1031

Item 1031

OTHER: Helicopter - Inside - Principal Assembly - ELECTROTOR-SloMo

Objective:

To develop and build the rotor and motor for the lightest, simplest, easiest to fly and reliable, manned electric helicopter possible.

It is to incorporate; short span blades, collective by rotor rpm w/ torque-pitch assist, and cyclic control by weight shifting. It must be the easiest helicopter to fly and eventually the most economical helicopter that can be built.

For installation in twin-rotor bilateral helicopter configurations, such as; Intermeshing, Interleaving, and Side-by-side; plus perhaps Coaxial and Tandem.

The current intention is to develop the principal assembly for a Backpack helicopter. Then eventually after motor and rotor refinements put it on the SynchroLite's Fuselage. (for a weight increase of +/- 35 lbs)

For now see this thread on the Rotary Wing Forum for additional information.

Drawing or Sketch:

Radial Flux Motor:

_________________

Axial Flux Motor:
This drawing is old. The axial flux motor may not be used.

Bill of Material 1031 ~ Principal Assembly ~ only rough draft so far.

~~~~ Information Relevant to a Complete Helicopter: ~~~~

Preliminary Specifications:

The complete craft must be portable since it is a lightweight recreational helicopter and it is not intended for fast flight.

Helicopter - Disk and Power Specifications - Page1
Helicopter - Disk and Power Specifications - Page2

Future Refinements for Consideration:

Faster response to thrust demands by pilot: An idea for giving variable pitch change based upon the power to the rotor. Electrotor-SloMo - Rotorhub - Torque-Pitch

Reduced power requirement and slower rate of autorotation: An idea for increasing the disk area without increasing the weight-shifting control forces on the pilot. OTHER ~ Flight Dynamics - Rotor Hub - Aerodynamically Active Blade Twist (AABT). This may not work ~ see concerns on the page.

More Notes:

Autorotation: The only purpose of autorotation is that of allowing the craft to safely descend until a conventional powered vertical landing can be made by the pilot using reserve power.

Portability:

The complete craft must be portable since it is a lightweight recreational helicopter and it is not intended for fast flight.

Consider having the Principal Assemblies removable or having the blades fold. Removable principal assemblies will result in component weights that can be handled by one person.

Consider having all 3 blades fold upward.

Configurations:

Interleaving, Intermeshing, Side-by-side, and perhaps Coaxial or Tandem configurations. Each one will have its own advantages and idiosyncrasies. A primary consideration may be Figure of Merit due to today's limited electrical storage capability.

Fuselage:

See; Electrotor-SloMo - Fuselage

Unmanned Arial Vehicle (UAV):

Unmanned Arial Vehicle (UAV). The induced velocity distribution throughout the total disk area should be quite good, particularly during forward flight. This is because the UAV would have a very small and aerodynamic central fuselage. Alternatively, there could be a pod below both rotor hubs. In these two pods would be located the batteries and payloads. There is no need for active blade twist. The ABC and ARR should improve the induced velocity distribution.

Initially displayed: July 23, 2006 ~ Last Revised: August 14, 2010

The above utility invention is openly and publicly disclosed on the Internet to negate an entity from patenting it, to the exclusion of all others whom may wish to use it. ~ Reference patent law 35 U.S.C. 102 A person shall be entitled to a patent unless - (a) the invention was known ... by others in this country, ..., before the invention thereof by the applicant for patent.