Davis Spar-Fly User Manual

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#1310
Spar-Fly
INSTRUCTIONS
Davis Spar-Fly is a wind indicator which mounts on any mast-
head. Spoiler holes reduce lift and increase accuracy. Needle
bearing balance provides high sensitivity. Highly visible from
deck. High impact plastic vane and marine grade metals for
unsurpassed durability. Weighs only 1.25 oz. (35 g). Spar-Fly
is unaffected by angle of heel. Hardware included for either
top mounting or quick-release side mounting.
Assembling the Vane
Insert spire downward from top into plastic chassis
(as shown below).
Do NOT attempt to insert from the bottom. Follow
these instructions precisely. Now, with finger, press
needle bearing housing into hole in top of plastic
chassis. Continue to press housing against a solid
object (such as a table) until it is seated, but don’t
press so hard that spire bearing becomes jammed.
Test to make sure vane spins freely on spire. No
lubrication is necessary.
Balancing the Unit
Hold Spar-Fly at a 45° angle to the floor and adjust
weight and locking nut until it is in lateral balance
(as shown below).
When balanced, tighten nut. Test sensitivity by walk-
ing past Spar-Fly in a closed area before mounting.
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Summary of Contents

Page 1 - Spar-Fly

#1310Spar-Fly™INSTRUCTIONSDavis Spar-Fly is a wind indicator which mounts on any mast-head. Spoiler holes reduce lift and increase accuracy. Needlebea

Page 2 - Mounting Spar-Fly

On wood spars, attach base to masthead using longbrass wood screws. On metal spars, use stainless steel self-tappingscrews provided. Otherwise drill a

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