1718

Item 1718

DESIGN: AeroVantage - Transition Mechanism - Proposed Methods - 2x4 - Underslung Arms and Pivots

to Scale

See: QuadRotorAsWell.dc

Objective:

To incorporate the 1x2 mechanism (1695.html) into the 2x4

Drawing:

There are also drawings 1718_Micro_Cruise.dc and 1718_Micro_Hover.dc

Sizing:

		1x2			2x4
		Information from; 1695.dc & 1610.html			Information from; 1471.dc & 1710.html
	Fore PropRotor:		Aft PropRotor:	Fore PropRotor:		Aft PropRotor:
Radius:	66.0", 5.5 ft.		52.5", 4.375 ft.	50.0", 4.165 ft.		39.5", 3.29 ft.
Diameter:	132.0"		105.0"	100.0"		79.0"
Disk area - Each:	95.0 ft², 95.0 ft²		60.2 ft², 60.2 ft²	54.5 ft²		34.0 ft²
Disk area - Total:			155.2 ft²			177.0 ft²
Disk loading:	7.0 lb/ ft²		7.0 lb/ ft²	7.4865 lb/ ft²		7.4695 lb/ ft²
Weight - per PropRotor:	665 lb		421 lb	406 lb		254 lb
Gross weight:			1086 lb			1320 lb

Scaling:

Maintain the current diameters (100" & 79") and GW (1320 lb) of the 2x4.

Length [linear]; 100 / 132 = 0.7575, 79 / 105 = 0.7523

For multiplier use 0.75

Motor:

Could consider 2 Joby JM2 at each proprotor; if it can have a hollow center for collective control (and for sprag ?). This will provide dual circuits.

Notes:

Operate the pitch (collective) change mechanism on the 4 proprotors by a cam follower on the 90º rotation of the motor-rotorheads. This will automatically increase the pitch for cruise.

On this 2x4 it may be beneficial to also have a Torque-Pitch so that corrections to unwanted roll and pitch of the craft can be arrested.

See DESIGN: AeroVantage - Transition Mechanism - Proposed Method - 1x2 - Extendable Tubes for mobile of transition mechanism.

Consider one motor in the fuselage that operates the transition mechanisms of all four proprotors in unison.

Last Revised: Thursday, May 6, 2012