1682

Item 1682

OTHER: Aircraft - PropRotor - AeroVantage - 1x2 Overview [Scale]

1/8th Scale or 1/10th Scale of 1694.html. There is a drawing of both

There is the AXI motor Double 5330/20, for 1/4 scale, which has a hollow shaft.

	Overview	Extendable	Underslung
Full	1681.html	1694.html	1695.html
Scale 1/4, 1/8, 1/10	1682.html	1682.html

This page, drawings, BOM etc will probably be split up between 'Overview' and tha actual chosen scale method.

Drawing:

This is just a direct copy of the full size 1681 scaled by 1/10 th.

Bill of Material 1682 ~ Final Assembly - for the 1/10 scale. At this point in time it could also be for the 1/8 scale and the scale underslung arms.

Bill of Material 1754 ~ Final Assembly - This is for the 1/4 or the 1/5th scale. There is no web page yet, just the BOM.

It might be possible to replace the two 350 3S v2 batteries with the two 1345 3S v2 batteries for a weight saving of (100 - 29 ) x 2 = 142 g

Possible Formats:

Small UAV (scale model)

Usage: Outdoor Urban Missions: SWARM. Surveillance and Weapon with Advanced Remote Monitoring.

A large number of these volume-produced helicopters are flown to and parked at strategic locations.
The craft then use their surveillance equipment to oversee the surrounding territory AND oversee one or more other of these helicopters.
The helicopters do not carry weapons, they are the weapon. They are not intended to penetrate armor. This craft's parts and the onboard weapon become shrapnel.
With their electric motors and PropRotors, these small craft are intended to quietly and quickly provide surveillance and attack.
Should one of the craft be 'attacked' then the other craft can respond within seconds

Small 1-4 seat manned craft. See 1681.html

Large transport ~ to compete with the V-22 Osprey. See 1681.html

Power: Reciprocating engines or electric motors.
Power source for electric motors might be genset, batteries, etc.

Scaling - Specifications and Calculations:

UniCopter (w/ 2 rotors) Scaled to AeroVantage (w/ 2 rotors) Comparison for General Reference:

For source of the following Full-scale information see DESIGN: AeroVantage ~ PropRotor - Disk - Rotor 1x2

Note that this is for the fairly efficient rotor (low disk loading), not that of a propeller, or the actual in-between.

Full scale:

1/2 scale:

1/3 scale:

1/4 scale:

1/5 scale:

1/8 scale:

1/10 scale:

Gross Weight (lb)

1325

160

50

21; (9,525 g)

10.6; (4,808 g)

2.6 lb; (1,182 g)

1.325 (601 g)

Rotor Radius - Front (ft)

5.5

2.75

1.8

1.375

1.1

0.69 (16.5" dia.)

0.55 (33.5 cm dia.)

Rotor Radius - Rear (ft)

4.375

2.1875

1.46

1.1

0.875

0.55 (13.2" dia.)

0.44 (26.8 cm dia.)

Disk Area Rotor - Front: (ft²)

95.1

23.8

10.6

5.9

3.80

1.49

0.95

Disk Area Rotor - Rear: (ft²)

60.2

15.0

6.69

3.76

2.41

0.94

0.60

Total Disk Area - 2 rotors: (ft²)

155.3

38.8

17.29

9.66

6.21

2.43

1.55

Average Disk Loading: (lb/ft²) ⁽⁵⁾

8.53

4.12

2.89

2.17

1.71

1.07

0.85

Total Power (a): (HP) ^{(1) (2) (6)}

165

20.6

6.1

2.58

1.32

0.322

0.165

Total Power (a): (watts) ^{(2) (6)}

15,361

4,549

1,924

984

340

123

Total Power (b): (HP) ^{(1) (2) (6) (8)}

165

14.6

3.52

1.28

1.28

0.114

0.052

Total Power (b): (watts) ^{(2) (6) (8)}

10,872

2,625

954

443

85

39

Power Each motor: (HP) a ~ b

82.5

10.4 ~ 7.2

3.06 ~ 1.8

1.28 ~ 0.64

0.594 ~ 0.64

0.16 ~ 0.06

0.08 ~ 0.026

Power Each motor: (watts) a ~ b

9962 ~ 478

492 ~ 222

170 ~ 43

62 ~ 20

Tip Speed: <0.7M. See below

0.61&0.57

x

x

x

x

x

x

Rotor RRPM ⁽⁷⁾ - Front: See below

1,180

2,360

x

4,720

6,608

9,440

11,800

Rotor RRPM⁽⁸⁾ - Rear: See below

1,385

2,770

5,540

8,302

11,080

13,080

Wing Span: (ft)

25

12.5

8.33

6.25

5.0

3.125

2.5

Wing Area: (ft²)

108

27

12

6.75

4.32

1.6875

1.08

Wing Loading: (lb/ft²) ⁽³⁾

12.27

5.93

4.17

3.11

2.45

1.54

1.23

Overall Length in Hover: (ft)

27

13.5

9

6.75

5.4

3.375

2.7

Full scale:

1/2 scale:

1/3 scale:

1/4 scale:

1/5 scale:

1/8 scale:

1/10 scale:

For the source of the required total horsepower see DESIGN: AeroVantage ~ PropRotor - Disk - Rotor 1x2.

Note that this value must be divided by 2; amongst 2 proprotors.

The Midget Mustang's wing loading is 14.0 lb/ft² at 950 lb GW and 14.7 lb/ft² at 1,000 GW.

These values are for the mean radius (to be adjusted by note 4 below). The front proprotor will have a 10% larger diameter and the aft proprotor will have a 10% smaller diameter.

This may be higher than desired. Perhaps the diameter of the rotors should be increased. This is due to the fact that we are talking electric propulsion.

The power is based on the weight of the UniCopter, which has a disk loading of 3.5 to 4 lb/ft². It must be remembered that the disk loading is much higher on the AeroVantage [The average disk loading in the above table is 8.53 and the rear rotor will have a disk loading of (1,325/2)/60.2 = 11.0 lb/ft²]. Therefore the power to hover (or the terminal speed in autorotation) in the AeroVantage will be greater than the UniCopter. This means the AeroVantage's actual weight must be less and/or the disk area increased and/or larger motors be utilized.

AXI 5330 RPM/V = 235. 30V x 235 = 7,050 @ 25A for 1 motor = 1HP.

p = (l /L)^7/2 x P: p is power. l/L is the scale of the model. P is power of the full-size craft = 165hp.

Example; 100hp and 1/10 scale is P = (1/10)^7/2 x 100 = (0.1)^3.5 x 10^-2 = 3.16 * 10^-2 ≈ 0.032hp ≈ 24W.
165hp and 1/2 scale is P = (1/2)^7/2 x 165 = (0.5)^3.5 x 165 = 0.088 * 165 ≈ 14.58hp ≈ 10,872W
165hp and 1/3 scale is P = (1/3)^7/2 x 165 = (0.333)^3.5 x 165 = 0.021 * 165 ≈ 3.52hp ≈ 2,625W
165hp and 1/4 scale is P = (1/4)^7/2 x 165 = (0.25)^3.5 x 165 = 0.008 * 165 ≈ 1.28hp ≈ 954W
165hp and 1/5 scale is P = (1/5)^7/2 x 165 = (0.20)^3.5 x 165 = 0.0036 * 165 ≈ 0.594hp ≈ 443W
165hp and 1/8 scale is P = (1/8)^7/2 x 165 = (0.125)^3.5 x 165 = 0.0007 * 165 ≈ 0.114hp ≈ 85W
165hp and 1/10 scale is P = (1/10)^7/2 x 165 = (0.1)^3.5 x 165 = 0.0003 * 165 ≈ 0.052hp ≈ 39W

Considerations regarding a half-scale of only the; 2 proprotors, 2 motors, 2 variable pitch, and one for & aft tilt mechanism.

The Midget Mustang's wing loading is 14.7 lb/ft²

The power required for a 1/3-scale will be 6.1 hp. The available power for household circuit: 220 V * 15 A = 3600 W. 3600 W / 735 = 4.9 HP, This means that 2 double circuits will be required.
The present house (@ 2595) has a 200 A main. Is this at 110 V or 220 V?
The bigger the craft the greater the financial loss due to failures during testing; by up to 8 times per change of above scale.

Considerations regarding PropRotor RPM

The tip speed of the tip should be <0.7 M, which is <761 fps, which is <1,392,132 cm/min. For the 1/8-scale, the diameter of the front rotor will be .69ft R = 42 cm R for a 132 cm circumference, and the diameter of the rear rotor will be 0.55ft R = 16.8 cm for a 105 cm circumference. The speed of the front rotor will be <10,546 rpm and the rear rotor will be <13,258 rpm.

Notes:

For information see 1667.html for now until it is brought over here or referenced to 1667.

If going with 1/4-scale or 1/3-scale, see information on Joker at bottom of UniCopter ~ Intermeshing Electric UAV ~ 1/4 scale

Outside Information:

The Electric Helicopter Beginner's Guide v17 , 225 pages

Try these links if you have an interest in tailless and/or unconventional aircraft:

The Panknin Twist Formula

A Retrospective: Flying Wing Design Issues

UIUC Airfoil Coordinates Database

Model Information: 1,200 mm (47") wing span. Instructions and pictures ~ http://www.fmx.dk/projects/flying_wing/flying_wing.html

Northrop N9M R/C model

Powered Horten Ho 229 V3 model 1/8th scale. This gives a span some 208 cm (82 inch)

UAV Airframe Development Stages
Flying Wings
Flying wing CG calculator Move to wing page.

Weight & Balance:

Item:	Full Name:	Wt. Ea.	Qty.	Length of Arm (in)			Moment (lb-in)
		Wt. Ea.	Qty.	X	Y	Z	X	Y	Z
xx	Motor	xx g (xx #)	1	x	x	x	x	x	x
xx	ESC	xx g	1	x	x	x	x	x	x
xx	Batteries	xx g (xx #)	1	x	x	x	x	x	x
xx	PropRotor	x	1	x	x	x	x	x	x
xx	Reciever	x	1	x	x	x	x	x	x
xx	Servos	x	x	x	x	x	x	x	x
xx	Rotor	x	1	x	x	x	x	x	x
xx	Fuselage	x	1	x	x	x	x	x	x
xx	Tail	x	1	x	x	x	x	x	x
xx	xx	x	1	x	x	x	x	x	x
xx	xx	x	1	x	x	x	x	x	x
	Total:	x	1	x	x	x	x	x	x

Purchased Items:

Rotor Blade:

http://www.helimax-rc.com/accys/hmxe4270.html

Motor:

"Miniature linear actuators": (Google lists many)

http://www.zaber.com/products/product_group.php?group=T-LA&tab=Series%20Specs

Model of flying wing that might be the basis for the first model.

Miglet: 1,050 hits on Google for [ Miglet (ElectriFly OR "Great Planes") ]

Wingspan: 28 in [710 mm]

Wing Area: 209 sq in [13.4 dm2]

Weight: 12 – 13 oz [340 – 370 g]

Wing Loading: 8.3 – 8.9 oz/sq ft [25 – 27 g/dm2]

Length: 15 in [380 mm]

Radio: 3-channel minimum with elevon mixing, 2 micro servos,

micro receiver

Notes: The rough wingspan of the full model is 25 ft (300"). The Miglet model has a wingspan of 28". This amounts to 300/28 = 10.7 scale. The winglets will add slightly to the aerodynamic wing span therefor the 1/10 scale MAY do.

Same page in 2x4:

OTHER: Aircraft - VTOL - AeroVantage - Scale 2x4 Overview

Initially displayed: November 22, 2008 ~ Last Revised: September 3, 2009

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.

	Full scale:	1/2 scale:	1/3 scale:	1/4 scale:	1/5 scale:	1/8 scale:	1/10 scale:
Gross Weight (lb)	1325	160	50	21; (9,525 g)	10.6; (4,808 g)	2.6 lb; (1,182 g)	1.325 (601 g)
Rotor Radius - Front (ft)	5.5	2.75	1.8	1.375	1.1	0.69 (16.5" dia.)	0.55 (33.5 cm dia.)
Rotor Radius - Rear (ft)	4.375	2.1875	1.46	1.1	0.875	0.55 (13.2" dia.)	0.44 (26.8 cm dia.)
Disk Area Rotor - Front: (ft²)	95.1	23.8	10.6	5.9	3.80	1.49	0.95
Disk Area Rotor - Rear: (ft²)	60.2	15.0	6.69	3.76	2.41	0.94	0.60
Total Disk Area - 2 rotors: (ft²)	155.3	38.8	17.29	9.66	6.21	2.43	1.55
Average Disk Loading: (lb/ft²) ⁽⁵⁾	8.53	4.12	2.89	2.17	1.71	1.07	0.85
Total Power (a): (HP) ^{(1) (2) (6)}	165	20.6	6.1	2.58	1.32	0.322	0.165
Total Power (a): (watts) ^{(2) (6)}		15,361	4,549	1,924	984	340	123
Total Power (b): (HP) ^{(1) (2) (6) (8)}	165	14.6	3.52	1.28	1.28	0.114	0.052
Total Power (b): (watts) ^{(2) (6) (8)}		10,872	2,625	954	443	85	39
Power Each motor: (HP) a ~ b	82.5	10.4 ~ 7.2	3.06 ~ 1.8	1.28 ~ 0.64	0.594 ~ 0.64	0.16 ~ 0.06	0.08 ~ 0.026
Power Each motor: (watts) a ~ b				9962 ~ 478	492 ~ 222	170 ~ 43	62 ~ 20
Tip Speed: <0.7M. See below	0.61&0.57	x	x	x	x	x	x
Rotor RRPM ⁽⁷⁾ - Front: See below	1,180	2,360	x	4,720	6,608	9,440	11,800
Rotor RRPM⁽⁸⁾ - Rear: See below	1,385	2,770		5,540	8,302	11,080	13,080
Wing Span: (ft)	25	12.5	8.33	6.25	5.0	3.125	2.5
Wing Area: (ft²)	108	27	12	6.75	4.32	1.6875	1.08
Wing Loading: (lb/ft²) ⁽³⁾	12.27	5.93	4.17	3.11	2.45	1.54	1.23
Overall Length in Hover: (ft)	27	13.5	9	6.75	5.4	3.375	2.7
	Full scale:	1/2 scale:	1/3 scale:	1/4 scale:	1/5 scale:	1/8 scale:	1/10 scale: