The XA41 has plenty of aerobatic chops, but it’s easy for most sport fliers to handle.
that the wings stay attached during mid-speed snap rolls.
It should be no surprise that the Sbach breezes through
all of the standard aerobatic moves. High-speed knife-edge passes require only moderate rudder input and there
is almost zero pitch or roll coupling. As you slow down
and feed in more rudder, the coupling becomes more
The XA41 is well behaved at slower speeds. Even at stall
speeds, the wings stay level and spins must be induced. An
obvious signature of an impending stall is a high sink rate.
When landing the Sbach, I like to keep a few clicks of
throttle and touch down on the main wheels. The model will
land at lower speeds, but the necessary flare causes the tail
wheel to touch first. Then things can get bouncy—at least on
the paved runway I typically use.
Before I review the XA41’s 3-D abilities, I first have to
admit that I’m not a 3-D master; I dabble. Second, 3-D
performance is heavily dependent on wide-ranging variables
such as thrust, servo torque/speed, CG, etc. Take my words
with the appropriate measure of salt.
The XA41 definitely has 3-D maneuvers in its repertoire. It
handles everything in my limited playbook without breaking
a sweat. In more capable hands, I’m sure it could do it all.
What I noticed, however, was that to get the elevator and
rudder authority I wanted for 3-D flying, I had to set the
CG where standard flight was no longer enjoyable. I haven’t
found a setup where the two types of flight are not mutually
exclusive, but I’m still experimenting.
Sig Manufacturing has broken away from its traditionally
boxy, yet much-loved, designs with this bold, curvy aerobat. It
is definitely an attention-grabber. It can be tamed to satisfy the
Saturday afternoon ambitions of most sport fliers, but can also
be uncaged to release a speedy, spar-bending tumble that could
make its full-scale German cousin über-grün with envy!
Sig Manufacturing Co.
64 Model Aviation M AY 2014