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Author Topic: iNAV.....Launch Mode....Default Settings  (Read 437 times)

English Turbines

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iNAV.....Launch Mode....Default Settings
« on: May 02, 2018, 10:09:47 PM »

iNAV.....Launch Mode.....Default Settings

  Having spent quite a few hours now with iNAV and learning how it works, I have recently had to update about 4 Flight Controllers with the latest stable Firmware dated April 2018.
  The last one I did was the Z84 Omnibus F4 and a recent impressive feature I have just started to use is Launch Mode.

Having tweaked it how I like it, I saved all of the Launch Mode parameters from the CLI. This saves a lot of time and enables a safe starting point regarding Auto Launch, and should work with most models.

 I save the lines of code in Windows Wordpad, then just copy and paste into your CLI as and when you need it.

The code below for example, gives a 9 second stabilised climb out at 18 degrees at a power level of approx 90%

Launch Mode Parameter List..:


set nav_fw_launch_velocity = 300
set nav_fw_launch_accel = 1500
set nav_fw_launch_max_angle = 30
set nav_fw_launch_detect_time = 10
set nav_fw_launch_thr = 1800
set nav_fw_launch_idle_thr = 1000
set nav_fw_launch_motor_delay = 100
set nav_fw_launch_spinup_time = 50
set nav_fw_launch_min_time = 0
set nav_fw_launch_timeout = 9000
set nav_fw_launch_max_altitude = 0
set nav_fw_launch_climb_angle = 18



 How to Launch:


1) Power your Transmitter.....Power up the model and wait for a Sat fix.

2) Select Launch Mode using a dedicated Channel.

3) Arm the Controller.

4) Set the level of throttle you want after Launch times out, and also the Mode you would like. Do not move any of the other flight controls or Launch Mode will abort.

5) At this point, note, the motor will not be running, a good indication its in Launch Mode.

6) Throw the model, stand back and watch the next 9 seconds...lol.

 7) Disengage Launch Mode (I have Amber telling me every 5 seconds Im in Launch, so I dont forget)

   Note:
            You can enable Launch Mode permanently if you want, but in the event of a re-boot mid flight, it requires some throttle juggling when you want to re-arm it. Not sure why it would re-boot mid flight, its not happened to me yet.
  Dirty power supply to the FC might do it maybe..?



                                                                                               :vulture:








« Last Edit: May 04, 2018, 04:47:20 PM by English Turbines »
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English Turbines

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Re: iNAV.....Launch Mode....Default Settings
« Reply #1 on: May 02, 2018, 10:27:48 PM »

Bump..
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ched

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Re: iNAV.....Launch Mode....Default Settings
« Reply #2 on: May 02, 2018, 10:34:56 PM »

Sounds good. How do you trigger Launch Mode?
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English Turbines

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Re: iNAV.....Launch Mode....Default Settings
« Reply #3 on: May 02, 2018, 11:11:37 PM »

Sounds good. How do you trigger Launch Mode?

 Thats a good question...:)

1) Power your Transmitter.....Power up the model and wait for a Sat fix.

2) Select Launch Mode using a dedicated Channel.

3) Arm the Controller.

4) Set the level of throttle you want after Launch times out, and also the Mode you would like. Do not move any of the other flight controls or Launch Mode will abort.

5) At this point, note, the motor will not be running, a good indication its in Launch Mode.

6) Throw the model, stand back and watch the next 9 seconds...lol.


                                                                                                :vulture:
« Last Edit: May 02, 2018, 11:15:28 PM by English Turbines »
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ched

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Re: iNAV.....Launch Mode....Default Settings
« Reply #4 on: May 02, 2018, 11:19:05 PM »

That does sound like a great launch method.

It's amazing what the FC's and the Devs can achieve these days. Truly stunning technology at unbelievably low prices.
I do love all the tech and the pace of thinks.
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iwan_canobi

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Re: iNAV.....Launch Mode....Default Settings
« Reply #5 on: May 03, 2018, 12:37:27 AM »

I need to try this, thanks for the write up! What kind of delay is there before the throttle kicks in? I've seen some videos where people give a few fake tosses to get the motor going then chuck?

Just wondering if it would work for heavier models that need throttle to get in the aie
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English Turbines

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Re: iNAV.....Launch Mode....Default Settings
« Reply #6 on: May 03, 2018, 12:52:31 AM »

I need to try this, thanks for the write up! What kind of delay is there before the throttle kicks in? I've seen some videos where people give a few fake tosses to get the motor going then chuck?

Just wondering if it would work for heavier models that need throttle to get in the aie

 Hi m8,

 Id estimate its about 0.5 seconds or less after it leaves my hand, almost immediate. No chance of a prop strike anyway.
  Fake launching before throwing is just silly....Change the parameters, its easier, and safer.
The FC controls the angle of climb out far faster and more accurately than the pilot could ever hope to do it which is what makes it so useful IMO.

  You can do some fake launches if you want to play with the parameters, it's a good way to test it for sure, it's what I did.
  My Z84 is a polystyrene ceiling tile in terms of weight, so it's pretty easy to launch anyway.
Basically, you want the motor to start as soon as possible in all cases, I can see it being useful on a heavy Mini Talon for instance.

                                                                                                :vulture:                           

« Last Edit: May 03, 2018, 12:57:50 AM by English Turbines »
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Schalonsus

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iNAV.....Launch Mode....Default Settings
« Reply #7 on: May 03, 2018, 09:27:54 AM »

You can increase max angle and decrease accel. So starting is triggered easier.
For heavier model you can set idle throttle, so motor spins at the set value as soon as the plane is armed in launch mode
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English Turbines

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Re: iNAV.....Launch Mode....Default Settings
« Reply #8 on: May 03, 2018, 12:15:55 PM »

You can increase max angle and decrease accel. So starting is triggered easier.
For heavier model you can set idle throttle, so motor spins at the set value as soon as the plane is armed in launch mode

  Hi m8,
              Thanks for your input....So why even have a max angle..?...how does that work?...any ideas..?

               Yes, idle throttle can set the prop spinning before launch at a power level of your choosing, good point, however if you want to totally avoid a prop strike, then a 1000 or less value is probably best.

                    Another reason I posted this was for Big T, who recently suffered from nasty prop strike himself.

 Pretty sure he will be interested in Auto Launch for this reason alone.


                                                                                               :vulture:
   
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Nothing beats the smell of Jet-A at 800 Celsius...:)
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SW1900 & Storm.

iwan_canobi

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Re: iNAV.....Launch Mode....Default Settings
« Reply #9 on: May 03, 2018, 12:40:22 PM »

Reading the wiki it looks like you need to do a frisbee style launch with this mode, so if I do an over the head launch will it not work? Thinking of trying it on my mini drak although not sure I want to pile it into the ground...
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English Turbines

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Re: iNAV.....Launch Mode....Default Settings
« Reply #10 on: May 03, 2018, 05:17:25 PM »

Reading the wiki it looks like you need to do a frisbee style launch with this mode, so if I do an over the head launch will it not work? Thinking of trying it on my mini drak although not sure I want to pile it into the ground...


  It works on my Z84 ok, and I launched conventionally using the moulded hand grips with some sandpaper glued on for extra grip.

 I have since amended some of the parameters to make the motor run earlier as it wasn't quite fast enough.

 The FC is looking for forward acceleration to make it trigger, so frisbee or conventional launch will work okay.

                                                                                               :vulture:
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Nothing beats the smell of Jet-A at 800 Celsius...:)
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English Turbines

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Re: iNAV.....Launch Mode....Default Settings
« Reply #11 on: May 03, 2018, 11:02:21 PM »

Bump test...
Logged
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Falcon UHF & 1280mhz Video.
SW1900 & Storm.
 

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