Mark Whitehorn
  • Male
  • Denver, CO
  • United States
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Latest Activity

Mark Whitehorn commented on Nick Arsov's blog post AUAV-X1 - Part IV - some AUAV-X1 board pictures and TPS63061 scopes at different voltages and loads
"Nick, those pictures are very nice. Two comments on the front view: 1) the color used for SIPI doesn't show up well on my screen 2) are "additional channels" PWM inputs? thanks, Mark"
Apr 13
Mark Whitehorn commented on Mark Whitehorn's blog post Razor 9DOF HP filter removal (original 16MHz version)
"The board I modified was purchased in January 2010, but has no date marking. Later boards which do not need modification shouldn't have R5,R8,R16 installed. Modified boards will also have shunts (zero ohm resistors) installed in the capacitor…"
Nov 15, 2010
Logan Greenlee commented on Mark Whitehorn's blog post Razor 9DOF HP filter removal (original 16MHz version)
"Does anyone know if this is required for the boards marked 12/28/09?"
Nov 15, 2010
Mark Whitehorn commented on Mark Whitehorn's video
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"Thanks Nathaniel, I realized after shooting this video that you can see the aileron control horn; not only can you tell how bumpy the air is from the wing flexing, but, as Curt Olson recently mentioned, you can tell what the control surface is…"
Aug 17, 2010
Mark Whitehorn commented on Mark Whitehorn's blog post ArduPilot 2.6 + ArduIMU V2 in Telemaster Electro
"Thanks for the compliments. Two 10 minute flights today with solid performance in stabilize and FBWA modes. GPS tracks look good when the SUP500 is locked (no fix for entire second half of first flight), but groundspeed still seems erratic. Airspeed…"
Aug 17, 2010

Moderator
Nathaniel Caner commented on Mark Whitehorn's video
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"Mark, Nice camera angle, I'll have to try that one! I bet the wind really gets ripping on those open plains! Not much to stop them out there. At least you don't have to worry about losing it to a tree :) Nathaniel"
Aug 17, 2010
Mark Whitehorn posted a video
Aug 14, 2010
Mark Whitehorn replied to Jeremy's discussion Question about pitot tube placement
"My 6' Telemaster has the pitot tube about 23" out on the wing (tubing routed through aileron servo bay) and projecting only 1 3/4" beyond the leading edge. Airspeed readings seem to be fairly accurate. My prop radius is 6.5" so I…"
Aug 13, 2010

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Mark Whitehorn's Blog

ArduPilot 2.6 + ArduIMU V2 in Telemaster Electro

Posted on August 7, 2010 at 8:30am 11 Comments



  • Modified ArduPilot2.6 and ArduIMU to do interprocessor communications via TWI to free up USART for full-duplex serial comm's between ArduPilot and GCS; can upload PID coefficients in flight. IPC code example:…
Continue

Razor 9DOF HP filter removal (original 16MHz version)

Posted on February 15, 2010 at 8:00pm 7 Comments

For those with the 16HMz AT328P version of the SparkFun Razor9DOF board who also want to run the DCM based AHRS code, this may be of interest.

First read Jordi's post for the ArduIMU and Razor6DOF boards:


To remove the 3 highpass filters from the… Continue

Comment Wall (5 comments)

At 4:35pm on February 21, 2010,
Developer
Mark Colwell
said…
Ventus HCX is a 2.6 meter glider from NirtroPlanes with custom revisions, It has a large fiberglass fuselage for equipment, but a low wing area that demands high speed, it also it tends to tip stall. I added flaps and extended the entire trailing edge to increase area and maybe slow it down. This UAV will get a MegaPilot to control flaps, ailerons, elevator & rudder and enable crow air brake mode. I did not install crappy factory plastic brakes. Need to mount Monster Power 25, 35-48 870kv motor in nose, controlled with Phoenix 45 Hv speed control feed by ThunderPower 18.5v 5s 3700mha lipo, Rudder needs custom control horn installed, rest of push-pull system is installed with control lines routed through micro tubing around equipment bay. I extended trailing edges of rudder and elevator also, I will use a AR7000 rx with DX-7 tx, Xbee 900 pro for tm downlink, Webbie HD with video out feed to Renzibi OSD sent to 500mw 910mhz downlink tx. This is a one crash machine so I will really take my time to get it right. I hate to crash...

Stryker_II has a ArduPilot w/368, AirSpeed Shield v1 with pilto , ArduIMU v1, xBee 900Pro tm downlink, JR XP7202 tx, 790U rx, HiMax 32-48 3800kva motor, 6x4 speed prop, 50A BP Generic ESC, ThunderPower 2250 mha lipo, Phoenix 10a BEC, 2 Cheap metal gear servos from E-Sky, chloroplast fins, balsa 1-1/4 Elevons, 1/4 x 3/8 spruce spine and extra 1/4 glass rod across entire wing just in front of servos. Black duct tape Glass tape, H2O spray paint.. All up weight 32.5 oz

At 5:17pm on February 21, 2010,
Moderator
Morli
said…
hi Mark,
I will be very interested in your experince with AP in Ventus which I have been droolling over for some time now. This one is in offer from some asian sites at un believable price where shipping it would cost more for me than the model it self but I love the sleek look of it. I will have more questions as down the road if you would like to share your experince and photos. thanks
At 7:11pm on February 23, 2010,
Developer
Mark Colwell
said…
I'm using 910 mhz @ 500mw with Yagi +9 db on rx, and have a 2.4 ghz @ 100mw for use with 72 mhz RC, but may try 5.8 ghz or 1.2 ghz later, I will need to get my FCC Technician Lic
At 2:35am on February 24, 2010,
Developer
Mark Colwell
said…
I have only done short range tests, but 910 mhz looks better.
At 2:19pm on August 7, 2010,
Moderator
Nathaniel Caner
said…
Mark,

Thanks for the invite! I finally received my Senior Telemaster UPS yesterday!! Hopefully I'll be airborne by next weekend. It's a good thing I've been doing this so long, the instructions with this ARF look like a kindergartner wrote them! The pictures are too small to be of any use, for a design that has been in production for over 40 years they need to revisit their instructions! I'll post some pictures soon and maybe a blog post of the build and Ardupilot installation. See ya around the forum.

Nathaniel

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