SPORT ROCKETRY JANUARY/FEBRUARY 2020 21
[13.5 in.]
342.9 mm
Leading Edge
Trailing Edge
blade construction
balsa with ammonia, and placing on a 40
wrapping tightly with an athletic bandage.
Blade Planform
Scale 2:3
Tip
Blade Attachment View
SCALE 1 : 1
24°
Blade Attachment Side View
(Viewed tip to root)
SCALE 4 : 3
Blade Jig for Cutout
SCALE 1 : 2
Cutout for attachment
Blade stop
Example Blade Jig for Hinge Alignment
SCALE 1 : 2
Alignment Guides
Used to ensure proper
blade alignment.
Blade
Spruce Lever
Arm
Spruce Standoff
View
1/32 in. lightweight 4 to 6 lbs. balsa
Pitch angle at tip is 0
and at root is 24 .
This pitch angle results from the geometry and construction of blade. The
blade should be attached to the hub so that the hub is parallel to the
pitch angle of the blade tip.
A jig is strongly recommended to achieve the correct attachment angle
and placement on blade so the rotors most efficiently fit in body.
Fluorescent bulb cover
