Attach the propellers
Note: There are two kinds of propellers, the clock wise (CW) and counter clock wise (CCW)
propellers, each kind has their own bag in the box. Notice the shape of the tips, the sharper
corner is on the back side of the rotation direction. The CW propellers are also usually
marked with an “A”, “A1” or “A2”, while the CCW propellers are marked with “B”, “B1” or “B2”
(the number is irrelevant).
Also make sure that the correct side is facing up, the top side should be convex.
Here’s a detailed view of where to attach CW and CCW propellers.
Attach the foam pad
The rubber pad should be attached to the Crazyflie 2.1 between the expansion headers on
the top side. This will create friction to keep the battery from slipping out and also protect the
electronics.
Attach headers
There are two types of headers in the box, long and short ones. Find the two short ones and
insert them into the expansion connector.
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