Telemaster SAS

Senior Telemaster SAS Test Flight #1

ATI has been developing a number of flight control system building blocks and we have been testing them on my Senior Telemeaster airframe.  This week I decided to connect them up to create a simple SAS (stability augmentation system.)

Briefly, when flying with an SAS, the pilot is still 100% in manual control over the airplane, however we have inserted a flight computer in between the pilot control inputs and the control surface actuators. ┬áRather than the pilot’s stick commands directly moving the control surfaces, the pilot stick commands are translated to roll and …
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Elevator Gain Tuning

Tuning UAV Autopilots

One of the most challenging aspects of autopilot setup is tuning the gains for a particular airframe. When the gains are tuned poorly, the aircraft my oscillate excessively, it may lag way behind the target pitch angle or roll angle or velocity, it may never reach the target values. Poorly tuned gains could destroy an airframe in a worst case scenario, but often people just live with non-optimal gains that aren’t great but work well enough to get the aircraft around the sky. It’s hard to know what gains to tune and why and a person could …
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Flying

EGN-1 Flight Testing


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img_2637 Ahhh, green grass, blue skies, fair winds, and an R/C airplane …

 

May 21, 2008.

This winter I ripped out the old 4 stroke engine that was broke. That engine has been repaired, but I decided not to put it back in. Instead I decided that this light “stick built” airframe is crying to be electric powered. I bought an E-Flight 46 motor over the winter and installed it. Then when the bank balance rebounded a bit I bought a Castle Creations Phoenix 60 speed controller. Finally, yesterday, I scratched my head and …
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Senior Telemaster

Airframe Todo List

(Sep 4, 2010 edit: I’ve moved way beyond this todo list, we are on our 2nd and 3rd gen autopilot hardware now. The software has been totally revamped. Still, kind of fun to look back to see where we were a few years ago. Never did clean the gummy residue off the load struts though …)

  • Setup a heading hold mode and implement waypoint following.
  • Setup auto-throttle control module.
  • Install secondary “tapped PPM signal” receiver.
  • Install MaxStream radio modem.
  • Low priority: clean gummy sticker residue off the aluminum load struts.

November 16, 2007

Today I logged about …
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Unicorn

UAV Research at the University of Minnesota

August 3, 2007

Today we took a small field trip to do a couple systems tests.

Here is the basic setup with Paw, Troy, and Brian:


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Here is a closup of the Unicorn airframe with all our instrumentation:


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Here are some pictures of the flying area:


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Here are some pictures of the Unicorn in flight:


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Senior Telemaster Early Flights

While rummaging around my hard drive I stumbled on some early footage of our Senior Telemaster flying. This footage includes some of my earliest successful autonomous flight using the original MNAV sensor head (now discontinued.) There isn’t anything especially great about this footage, other than I love the way the Telemaster looks in the air, especially it’s “scale” take offs and landings. These videos date back to sometime in mid-summer 2007.

The following movie includes some take offs, landings, and some early autonomous flight. One thing that is purposely highlighted in this video is an MNAV firmware bug that would …
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Sig Rascal 110 #1 Instrumentation

MicroGear and the Xbow MNAV

March 5, 2007

Paw finalized the RxMux assembly after I verified everything worked.

March 3, 2007

Today I ground tested my RxMux manual override board and everything appeared to work great.

February 20, 2007

Flight testing the MNAV, Stargate, and Maxstream again.


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In our test last November, we had problems with our gps antenna connection. We made an attempt to fix that issue, but have been waiting through about 40 days of brutally cold weather here in MN to find a flyable day. Finally today the weather and our schedules matched …
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Sig Rascal 110 #2 Results

Sig Rascal 110 #2 – UMN UAV Project


IMG_4073 Purchased August 24, 2005.

This is the second Rascal 110 purchased by this project. It comes with a Zenoah G26 gas 2-stroke ignition engine. The engine seems to be a very nice match for the aircraft. With an 18×8 prop, it will idle at about 1800-2000 rpm and tops out at about 7000 rpm. This isn’t quite the 10k rpm that our OS 1.60FX would turn (with the same prop) on our first Rascal, but it is more than enough power for this aircraft.

October 25, 2006.

Pictures from our morning …
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Sig Rascal 110 #1 Rebuild

Sig Rascal 110 #1 – UMN UAV Project

Next steps …

  • Come up with a better solution for securing the tank.
  • Redo top nose cover job?
  • Cut and fit cowl.
  • Purchase replacement windshield (?)

October 20, 2006.

This morning I re-maidened Rascal #1. I had to work through some minorhardware issues, but the structure and rebuild all held together well,and the airplane flew straight and true and as good as it ever has.I’ve very happy with the outcome, and very glad to have this airplaneback on active flying status.

October 19, 2006.

This evening I ran the engine for the …
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Sig Rascal 110 #1 Flying

Sig Rascal 110 #1 – UMN UAV Project


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Project started March, 2005.

I am involved with the University of Minnesota Aero Dept. on a UAV project. My part of the project involves assembling the airframe as well as being the chief test pilot.

June 7, 2005.

Today we flew the Rascal 110 on it’s maiden flight! Winds were about 10-ish out of the SE, gusting to 15+. It was a bit on the windy side and the gusty cross wind was tricky, but we managed.

Posing at the start of the day …


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img_2547 Curt at the controls …
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