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Revision as of 11:07, 24 April 2018
© Mark Qvale - January, 2018
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| New (tiny) wing! |
Introduction
I decided to try something much smaller in the Wing world. The Z84 is a smaller version of the C1 and FX-61 and I am hoping it flys well as I want to take it backpacking! For flight management/control I'll be starting with an Omnibus F3Pro flight controller to keep it light and simple.
Here then is a collection of my build notes and eventually a flight review of this plane.
General Specifications
Distributor - ReadyMadeRC, USA
Aircraft - Strix Stratosurfer
Build Date - January, 2018
Update - 5 February, 2018
| Airframe Type - | Top Wing FPV Specialist | All-Up Weight - | 59oz (1670g) w/ 4S/7000 Li-ion Pack | |
| Wingspan - | 59 inches (1500mm) | 56oz (1676g) w/ 4S/5200 Li-Poly Pack | ||
| Length - | 39 inches (1000mm) | COG - | 65mm - 70mm @ Wing root (Stock) | |
| Wing Area - | 2.95 ft^2 (27.4dm^2) | Wing Load w/5200mAh/4S - | 19.7 oz/ft^2 (61g/dm^2) | |
| Motor - | Cobra C2217/16-1180kv | Max Continuous Power (4S) - | 360 watts (4S) | |
| Propeller - | 8x7 Aeronaut Cam Carbon Folder | Max Prop Power - | 358 watts @ 2550ft ASL | |
| Static Thrust & Prop Speed - | 1245g & 88mph @ 2550ft ASL | Static Thrust/Weight - | 0.75 | |
| Battery Type - | 4S1P Lipo -or- 4S2P Li-ion | Battery Capacity - | 5200mAh/10C or 7000mah/3C | |
| In flight efficiency - | <135mAh/mile (<84mAh/km) Typ. | Flight Time - | 80 min | |
Components/Flight Gear
Below is the approximate layout of installed components:
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Power Set-up
For power on this build I will start with a Multistar Elite 2204-2300kv motor and a HobbyKing Blue Series 20A with a single Low ESR capacitor added.
- Motor - Multistar Elite 2204-2300kv
- ESC - Blue Series 20A
- Prop - HQ6x4.5
- Battery - Li-ion 3S/3500
Motor Mount
I have designed a 3D printed motor mount which places the motor 10mm rearward of the stock mount. This is to accommodate a standard 22xx motor and standard prop. To use a folding prop I will have to put the motor on an additional 10mm stand-offs.
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| Mount and 2204 motor |
ESC Mount
I decided to design and print a simple mount which glues into the motor mount and bottom of the fuselage. The ESC is held down with a single wire tie and there is a foam pad between the ESC and mount deck.
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| ESC mount |
Flight Control
For initial flight control I chose the Omnibus F3Pro from Banggood. It is an inexpensive and in my experience completely reliable FC. This is the same board I have in the larger C1 Chaser
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- w/iNav 1.8.1
FC Mount
To mount the FC I Glued in some 10mm stand-offs in the bottom of the fuse.
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| Motor, ESC and Flight Controller mounts |
RC Control
For radio gear I am using my standard DragonLink V2 system. I have mounted the RX with integrated DL dipole inside the left verticle stabilizer.
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| DragonLink UHF antenna |
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| RX mount |
GPS Mount
For the GPS I used the same mount as on my C1. This is sized for a Ublox Mini M7 GPS.
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FPV Gear
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- VTx - RMRC 250mw, 1.3G
- FPV Camera - Foxeer Micro with 2.1 lens
- HD Camera - TBA
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| Initial FPV gear |
Airframe Mods and Set-up
Wings
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Fuselage
I made some initial changes based on experience with the C1 and FX's.
The first change was to swap the very flexible fiberglass spar for a slightly larger Carbon Fiber tube spar. THe CF spar is slightly lighter but considerably stiffer. I only had to do a small amount of hot-wire work to fit it in nicely. Of course this means I will have to come up with my own hatch latch (stay tuned)
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| Spar change |
The next "Aero" change I made was to cut down the center fin on top of the hatch and grind away the rear flare around the motor mount top and bottom (not shown). The fin on top just collects damage. The flare around the motor mount makes the prop less efficient and much, much noisier!
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| Initial cut |
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| close-up |
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| Front view |
Kit/Build Review
I opted for the bare bones kit because I live and fly at 2500ft or more altitude and it has been my experience that most PNP setups are underpowered and supplied with servos that could be improved, etc. With that said, all in all this is a really nice kit. The linkage components in mine are well made and sized perfectly.
Here are some of my personal points for improvement:
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Maiden!
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Parting Shot
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| Wait for it! |
Project 3D Print Files
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See Also
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- Thingiverse Design Page
Some of the Vendors I used for this project
Comments? Questions?
