-range, high-frequency narrow-body . 📷 Image redacted — claim this model to add your own media Cabin Layout & Passenger Capacity Estimation The Model 61 retains Convair’s 5-abreast (2+3) seating layout , preserving a comfort advantage over 6-abreast competitors . Seating Assumptions Seat pitch: 33 inches Cabin layout: 2+3 Fuselage reduction: ~5 m shorter than Convair 880 Estimated Passenger Capacity ~85–110 passengers , depending on configuration Trade-offs include: Lower empty weight Faster turnaround times Improved seat-mile economics IAE V2500 Era — MD-90 / A320-Class Modernization To compete with MD-90, MD-95, A320 , and later 717 * and A220 class, Convair transitions to IAE V2500 engines . Variant Plug Extension New Length V2500 Base Derived from 44.5 m 45.9 m V2500 Stretch 1 +2.0 m +1.0 m 48.9 m V2500 Stretch 2 (Final) +1.0 m +0.5 m 50.4 m V2500 Shortened (Final) -2.0 m -1.0 m 42.9 m The 49 m variant reaches structural and efficiency limits , motivating a transition to modern high-bypass turbofans. Performance IAE V2500 Era — Transitional Upgrade Thrust class: ~111.2-124.5 kN Variant Length Estimated MTOW (kg) Estimated MTOW (lb) T/W (Ratio) V2525 Base (45.9 m) 44.5 m 86,000 kg 189,600 lb 0.26 (IAEV2525-D5) Stretch 1 (48.9 m) 47.5 m 91,000 kg 200,600 lb 0.25 (IAE V2525-D5) Final Stretch (50.4 m) 49.0 m 95,000 kg 209,400 lb 0.27 (IAE V2528-D5) Final Version (42.9) 42.9 m 81,000 kg 178,600 ln 0..28 (IAE V2525-D5) Structural Changes: Reinforced wingbox Strengthened landing gear Increased fuel capacity Higher passenger capacity (~120–155 seats) At 49 m, the IAE V2500 and Convair Model 61 platform approaches its aerodynamic and economic limits. Pack A — 3D Printing Pack (STL + 3MF) Get Convair Model 61 IAE powered 3D Printing Pack Here for $14 Includes: High-resolution STL of the aircraft Included Custom Aircraft Stands Clean watertight mesh suitable for resin or FDM printing 3MF file for layout reference Aerodynamic, smooth loft surfaces just like wind tunnel models Ready for slicing (Cura, PrusaSlicer, Bambu Studio, Orca-Slicer) Optional: scaled versions (1:150, but can be re-sized as 1:72, 1:144, 1:48, etc.) Perfect for: Collectors · Modelers · 3D printer hobbyists 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media Pack B — RC Maker Pack (DXF + 3MF) Get Convair Model 61 IAE powered RC Maker Pack Here for $19 Includes: Full DXF cross-section slices (wing + fuselage) for laser cutting Up to ~50 fuselage stations Wing rib sections Clean orthographic section cuts 3MF file for RC layout reference Perfect for: RC aircraft builders · Laser-cut foam/balsa makers · Workshops Pack C — Engineering Pack (CAD) Get Convair Model 61 IAE powered — Engineering CAD Pack Here for $24 Includes: Full STEP 214 file (solid bodies + surfaces) Full IGES file (solid bodies + surfaces) Full CATIA file (solid bodies + surfaces) Full Parasolid Binary .X_B (solid bodies + surfaces) Complete aircraft with precise NURBS lofts Suitable for: SolidWorks Fusion 360 CATIA Creo Siemens NX Engineering-grade geometry Perfect for editing, CFD pre-processing, and derivative design work 3MF file for layout reference included Perfect for: Engineers · Students · Aerospace researchers 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media Pack D — Merchandise Art Pack (DXF + DWG + PDF) Get Convair Model 61 IAE powered Merchandise Art Pack Here for $11 Includes: Clean line-art views: 3-side view (top, side, front) + Bonus 1-side view (belly) Isometric view Provided in DXF + DWG + PDF PDF in both modern black-over-white diagram as well as negative-white-over-black diagram High resolution, ready for: T-shirt designs Posters Stickers Wallpapers Classroom material Perfect for: Artists · Merch stores · Classroom projects · Aviation fans Pack E — Blender Artist Pack (OBJ + STEP + 3MF + GLB + GLTF) Get Convair Model 61 IAE powered — Blender Artist Pack Here for $13 Includes: OBJ + GLB file exported from CAD Ultra-smooth wind-tunnel-grade geometry STEP file included for those who want to re-export their own mesh Ready to import into: Blender Cinema 4D Maya ZBrush 3MF file for layout reference included Note: Untextured, raw CAD mesh. Perfect for sculpting, kitbashing, rendering, or custom livery painting. Perfect for: Blender users · Render artists · Hard-surface kitbashers 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media 📷 Image redacted — claim this model to add your own media Ultimate Pack Includes EVERYTHING in Packs A–E STL + 3MF 3D Print model DXF Cross Section Laser Cut RC STEP 214 + IGES + CGR Engineering model DXF + PDF + DWG Merch Poster OBJ + STEP + 3MF + GLB + GLTF Render Artist What You Can Do With These Packs Depending on the pack you choose, you can: 3D print the aircraft Build RC laser-cut models Perform CAD or CFD analysis Render it in Blender Create posters, stickers, and merch Study the engineering form This product line is divided into clear “factory-floor” production tiers for different users: 3D printers, CAD engineers, RC builders, artists, and hobbyists. See Also Different Aircraft of the Era Dassault Mercure Vickers VC10 VFW-614 Tu-134 Convair 880 Convair 900