Propfan, Planetary Gear type, Pitch Changeable, Full Exhaust Duct Version
$20.00 Propfan, Planetary Gear type, Pitch Changeable, Full Exhaust Duct Version
3D
Published 2021-12-01T10:57:59+00:00
As an "Advanced Turboprop Engine", several engines such as "Propfan", "Open Rotor" and "Ultra Bypass" have been researched and developed in order to obtain high-speed flight while maintaining the same level of fuel consumption as the turboprop engine.
It can be classified into "Aerodynamic (turbine) type" and "Mechanical (Planetary Gear) type".
I made representative models (below) before, but I couldn't incorporate the pitch change mechanism in any of them.
・ Propfan Engine, Unducted type (TPE-04)
・ Propfan Engine, Planetary Gear type (TPE-05)
This time, I tried the "Planetary Gear type" counter-rotating, individual rotation speed, and individual variable pitch type structure. And with "Full Exhaust Duct Type". This was the big challenge for me.
A. Features of this model
① Three axes of the Planetary Gear assigned Input and Counter-Rotating Output
② "Rack & Pinion type" is adopted for pitch change mechanism (6 blades/stage)
③ Use 2-axis rods for each pitch change operation (alternative to hydraulic system)
④ Simple Brake Device is added for individual rotation speed adjustment
⑤ The engine exhaust adopts the type that is discharged through full duct around "Propfan" section
⑥ Engine and power turbine omitted
⑦ Uses metal Ball Bearing and can be driven by the dry battery motor
⑧ Disassembly and Assembly is possible (however, please do so at your own risk)
[Video] https://youtu.be/03xpcVKhKY4
B. Assembly Manual (PDF format, total 35 pages)
The detail assembly manual including "Parts-List", "After printing treatment" and "Assembly procedure" are prepared based on "Standard Skill (Filing, Drilling, Tapping, gluing and tightening)".
C. Download files includes;
- files: STL Files (64 items)
STL file name: "ws" of last 2 digits means "With Support" which special designed.
D. Purchase Parts Information; (See Assembly Manual)
1. Ball Bearing 6800ZZ (10x19x5) x5, 6805ZZ (25x37x7) x3, SMR63ZZ (3x6x2.5) x4, DDL-1050ZZ (5x10x4)
2. AL Pipe; φ5, 6, 7 and 19 Bronze Rod; φ3
3. Drill and Tap
My design hole diameter is considerably smaller than the finish hole diameter in order to ensure the wall thickness at the time of printing.
Drill : φ1, 1.5, 2, 2.5, 5.2, 6.2 Tap : M1.4, M2, M3
For M1.4 Screw; No need “Tapping” for PLA material. (φ1.0 drill required). But “Mandatory” for AL Pipe.
Please select the appropriate drill and tap size depending on the "screw" used.
4. Spring; φ5x10x0.4
E.Total Net Print Time: Approx. 117HR
- (Estimated as case of PLA, 0.4mm Nozzle, 0.2mm Layer Height, 40% infill and No raft and support)
F. 3D printing settings (Raft, Support, Layer Height, Infill)
When at actual print, each parameter may be adjusted by your experience.
But for parts having gear teeth, 100% infill is recommended.
I do hope you enjoy making!!
See above.
| Date published | 01/12/2021 |
| Price | $20.00 |