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48 Bu il d Y o ur O w n Q u a d c o p t e r
Figure 3.21 Motor mount assembly diagram.
1. Gather the items listed in the Figure 3.21.
2. Attach each motor (item 1) to a motor-mount bottom plate (item 8). Use four 3-mm
× 6-mm screws (item 9) for each motor.
3. Use two ∕8-in (1-cm) pan-head screws (item 5) and two internal tooth-lock washers
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(item 6) to attach two ∕8-in (1.6-cm) nylon standoffs (item 7) to each motor-mount
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bottom plate. Use two more ∕8-in (1-cm) pan-head screws and internal tooth-lock
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washers (item 6) to attach each motor-mount top plate (item 3) to the nylon standoffs
(item 7).
4. note: I have added the following step to tidy up the boom wire installation.
Drill a ∕32-in (0.4-cm) diameter hole that is located ∕2 in (1.3 cm) away (toward the
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motor end) from one of the two holes that are spaced 2 ∕4 in (7 cm) apart. Refer to
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Figure 3.22 LED power lead access hole position.