Sky Viper v2450 GPS Target Clearance $53 -also on Amazon

MinneSconsin · July 14, 2018, 9:42pm

This raises a new question, for me: How to copy parameters to new SV? Is there a file via webserver app? Could just set parameters on the new SV by hand but that’s not complicated enough. These topics are helpful. But is there a tutorial?

https://discuss.ardupilot.org/t/mission-planner-use-with-2-tricopters-and-one-quad/2784/6

https://discuss.ardupilot.org/t/copying-parameters-to-new-autopilot/15580/2

jgn49 · July 16, 2018, 5:19am

Just saw that Amazon.com also has the v2450 GPS for $53. Crazy that it costs less than the non-GPS version. My son actually wants the regular v2450 b/c of the 1-touch stunts.
http://a.co/jlbB3J7

lordneeko · July 16, 2018, 11:58am

The 2450 can do stunts as well. You just have to set a button to it. Also, it’s a good idea to adjust the parameters since they weren’t setup for stunts. You can do all this on the APWeb Flight parameters page.

If you don’t change the parameters then you need to ensure you have at LEAST 100 ft before pressing the buttons. The default values are not very fast. I recommend changing these before attempting. But it does work. Conversly, if you get even better, you can start to play with the ACRO parameters and can actually fly as flip. That’s a lot more fun!..and nerve racking lol.

Here are some parameters to change.

flip params

FLIP_RAMP_CD 500
FLIP_RAMP_MS 350
FLIP_ROT_RATE 3000
FLIP_ACCEL_MAX 3000

Here are the explanations for each parameter

github.com

SkyRocketToys/ardupilot/blob/f5fd098c161f4ac1507ba90e9ad644a5b095ebb0/ArduCopter/mode_flip.cpp#L42


// FIXME? these should be instance variables?
FlipState flip_state;               // current state of flip
control_mode_t   flip_orig_control_mode;   // flight mode when flip was initated
uint32_t  flip_start_time;          // time since flip began
int8_t    flip_roll_dir;            // roll direction (-1 = roll left, 1 = roll right)
int8_t    flip_pitch_dir;           // pitch direction (-1 = pitch forward, 1 = pitch back)


/*
 flip parameters
*/    
const AP_Param::GroupInfo Copter::ModeFlip::var_info[] = {
   // @Param: RAMP_MS
   // @DisplayName: Flip ramp time
   // @Description: Ramp time in milliseconds at the start of a flip. This allows you to adjust for height loss in flip
   // @Units: ms
   // @Range: 100 2000
   // @Increment: 10
   // @User: Advanced
   AP_GROUPINFO("RAMP_MS", 1, ModeFlip, ramp_ms, 1000),


   // @Param: RAMP_CD

Always, be ready to press the power button to cut the motors off in case of a crash, to save your motors. Other than that, you probably can’t hurt the SV2450 too much. have fun!

jgn49 · July 16, 2018, 6:40pm

Thanks so much for this info. I had seen this video of someone trying in acro mode, but I don’t think they had changed the flight parameters. I might have to go ahead and order another one from Amazon, as I’ll likely bang up my original one pretty good trying to learn. But I got the $10 credit from Whole Foods as part of the Prime Day promotion, so that’ll bring it down to $43. Hard to pass that up.

jgn49 · July 21, 2018, 2:41am

You’ll have to forgive me b/c I’m still quite new to Ardupilot, but I don’t see the flip parameters anywhere in the flight params. I believe I’m on the latest firmware.

lordneeko · July 21, 2018, 1:28pm

On that flight parameters page there is a drop down at the top. Switch it to All and then use the search field and type FLIP_

They should appear

dkemxr · July 21, 2018, 1:43pm

You can also use Mission Planner for configuration if you are more familiar with that. It’s typically what I use for these purposes.

jgn49 · July 21, 2018, 1:47pm

Yeah, I unfiltered and showed all, but I had no flight parameters beginning
with FLIP.

MinneSconsin · July 21, 2018, 2:27pm

Parameter units for the SV are as noted here, right?

jgn49 · July 21, 2018, 2:43pm

Although I haven’t yet found the specific parameters to tweak the flips, performance in flip mode wasn’t too bad. I’ll mess around with mission planner and see if they appear.

lordneeko · July 21, 2018, 4:02pm

Well not exactly. The FLIP parameters were added by the SV build. I don’t think the wiki has those parameters added.
I’ve been busy all day so I don’t have time to look it up on my SV sorry…they gotta be in there somewhere…

lordneeko · July 22, 2018, 3:47am

Ok my bad. Those flip parameters were added to the new sky vipers. I don’t know which parameters control the flip speed prior to those… Sorry. It might be the acro parameters… @rmackay9? Do you know which parameters affect flip mode?

rmackay9 · July 23, 2018, 3:02am

I guess those flip parameters are, as @lordneeko says, only in the skyviper build so I’m not really aware of what they do. We have a wiki page here which describes the parameters for master/Copter-3.6.

lordneeko · July 23, 2018, 10:57am

Oh ok, did the flip mode not even exist before the SV?

MinneSconsin · July 23, 2018, 3:28pm

Possibly a topic for another thread: Has anyone tried flying multiple SVs at once? After Target slashed the price, I now have three SVs (one with a wonky prop spindle I repaired after a crash…). Also velcroed lights to two of them. Now hoping to fly all together on similar waypoints at stepped altitudes, at dusk. This thread touches on it. Are there others? Voice of experience, anyone? If I learn anything from my attempts I will start a new topic.

lordneeko · July 23, 2018, 3:40pm

There was a mention of it here
https://discuss.ardupilot.org/t/dev-call-june-25-2018-2300-utc/30311/2

Apparently some folks at a conference had a bunch of them swarming.

Also, check out this threat. I just ran across it. I never knew the Sonix had a JSON interface! I’m certain you can use that.

https://discuss.ardupilot.org/t/fun-taking-pictures-with-devconsole/22468/2?u=lordneeko

dkemxr · July 23, 2018, 4:22pm

Flip mode has been in Arducopter for a while (3.2.1 anyway). However there are no parameters to adjust.

MinneSconsin · July 31, 2018, 1:59pm

Target’s price today is $31.79!

dkemxr · July 31, 2018, 2:06pm

If you happen to live near a Target that has one in stock great deal. Not that I want another one but I would have to drive 143 miles to pick one up (no shipping).

jgn49 · July 31, 2018, 2:32pm

Yeah, I’ve been burned once before. Drove like 30 miles looking for something that was supposed to be in stock at Target, only to get there and find out it they didn’t have it -or I was too late.