Radial Engine, Turbo-Compound, 18 Cylinder, Post-World War II

myminifactory

Post-World War II, while jet aircraft appeared, engines of the type called Turbo Compound Engine that recover exhaust energy output by turbines were used in large aircraft such as DC-7, Constellation and P2V-7.This type was famous for Curtis-Wright R3350 engine, which incorporated many of the latest features of the time. This model was created as a teaching aid to explain its main features. A. Key Features Incorporated in This Model　① Planetary spur gear reduction mechanism with Ball pocket type hydraulic Torque Meter　② Cam drive gear + secondary vibration Balance weight (front and rear)　③ Steel Crankcase, clamp bolt type Crankshaft　④ Machined Cylinder Head Fins, thin sheet metal assembled Barrel Fins　⑤ Power Recovery Turbine (PRT) (3 pieces), output recovery gear system with torque converter　⑥ 2-speed planetary gear type Supercharger (reproduces 2-speed state)　⑦ Method of vaporizing the metered fuel from Carburetor by Impeller　⑧ Simplified auxiliary equipment -- Carburetor, Magneto, Distributor, Starter, Propeller　⑨ Can be driven by DC motor and finger (accurate assembly required)　⑩ Can be disassembled and assembled [Video] youtu.be/akSfn2Xe2Sc B. Assembly Manual (PDF format, total 38 pages)　The detail assembly manual including "Parts-List", "After printing treatment" and "Assembly procedure" are prepared based on "Standard Skill (Filing, Drilling, Tapping and painting)". C. Purchase Parts Information;　-Metal Bearing (Ball) - 6803ZZ(17x26x5)x1, 689ZZ(9x17x5)x3, 6901ZZ(12x24x6)x2, 　　　　　　　　　　　　　6902ZZ(15x28x7)x1, DDL-520ZZW52(2x5x2.5)x10　-Metal Bearing (Needle) - HK1216(12x16x10)x1, HK1712(17x23x12)x1　-Coil Spring (5x10x0.5 or 0.4) x4　　　　-Aluminum Pipe φ3, 4, 5, 6　-Piano Wire : φ1　　　　　　　　　　　　-Steel Ball : φ3 x16　-Screws M1.4, M2, M3 and M4 - Size can be changed by your experience. D. STL file　　STL files of this model are 129 items.　　"ws" of last 2 digits of file name means "With Support" special designed. E. Total Net Print Time: Approx. 297 HR 　- (Estimated as case of PLA, 0.4mm Nozzle, 0.2mm Layer Height, 40% infill and No raft and support)　　Note: When at actual print, each parameter may be adjusted by your experience. Before "Down-Loading", please watch photos carefully and consider deeply.I wish you success!!.[Update 2024.08.03]　　Assy-Manual-RE13-TC-R1 introduced ("R01-12" typo corrected)