Steady progress has been made on the Onex since it was publicly announced
last July at the AirVenture Fly-In. We've completed the designs of the spar,
wing panel layout including wing skins, wing ribs/rib tooling, hinge and pin
release mechanism, and aileron bellcrank assembly. The tail design is also
complete along with the high-level aft fuselage layout. The landing gear has
been designed and is being manufactured.
The basic construction is nearly identical to the Sonex, Waiex, and Xenos.
Primary structure is 6061-T6 aluminum with blind stainless steel rivets used
throughout with the exception of the main spar assembly. This allows for the
same light, efficient structure. The same tools used on Sonex construction
will also be used for the Onex. Since it's a smaller aircraft in every
respect, you'll use all these tools less and obviously have a lower build
time. Laser-cut and hydraulic formed parts as well as the increased use
of machined parts are being utilized to reduce part counts and keep project costs down.
WING AND WING AIRFOIL:
The airfoil is the same modified 64-415 airfoil as the Sonex and Waiex
scaled to a (shorter) 50" chord. The aileron section is shared with the
Xenos. The wing area was carefully calculated to allow for the Onex to
be fully sport pilot compliant.
LANDING GEAR AND GEAR CONFIGURATIONS:
The landing gear is a custom-built bent aluminum gear. The bent aluminum
gear design was pioneered on the Sonerai I and has become a standard on
many modern homebuilt aircraft. We selected this gear for the Onex for two
basic reasons: The gear can be simply shifted from the standard gear
position to the tri-gear; A new integrated axle design on the Onex aluminum
gear also saves parts and makes for a streamlined gear without needing gear
fairings. The same Sonex/Waiex std- and tri-gear configuration options will
be offered for the Onex.
The AeroVee is a perfect fit for the Onex just as it is for the Sonex,
Waiex, and Xenos. Since the Onex has lower frontal area, a narrower airfoil,
and a lighter weight we expect the performance to obviously be better than
the Sonex. Cruise speed of a Sonex with AeroVee is 130 mph with a top speed
of 150 mph. A cruise speed of 140 mph with a top end of 160 mph can be
expected with the Onex. These numbers will be published once performance
numbers are measured from the flight test phase.
The most unique and exciting design feature of the Onex is the folding wing.
Extensive design effort has been spent to eliminate parts and make for a
simple wing folding procedure that can be easily accomplished by one person.
A lever with a handle protruding out of the bottom of the wing on each side
approximately 3 feet outboard pulls both main and rear spar retaining pins.
A securing pin keeps the handle in the closed or open position and a visual
indicator protrudes out to the top of the wing to clearly signal the pilot
if the pins are not in the proper position.
Continuing in the tradition demonstrated in the Sonex, Waiex and Xenos, the
Onex will add another level to low cost, fun flying with it's keep-at-home
folding wing. No hangar rent and excellent fuel economy combine to keep
your recreational flying costs as low as possible... all without compromising
As is the case with the rest of the Sonex Aircraft family, the Onex will be
fully aerobatic. The Onex is being designed to 7G’s, knowing that the
average Onex pilot will want to fly Aerobatics on a regular basis.