Hyperion BF109 25e User manual

Hyperion BF109 25e
Before beginning construction please carefully read the following safety notes.
•The Hyperion BF109 is a fast and highly maneuverable airplane. It is NOT intended for beginners.
However, anyone with experience building and flying a few models, including one with aileron control,
will be able to master the BF109. We strongly suggest setting transmitter dual rate low switches to
60% of recommended throws for aileron and elevator for the first few flights. If you have any worry
about the first flight, don’t hesitate to ask an experienced modeler to check the model setup and test
fly the model for you.
•Never fly a model airplane without a current membership in the R/C organizing body in your country.
That may be the AMA in the USA, or the FAI in many other countries. Membership should include
liability insurance. Check to be sure that you have it.
•Always check your flying field to be sure that it is safe before launching your model. Do not fly where
others, especially children, may come into the flight path without your notice, such as a public park.
•Be sure that your transmitter, receiver, batteries, and servos are in good condition before every flight.
Check carefully to see that no one else is using your frequency near your flying site.
•Many crashes are due to poor connectors or improper soldering between battery and ESC, or ESC and
Motor. Experienced builders: Don’t let pride stop you from checking to be sure that EVERY solder joint
is good. Re-solder with a HOT iron if you have any doubts. Use only quality gold-plated connectors.
•Test motor/controller/battery setup without propeller attached first. When propeller is attached and
battery is connected, be sure that the model is restrained at all times. Never put any part of your body
in front of a spinning propeller.
•ALWAYS do a range test before first flight. See your radio manufacturer’s recommendations for proper
range testing. If none is given, use the following: With antenna DOWN, range should be at least 25M
(80’) before servos jitter. With antenna UP, 100M minimum (330’). Two tests should be performed,
one with the motor on and one with the power off. The range with the power on should be no less than
90% of the range with power off! When flying, keep your transmitter antenna pointed near vertical;
never point it directly at the model.
Required Gear:
Transmitter: 4-Channel minimum, 6-Channel preferred
Receiver: 4-Channel minimum, 6-Channel preferred
*With 4-Ch systems; a “Y” harness is required to
connect the two wing servos. Use wheel collars to lock
the retracts in the “down” position
Servos: 4/5 Micro/Mini 13g~30g in weight
*ATLAS DS12SCP Digital Servos for Ailerons & Elevator
*ATLAS DS13TMB Digital Servos for Retract and Rudder
*OR W-150MGR 110-deg for retract
Servo extension wires:
2x 200mm extensions for Wing Servos (HP-WR-004)
3x 100mm extension for Retract Servo (HP-WR-003)For 4 channel receiver: HP-WR-013 “Y” connector
Brushless Motor and controller set: For super performance, use…
Hyperion HP-Z3025-08 motor, TITAN 50A or 80A Brushless ESC (OPTO or SBEC Types), and HP-Z30-BKMNT-L Back-
mount Set (this is available as a motor set with discount in most shops) Recommended Prop: 10x7-11x6 APC E
Motor Battery: 3300~4350mAh 18C~25C LiPo 3S
Radio Battery: 2000mAh 4-5 Cell (for OPTO ESC) *Suggest LVX 3300-4350-3S
*Suggest Hyperion IB-PR**-2000
Suggested connectors:
Motor<>ESC : 3.5mm Gold Short Bullet Connectors
ESC<>BATTERY : Dean’s Ultratm Connectors
Other: “Velcro™” hook-and-loop tape, and double-sided sticky tape is handy to secure radio gear
Required Tools:
*Small and Medium-sized Phillips (+) screwdrivers *Sharp hobby knife, Sharp scissors
*Small “needle-nosed” pliers and Strong Wire Cutters *Metric Hex Wrench set
*Metric Drill bits (1.0, 1.5, 2.0, 2.5mm) *A black marker pen
*Epoxy 2-Part Glue, 5-Minute and 30-minute types *CA Thin (fast setting) and Medium CA super glue
*Straightedge ruler (thin metal type is best) *Electricians elastic tape
*Measuring Tape *Silicone sealant (or bath caulk)
FOLLOW THE ORDER GIVEN BELOW, RATHER THAN THE PICTORIAL MANUAL!

Typical hinge installation:
•Fold each hinge in half so you have a center line reference. Install the hinges in the non-moveable
surface half way, and fix with fast CA.
•Install the non-moveable surface to the moveable surface and press them firmly together until no gap
exists, then deflect the moveable surface all the way in one direction, hold in position, and fix hinges
with a drop of CA glue on each hinge.
•Move surface all the way the opposite direction and put a drop of thin CA on each hinge.
•There should be a hairline gap between the two parts, and no CA should be allowed anywhere but on
the hinges.
•For best flight performance, tape the hinges to seal the air gap between the surfaces.
Typical Quick Link (Linkage Stopper in photo manual) adjuster installation:
The servo horns must be drilled to 2.0mm to fit the Quick Links. You MUST use a tiny drop of THIN CA glue to
secure the nuts on the Quick Links after you have adjusted them so that they are free of slop, yet non-binding.
Diagram #1 - AILERON
*Install hinges for right and left ailerons.
*Remove the covering around the aileron servo mounting wells and the retract openings with sharp knife.
Diagram #2 - AILERON SERVO & LINKAGE
*Drill 1.0mm holes in the wood blocks for the servo screws. Apply a TINY bit of fast CA glue to each screw hole
to harden it. CA or epoxy the wood block to the aileron top plates.
*When mounting the servos to the top plates, sand the servo case side (use 220 grit) which contacts the plate
and use a little silicone sealant between servo and plate.
*There are circular holes in the wing TOP just behind the main spar at the root to allow servo leads out.
Remove the covering from these holes.
*Attach servo extensions to the servos, and feed the extensions through the wing until they come out the holes
we just opened in the step above. Test fit the servo plates into the wing (use a little tape if you like.)
*Plug servos into the correct channel positions in your receiver. Turn on transmitter, and check to be sure that
servo mixing is properly set (if using 6ch setup), that trims are “zero”. Connect 4.8V test battery to receiver.
*Check that servos rotate in the correct directions.
*With servos centered, install servo horns with the arm pointing 90 degrees to the servo mounting plate.
*Install servos plates into wing as shown with supplied screws.
*Install Z-Bend piano wires in the fiber glass control arms. Assemble aileron linkages to horn as shown, top
hole.
*Slowly test aileron travel. Adjust servo travel via transmitter setting as required. (12mm throw, max)
*Disconnect power from receiver, turn off transmitter.
*Install the aerodynamic PVC servo cover with silicone or clear tape.
Diagram #3 - RETRACT
*Install the Z-Bend pushrod wires into the horns on the retracts FIRST (pushrods not shown), then slide the
retract into position while feeding the pushrod wires through the holes in the wing ribs. Fix retracts using
screws as shown.
Diagram #3 - MAIN WHEEL
*When you are satisfied with retract installation, install the gear covers. They can interfere with retract
operation. Instead, hold in position and tack glue the covers to gear wires with CA glue. Then use silicone
sealant to “fillet” on either side of the gear legs. The silicone allows the gear legs to flex but still retains the
covers well. Degrease gear legs before applying silicone.
Diagram #4 - WHEEL WELL
*Trim the PVC covers with scissors/knife and trim as necessary to get a proper fit. Open a 15mm hole in the
center of wheel well to allow clearance for the wheel collar. Glue the covers in place.
Diagram #5 - MAIN WING
*Cut indicated areas for the retract servo gear hole.
*Lightly sand the covering away from faces of the wing root, so the two wing halves fit together with no gap.
*Cut 6 pieces of electricians tape, about 10cm (4”) long each.
*Mix up some 30-minute epoxy, and dab some inside the spar slot on each wing side. Coat both wing root
faces with some epoxy (not too much!)
*Insert the wing joiner into each wing half, and slide the assembly together.
*Stretch the electricians tape a bit as you use it to hold the wing halves together at front, center, and rear - on
both top and bottom of the wing.
*Set aside on some blocks to hold wing shape, but stay nearby to make sure the wing remains tight and
properly aligned until the epoxy cures.

TIP: *If you do not want to use retracts, pull the actuation rods until both wheels are locked fully DOWN.
Install a wheel collar over the rods to lock down the retracts.
Diagram #6 Install the scale drop tank as shown with CA
Diagram #7 – LANDING GEAR SERVO
*Install the retract servo tray with CA or epoxy. Install retract servo using screws as shown.
*Assemble the servo arm with the Quick Link style connectors but do not install the servo arm on the servo at
this time.
*Turn on the transmitter and receiver and set the retract switch so the landing gear is in the retracted position.
*Use the servo reversing switches to make sure the servo rotates in the correct direction before installing the
servo arm.
*With the servo arm installed, the retracts and the retract switch in the retracted position, turn the wing over
and drill a 2-3mm hole in each half of the lower wing sheeting to gain access to the Quick Link set screws.
*Adjust the retract pushrod wires as needed and tighten the set screws on the Quick Links. Test the retract
system to make sure everything works properly.
*Make any adjustments needed to make the system work perfectly.
Diagram #8 - STABILIZER
*Remove covering from horizontal stabilizer area shown. IT IS EXTREMELY IMPORTANT THAT YOU DO NOT
CUT INTO THE BLASA. Use a VERY sharp knife along a straightedge with very light pressure, then test to see if
the covering can be pulled away. If not, make another LIGHT pass with the knife and test again.
*Check the elevator slot in the fuselage to insure that it is free of burrs that might scrape covering. Deburr
with hobby knife if needed.
* DO NOT INSTALL HINGES YET! Remove and set the hinges aside.
*Slide the elevator through the slot in the fuselage.
*Slide the horizontal stabilizer through the slot in the fuselage.
*Now install hinges for the horizontal stabilizer and elevator.
*Align the horizontal stabilizer in the fuselage and measure right/left sides to front-center of fuselage, to be
sure that it is aligned properly in yaw axis. A few straight pins are handy to temporarily fix the stabilizer.
When satisfied, glue only ONE intersection of stabilizer and fuselage with CA.
*Now check that the horizontal stabilizer alignment is 90 degrees to vertical stabilizer. When satisfied, glue the
other three intersections with CA Glue. (“medium” CA Glue is useful here to fill gaps)
Diagram #8 – Rudder
*Assemble the Tail-Wheel Assembly as shown. Glue tail wheel wire into Rudder using 5-minute epoxy, as
shown.
*Now install hinges for the vertical stabilizer and rudder.
*Screw the tail wheel mount to the bottom of the fuselage using the supplied screws.
Diagrams #9 #10 #11 - LINKAGE - Assemble as Shown
TIP: Install the pushrods into their tubes, fit the horns to the Z-Bends, and THEN screw the horns onto the
elevator and rudder servos.
Diagrams #12 - MOTOR MOUNT
#12 Electric mount: Install the Hyperion Z3025 motor using back mount set HP-Z30-BKMNT-L. First mount
the Wood Mount to firewall of model as shown, using supplied M3 screws and blind nuts. Then screw the black
“cross” plate to the motor using the taper-head screws supplied with back mount set, with a small amount of
thread-locking compound (Loctite) on the threads. Warning! Back plate mount screws must not extend more
than 4mm into motor. Warranty is void if longer screws are used. Finally, mount the backplate and motor
assembly to the firewall using the supplied sheet metal screws.
TIP: For better scale appearance, instead of screws, use a thin bead of GREY silicone sealant around the lower
painted areas of cowl, and hold down until dry using electricians tape. If you mess it up, wait till the sealant is
fully dry before peeling it off and trying again. Scuff the inside of cowl with sandpaper (but not the clear
areas!) before applying the sealant.
Diagram #13
Use two PM3x20mm bolts with two d3xD12mm washers and the ply plate shown to fasten the wing to the
fuselage. Be careful not to trap any servo extension leads between the wing and fuselage.

Diagram #14
Use medium CA to glue the scale details, the exhausts, oil cooler and canopy top the fuselage.
Diagrams #15 CONTROL THROWS
*The suggested control throws are more than adequate for spirited roll rates, loops, and performance in
general. For less experienced pilots, we suggest that you set these on the “high rate” switches of your radio,
and do your first flights on “low rate” with the switches set for about 65~75% of max throws. Also some
exponential (30% or so) on elevator and aileron make it less sensitive.
Diagrams #15 - Center of Gravity (CG)
*The recommended starting CG is 90mm (3.54”) from the LE at the root. Do not fly the plane with the CG any
farther back than 95mm (3.74”). For first flight, 85mm may be best (3.34”).
*Keep in mind that the BF109 is a scale model, with higher wing loading than “park fliers” and many sport
electric aircraft. As such, maintain good airspeed at all times, and be sure that your landing zone is long
enough for approaches at 22~25 miles per hour. The BF109 is a real sweetheart to fly though, with excellent
low-speed handling and no bad habits…so don’t be nervous.
FINAL SETUP
*Install your receiver, motor, controller and battery as recommended by the manufacturers.
•See Setting, Control Throws, and CG sections for recommended setup. Also check that the model is
balanced Right/Left (roll axis) and add lead weight to one wingtip if necessary.
•Set your DUAL RATE LOW Switches for Elevator and Aileron to 60%~75% of recommended throws, and
use DUAL RATE LOW for the first flights.
•Range Check your radio system before flight.
•Have an experienced pilot confirm correct deflection of all control surfaces and proper CG before flight.
•We’ve found it best to fly off of hard packed dirt, asphalt, or closely cropped grass.
HAVE FUN FLYING! The Hyperion Team.