Thickdile 7 inch FlatTop LongRange

By JoeShu on Mar 27, 2021

4  461  1

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This is my 1st proper 7 inch build that is not using parts that I savaged from crashed quads.
So I think this should be my No-Compomise build, and spend a fortune on the parts, but it turns out I made a big compomise on weight........

OK, first off, I want a frame with plenty of space for extral-large battery and FC components
So i pick the Crocodile 7, the battery bay is big enough to hold stuff as long as 140mm, but one thing I missed is this frame had resonance oscillation problems with heavy motor.
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To lift the bigger battery I choosed the Emax Eco II 2807 motor. Yeah, they feel heavy just by themselves.
It's 7-Inch,Why not make it long-range? So I orderd parts based on my understanding of how long-range flight......
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Since I perfer using INAV as the FC firmware,I used the BN-880GPS, designed a TPU parts to hold the bigger GPS
And a custom Gopro mount to clear space for the battery bay.
After 3 hours of hard work, All the stuff are shuffled into the quad.
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Yes, I finally realized that this thing is too heavy....
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I don't want to change any major part of this quad, So the only way out is to remove the gopro and get a 4K hybrid cam
To solve the oscillation problem, I added 2 carbon filber plate to connect the front arm to the back ones.
And to make use the gyroflow, I added a secondary FC just to log the gyro info.
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Well, one thing left is to get a good sunny day and maiden this thick boi
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Update:
2021-04-02:
Caddx Tarsier seems to have overheating issue, the FPV feed have a small chance to turn all white after the quad powered on for a few min. Currently only had one case of FPV cut in hovering. I may have to replace this CAM.
2021-04-02:
Spot some noise in FPV feed, changed the wire to get Cam powered from secondary FC. Reduced some of the noise. Hopefully this can reduce the chance of FPV Feed Cut.

Photos

Part List

Frame

GEP-LC7HD Frame - GEPRC (2 builds)
Geprc.com
$59.99

Flight Controller

Matek F722 Mini SE 20x20 Flight Controller (13 builds)
Pyrodrone.com
$59.99

ESCs

T-Motor P50A 3-6S BLHeli_32 4-in-1 ESC - 30x30mm (6 builds)
Pyrodrone.com
$66.90

Motors

4 x EMAX ECO II Series 2807 Motor (1300KV/1500KV/1700KV) (8 builds)
Getfpv.com
See Site

Propellers

2 Pairs DALPROP CYCLONE T7056C 7inch Crystal 3-blade Propeller for RC FPV Racing Drone (17 builds)
Banggood.com
$4.16

FPV Camera

Caddx Analog FPV&HD Recording Camera Tarsier V2 (63 builds)
Caddxfpv.com
$69.90

FPV Transmitter

RUSHFPV Tank Solo 25-1000mW+ 5.8GHz VTX - MMCX (25 builds)
Racedayquads.com
$55.99

Antenna

1PC HGLRC Long Range Hammer Mini RHCP/LHCP 5.8G 2.5dBi Super Mini FPV Antenna For FPV Racing RC Drone (6 builds)
Banggood.com
$8.99

Receiver

TBS Crossfire Diversity Nano Rx - FPV LONG RANGE DRONE RECEIVER (97 builds)
Team-blacksheep.com
$49.95

Batteries

2 x ZOHD Lionpack Max 21700 4S1P 5000mAh 14.8V Li-ion Battery
Getfpv.com
$119.98

Radio

RadioMaster TX16S Multi-Protocol RF Module OpenTX 2.4GHz RC Transmitter w/ V3 Hall Gimbals (96 builds)
Racedayquads.com
$199.99

Goggles

DJI FPV Goggles HD Digital 5.8Ghz 1440*810 720p/120fps Low Latency with DVR Compatible With Caddx Vista for FPV Racing Drone RC (145 builds)
Banggood.com
$534.29

HD Camera

GoPro Hero5 Black — Waterproof Digital Action Camera for Travel with Touch Screen 4K HD Video 12MP Photos (8 builds)
Amazon.com
$405.99

Radio Module

TBS Crossfire Micro TX V2 (154 builds)
Team-blacksheep.com
$69.95

Battery Charger

HOTA P6 DC 600W 15AX2 DC Dual Channel Smart Charger with Mobile Service Charging for Lipo LiIon NiMH Battery
Banggood.com
$83.99
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Discussion

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upioneer   Apr 02, 2021  
1

super clean build. i like the tpu!

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