66
AeroVee 2.1
Rev Z. 01/14/2015
Sonex Aircraft
LLC
© 2014 All Rights Reserved
1/4" or less
5/8"
5/8"
1"
Left Cowl Half
Right Cowl Half
Cylinder Head Cooling Air Cut-outs
These photos identify the depth of the cowl lips for the cylin-
der head cooling air.
1/8"
1/2"
5/8"
3/8"
5"
2"
5"
Oil Cooler Inlet
APPENDIX A - SONEX COWL OPENINGS
Oil Cooler Inlet Cut-outs
important: due to slight variations in each installation, the
location of the oil cooler inlet may vary slightly.
Important: Even if you do not fit an oil cooler you must
provide this cut-out so cooling air will flow over the bottom
of the oil sump.
The approximate location of the oil cooler inlet is shown in the
photo below. The exact location can be determined by fitting
one cowl half and centering the cut-out on the oil cooler baffle
fitted to your engine (see bottom photo).
This photo identifies the size and approximate location of the
oil cooler inlet.
While the top photo gives approximate dimension for the loca-
tion of the oil cooler inlet, fitting one cowl half and marking
the exact location will ensure the correct fit for your airplane.
Note that the oil cooler inlet is required even if no cooler is
installed, as on this airplane.
Proper cooling inlets and exhaust outlets are critical to proper
engine cooling. Arbitrarily changing any of the defined open-
ings can have a negative affect on cooling.
This Appendix details the cowling inlets and outlets of a
Sonex Aircraft cowling fitted to a Sonex, Waiex, or Xenos.
The cowling of a Onex airframe is supplied with all cut-outs
pre-finished so no additional details are provided in this
manual.
