Uploaded May 2015 | Updated September 2026, 10 hours ago
Before this multi-rotor meet, I had never performed a barrel roll or flip on my QAV250. It handles them quite well! John dies at the end.
This is PID Controller 0. Surprisingly, it handles yaw pretty well. I don't really feel the need to retune in PID Controller 1.
Before this multi-rotor meet, I had never performed a barrel roll or flip on my QAV250. It handles them quite well! John dies at the end.
This is PID Controller 0. Surprisingly, it handles yaw pretty well. I don't really feel the need to retune in PID Controller 1.

![1200wh LifePO4 Solar Generator Build - Part 5 - Testing
I bought a 1200wh LifePO4 battery for my solar generator. Watch as I install it step by step.
Part 1 is about draining the battery to 12V: https://youtu.be/kFLFqpB-DAU
Part 2 is about bottom balancing the cells: https://youtu.be/rZGLbAv2MCA
Part 3 is about installing the battery: https://youtu.be/tLQ7TY5xeIs
Part 4 is about charging via solar for the first time: https://youtu.be/dI36N79bnOE
Part 5 (this video) is about testing the amp hour capacity of the battery: https://youtu.be/gMEbXG94vPc
See below for a list of the parts, products, and tools I use in this video.
GBS-LFMP100AHX 12V 100Ah 1.3kWh Lithium Battery: [affiliate] http://amzn.to/2cJFVO5
Midnite Solar Classic 150 Charge Controller 150VDC Input MPPT: [affiliate] http://amzn.to/1XohLIr
Renogy 100 Watts 12 Volts Monocrystalline Solar Panel: [affiliate] http://amzn.to/24PxEqI
Go Power! GP-SW300-12 300-Watt Pure Sine Wave Inverter: [affiliate] http://amzn.to/1UoMROa
Automatic Power Off (APO3), with Anderson Power Pole connectors: [affiliate] http://amzn.to/1tvFXML
Victron BMV-700 Battery Monitor: [affiliate] http://amzn.to/1UMfGCA 1200wh LifePO4 Solar Generator Build - Part 5 - Testing](https://i.ytimg.com/vi/gMEbXG94vPc/mqdefault.jpg)
![GreenWorks Twin Force Mower Review - Part 2 - Sound Comparison and Mow Quality
Part 2 of the Greenworks Twin Force 20 cordless electric mower review. Noise comparison with RoboMow and Gas Mower. How does it mow?
Check out Part 1 for the talk about features and build quality: https://youtu.be/HPoa_zAcZng
Links to products talked about in this video, for your convenience:
GreenWorks Twin Force 20 inch mower (reviewed in this video): [affiliate] http://amzn.to/1OlkAXM
Replacement blades for the Twin Force: [affiliate] http://amzn.to/1TRJRIh
GreenWorks 21 inch metal bodied brushless mower (buyer beware): [affiliate] http://amzn.to/1UWi2kt
Robomow RS612: [affiliate] http://amzn.to/1TRJDkj
How to sharpen a lawn mower blade, if youve never done it before: https://youtu.be/svtRotJBzk4
More info about my portable solar generator: https://youtu.be/zIMFqdpq3Ew
More info about my RoboMow: https://youtu.be/jetsTfSx-hg GreenWorks Twin Force Mower Review - Part 2 - Sound Comparison and Mow Quality](https://i.ytimg.com/vi/gopMP4nXcYA/mqdefault.jpg)



![Vive Tracker mounting ideas
How to mount your Vive Tracker? Lets find out.
Products used in this video:
Arkon GoPro to 1/4 Tripod Adapter: [affiliate] http://amzn.to/2smyC6i
Neewer 1/4 20 screws: [affiliate] http://amzn.to/2tv1Lg1
GoPro QuickClip + Headstrap: [affiliate] http://amzn.to/2t6GaYc
Fotasy Hot Shoe Adapter: [affiliate] http://amzn.to/2tuJYW7
3d printed strap adapter: https://www.thingiverse.com/thing:2213567
Get your HTC Vive today: [affiliate] http://amzn.to/2ugv3yi Vive Tracker mounting ideas](https://i.ytimg.com/vi/hrukLLJd_7U/mqdefault.jpg)

![Milwaukee 3-in-1 Heated Jacket Kit Review
Milwaukee 3-in-1 Heated Jacket Kit Review
Products reviewed in this video:
Milwaukee 3-in-1 Heated Jacket Kit at Home Depot: [affiliate] http://hdmilwaukee3in1heatedjacketkit.createthis.com/
Milwaukee 3-in-1 Heated Jacket Kit at Amazon: [affiliate]
http://amzn.to/2yld5xy
Milwaukee Hoodie M12 12V Lithium-Ion Heated Jacket KIT Front and Back Heat Zones -All Sizes and Colors - Battery and Charger Included - (Large, Black 3-in-1): [affiliate] http://amzn.to/2wSkfbx
Milwaukee 49-24-2301 M12 Heated Jacket 12V DC Plug Adapter: [affiliate] http://amzn.to/2eZg1rJ
Goal Zero Yeti 400 Portable Power Station, 400Wh Battery Powered Generator with 12V, AC and USB Outputs: [affiliate] http://amzn.to/2jiCaSX
(Newer Lithium Yeti) Goal Zero Yeti 400 Lithium Portable Power Station, 428Wh Rechargeable Generator and Backup Power Source with 300 Watt (1200 Watt Surge) AC inverter, USB, 12V Outputs: [affiliate] http://amzn.to/2wS29qb Milwaukee 3-in-1 Heated Jacket Kit Review](https://i.ytimg.com/vi/i7MGuT8FheU/mqdefault.jpg)
![How to Travel by Plane with Photography Gear as an Advanced Hobbyist or Semi Professional
Watch to learn how I travel on planes with my photography equipment as an advanced hobbyist or semi professional. I make a little money here and there, but photography is not my primary income. As such, photography is usually a secondary goal of my trips. I think I have a unique kit and I wanted to share it. More specifically, this video describes my chosen baggage on a ski vacation to Banff in Canada with a secondary goal of photography.
Alternative title: How to take mediocre photos using really expensive equipment ;)
Products used in this video:
Pelican 1620 Case With Foam (Black)
US [affiliate]: https://amzn.to/2WGu3yl
Under Armour Undeniable 3.0 Duffle
US [affiliate]: https://amzn.to/2HUXJ7U
Osprey Packs Farpoint 40 Travel Backpack
US [affiliate]: https://amzn.to/2Vfeai3
Osprey Ultralight Raincover
US [affiliate]: https://amzn.to/2IcDW2K
Gitzo Lightweight Series 2 Traveler Carbon Fiber Tripod with Center Ball Head, Silver & Black (GK2545T-82QDUS)
US [affiliate]: https://amzn.to/2WLZ4kN
Gitzo GM4542 Series-4 Carbon eXact 4-Section Monopod (the monopod I use with my 400mm 2.8)
US [affiliate]: https://amzn.to/2WFz4Ht
Nikon D850 FX-Format Digital SLR Camera Body
US [affiliate]: https://amzn.to/2FP5FDR
Nikon PC-E FX NIKKOR 24mm f/3.5D ED Fixed Zoom Lens for Nikon DSLR Cameras
US [affiliate]: https://amzn.to/2WK01dl
Nikon AF-S FX NIKKOR 85mm f/1.4G Lens with Auto Focus for Nikon DSLR Cameras
US [affiliate]: https://amzn.to/2VftBXw
Arcteryx Mens Beta Ar Jacket ( 2017 version - the one in the video )
US [affiliate]: https://amzn.to/2Ua0AA4
Arcteryx Beta AR Jacket Mens ( updated 2018 version - probably better )
US [affiliate]: https://amzn.to/2WIXAI2
Arcteryx Beta AR Jacket - Womens ( 2017 version - the one my partner wears in the video )
US [affiliate]: https://amzn.to/2YIDak1
Arcteryx Beta AR Jacket Womens ( 2018 version - probably better )
US [affiliate]: https://amzn.to/2WEfVWr
Arcteryx Beta AR Pant Mens
US [affiliate]: https://amzn.to/2VgJSvu
Fenix Power Bundle HP30R 1750 Lumen Spot & Flood Light USB Rechargeable CREE LED Headlamp Plus 4 X Batteries, Charging Cable, and LumenTac Battery Organizer
US [affiliate]: https://amzn.to/2HStxu3
Smith I/O Mag Asian Fit Snow Goggle (CLOUDGREY/CHROMAPOP Sun Green Mirror) - Mens
US [affiliate]: https://amzn.to/2HUiW1B
Backcountry Access BC Link Radio System
US [affiliate]: https://amzn.to/2UnUThw How to Travel by Plane with Photography Gear as an Advanced Hobbyist or Semi Professional](https://i.ytimg.com/vi/ijjAdCYBu3s/mqdefault.jpg)
