S_Hub_ARR_2blade

SynchroLite ~ Rotor - Hub - 2-blade - Absolutely Rigid Rotor

Objective:

To provide a rotorcraft with rotors that only have only 2-blades each, yet has strong controllability.

Features:

The 2-blade rotors have the aerodynamic efficient of fewer blades per rotor.

Reduced V-angle as compared to 2-blade teetering and CVJw/HS due to the high rigidity of the rotors.

Closer coupling between rotor and fuselage than 2-blade teetering and CVJw/HS.

Is a building block to the UniCopter.

Required Attributes:

Individual blade control w/ control higher than 1P.

'Absolutely' Rigid Rotor

Extreme amount of computer programming. Perhaps toooo much.

Eventually, Independent Root and Tip Control

Temporary Working Notes:

In Access:

Work out Hover - then

Work out Forward Flight - then ~ at what forward velocity?

Work out Pitch and Roll ~ at what forward velocity?

and ~~~Thrusts are going to vary with air speed.

Work out Thrust - then ~ at what forward velocity?

Work out Angle of Attack - then ~ at what forward velocity?

Work out Pitch - then ~ at what forward velocity?

Table to be Produced by Access: Start with a copy of the existing program and modify and enlarge it.

Azimuth of Port Rotor:

Thrust at 75% R

alpha (α) at 75% R

theta (θ) at 75% R

Port 1

Port 2

Star 1

Star 2

Port 1

Port 2

Star 1

Star 2

Port 1

Port 2

Star 1

Star 2

0º

15º

30º

30º

45º

75º

90º

Questions:

Will induced drag be proportional to thrust.

Will the profile drag be laterally symmetrical during forward flight?

The rotors will probably have to be computer controlled.

Look for any existing Patents.

Is this to be a SynchroLite or a UniCopter? Probably the SynchroLite because with 2-blade rotors and low disk loading it is not meant to be fast.

References:

Patents:

The programming of the computer will be extremely complex.

This Site:

Hub - 3-blade ARR w/ Rieseler Control:

Working Papers:

DESIGN:

B520

MAKE:

Bxxx

Items:

DESIGN:

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	Rotor - Hub - 2-blade - ARR - Overview & Layout	1603

MAKE:

		Name		Item

BUY:

	Name	Item

Re: TOOLS:

	Name	Item

OTHER:

	Name	Item

Same Page ~ Different Craft: ~ Dragonfly ~ SynchroLite w/ CVJ+HS ~ UniCopter

Initially displayed: December 12, 2007~ Last Revised: December 12, 2007

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.