Extreme Flight 78" EXTRA 300 ARF User manual

125" EXTRA 300
ARF
Assembly Manual

Congratulations on your purc ase of t e new Extreme Flig t RC 125" Extra
300. T is airframe is t e culmination of several years of design, revision and
flig t testing, resulting in a top quality competition grade aircraft. T is
airframe comes ig ly prefabricated allowing one to assemble and fly t e
Extra wit minimal effort.
T e Extra 300 was designed to excel at IMAC and invitational sequence
flying. It is also a very capable 3D aircraft in t e ands of an experienced
pilot. T e Extra's fuselage as been stretc ed to t e maximum allowable limit
providing for an aircraft t at tracks extremely well and will certainly prove
itself a contender in t e upper classes of competition flying.
T is aircraft is intended for experienced pilots wit a t oroug knowledge of
giant scale aircraft power systems and radio/servo/linkage set-ups. As suc
t e assembly manual is brief and outlines t e important points t at must be
addressed t at are unique to t is airframe. Personal preference based on
previous experience will dictate finis ing details suc as radio/battery
installation, fuel tank c oice, installation and plumbing, grap ics c oices and
installation. If you are not experienced enoug to make t ese decisions I
ig ly recommend t at you start wit a smaller, less expensive aircraft in t e
30cc-50cc range to learn t e important basics of flying and maintaining
gasoline powered aircraft before stepping up to suc an expensive and
potentially dangerous aircraft.
Extreme Flig t RC, LTD. in no way accepts or assumes responsibility or
liability for any damage, destruction of property, injury or deat associated
wit t e use of t e final user assembled product. If you are not willing to
accept any and all responsibility for t e use of t is aircraft please return it to
t e place of purc ase immediately.

Wing assembly
(Please note t at we ig ly recommend t e use of 3 ultra torque servos for aileron
actuation. We did extensive testing using bot 2 and 3 servos and t e gain in roll and snap
performance using 3 servos is by far wort t e investment in additional servos and t e time
required to properly set t em up).
1. First I ig ly recommend t at you take a few minutes and go over all seams wit a
covering iron on a medium setting, paying special attention to stripes and areas w ere
covering overlaps.
2. T e ailerons use a unique pocket inge system. T ere are two rods t at act as t e inge
pins for t is system, one inserted at t e tip of t e wing, t e ot er t roug t e root. Use a
flat ead screw driver to back out t e t readed portion of t e rods and put a few drops of
blue Loctite on eac . Re-tig ten t e t readed portion into t e t readed insert. Make sure
to do t is for bot wings.
3. Next we'll install t e aileron control orns. It is imperative t at you pay close attention
during t is step. In order to provide t e proper linkage geometry eac set of aileron
control orns as a ole drilled in a different location to compensate for t e varying
t ickness of t e wing and aileron. T e picture below illustrates t e proper location of eac
set of orns.

4. Use a s arp obby blade to remove t e covering over t e slots at eac of t e 3 locations
w ere t e dual truss control orns will be installed. Place t e orns into t e base and
insert into t e slots in t e aileron. Trace around t e base wit a fine tipped felt marker.
5. Use a s arp obby blade to remove t e covering 1/16" inside t e line you ave traced so
t at t e fiberglass base plate will cover t e exposed edges and prevent t em from lifting.

6. Scuff t e portion of t e control orns t at will be glued into t e aileron wit sandpaper
to remove t e glossy s een and clean wit denatured alco ol. Mix up some 30 minute
epoxy (I prefer Mercury Ad esives 30 minute formula). Use a piece of pus rod or old
obby blade to fill t e slots in t e aileron wit epoxy. Coat t e entire area of t e orns t at
will insert into t e aileron and t e bottom of t e base plate wit epoxy. Insert t e orns
into t e slot and pus down until t ey are flus wit t e base plate. Use a paper towel
soaked wit denatured alco ol to remove t e excess epoxy. Insert a 3mm bolt t roug t e
oles in t e orn to insure proper alignment. Repeat t is process for t e remaining control
orns.