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FlyPurrz GmbH 2020
www.FlyPurrz.de
Manual Purrz.75
High performance - wing for the ambitious RC and FPV pilot.
Specifications:
Wingspan:
75 cm
Length:
32,5 cm
Height:
15 cm
Wing Area:
6,45 dm²
Takeoff weight: 360 g - 490 g
Empty weight:
180 g ±5%
Aspect Ratio:
8,68
Propeller:
APC 5x7,5E (recommended)
Servos:
maximal 11,5 mm thick
Battery:
40 mm x 40 mm x 90 mm max
Center of gravity: 102 mm from wingtip
Elevator:
+2,5 mm; -1,5 mm
Ailerons:
±5 mm
Important:
-
The Purrz.75 is not a beginner FPV model. Make sure you are an
ace on a styrofoam airplane model before you fly this fast wing
for the first time.
-
The heat resistance of the Purrz.75 is 60°C.
-
Make sure all the components are tightly secured inside the
Fuselage (we use velcro tape).
Remember: A bungee start can produce as much as 10 G!
Anything moving around is changing the center of gravity.
-
Back in the days they said: “flying means landing safely“.
So know your landing strip.
-
We recommend for the bungee start a start position of the
elevator of 1 mm to 1,5 mm up. In total make sure you will never
exceed 2,5 mm elevator up (from neutral position) otherwise u
might stall the Purrz.75.
Attach the hook to the Purrz.75 – did you put it in the right hole?
Hold the aircraft firmly at the frame right at the motor mount,
wings parallel to the ground. Then walk away backwards from the
stake approx. 10 meters. Now you are standing approx. 33m away
from the stake. Start in the direction of the wind if there is any. Now you are ready for take off. Hold the tension
(approx. 35 Newton) and swing the aircraft up and down in a big motion (2’ up and 2’ down) a few times. Let go while in an
upward swing and after release from the hook floor it. Have fun!!! (Check out our starts on www.flypurrz.de).
Don’t
shorten the bungee kit because this will make it really hard to start.
Recommended setup for speed:
Motor:
2208 - 2306 (2300 kV)
Battery:
4s LiPo (900 mAh, min. 80C)
ESC:
45 A
Top speed: 280 km/h (APC 5x7,5E)
Recommended setup for long range:
Motor:
1407 (2800 kV)
Battery:
2s Li-Ion 18650
(constant current ~ 10 Ampere)
ESC:
20 A
Top speed: 150 km/h (APC 5x7,5E)
Recommended setup for light weight:
Motor:
1507 (3800 kV)
Battery:
2s LiPo (1300 mAh)
ESC:
25 A
Top speed: 220 km/h (APC 5x7,5E)
Includes
Purrz.75 Wing with linkage for Elevons and cutouts for
Servos
Servocovers in matching colour
Body with cutouts for motor mount and for a FPV camera
Aluminum motor mount
Sturdy cardboard box for shipping and storage
FPV camera mount (fits a 19 mm camera – not included)
Bungee kit (all you need is a ground stake)
20 cm of steel servo wire, 1mm diameter (18 gauge)
2 x APC 5x7,5E Propeller
3d printed Elevon gauge
3d printed RC and FPV electronics carrier
6 flat head screws M4 x 16, black nylon
16 flat head screws M3 x 10, black nylon
instruction manual
Center of Gravity
Open here for VTX
Open hole to 17 mm max. After
installing the 5.8 Ghz Antenna
close the opening flush to the
surface with a oiece of smooth
tape.
Aileron and elevator up
Aileron
Elevator up
Neutral
Elevator down
Aileron
Aileron and elevator down
3d printed elevon gauge
Hold the gauge in a 90 degree angle
to the hinge. Check the appropriate
position
The elevon gauge is put together
from 3 parts. Push the gauge onto
the thickest part of the elevons.
Make sure the
gauge is fitted
snugly where it
touches the wing
