Flying / Summary
binding the model to my JR 9505 transmitter, I set all the control
surfaces to 100% throw and 30% exponential. For low rates, I
used 70% throw. The suggested CG location is 82mm forward from
the trailing edge of the aileron at the fuselage but can be
easy adjusted to your own preference by moving the flight battery
along the fuselage.
the Extra 300 can be flown off a hard surface, it is equally
fun to hand toss it over grass. We tested the model over grass,
for safety, in a school soccer field down the street. After
giving it a light toss, it needed no trim adjustments to allow
it to perform aerobatics or hover in place. We used a normal
upright launch and the so-called Epic launch inverted from the
prop. My first impressions were that it is an awesome 3D plane!
video of the UMX Extra 300 3D shows just how versatile this
little 3D plane really is. It can be flown in small spaces even
with some wind. The wing loading is so light that I feel minimal
piloting skills are needed when flying over grass for safety.
The 1.2oz plane would be difficult to hurt on grass and it is
truly an impressive micro-flyer than can be used for learning
basic aerobatics or advanced 3D maneuvers!
Extra 300 3D Flying
Video (16 meg)
landing in grass, the UMX Extra 300 3D can be lowered in a harrier
or simply plopped down without any damage. The power system
provides excellent authority with straight up vertical runs.
more docile flying, the recommended low rates from the manual
(below) are probably best used by intermediate skilled pilots.
Although the Extra 300 3D is not meant for the beginner pilot,
I feel that it would make a great model to learn the basic maneuvers.
The control surfaces offer excellent authority even when the
plane is flying slower or as a sport flyer.
Side Force Generators (or SFGs) are designed to help with knife-edge
flying. Although we didn't need them, it is a nice added bonus
in the kit for pilots learning the basic maneuvers. The laser-cut
foam base with a micro-thin film provides an extremely light
airframe that is strengthened by strategic use of carbon fiber
reinforcement to reduce flexing. This Ultra Micro eXtreme (UMX)
design really delivers a no-compromise flying experience! Since
the UMX Extra 300 3D is slow and light enough to fly sport maneuvers
or extreme 3D maneuvers in very small spaces, it deserves a
thumbs up for a wide range of piloting skills.