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Emax tiny hawk: upgrading the props

7/3/2019

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PictureTinyhawk fitted with the new 4-bladed props
Introduction
The Emax Tinyhawk is a 1s brushless whoop-style quadcopter that has steadily grown on me since I first reviewed it here. It's certainly not the fastest but is probably the most well designed ducted quad available at present. It comes stock with very good 3-bladed emax props that perform well except that lack thrust when running in reverse meaning "turtle mode" does not work. I've installed and reviewed their new 4-bladed props where turtle mode works and how they perform in general.


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Emax Hawk 5 VTX upgrade tip - POwer Supply

3/12/2018

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To those of you that choose to upgrade the vtx in your hawk 5, like I did with the AKK infinite VTX/DVR (in this walkthrough here) I've updated my recommendation for the powersupply. Previsouly I relied on the flight controller's 5v BEC circuit that also powers the receiver and of course the board itself. I've now updated this recommendation to use the VBAT (or VCC) power supply instead assuming of course your VTX can take up to 24V as most modern full-sized VTXs can, including the AKK infinite I installed. This is because the BEC struggles at higher output making the video feed noisy. Over the longer term this is likely to irreversible damage the BEC rendering the flight controller pretty well useless but not before having random failures as a result of the compromised BEC. Picture below is using the power supply from the original VTX - the flight controller's 5V BEC:

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Installing a new VTX in the Emax Hawk 5

10/9/2018

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PictureSneak peak of the finished product
The Emax Hawk 5 is arguably the best bind and fly quadcopter going as I found in my initial review but can also be greatly improved with a few budget modifications as I wrote about in my blog on bang for buck improvements. I do however see a number of people complain about the stock Emax Hawk 5 vtx however mine has been functioning well. That being said, you cannot adjust setting in betaflight OSD via smart audio or tramp telemetry which is a let down on a 2018 quad. In the interest of sharing I've removed the stock VTX and replaced with one of the larger VTXs currently available (the AKK Infinite VTX/DVR) to prove it can be done.

PictureThe VTX I chose for this project is the AKK Infinite which incorportates a DVR into the VTX
The VTX
The VTX I chose is the AKK Infinity DVR VTX. This is very similar to the HGLRC VTX/DVR that was reviewed here. As the name suggests this is a smart audio VTX in 30.5mm VTX with a built in DVR. I chose those for 2 reasons: First it's big. If I can fit this in you can fit anything! Secondly I like the DVR for recording breakup-free footage. For me I like the nimbleness of the Hawk 5 and don't want to weigh it down with a HD Cam. Other key features of the VTX/DVR:
  • DVR Recording in 640x480 (VGA)
  • Output power: 25mW/200mW/600mW/1000mW
  • SmartAudio/VTX Telemetry (configurable through BetaFlight OSD)
  • Input voltage: 7V-26V (i.e. 2s - 6s)
  • MMCX Antenna connector
The AKK Infinite DVR/VTX can be purchased directly from AKK here: https://www.akktek.com/products/vtx/akk-infinite-dvr-vtx.html

Other parts
Just quickly I used the following tools and parts in the instructions below:
  • ​Daniu Side Cutters
  • TS100 soldering iron
  • Heat shrink in a pack
  • m3 standoffs
The install
Please note all the pictures below relate to the install of the AKK Infinite but install should be identical or at least nearly the same for others. I had to remove the buzzer and relocate the receiver for this VTX but depending on the size of the VTX you install you may need to do only one or neither. Follow picture left to right then down. All pictures will enlarge if you click on them.
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1. Remove the Hawk 5 top plate (4 x m2 screws)
2. Screwdriver is pointing at the double sided foam tape that helps hold the vtx to the FC
3. More of the foam tape
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4. Use side cutters (these ones) to snip the 3 pins that connect the VTX to the FC.
5. Once pins are snipped carefully remove vtx which is still stuck to VtX using sticky foam tape
6. Next snip the pins holding the XM+ receiver to the FC 

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