OWL MDM-1 Fox User manual

OWLplane.com
Print Your Plane As Many As You Like
Rev. 1.2

OWL MDM-1 Fox
OWLplane.com
Page : 2
Table Of Content
OWLplane 3D Printed Models .....................................................................................3
OWL MDM-1 Fox............................................................................................................4
Specication ............................................................................................................ 4
Center of Gravity (CoG).......................................................................................... 4
Recommended Setup.............................................................................................. 5
Tools and Materials ................................................................................................ 5
Hardware Needed ................................................................................................... 6
Setup for Servo Travel/Throw.............................................................................. 7
3D Printed Motor Mount, Propeller Spinner, Collet and Spar......................... 8

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OWLplane 3D Printed Models
Thank you for your interest/support/purchase of our RC Flying Models. It is all started in 2108 with the
introduction of 3D Printer Technology (becoming our hobby). After having understand much with the
technology, we continued creating and developing RC Flying Models. Once we feel that the designed
Models are fun to y, easy to assembly, acceptable strength and weight, it is time to share and
introduce the Models to the market.
We believe that 3D printing technology will continue to grow supporting and becoming part of
aeromodelling hobby. Certainly, it is not merely without challenges. Printing single perimeter on a CAD
design to come up with a strong and light 3D printed object is not easy since most available laments in
the market still having too high in their density (comparing to the nal result of airplane model in
traditional aeromodelling hobby). Fortunately, there is lament manufacturer that producing a
lightweight lament. It is called LW-PLA. Comparing to nal printed PLA density, it is very promising to
3D printed aeromodelling hobbyist. Unfortunately, it is still not widely available yet in the market to
purchase and also relatively having high price tag.
Another issue in 3D printed aeromodelling is that it is also quite challenges when assembling the parts.
It really depends on how the designer come up with his/her 3D model creation. The designer also needs
to consider the total weight produced when designing the plane without sacricing simplicity and
easiness when assembling the parts. Here is the list of challenges but not limited to when designing a
3D printed plane:
• Material Density and Other Characteristics (Filament types and its characteristics)
• Printer Capability Delivering Printed Object (Printer and its technology used)
• Single Parameter Printing Technique (Slicer capability)
• Design Factor (CAD Model itself)
We understand the challenges but will always try to improve and nd the best solution. It is
understood that this new hobby still have much room of improvement. It will be never end since the
hobby itself always seeks for improvement and new things anyway. So far, we are very happy with our
design after we feel nding the optimal result printing with available widely used laments such as
PLA, ABS, ASA and HIPS. It does not mean that OWLplane does not support LW-PLA. For sure, printing
with LW-PLA always deliver less weight but to go down reducing weight up to 30%, we do not need LW-
PLA, replace your Nozzle to 0.3mm and it will rock the results ! The following are what would you
expect to have in downloadable le emailed to you:
1. STL les.
2. G-code using PLA type laments with Prusa i3 Direct Driver and/or Bowden type Printer.
3. ideaMaker, Cura and S3D OWLplane Prole les for 0.3mm and 0.4mm Nozzle.
4. Instruction Manual Documents.
5. Motor Mount, Servo Cover and/or Servo Bridge STEP les for you to customize whenever
necessary (subject to the plane model).
HAPPY AND SAFE FLYING

OWL MDM-1 Fox
OWLplane.com
Page : 4
Wing Loading : 46.8 - 49.4 gr/dm^2.
AUW/Flying Weight : 1.800 - 1.900 gr
(with battery 2200mah 4s).
Wing Area : 38.5 dm^2.
Wing Cube Loading (WCL) : 7.5 - 7.9.
Flight Performance Category : Trainer
Aerobatic.
Radio Channels : Throttle, Aileron, Flap,
Elevator and Rudder.
Length : 1.222mm.
Wing Span : 2.388mm.
OWL MDM-1 Fox
Specication
Click here if you would like to know about WCL (comparing how easy to fly the plane best described by utilizing WCL instead
of Wing Loading. The plane with the same Wing Loading is easier to fly with higher Wing Area than smaller one). It can be
best desribed by WCL value.
Center of Gravity (CoG)
CoG is 62mm from Wing Root Leading Edge. During maiden, please allow 3 - 4mm toward the nose (forward), start
with more solid ying and adjust gradually during the next ight

OWL MDM-1 Fox
OWLplane.com
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Nose Heavy Correction Available as an Option
▷When using heavy spinner and also attaching main gear extension, OWL MDM-1 Fox may end up in nose
heavy condition.
▷Many ways to make correction for this condition, one of them is to use "FUSELAGE-7 # P3_H15 v1.1" and
"FUSELAGE-7-LID # P3_H15 v1.1" instead of "FUSELAGE-7 # P3_H15".
▷Use some objects to put more weight into "FUSELAGE-7-LID # P3_H15 v1.1" (you may want to make some trials
to achieve optimal weight by temporarily attaching the lid with tape).
▷Once optimal weight is achieved, glue "FUSELAGE-7-LID # P3_H15 v1.1" into "FUSELAGE-7 # P3_H15 v1.1" to
make the correct shape of OWL MDM-1 Fox fuselage.
▷Better to use "FUSELAGE-7 # P3_H15 v1.1" and "FUSELAGE-7-LID # P3_H15 v1.1" instead of "FUSELAGE-7 #
P3_H15" in case CoG correction is required later.

Recommended Setup
Motor Options : 3548 with 790KV/900KV/1100KV motor
type (already tested it with 900KV, should work also with
790KV - 1100KV, see options above but not limited to).
Servo Options : 12gr Servos for Aileron, Flap and Rudder
and 17gr Servo for Elevator (see some options above but
not limited to).
ESC Options : ESC with 60A, just pick your favorite ESC
but make sure that rated at least 60A.
Propeller Size: depending on your motor KV. For 900KV
above, tried with 12x6 and also 11x7, it works great.
Battery Size : LiPo 4s 2200ma - 3300mah.
Tools and Materials
▷Printer, in general 200mm x 200mm x 200mm (W x L x
H) for all OWLplane Models.
▷Filament such as PLA, ABS, HIPS and ASA (do not use silk PLA, it tends to be very weak in layer to layer
adhesion).
▷CA glue with accelerator. Use thick glue to join surface to surface. Use thin CA glue for coating the joint
surface areas.
▷Velcro sticker/polyester hook and loop peel-n-stick self-adhesive for positioning and locking the battery.
▷Fine sandpaper.
▷Sharp knife.
▷Screwdriver and/or allen wrench for chosen screws/bolts.
▷Pliers, Needle-Nose Pliers, Nippers.
▷Steel bolt cutter.
▷Dremel/Rotary Tool for cutting carbon ber tubes and rod with more than 2.5mm.
▷Electric drill, its drill-bit size from 1.5mm - 5mm and step cone drill.
▷Propeller shaft reamer or hole puncher reamer.
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OWL MDM-1 Fox
OWLplane.com
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Hardware Needed
For Fuselage and Canopy:
▷M3 x 0.5mm thread x 12mm screws with their washers for outrunner motor to motor mount wall - 4x.
▷Self tapping screw M3x20mm or M2.5x20mm with their washers for mounting motor wall to the fuselage
(Fuselage - N0) - 6x.
▷4mm OD and 56mm steel long shaft for main wheel axles - 2x.
▷Landing gear wheel stop set collar 9x4.1mm for main wheel axles - 4x.
▷2.0mm OD and 36mm steel long shaft for tail wheel axle - 1x.
▷Landing gear wheel stop set collar 9x2.1mm for tail wheel axles - 1x.
▷Ballpoint pen springs for Canopy - 1x.
For Wings (excluded control surface):
▷3D printed wing and fuselage pin left and right - 2x.
▷1mm OD aluminum wire with about 40mm length - 2x.
For Elevon, Stabilizer and Elevon Servos:
▷1.5mm - 2mm rod for creating ap, aileron, elevator and rudder hinges (ER308L - TIG Stainless Steel Rod).
▷1.5mm - 2mm rod for ap, aileron, elevator and rudder pushrod (ER308L - TIG Stainless Steel Rod).
▷Landing gear wheel stop set collar 9x2.1mm for ap, aileron, rudder and elevator - 6x.
▷Linkage stopper D2.1mm for for ap, aileron, rudder and elevator - 6x.
▷2.0-2.5mm OD shaft for creating pins connecting two parts for aileron, ap and stabilizer.

Setup for Servo Travel/Throw
Suggested setup for medium travel/thrown are depicted below and you may adjust the setup according to your need.
Aileron A = 12 - 15mm.
Flap B = 15 - 20mm.
Flap C = 35 - 45mm.
Elevator D = 12 - 15mm.
Rudder E = 15 - 20mm.
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OWL MDM-1 Fox
OWLplane.com
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3D Printed Motor Mount, Propeller Spinner, Collet and Spar
Motor Mount Requirement
Motor mount wall should be 3D printed with more heat resistance laments such as ABS, ASA or HIPS. If your 3D
printer does not have enclosure you may want to try with PETG lament (more heat resistance than PLA/PLA+). In
case you still would like to use PLA, please do annealing process (not sure can do for standard PLA), some successful
with HT-PLA/Hight Temp-PLA. Click here for you to read about annealing article.
Propeller Spinner and Collet Requirement
OWLplane does not provide STL le for printed propeller spinner due to our concern about strength, shape and
uniform weight when spinning at high speed. Not all 3D Printer has really free of skew issues for all their axes. The
skew issue generates uneven shape that will lead to problem when spinning. Good spinner should be available in
your local hobby store or online store, even that spinner, you still need to balance it before using it.
OWL MDM-1 Fox Spinner and Collet Requirement :
1. 70mm Diameter Size Spinner.
2. 5mm or 4mm Shaft Propeller Collet (check your purchased motor shaft to pick the right size propeller collet).
Please watch the following Videos to balance your Propeller and Spinner:
- Youtube Video Part #1.
- Youtube Video Part #2.
- Youtube Video Part #3.

Spar Requirement
OWL MDM-1 Fox uses 2 x “10mm OD – 1000mm Long” and 1 x “12mm OD – 500mm Long” Fiber Carbon Tube as Spar
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Please note that the models have potential risks altough we create our models to our best of knowledge
and belief. We accept no liability for consequential damage and injuries caused by improper use. Be
careful when handling motors, batteries, EDF, propellers, etc. and make sure you play in under safe
environment.
© OWLplane.com. Jl. Anggrek Rosliana VII, Komp. Kijang, Jakarta - Indonesia, [email protected]
© STL les are designed by Dolly Siregar
We believe you will respect and support our work, please do not share the STL files.
Contact Us:
FB - https://www.facebook.com/OWLplanePilot
Instagram - https://www.instagram.com/owlplanepilot
Youtube - https://www.youtube.com/channel/UCdmaSQaqYB1TcjppIqmr1FA
E-mail - [email protected]
AGE ECOMMENDATION 14+
NOT FOR CHILDREN UNDER 14 YEARS.
THIS IS NOT A TOY!
By using our download les, an RC Model Airplane can be
manufactured using a 3D Printer from our Model Design.
By purchasing our Model Design, you are responsible for safe
operation that does not endanger you or others, or that does not
damage property of others.
OWLplane assumes no responsibility for any damage to persons and
property caused by related the usage of our Model Design.
Filaments, printing supplies, hardware or consumables that can not be
used after faulty 3D printing will not be replaced by OWLplane in
any way.
When operating, always keep a safe distance from your model in all
directions to avoid collisions and injuries.
The RC Model Airplane is controlled by a radio signal. Radio signals
can be disturbed from outside without being able to inuence it.
Interference can lead to a temporary loss of control.
Always operate your model on open terrains, far from cars, trafc and
people to minimize risk.
Always follow the instructions and warnings for this product and any
optional accessories (servos, receivers, motors, propellers,
chargers, rechargeable batteries, etc.) carefully.
Keep all chemicals, small parts and electrical components out of the
children reach.
Avoid water contact with all components that are not specially
designed and protected. Moisture can damage the electronics.
Never take an item of the model or accessory in your mouth as this
can lead to severe injuries or even death.
Never operate your model with low batteries in the transmitter or RC
Model Airplane.
Always keep the RC Model Airplane in view and under control.
Always keep the transmitter switched on when the RC Model Airplane
is switched on.
Always remove the battery before disassembling the RC Model
Airplane.
Keep moving parts clean and dry at all times.
Always allow the parts to cool before touching them.
Always remove the battery after use.
Make sure that the Failsafe is properly set before the ight.
Never operate the model with damaged wiring.
Never touch moving parts.