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HSI turning smooth

PostPosted: 16 Jun 2017, 04:21
by LaelNeves
Hello Kitercuda! Congratulations on the beautiful work. I'm in love with Fly Is Fun, just one thing that bothers me, because the HSI in magnetic compass mode turns smoothly like a real HSI of an aircraft, but in navigation mode (in flight) is not it the same thing? It works with those classics locked like those old GPS, the sensation is that it has a lot of lag during a curve, my dream is to be able to see it sliding smoothly is it possible? ;)

Re: HSI turning smooth

PostPosted: 07 Jul 2017, 14:51
by kitercuda
Can you publish some video?

Re: HSI turning smooth

PostPosted: 07 Jul 2017, 17:11
by LaelNeves
kitercuda wrote:Can you publish some video?

Fly is fun - in static mode, smooth and pleasant movements

Re: HSI turning smooth

PostPosted: 07 Jul 2017, 17:12
by LaelNeves
kitercuda wrote:Can you publish some video?

Fly is fun - in flight mode, rustic movement, with lags

Re: HSI turning smooth

PostPosted: 07 Jul 2017, 17:24
by LaelNeves
kitercuda wrote:Can you publish some video?



Is there any way to solve this? I did an IFR procedure to test the app and I confess it disappointed me the way this HSI behaves during the laps, with lags or low frames ... I would like to see it turning smooth, I trust you and I know you will be able to improve .

Re: HSI turning smooth

PostPosted: 08 Jul 2017, 08:16
by kitercuda
Android GPS data rate is 1 position per second. There are to ways:

1. Use only GPS data - exact position
2. Use for example Calman filter for predicting position between 2 GPS fixes (smooth movement. but sometimes corrections), there are lags and not exact position

I decided to use point 1.

Re: HSI turning smooth

PostPosted: 08 Jul 2017, 14:16
by LaelNeves
Thanks for replying to me, I received the update and I'm going to test

Re: HSI turning smooth

PostPosted: 08 Jul 2017, 23:00
by LaelNeves
kitercuda wrote:Android GPS data rate is 1 position per second. There are to ways:

1. Use only GPS data - exact position
2. Use for example Calman filter for predicting position between 2 GPS fixes (smooth movement. but sometimes corrections), there are lags and not exact position

I decided to use point 1.


Maybe I did not understand correctly, the update I received on 08/07/17 today, was to test the modification regarding your comment, or do I have to do this in the FIF configurations?
I did a test flight today and did not notice any difference ...

Re: HSI turning smooth

PostPosted: 31 Jul 2017, 02:36
by germtangc
Hi. I may be able to provide some points to help you.
As admin said it, it is not FiF's fault for the "lag" but rather the 1Hz data refresh from Android device onboard GPS receivers. To solve this, I made an external bluetooth GPS (GNSS) receiver that can give 5Hz (5 updates per second). I don't have a video yet but I will put up one to show you how it looks like for FiF to display 5Hz location information.

Re: HSI turning smooth

PostPosted: 31 Jul 2017, 13:32
by germtangc
I made an FSX video using FSUIPC GPSout to demonstrate the difference between a "normal" gps receiver with 1 Hz update rate and my 5 Hz external bluetooth gps receiver.