Assemble the Capacitor-Power Module
The assembly details given within this manual apply to the 10F size Capacitor-Power partskit SAP-CP/PK01
available directly from stevensaero.com.
1. Purchase the 10F Capacitor-Power parts kit from stevensaero.com you’ll need to provide a
suitable motor and battery connector set based upon those required to t of your coreless motor
and charge battery.We used a micro battery extension cable part SAUMEXT/3 that is compatible
with the recommended 160 mAh 3.7V charge battery.
2. Install the capacitor.Position the PC Board (PCB) so that the“stevensaero.com” text faces up.
Pass the positive and negative wires of the 10F capacitor through the board as illustrated.Note:
The 10F capacitor is extremely sensitive to reversed polarity and will typically have a stripe
running down the body of the capacitor to identify the negative lead.The wire closest to the
stripe is negative and is typically shorter than the positive lead wire.Do not reverse the polarity
of the capacitor within the assembly as this will destroy the capacitor. Once installed
properly, with the PCB ush on top of the capacitor, solder the capacitor to the board and trim the
excess wire leads.
3. Install the resistor.Bend the wire leads perpendicular to the resistor and place through the top
of the PCB as illustrated.Solder and trim the excess wire as in the previous step.
4. Battery and motor connector.In this example we used a simple 3 inch micro battery cable
extension from stevensaero.com (SAUMEXT/3).Cut this part into two pieces – leaving 2 inches for
the battery side and 1 inch on what will become our motor-side connector.Note:In practice this
is a workable arrangement.However, depending upon the connector supplied with your micro
motor, you may nd the electrical connectivity through the motor connector to be quite poor – I
prefer to direct solder my motor to the capacitor assembly.
5. Solder the motor and battery connector to the PCB using the terminal designations for battery
(Bat) and motor (Mot) given in photo “Capacitor 3”as a reference.
6. Assemble the motor. We used an 8.5 mm coreless motor recovered from a damaged ultra-micro
model (PKZ3624). This motor is delivered in a gearbox and must be removed from the gearbox
and stripped of the pinion gear. Use a heavy pair of pliers to smash/crush the brass pinion gear –
the crushed gear slides offthe motor without damaging the delicate shaft. The motor housing is
then wrapped in masking tape or sleeved with a short length of heat shrink tubing. The propeller
GW HD 2.5 x 0.8 is press t to the motor shaft with the numbers facing the motor (pusher
conguration). So as not to damage the motor during installation, use a #11 hobby knife to
lightly chamfer and relieve the propeller shaft hole. Gently press the propeller onto the shaft
(numbers forward) while supporting the backside of the motor housing. Note: Using excessive
pressing force will damage the motor housing – slightly enlarging the shaft hole in the propeller is
always better than using brute force.
7. Friction t the completed capacitor-power module within the airframe (tape or glue in place only
if absolutely necessary). Pass the motor lead through the 1/4 in. diameter hole at the trailing edge
of the right wing panel and connect to the capacitor-power module. Glue the motor on top of the
motor mount centered along the centerline of the airframe. Continue to the “Flying Instructions”
to prepare the completed microHawk for it’s rst ight.
Capacitor-Power Module
microHawk Build Instructions. © 2016 Stevens AeroModel all rights reserved. Page10
□
□
