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SECTION 7: COMPLIANCE VERIFICATION SHEET
HORIZON STABILITY SYSTEM
There are multiple features built into the Horizon ET to achieve a safe degree of
pitch stability. These are:
1-
Reflex (rebend) in root area ribs.
2-
Tip wand angle setting.
3-
The airfoil shape in all ribs.
4-
Wing twist.
5-
Trailing edge bridle cable.
The first four we have fine-tuned into the Horizon for the best flight
characteristics. The Horizon will not be airworthy with only the first four features.
The Horizon will not be pitch positive at the critical low angles of attack with out the
reflex bridles attached. Proper reflex bridle height on the Horizon is highly important
and is directly related to stability and airworthiness.
In order to verify the proper height of the bridles you must take a measurement at
each rib station. To do this you must lay the wing flat (“flat bar”) on a level surface
with VG off. If the area is not flat your distance from ground to sail hem may not be
accurate. The distance from the surface (ground) to the hem of the sail next to the
rib is as follows:
RIB 160 180
#2 --
6.25”
#3 --
8”
#4 --
8.5”
