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:

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.)

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.

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:

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:

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

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: