3D Robotics Comment by Chris Anderson on September 8, 2010 at 7:26am

Great to hear it, and thanks for sharing that. Looking forward to the issue report. Please mention what serial monitor you were using to capture the data (Arduino 19, 18 or something else), and what the error was.

Comment by Rana on September 8, 2010 at 7:43am

Dear Magnus, it is really great to hear from you on your first succesfull test flight with Easystar !"The plane flew the course without any real problems and then started to loiter above the home position. One strange thing i noticed was that the plane changed direction during loiter after a few turns. Could it be that at first it tried to reach home position but never came close enough and then when it reached home it started circling in the other direction?"

To be frankly speaking, the plane should continue to loiter at the home and should not change direction.
There could be a possible scope for improvement in the f/w.

Comment by f8 on September 8, 2010 at 7:45am

Hi,
I have Aerocom 896 too but my can work on maximum 57600 baudrate. APM telemetry works on 115200 speed, can I change serial baudrates and APM will work with standard AP GCS?
If yes how to do that?

Admin Comment by Thomas J Coyle III on September 8, 2010 at 7:45am

Magnus,

When you say "Stabilization worked great with standard settings.", do you mean the PID values that were developed for the EZ* or have you modified the PID settings for the Twinstar II?

I have a Twinstar II with brushless outrunners that I plan to use to try out the APM/Mega Shield combination.

Regards,
TCIII

Comment by Rana on September 8, 2010 at 7:47am

And I am sure Doug & Jason would see to it soon.!

Developer Comment by Doug Weibel on September 8, 2010 at 9:49am

Can you please describe the "changed directions during loiter"? Did it happen more than once??

It is normal for it to change direction once if it is homing on the location and enters in a counterclockwise fashion. Loiter is set up to always go clockwise, so once it switches from homing to loitering it will reverse direction to go clockwise.

Comment by Magnus on September 8, 2010 at 11:53am

@Doug,
It did exactly what you are describing. First some ccw turns then waggled a little and then started to circle clockwise. As i remember it the plane banked more during loitering (cw) than when trying to catch the waypoint. I set up max bank angle during navigation to 35 degrees.

/Magnus

Developer Comment by Michael Smith on September 8, 2010 at 2:15pm

@Magnus,

Would you be able to share a few pictures of your TSII install? I built one up as well, but had a few issues and had to shelve it in favour of Old Faithful (EZ*). Would love to learn from your experiences there (and maybe get myself motivated to finish mine).

Comment by Magnus on September 9, 2010 at 1:35am

Michael,
I'll try to add some photos later today. I have had so little time to spend on this so the documentation is suffering. ;)

In short i have done the following:
* Replaced stock motors with brushless. One ESC in each motor pod.
* Mounted the rudder and elevator servos all the way back (mounted on the fin and on the stabilizer)
* Made the horizontal stabilizer removable so the plane would fit in a the box it came in
* Opened up larger holes between the different compartments in the fusaelage. This way i could place the radio modems in the compartment behind the wing.
* Receiver is placed under the wing
* i have two three cell Lipo packs after each other in the bottom.
* I cut out foam in the canopy so its hollow
* I cut out some foam from the main compartment (under the canopy) so i could place the APM above the batteries. The APM is fastened to a piece of balsa fastened to the plane with velcro. this way its easy to remove it if you like. (And when you want to remove the batteries)
* GPS is placed in the canopy. antenna sticking up.
* Pitot tubes are in the nose but placed high so they don't stick out that much.
* Canopy is held in place by magnets and a piece of plywood.

/Magnus

Comment by Jim on September 17, 2010 at 2:36am

It's great to see your twinstar photos, that a really cool idea to mount the servos in the tail surfaces, I'd love to see some more close ups of that. Is your elevator surface not glued into the fuse? If not how do you secure it during flight?
Jim

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