Hi,

as I understand, circle is supposed to be like loiter, just without GPS. Last weekend, I was out testing and switched my APM into cirlce mode (with the R/C) and nothing happened. The Bixler 2 just flew straight. At this time, no GPS was installed to the APM which is running Arduplane 2.7.

Am I missing something? Shouldn't the plane have started circling?

Then about loiter: I suppose, when I switch the mode to loiter via the R/C, the radius is WP_LOITER_RAD, right? Or is there a different setting? How about the altitude? Does it loiter at the altitude where it was when I activated altitude (aka ALT HOLD) or does it go to any preconfigured altitude? Same question goes for circle...

-Stefan

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I'm not an arduplane expert but i think that both circle and loiter on arduplane will default to attempting to hold the current altitude.

I would have expected the plane to start circling instead of just going straight...

I would have expected the plane to start circling instead of just going straight...

Mee too :D. AFter I got my plane back from the city's groundskeeper, I triple-checked the APM settings and if the R/C triggers circle and everything works fine.

I use a 9X with the 6pos switch mod.

My first reasonably successful flight, btw. Before, the plane always crashed after a few secs, until I finally had the APM setup figured out :).

Nice video... With exclusive tree top parking ;-)... Those Finnish trees. Hope you got it down easy enough?

Nope, it staked itself with a branch. No way shaking it loose. But fortunately, we have a lot of trees over here and the city's groundskeeper had a heart for newbie pilots and a chainsaw :).

Hey! Any chance that you can enlighten us what parameters you figured out that caused your crash? Was it more than just connecting the GPS? Im about to launch my APM 2.5 plane pretty soon and I need to triple check my setup! :)

Are you talking about my initial crashes in the first flights? That were classic newbie mistakes.

- inverted servos which shouldn't be inverted or vice versa

  => When dry testing REALLY explain to yourself, which aileron deflection has which effect

- Badly wrong CG

The reason for the "tree parking" was the "human parameter"... Pedestrian walking by and starting to ask me questions and me consequently not focusing on where the plane goes.

>- inverted servos which shouldn't be inverted or vice versa

Being new to R/C that one almost caught me out. Was thinking elevator goes up, plane goes up, therefore aileron goes up, wing goes up (and aileron down, that wing side down). But it doesn't work like since aileron or elevator down gives more lift over larger curved surface then goes up. The elevator actually loses lift and drops and points the plane upwards to go up. Easy when you know ;-)

Yeah, tell me about it... :D

That caused my first crash - which is VERY embarrassing because I do have notable full size aviation experience... ^^

Hehe, ok! The rudder seems to be ok but you can never be sure, Ill have to test the stabilize reaction and not just the radio. Thanks!

At this time, no GPS was installed to the APM which is running Arduplane 2.7.

I'm confused now, surely without a GPS installed the plane does not have any navigational data, so how can it circle?

You are mixing up LOITER and CIRCLE. LOITER is circling around a GPS point. CIRCLE is just stabilised circling, i.e. e.g. wind can move the plane off the initial center point.

Thanks Stefan, I didn't know that.

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