Crystal garris's Blog (59)

Techwing low and slow

To show just how stable the techwing is while flying slow, I made the following video.


WS: 43 inches

all up weight:37 oz

motor: 370 watt 1100 kv

prop: 9*7

battery: 5000 mah 3s lipo

battery weight:14.8 oz

flight duration: 20  minutes

ma used: 1007

As you can see the techwing handles extremely well…


Added by crystal garris on December 8, 2014 at 11:55pm — 14 Comments

Techwing update and maiden

Hey everyone,

 The newly updated techwing design has achieved its maiden flight.…


Added by crystal garris on September 21, 2014 at 3:25pm — 7 Comments

The Techstation

Hey everyone,

 I have to admit, I am a little fed up with the "ground stations" available on the market today. First off, good luck seeing most laptops or tablets at all outdoors. Second, good luck modifying or repairing your laptop / tablet. It can be done but its usually a major pain with a good chance of breaking something.…


Added by crystal garris on July 30, 2014 at 8:30am — 15 Comments

techwing gets winglets and slots

Hey everyone,

 I wanted to post an update on the work I have been doing on the techwing design.

The new design is scaled up some to a 40 inch WS. It also includes real Grantz type winglets, a longer tip cord and fixed LE slots.

Flat plate:…


Added by crystal garris on July 18, 2014 at 9:49pm — 23 Comments

techpos summer sale July 15-31

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.

wpid-20140714_103052.jpg .…


Added by crystal garris on July 15, 2014 at 10:46am — 30 Comments

Tool-less wings and removable tail mods for the techpod.

Hey everyone!

So I have finally emerged from home built CNC machine purgatory. I finally have the new machine running, and it rapids @ 1000 IPM and gets around +- .003 accuracy. But anyway thats not the point of this post. I have been working on upgrades to the basic techpod. Upgrades that make it much easier to transport and assemble at the…


Added by crystal garris on June 17, 2014 at 10:00am — 3 Comments

Open source Techpod

Hey everyone!

 So this is something I have been wanting to do for a while.

I am ready to pull the trigger…


Added by crystal garris on May 4, 2014 at 12:02pm — 21 Comments

New techpod upgrades on the way.


hey everyone,

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


removable tail:



working belly/camera bay doors:

camera bay doors ISO  ]…


Added by crystal garris on May 2, 2014 at 9:00pm — 7 Comments

Techwing: an openFoam case study

Hey everyone!

 I am really getting a handle on openFoam. I have figured out the scale and mesh resolution problems I have been having. I can now produce highly detailed data sets of the air flowing over the current techwing design.

this is the airflow over the wing tip. Needs improvement. …


Added by crystal garris on May 2, 2014 at 12:37pm — 11 Comments


I wanted to share my experience with openFoam. 

I am using openFoam as part of the free linux distribution CAElinux. CAElinux makes it a snap to get a copy of openFoam up and running. CAElinux also comes with a plethora of open source CAE packages. After going through many of the available tutorials, I can now import my own geometries and run a case. I still have…


Added by crystal garris on April 28, 2014 at 6:46pm — 15 Comments

Camera bay doors coming soon for techpod.

Hello everyone,


I just wanted to show off what I've been working on lately for the techpod. Is a mechanism to at automatic doors to the camera bay of the techpod. This will allow people to mount a camera in the belly of the techpod and gather unobstructed vertical photos and still keep the camera protected during landings…


Added by crystal garris on March 4, 2014 at 6:10pm — 12 Comments

The Techwing maiden flight

Hello everyone!

A few months ago I recieved an email from Lorenz, main developer of the Pixhawk research project and  the PX4 autopilot. He urged me to create a small flying wing platform. Around 35 inch wing span and around 500 grams. capable of carrying a small camera like a gopro or canon and an…


Added by crystal garris on November 24, 2013 at 1:30am — 18 Comments

Magnetic encoder and brushless gimbal controller

- from my blog hobbyuav,com.

For the techpod 2.0, I want to have a high precision camera gimbal capable of continuous rotation in two axis. I have always likes the brushless gimbals that are…


Added by crystal garris on September 15, 2013 at 10:00pm — 9 Comments

170 minute techpod flight

Hey everyone, so I don't have the APM tuned very well but at least its hitting waypoints and holding altitude and airspeed. I decided to get it flying and see just how long it would go. Here it the result:

here are the Tlogs

this is the equipment list:…


Added by crystal garris on July 28, 2013 at 12:30am — 87 Comments

Variable pitch Techpod

Hey everyone, Here is something cool that I have been working on that I think you may enjoy.

Variable pitch prop

So, I had been pondering how to make an inexpensive variable prop. I was thinking about using a heli head from a hk450 or perhaps a tail rotor. I eventually saw a post here, on diydrones, where a guy was using a tail rotor from a HK500 (can't find post). I got inspired and found a HK600 tail rotor has the…


Added by crystal garris on July 3, 2013 at 4:06am — 17 Comments

Techpod + APM 2.5 test flight

Hey everyone,

 Got a little free time to get out to the field and do some flying yesterday. got a chance to engage the APM and see what it would do.

I was able to try out stabilize and RTH modes. both worked pretty well. Had problems with the OSD and after the first flight, I was getting glitches from the right aileron servo. I could not track…


Added by crystal garris on May 20, 2013 at 1:47pm — 7 Comments


hear is what's happening next-

this is…


Added by crystal garris on March 23, 2013 at 8:09am — 33 Comments

Techpod 6 cell 10,000 mah test flight

Went and flew at 60 acres today. only had time for a 20 minute test flight. the camera was out of focus and it was getting dark. This was flown with a foxtech 370 kv motor ,…


Added by crystal garris on March 3, 2013 at 11:30pm — 34 Comments

The Techpods have landed!


 They are here everyone!

That's a lot of techpods. I will start shipping tomorrow. Still have to work so the majority will be shipped Friday and Saturday when I will be having work parties with a few friend coming over for beer and pizza.

Thanks to the diydrones community for helping make this happen.


Added by crystal garris on February 25, 2013 at 3:00pm — 21 Comments

Proposal to merge XFLR5 and PX4

(copied from my blog at

Hey everyone!

I have not found a place where the fixed-wing control for the PX4 is being done so I started this blog.

Above is a Screen shot from XFLR5. I use it to mathematically model the physical form of an airplane. I can then take this description of said plane and then start modeling the flow of air over the surfaces described is the model. You can then send…


Added by crystal garris on February 22, 2013 at 5:00pm — 21 Comments

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