A site devoted to
Indoor Electric Freeflight and Micro Radio Control
Model Flying

Contents

Indoor R/C Products Available From Our Online Catalogue
What Works - by Dick Miller, Flying Models Magazine (not available yet)
The VL HY50-K Drive System
The VL HY-50B Drive System by Don Srull, from the Cloud-9 RC Newsletter
The VL HY50-D Drive System - By Dick Miller
Micro, Mini and 020 Motor Characterizations Chart - by Dick Miller, Flying Models Magazine
The WES-Technik DC5-2.4 Drive System - by Dick Miller, Flying Models Magazine
The 40g Ikarus Motor in the Bleriot II - by Dick Miller, Flying Models magazine
Comparisons of Various Geared Motors - by Dick Miller, Flying Models magazine
Balsa Wood Facts and Weights
Weights of Various Covering Materials
Some Interesting Radio Control History
Flying Models Back Issue Order Desk

The VL HY-50B Drive System by Don Srull, from the Cloud-9 RC Newsletter
by the premiere micro-RC modeler, Don Srull - courtesy of John Worth at Cloud-9 RC Newsletter, Dec.'97

 VL HY-50B Planetary Geared Drive System

21.6 g bare, 23.4 g with Peck prop

 Prop  No. of Cells Volts Amps
 6" Peck 3

4

5

6

7

3.76

4.92

6.10

7.20

9.30

0.29

0.40

0.60

0.80

1.10

 7" Peck 3

4

5

6

3.71

4.83

6.10

7.10

0.42

0.55

1.00

1.30

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The VL HY50-K Drive System, 8.9 g motor
VL Products HY50-K Motor (8.9 g) with two different props
 
6" Peck Propeller (1.8 g)
6" Tern Propeller (3.1 g)
V
Amps
Watts
Thrust
T/W
RPM
Amps
Watts
Thrust
T/W
RPM
2.0
0.45
0.90
9 g
10.0
1600
0.48
0.96
11 g
11.5
1600
3.0
0.73
2.19
15 g
6.8
2000
0.74
2.22
18 g
8.1
2000
4.0
1.01
4.04
18 g
4.5
2400
1.03
4.12
24 g
5.8
2400
Included with purchase is a nice selection of wardware: 2-6" Peck props, mounting nuts, spacer and prop screws. User Note: Mounting washer required if firewall <1/16" thick

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The VL HY50-D Drive System - By Dick Miller

VL Products HY50-D Motor (19 g) with 7.25" prop
 
P-1 Prop, 4 g. 7.25" x 4.5"
V
Amps
Thrust
RPM
3.0
0.98
35 g
2600
4.0
1.30
53 g
3300
5.0
1.80
74 g
3800
6.0
2.34
98 g
4200
7.0
2.87
122 g
4600
8.0
3.57
147 g
4900
This 5:1 geared motor from VL Products weighs in at 19g excluding prop. VL recommends three different props for the motor, data is provided only for the P-1, as it provided the best static thrust figures. The three props are the P-1, a 4g, 7.25" x 4.5" black prop; the P-2, a 3 g 6" black prop formerly called the Tern Prop; and the P-3, a 3g 6.875" red plastic prop.

Do not exceed 7 Volts operating voltage for extended periods of time, as this little motor may be running at over 25 Watts and may start to smell peculiar as it proceeds to disintegrate.

Radial mounting is easily accomplished and identical to that for the HY50-K and HY50-B.

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The 40g Ikarus Motor in the Bleriot II - by Dick Miller, Flying Models magazine
Courtesy of Flying Models Magazine, March 1998 - Electric Flight Column

Bleriot II Ikarus Motor Characterization

7-1/4 x 4-1/2 Prop; Total weight = 40 g; Instructions recommended 6-7 cells

 Volts Amps Thrust T/W RPM
3.0 0.67 29 g 14.43 2400
4.0 1.04 49 g 11.78 3000
5.0 1.34 69 g 10.30 3600
6.0 1.78 91 8.52 4000
7.0 2.20 113 7.34 4400
8.00 2.56 1.34 6.54 4900

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Comparisons of Various Geared Motors - by Dick Miller
Courtesy of Flying Models Magazine, January 1998 - Electric Flight Column

Thrust/Weight & Thrust/Watt

Comparison of Various Geared Motors

(Weights and Thrust in Grams)

 Motor
Weight
Prop
Volts
Amps
Thrust
Watts
T/WT
T/Watt
WES T. DC5-2.4 12.9 9"x4.7 5.0 0.5 46 2.5 3.6 18.4
 HiLine Mini 6 19.0 6" 4.0 3.0 50 12.0 2.6 4.2
 VL HY-70 19.0 6" 4.0 3.6 48 14.4 2.5 3.3
 EMPS MG1 46.5 7.25"x4.5 5.0 3.7 139 18.5 3.0 7.5
 Cox FB05 51.9 6" 5.0 5.0 97 25.0 1.9 3.9

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The WES-Technik DC5-2.4 propulsion system - by Dick Miller
Courtesy of Flying Models Magazine, January 1998 - Electric Flight Column

WES Technik Micro DC5-2.4

Coreless Motor Characteristics

7.5:1 gearing; 9"x 4.7 Carbon Fiber Prop; 12.9 g Total Unit Weight

 Volts Amps Watts RPM Thrust
4.0 0.37 1.5 1820 33
5.0 0.51 2.6 2145 46
6.0 0.66 4.0 2500 63
7.0 0.84 5.9 2790 79
8.0 1.02 8.2 3070 89
9.0 1.21 10.9 3330 104

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Back Issues of Flying Models

You may wish to order the back issues that contain the technical data you are looking at. In this way you will be able to have all of the contextual material that came with the charts and graphs.

To order plans or back issues of Flying Models Magazine, write to:

Flying Models
P.O. Box 700
Newton , NJ 07860-0700
 
or call 1-800-474-6995 and have your Credit Card ready.

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