[WES-Technik] [Bob Selman Designs] [Knight & Pridham] [VL Products]


Note: For more info on these and other motors be sure to check out Dick Miller's home page.

WES-Technik

Below is a picture of two WES-Technik motors I have along with one of their carbon props. The motors are the Micro DC 5-2.4 and the DC1717, the prop is 23x12cm (9x4.7in). The DC 5-2.4 is geared 8:1, the DC 1717, 11.8:1. The total weight of the motors and gear shafts are 14.9g (0.53oz) for the DC5-2.4 and 20.2g (0.71oz) for the DC1717 and the prop adds 3.2g (0.1oz).


WES-Technik's DC 5-2.4 and DC 1717 motors and their 23x12cm carbon prop.


CAD drawing of WES-Technik's DC 5-2.4 8.3:1.

Motor:   DC 5-2.4   DC1717
Wt g (oz)  14.9 (0.53)  20.2 (0.71)

Micro DC 5-2.4 w/ 8.3:1 gearing
Here are some of the DC5-2.4 motor characteristics courtesy of WES-Technik:

V I (A) Power(W) T g (oz) RPM
4 0.29 1.2 20 (0.71) 1665
5 0.40 2.0 30 (1.1) 1990
6 0.55 3.3 43 (1.5) 2340
7 0.70 4.9 55 (1.9) 2650
8 0.85 6.8 69 (2.4) 2900
9 1.01 9.1 82 (2.9) 3150
10 1.17 11.7 95 (3.4) 3380
V = voltage, I = current in Amps, Power in Watts,
T = thrust in grams (ounces), RPM = revolutions per minute

DC 1717 w/ 11.8:1 gearing
Here is another picture of the DC 1717 shown with a prop that used to be available from Anything R/C. The prop weighs 4g (0.14oz) so total weight of prop and DC 1717 is 24.2g (0.85oz). This was one of their prototype props. They also made a prop they called the ARC-1 which was similar to the prop shown, but has a little different characteristics.


WES-Technik's DC 1717 motor, Anything R/C's
ARC-1 and WES 23x12cm carbon prop.

Here are some of the DC 1717 motor characteristics with the 23x12cm WES prop, and the Anything R/C prototype prop and ARC-1 prop. (Note: The WES prop is not the prop WES recommends for this motor, they recommend a 26x12cm, which is why its performance looks fairly poor compared to the Anything R/C prop.)

WES Prop Anything R/C Prototype Prop Anything R/C ARC-1 Prop
V I (A) T g (oz) I (A) T g (oz) I (A) T g (oz)
3.0     0.19 16.1 (0.57) 0.14 13.3 (0.47)
4.0 0.12 22.5 (0.44) 0.33 27.7 (0.98) 0.25 23.2 (0.82)
5.0 0.18 19.1 (0.67) 0.50 41.2 (1.45) 0.40 36.2 (1.28)
6.0 0.25 27.6 (0.97) 0.72 56.4 (1.99) 0.57 50.2 (1.77)
7.0 0.34 37.7 (1.33) 0.94 71.8 (2.53) 0.76 64.4 (2.27)
8.0 0.42 48.0 (1.69) 1.18 84.3 (2.97) 0.98 79.0 (2.79)
9.0 0.53 61.8 (2.18)        
10.0 0.64 75.0 (2.65)        
11.0 0.75 90.0 (3.17)        
V = voltage, I = current in Amps, T = thrust in grams (ounces)


Bob Selman Designs

Bob Selman Designs' GJS-1A
Bob Selman Designs' GJS-1A is a Mabuchi N-20 geared 4.2:1. Kenway sells it labeled as the Kenway KR-1. The motor weighs 6.5g (0.2oz) without prop or leads. It also comes with a twin motor set up. No time to measure its characteristics yet.


A GJS-1A with a couple different props.


A couple GJS-1As and a KP-00.


Knight & Pridham

KP-00 w/ 2.67:1 gearing
The KP-00 is a motor that should work well for planes in the 30-60g (1-2oz) range. It has 2.67:1 gearing and comes with a 8.6cm (3.38in) diameter adjustable pitch prop, and also works well with a Union U-80 prop. My motor with connectors weighs 5.1g (0.18oz), the U-80 prop 0.7g (0.02oz) and the K&P adjustable prop 0.8g (0.03oz).


Knight & Pridham's KP-00 2.67:1 propulsion
system pictured with a Union U-80 prop and
the K&P adjustable pitch prop it comes with.


Here are some specs for the KP-00 courtesy of Dick Miller and from my own experimenting:

Dick Miller's characteristics My characteristics
U-80 Prop K&P Prop U-80 Prop K&P Prop
V I T g (oz) RPM I T g (oz) RPM I T g (oz) I T oz (g)
2.0 0.43 7.9 (0.28) 7000 0.64 9.9 (0.35) 5300 0.43 7.3 (0.26) 0.59 8.3 (0.29)
3.0 0.75 13.9 (0.49) 8900 1.02 15.9 (0.56) 6700 0.78 13.1 (0.46) 0.97 14.2 (0.50)
4.0 1.05 21.0 (0.74) 10700 1.33 21.0 (0.74) 8000 1.07 18.2 (0.64) 1.30 19.4 (0.68)
V = voltage, I = current in Amps, T = thrust in grams (ounces), RPM = revolutions per minute


VL Products

The motors pictured below are VL Products HY-50K with a Williams Bros 10.5cm (4.125in) prop, HY-50D with a 15.2cm (6in) Tern prop (VL's P-2) and HY-50B with a 18.4cm (7.25in) prop (VL's P-1). The Williams Bros prop weighs 1.1g (0.04oz), the P-1 prop weighs 5g (0.18oz) and the P-2 prop weighs 3g (0.11oz). All the motors have a 5:1 enclosed in-line gear box. These systems are very simple to attach to your plane, simply drill a hole in the bulkhead/former you want it attached to, stick the motor through and tighten the plastic nut. The HY-50K weighs 10g (0.35oz), the HY-50D 19g (0.67oz) and the HY-50B 21g (0.74oz), these weights include the 5:1 gear box. These motors are getting difficult to find, Cloud 9 sometimes has them (see my Links Page).


VL Products HY-50K, HY-50D and HY-50B.

Motor Wt g (oz)
HY-50K 10 (0.35)
HY-50D 19 (0.67)
HY-50B 21 (0.74)
 
Prop Wt g (oz)
Wm Bros 1.1 (0.04)
P-1 5 (0.18)
P-2 3 (0.11)

HY-50K w/ 5:1 gearing
Here are some of the HY-50K's characteristics with two different props from some of my experimenting:

Wm Bros Prop P-2 Prop
V I T g (oz) I T g (oz)
2.0 0.21 2.6 (0.09) 0.42 9.0 (0.32)
3.0 0.32 4.5 (0.16) 0.64 15.4 (0.54)
4.0 0.43 9.9 (0.35) 0.88 21.8 (0.77)
5.0     1.11 27.3 (0.96)
V = voltage, I = current in Amps, T = thrust in grams (ounces)

HY-50D w/ 5:1 gearing
Here are some of the HY-50D's characteristics courtesy of Dick Miller and from my own experimenting:

Dick Miller's characteristics My characteristics
P-1 Prop P-1 Prop P-2 Prop
V I (A) T g (oz) RPM I (A) T g (oz) I (A) T g (oz)
2.0       0.57 18 (0.62) 0.54 15 (0.51)
3.0 0.98 35 (1.23) 2600 0.91 35 (1.22) 0.87 27 (0.95)
4.0 1.30 53 (1.87) 3300 1.33 55 (1.93) 1.32 44 (1.56)
5.0 1.80 74 (2.61) 3800 1.74 75 (2.65) 1.74 60 (2.12)
6.0 2.34 98 (3.46) 4200 2.14 93 (3.27) 2.15 76 (2.68)
7.0 2.87 122 (4.3) 4600        
V = voltage, I = current in Amps, T = thrust in grams (ounces), RPM = revolutions per minute

HY-50B w/ 5:1 gearing
Here are some of the HY-50B's characteristics props courtesy of Dick Miller and from my own experimenting:

Dick Miller's characteristics My characteristics
P-1 Prop P-2 Prop P-1 Prop P-2 Prop
V I T g (oz) RPM I T g (oz) RPM I T g (oz) I T g (oz)
4.0 0.45 23 (0.81) 2100 0.40 17 (0.60) 2200 0.38 24 (0.85) 0.35 18 (0.63)
5.0 0.61 33 (1.16) 2600 0.53 26 (0.92) 2600 0.52 34 (1.20) 0.47 26 (0.92)
6.0 0.77 45 (1.59) 2900 0.66 35 (1.23) 2900 0.68 48 (1.69) 0.61 37 (1.31)
7.0 0.94 56 (1.97) 3300 0.82 46 (1.62) 3400 0.84 60 (2.12) 0.77 48 (1.69)
8.0 1.14 70 (2.47) 3600 1.00 58 (2.05) 3800 1.00 73 (2.57) 0.92 57 (2.01)
9.0 1.32 82 (2.89) 3900 1.18 67 (2.36) 4000 1.19 85 (3.00) 1.11 69 (2.43)
10.0 1.47 91 (3.21) 4100 1.34 76 (2.68) 4300 1.40 99 (3.49) 1.27 80 (2.82)
V = voltage, I = current in Amps, T = thrust in grams (ounces), RPM = revolutions per minute


[WES-Technik] [Bob Selman Designs] [Knight & Pridham] [VL Products]

© 2001-2004, Matthew J Litke
Contact: uplanes@litke.info