Search found 87 matches

by JimB
Mon Oct 27, 2014 2:27 pm
Forum: Sport SX
Topic: Wind Vector
Replies: 4
Views: 8974

Re: Wind Vector

Thanks for the reply Jeff. I really appreciate that you answer questions here that require knowing how the code is written. Helps me understand how my EFIS operates:) I did the magnetometer cal again yesterday and got a flatter correction curve. Still a sine curve but the max deviation is about 15-2...
by JimB
Wed Oct 15, 2014 3:48 pm
Forum: Sport SX
Topic: Wind Vector
Replies: 4
Views: 8974

Wind Vector

When flying straight and level, it is not unusual for the wind vector to change direction significantly, say from the right of the aircraft to the left. And many times it will change back after a few minutes! Often the wind vector is a very different than forecast winds. Often seems like heading and...
by JimB
Tue Sep 09, 2014 12:06 pm
Forum: EIS Programming
Topic: EIS data
Replies: 6
Views: 20034

Re: EIS data

Thanks Jeff. Any suggestions for a suitable serial data logger?

Jim
by JimB
Sat Aug 30, 2014 3:49 pm
Forum: EIS Programming
Topic: EIS data
Replies: 6
Views: 20034

EIS data

I am working with just a EIS, no EFIS. I want to record and download data during test flight. I see there is EISLog software. How do I use this? How do I get and record the serial data from EIS? Can I just connect to a laptop serial port? Do I need both serial in and sreial out from the EIS? Any hel...
by JimB
Thu Jun 26, 2014 8:06 pm
Forum: Sport SX
Topic: EFIS breaks Comm squelch
Replies: 2
Views: 5754

Re: EFIS breaks Comm squelch

Have finally found the problem. I have XM weather which uses a WxWorx reveiver and remote GRT processor. Turns out the WxWorx receiver is creating the noise. It is on its way to them for installation of shielding. I found that booting the EFIS with the power to the WxWorx removed there was no noise....
by JimB
Wed May 21, 2014 12:18 am
Forum: Sport SX
Topic: EFIS breaks Comm squelch
Replies: 2
Views: 5754

EFIS breaks Comm squelch

I have dual Sport HS EFIS. Have been installed for several years. Have always had a problem that the comm squelch on my GNS430 breaks for no reason. Have adjusted the sensitivity of the comm squelch to no avail. Today I experimented and found if I have the 430 powered up and then turn on the EFIS, t...
by JimB
Thu Feb 20, 2014 2:30 pm
Forum: Horizon HX
Topic: Looking for Instrument Instructor Who Knows Horizon HX EFIS
Replies: 3
Views: 7412

Re: Looking for Instrument Instructor Who Knows Horizon HX E

Bob's advice is very good. I find that I leave my PFD set as usual and display the HSI on the MFD. That way the PFD display is as I normally see it. When I tried the split screen, I had to look to find stuff and the display gets pretty cluttered. Now I have my MFD Map page with just two screens avai...
by JimB
Thu Feb 20, 2014 2:15 pm
Forum: Sport SX
Topic: Attitude Issues
Replies: 2
Views: 5734

Re: Attitude Issues

We had problems with the mag heading changing in flight. Didn't happen often and we couldn't make it happen on command. Eventually we relocated the magnetometer and that solved the problem. I think our problem was actually caused by radiation from the comm antenna. The new location is 10 - 12 feet f...
by JimB
Thu Jan 16, 2014 3:15 pm
Forum: EIS Installation
Topic: aux input sensitivity
Replies: 4
Views: 13003

Re: aux input sensitivity

That should work fine. You probably won't need any filtering and I would try it first without any (always take the easy way first!). I used this amp for several years on a fuel pressure for my EIS. Do you know how to calculate Offset and Scale Factor? There is an article in the files section of the ...
by JimB
Tue Jan 14, 2014 9:48 pm
Forum: EIS Installation
Topic: aux input sensitivity
Replies: 4
Views: 13003

Re: aux input sensitivity

Yes it is too small. 50mv is only 1% of 5 volts. So your input would vary less than 1% of expected input range. You may also find that there is noise in the aircraft that could be a significant factor - it may be as much or more than your signal. Two possible solutions. You can put a amplifier on th...