Air Craft DataSheet

AIR CRAFT DIY MOTOR SET AC-DIYMOT-VL Pricing HERE

(updated Nov 13th, 2004)

Well, AIR CRAFT has done it again, leading in  "Do-it-Yourself" motors...  These new AIR CRAFT "VERSATILE, LONG" DIY Motors have tremendous potential for any application from direct-drive E3D to EDF screamers, and anything in between.  They feature precision-machined components throughout, clever design details, easy magnet placement, top-quality double ball bearings, and two different shafts to suit various gearboxes, EDF, and model types.

Here are the main items included in the set.

 The 19mm-diameter, 13mm-long stator means that the motor can handle up to 180 watts continuous input power, depending on the wiring and battery you choose. The motor diameter is less than 24mm so, when assembled with the 2mm shaft, it will fit perfectly in "Speed 300" class gearboxes, like GWS EPS-300/350, Hyperioin XG 300, or in ducted fans like the GWS EDF-55/64 and WeMoTec-Astro MicroFan.

The included 0.30mm wire can be used single strand for a nice 3-cell parkflyer, or  "double" all the way up to six strands per turn.  When using 6 strands in 6 turns, the motor Kv is about 3000, which works very well in 2-cell geared applications for GWS models, or 3-cell geared for aerobatic models up to 600 grams.

As always with DIY motors, the experimentation is part of the fun.  We don't offer any tech support for DIY motors - nor any guarantee of your success - but there's never been an easier-built DIY than this one, we think.  Check this thread at E-Zone for tips on winding the motors, and this thread for general conversation about the motor.

Because Air Craft is preparing to move to a new building in November, and we're also working on 40+ new products, we simply haven't had time to test these motors in many configurations. We considered holding release until 2005, but thought many would prefer having the motor sooner and winding it as they like. The motor is standard in design, and relatively large, as DIY motors go.  Therefore it is capable of a huge range of applications, from direct drive at 5000 rpm with a big prop, to ducted fans.  It all depends on the wire size - or number of strands - the winding pattern, and the number of turns you can manage to get on the stator.  If you have reservations about your ability to determine the "best" wind for your application, wait a few weeks until user results are in before you start winding.

Dimensions:
Motor Outside Diameter:  23.45mm
Length excluding shaft:   25.3mm
Output Shaft Length:   ~10mm
Weight fully assembled:   39.8g

Here are the parts included:

*Custom Steel/Aluminum Bell assembly with "fingers" for perfect positioning of the 8 magnet poles
*6-pole stator measuring 19mm OD by 13mm long
*8 pcs 13x6x1mm Neodymium N48 120C Magnets
*0.30 mm wire (enough for two winding sessions)
*Shrink tube for the motor wires
*3mm hard, polished shaft with clip position for front mounting
*3mm shaft with 2mm output section to fit "Speed 300" gearboxes and EDF
*(2) ball bearings
* Shaft "C" clip

Here are some of the special features of the motor:

	The bearing carrier has a flat on one side, and the stator a matching flat. The fit of the two is precise. Install the stator, and twist a section of wire around the groove at top.  Perfect retention, no glue required, easily removable stator for re-winding!
	The aluminum centerpiece for the bell has fingers which fit the magnets tightly.  This insures both perfect spacing, and easy installation. Note: Inside the Black Bell you can see a ringed or ridged section.  This side fits centerpiece.
	NOTE: The 3mm shaft (pic bottom) currently comes with only one clip land. The one nearest the end of the shaft, which was intended for back-mount installations, was abandoned due to concerns that a clip alone was inadequate to retain the shaft when back-mounted, due to the high power potential of the motor. See this section below for backmounting shaft option.
	Like the stator, the motor shafts are very precisely centered, yet removeable in just a few seconds. (replacement shafts available)
	Option #1 for the 3mm shaft.   note: ring land on shaft end not present in production versions
	Option #2:  When you need a 2mm shaft, you've got it!

Here's a diagram showing the options for terminating windings.
We'll post the results of different configurations as we get input from users.

Here are the links to the discussions on the RC-Groups forum about these motors:
General Discussion
Test data
Here is a table with the results that we compiled out of the Test data thread: