Item 1730
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OTHER: Aircraft - Gyro/Heli - UniCopter-Lite - Intermeshing -  All Electric |
Overview:
For lead page see; UniCopter-Lite
Basically, a modified SynchroLite fuselage with modified Electrotor - Simplex principal assemblies.
A theoretical and preliminary design for the development of a simplistic all electric recreational hybrid helicopter/gyrocopter (UniCopter).
For alternative idea see; OTHER: Aircraft - Gyro/Heli - UniCopter-Lite - Single Rotor - All Electric.
For a potentially subsequent idea see; Electric UniCopter
Current Tasks
and Concerns:
Tasks:
Design Principal Assembly for the two intermeshing rotors.
Design the pusher propeller assembly.
Design ratio mechnism for differential roll control.
Concerns:
If either of the two planetary gearboxes brake down the craft is screwed. Must have means of interlocking the two aerodynamic rotors. This interlocking might be a pair of spur gears with a 'lump' at a specific azimuth to assure the rotors will mesh correctly.
Dislikes;
compared to 'Single Rotor' above: One more Principal Assembly, however each of the two of them will be slightly smaller than the one larger single rotor assembly
The 2-bladed teetering rotors lack the desired control authority of rigid or ARR rotors.
Objectives:
A pair of Intermeshing rotors mounted on a gimbaled principal assembly.
Principle assemblies to be Electrotor - Simplex, or possibly Electrotor - SloMo in the future.
Single pusher propeller mounted on tail-boom. It might be made rotatable about a vertical axis so as to provide yaw control as an alternative to longitudinally opposed main rotors.
Drawings:
Bill of Material 0472 ~ Not yet done for this craft.
Primary Grouping:
DESIGN, MAKE & BUY
:
Rotor Assembly: Not yet modified for this concept
Sketches of the sub-assemblies, plus a discussion on Rotary Wing Forum.
- Rotor
- Power Train + Motor
- Gimbal
- Control
- Yaw control to be by rotating propulsor, at perhaps vertical stabilizer, about the Z-axis. This will eliminate the need for opposed longitudinal control of the rotors and differential thrust of the main rotors while maintaining equal RRPM. Differential power with equal RRPM could be used if the two rotors were mechanically interconnected by large (nylon?) spur gears.
Propulsor Assembly: Not yet modified for this concept
- Propeller, motor and belt reduction.
- It is said that the Predator 30-8 will swing props up to 30" and develop up to 12.5kW of pure power. A 60" prop has an area 4 times greater and a 66" prop has an area 4.84 times greater. This should/might imply that the ratio of belt reduction should be between 4:1 and 5:1. The Predator 38 produces 1
5 KW / 12,5KW = 1.2 times the power therefore it may only require a reduction of 4/1.2 = 3.33:1 for a 60" prop and a reduction of 5/1.2 = 4.16:1 for a 66" prop.
- Check the ratios out further. However, initially design for a 4.5:1 reduction.
Peripheral Assemblies: Not yet modified for this concept
Power Storage:
Notes:
- Note that by providing mechanical power to the rotor will probably require a decrease in the longitudinal dimension between the transverse pitch pivot and the teetering pivot (center of lift).
Same Page ~ Different Craft:
~ SynchroLite ~ UniCopter ~ Nemesis
Introduction Page | SynchroLite Home Page | Electrotor Home Page | UniCopter Home Page | Nemesis Home Page | AeroVantage Home Page:
Initially displayed: July 27, 2009 ~ Latest revision: July 31, 2009