Techwing low and slow

I wanted to share some test flight video.

It was equipped with a 5000 mah 3 cell lipo. a 1100 kv 350 watt motor spinning a 9*7 prop. I did a 20 minute flight and burned 1007 ma.

As you can see from the video it is extremely stable while flying slow, even with a fairly large battery on board. I could have easily flown for an hour and a half with that battery.

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I am making available 6 ready to fly alpha units to interested parties. $350 on the hobbyuav store. The units include a fully assembled techwing with motor, ESC and servos installed.

Thank you for your support

The techstation

After years of flying UAVs in many different conditions. I have come to one conclusion. Laptops are no good for using as a ground station. #1 problem? sunglare.

even in non direct sunlight, most laptops are hard to see.

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problem solves with a screen from Pixel Qi

 

 

 

 

 

 

 

 

The techstation features a 10.1 inch display from Pixel Qi.  What makes it so special is that it changes from a bright, normal LCD display to a reflective, E-paper like grayscale display, like above, that actually becomes more visible with ambient light. I Combined the screen with a Gigabyte GA-E350n  motherboard. for on ly ~$75 you get a motherboard and embedded AMD E-350D APU with Radeon HD 6310 graphics.  Together with 8 GB ram and a 120 GB SSD, There is plenty of power to run mission planner and a USB video frame grabber. All while only drawing about 2.5 amps@ 12v.

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It has more than enough power to run mission planner and record video through a USB capture device

 

 

 

 

 

 

 

 

 

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The power supply is The M-4ATX from mini-box . It accepts  power from any unregulated 30-6 V dc source. It also provides reverse current and over voltage protection.

 

 

 

 

 

 

 

Screen and driver from Adafruit

For a complete screen solution I used the screen and LVDS driver combo from Adafruit. The driver board gets power from the 12v accessory line coming from the M-4ATX so it is protected as well.
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You can access different inputs to the screen here. It even has a direct RCA jack for video display.

 

 

 

 

 

 

 

 

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You can even tell your significant other it is a new media center for the family. It streams 1080p movies!

 

 

 

 

 

 

 

 

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running minecraft @ 20FPS and ~2.5 amps 12v


If that fails just say ” I got it for the kids “.

techpod summer sale and new parts shipping with kits.

Techpod kits are going on sale from today until july 31st They will be available for $140 to all US and Canadian customers.

techpos sale_edited-1

 

 

 

 

 

 

 

 

 

 

 

 

All newly shipped techpod kits will be shipped with these great upgrade parts which make the tail and wing very easy to remove and transport.

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For those of you who already own a techpod and want to purchase the upgrade kits, they are available separately here. Techpod upgrades.

 

techwing01

The techwings small size and rugged swept flying  wing design naturally lead to some design challenges. Good low speed handling can be very difficult to achieve. this has a lot to do with the low aspect ratio and swept wing, leading to a large wing tip vortex as pictured here

tip-vortex

wingtip vortex

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wing tip added

Another problem that flying wings suffer from is the low CL max, Around 0.75. this is due to the need for reflex at the tail of the airfoil. the trailing edge of a flying wing general needs to produce down force. In a normal airfoil this wing area can be used for lift instead. I use a fixed leading edge slot in order to drastically improve the stall speeds and low speed handling as well as improve aileron responsiveness.

MH-49slot_alpha  in this Java foil analysis, CL max is estimated to be around 1.3 much higher then the 0.7 Cl max of the unmodified foil. Stall is pushed to around 17 degrees as apposed to around 13. I also added real wingtips to control the vortex, reduce drag and to improve stalls and mostly eliminate tip stalls.

 

 

 

 

techwing01

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tool-less wings and removable tail

Hey everyone,

I wanted to share the work I have been doing on making the wings very easy to install and remove and making the tail removable.

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The files are available on grabcad if you would like to print them yourself or they are available on the IMG_0802IMG_0799store.IMG_0798

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Techpod update: new mods available soon

hey everyone,

So, I have been working on a few upgrade modifications that will be available in about a week.

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IMG_0800

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removable tail

 

 

working belly/camera bay doors

camera bay doors ISO

camera bay doors ISO

camera bay doors bottom

camera bay doors bottom

camera bay doors

camera bay doors

 

 

Plug and play, tool-less wings. No more dealing with pluging in servo wires and hunting for a screw driver. there will mating plywood plates and  6 pin connectors it will look something like this:

this is the present state of the upgrade prototype.

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it has a large diameter CF tube that the wing tube slide into. simply slide it on and the electrical connections are made and a clip holds it all in place………….

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I also have installed in this model another upgrade. G10 plywood replacement. It will help the techpod take much more abuse on hard landings. 20140124_195712

OpenFoam

Hey guys,

I wanted to share my thoughts about the open source FEA/CFD package, openFoam. I have been using it as part of the free linux distribution, CAElinux 2013. I have been playing around with some of the tutorials for the past few weeks. Very interesting and cool.

motorcycle

 

After familiarizing myself with the file structure and procedures I was able to come up with this after adapting the motorBike tutorial to my needs.

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openFoam is extremely powerful and flexible in its abilities, however it has a very steep learning curve. I still have a lot to perfect before I can start generating accurate performance predictions, but it is pure joy using such a open and free CFD solution.

Showcase : HD FPV on a 50 min flight time Quad with a Linux FC

Hey Guys,

I’m Kabir, a friend of Wayne’s. I’m 15 and am form Kolkata,India. I would like to showcase my latest project here 😉

The Copter :

The copter is a large one of my own design made from lightweight CF rods, equipped with a brushless gimbal. I am using very efficient low-kV pancake motors and large (17” props) with Panasonic NCR18650B cells in a 4S5P configuration. My target AUW is 2kg.

 

The Lynxpilot Flight Controller:

The quadcopter runs on a hybrid linux flight controller called LynxPilot, which I’ve designed myself. I had been experimenting for many days with a pcDuino , a 1GHz board with an ARM SoC which worked great for my purposes. But with it came the problems of running timing-intensive operations on Linux. Due to the non-realtime nature of Linux this was especially problematic. To work around this I patched the ‘linux-sunxi’ kernel sources with a RT-PREEMPT patch and got the realtime kernel running on my board. This took a long time since the kernel sources were hardly documented and also obsolete to some extent.

The software running on the board was my next consideration , since I couldn’t decide whether to port AP_HAL over to it or write my very own. In the end I decided to write my own. Now, I already had a spare APM 2.5 and i thought, why not use it as a slave for a robust autopilot system. I went ahead on this angle and ended up with running the computationally intensive algorithms (EKF , etc.) on the pcDuino while using the APM to get raw sensor data and R/C inputs and shoot it over a UART to the pcDuino. I was inspired by El Gallinazo’s work (http://gallinazo.flightgear.org/) to do this.

I had decided to use the APM for controlling the ESCs too, but I got some AfroESCs which are awesome and allow me to use i2c to control the motors. I ported a firmware patch (https://github.com/balrog-kun/tgy) to the latest version of SimonK which allows me to use the ESCs to get motor RPM feedback back to the flight controller allowing for major improvements in stability. My code is yet to implement this as of now as I still haven’t tested the firmware on the Afros (ordered some from HK). I presently use a very limited set of Mavlink parameters for telemetry, but will expand this in the future. Telemetry will be run via the same radio as below – the Ubiquiti Rocket M5

High Definition FPV:

I’ve been successful in streaming low-latency video over my wifi network using a crappy webcam and the pcDuino, so I decided to expand the same system for the downlink as it had worked well for me. I’m using the below equipment for the high-definition link.

2 x Ubiquiti Rocket M5’s – Air side one will be decased and carrying 2x cloverleaf antennas [lighter that a Bullet with a heavy N-Type connector at 85 grams]

1 x Logitech C920 webcam – has hardware H.264 encoding which means the pcDuino can just route packets without any computation required for encoding the video stream.

Current status of the project is that I’m waiting for the motors props and ESCs to arrive. I still don’t have the funds required to buy the Ubiquiti Rocket M5 pair and the 20 NCR18650B cells. If you would like to help me out with any contribution ($ , parts, or otherwise) you can email me at mhkabir98@gmail.com

THANKS FOR READING!!

Kabir

 

Camera bay doors

Hey everyone,
I have been working on a system for working bay doors for the camera bay located in the belly of the techpod. This is what I came up with.

camera bay doors

camera bay doors top view

camera bay doors ISO

camera bay doors ISO

camera bay doors bottom

camera bay doors bottom

I 3D printed It with a replicator dual by makerbot using black and white ABS plastic. The actuator is a retract servo so it uses no power while in the up or down positions. Here is a couple videos of it installed into a techpod.

kits will be available in about 2 weeks after some rigorous testing

My first blog

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Hi there everybody,

I am Gabriel Garris head assembler of ready to fly techpods and son of Wayne Garris, creator of the techpod and founder of Hobby UAV. Im writing this today because i want to extend mt gratitude to all of our customers for help making this all possible and I would love to have some feedback from you guys and also feel free to ask me any questions as i will be here for customer service. I will also be keeping you guys updated on upcoming new products such as a composite upgrade kit and the all new Tech Wing. So yeah I’m extremely excited to be talking to you guys and cant wait to hear back. Thanks for reading.