Titan Dynamics Hawk User manual
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Contents
Section 1: Model Information................................................................................................................3
Section 2: Model Specifications & Performance..............................................................................4
2.1: Physical Characteristics...............................................................................................................4
2.2: Aircraft Performance: ..................................................................................................................5
2.2.1: Drag, Efficiency, Power, and Angle of Attack at Varying All-up-weights:.............6
2.2.2: Turn rate, range, endurance, and max climb rate for a variety of different
battery configurations: ................................................................................................................ 10
Section 3: Required Build Materials.................................................................................................. 13
Section 4: 3D printing ........................................................................................................................... 14
4.1: Things to know before you start printing. .......................................................................... 14
4.2: Part Orientation .......................................................................................................................... 15
4.3: Tuning “hole horizontal expansion”....................................................................................... 17
4.4: Bed Adhesion and warping...................................................................................................... 17
Section 5: Assembly of 3D Printed Parts......................................................................................... 19
Section 6: Final Setup & Tuning Tips................................................................................................. 23
Section 7: Additional Images .............................................................................................................. 24
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Section 1: Model Information
The Titan Hawk is a 1m wingspan twin-boom focused on maximizing efficiency. Boasting
a range of 153km with flight time of 2h40m (on its maiden), the Hawk punches well
above its weight. The feel on the sticks is akin to a much larger aircraft with excellent
wind resistance and handling like it’s on rails. The Hawk is cost-effective and simple to
build - requiring only three servos and a single motor. Based on the power and
propulsion system, it can be setup for high-speed aerobatics or ultra-long-range flights.
With the outer wings taken off, it can easily be strapped to a backpack and taken
anywhere you desire. The Hawk is perfect for beginners due to its small size, simplicity,
and quick print time – hitting all the check marks for an ideal all-around flyer. Pan-tilt
support is also included, with support for smaller printers!
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Section 2: Model Specifications & Performance
2.1: Physical Characteristics
General Stats:
• Wingspan: 1021mm
• Wing area: 1690cm2
• Maximum take-off Weight: 1.75kg
• Efficiency: 0.88 Wh/km @ 1.5kg AUW
• Cruise speed: 45-65kph
• Recommended prop diameter: 7-9 inches
Aerodynamic Properties:
• Root airfoil: NACA 3410
• Tip airfoil: NACA 3410
• Root chord: 190mm
• Tip chord: 91mm
• Average chord: 159mm
• Root incidence: 3°
• Tip incidence: 0°
• Aspect ratio: 5.90
• Dihedral: 0°
• Sweep: 2°
Please use the longer fuse2 if printing with regular PLA, as the added tail-weight requires
a longer nose in order to hit CG
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2.2: Aircraft Performance:
Below are some plots showing aircraft performance at different all-up weights.
The
values predicted are not perfect, and values like efficiency can vary greatly based on
the choice of motor and propeller, among many other factors.
These just serve to give
a rough idea of the sort of performance you can expect and give you an idea of the flight
envelope of your aircraft before you fly it and help narrow in on the most efficient cruise
speed. The stall speed assumes a CLmax of 1.3, and the minimum speed line is just 20%
above stall speed. Below the minimum speed, a tailwind gust can cause the aircraft to
stall unexpectedly, so be careful.
Using the drag plot can help figure out how much thrust you’ll need in level flight at a
given speed. This allows for the use of propeller data from companies like APC to choose
the best propeller for the type of flying you want to do.
The plot depicting power required for flight can help you estimate your loiter endurance
at a given speed. If you want the maximum time in the air, fly at the speed which uses the
least power to stay in the air.
The efficiency plot shows you what sort of efficiency to expect at each speed. With it, it’s
possible to choose the best cruise speed for your setup and see how changes in that
speed may affect your efficiency.
The fuselage angle of attack plot shows you what angle of attack the fuselage will be at a
given speed. This can be useful when setting the TRIM_PITCH_CD parameter in Arduplane
to the angle of attack value that corresponds with your cruise speed.
The plots in section 2.2.2 are just to give an idea of the sort of performance that can be
expected for certain battery configurations.
They are not a guarantee of performance
,
as there are too many variable to account for when individuals build the aircraft. Extra
draggy antennas, inefficient motors, print quality, etc. can all change flight performance
drastically.
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