Mini Talon Crash (EzUHF problems)

[FPVSteve]

! No longer available

So it went into failsafe at 20 yards (!) out and correctly levelled out in PA mode since this was the first flight.

I was pushing full left to try and get it back .. . when it glitched back into control the plane rolled as commanded. Unfortunately it then lost the link again but the plane was banked too hard for the Cyclops Tornado to correct it (the stupid "shaking" symbol) , so it hit the deck... looks like it just started recovering as it hit the mud so the wing was unscathed.

Boo! Combination of pilot error and (primarily) control link failure methinks.  If I had of turned the Tx off PA mode would have landed it with 0 throttle .. d'oh.

No real damage except for some missing foam from under the front canopy and a loss of confidence in the UHF link lol

[Brucey]

Sorry to hear about your crash. But
1) did you check the noise floor with the spectrum analyser function in the RX?

2) What antennas are you using on the Tx and Rx?

3) Is this a JR module? And are you running the latest firmware?

[FPVSteve]

1) yea I did but wasn't entirely sure what I was looking for tbh

2) this was a mag mount antenna, wish I'd tested it on the diamond first

3) Yes, JR module - not sure on firmware, will have to check.

[BlueFlyer]

This is what I would do...

1st, on the sander style antenna, unscrew the dust cap and make sure the wire is actually soldered to the centre pin... unfortunately in the past, some have been poorly made. (my own home made ones perform better than the stock antenna... and can be tuned for 440MHz which is the centre frequency for extreme hopping)

if the sander style antenna is ok...

2nd, Download the latest ImmersionRC Tools. http://www.immersionrc.com/?download=4894

Reflash both the JR Module and the RX with the latest firmware. http://www.immersionrc.com/?download=4902

Set them both up for extreme hopping.

Set them both up for "Traditional EzUHF Transmission" (you'll see what I mean in the latest IRCTools)

Rebind the RX to the JR Module.

Carry out a range test with the Diamond Antenna on your TX and stock sander style monopole on your RX.
Repeat range test with Mag Mount Antenna on your TX and stock sander style monopole on your RX.

This will only tell you if there's a problem with your mag mount antenna, it wont highlight any "noise" issues but at that distance I find it hard to believe that a "noisy" component on your MT would cause EzUHF to failsafe.


Wish I lived closer, 2 heads are normally better than one and we could help each other out with different stuff. When I lived down in Wiltshire I was the only FPVer for miles and it sucked.

[FPVSteve]

Okay done all that (apart from the range checks).

Bear in mind I'm in the house with WiFi routers and everything else associated with "Home" but this doesn't look right to me:



The servos were glitching a little as well. Just a little, but it was definitely happening.

Both Tx and Rx are on 1.50 (6) firmware, 430-450MHz Extreme Hopping, Traditional PPM - PPM Failsafe.

Any ideas?

This is with the Diamond antenna attached btw. I expected to see a spike on 433 or something though. (Or is this due to the extreme hopping)

- EzUHF n00b :)

[English Turbines]

Run the motor up with prop on to load it....watch the scan....expand the band a bit from say 400 to 475mhz so you can see all of it...

Compare motor on with motor off.....

:vulture:

[FPVSteve]

Can't run the motor up in the house, little ones asleep heh.


Some screens:

All powered down apart from the Rx:


Plane powered up including FPV gear


GOPro turned on with plane powered up


Transmitter turned on Low Power Mode


Transmitter turned on High Power Mode


(Also it made my laptop go into standby mode heh).

[FPVSteve]

That's really weird actually ... how come it was so RF crazy beforehand? I'm sat in the same seat...

[English Turbines]

That's really weird actually ... how come it was so RF crazy beforehand? I'm sat in the same seat...

Because you have increased the range of the dbm....by a lot...lol.

:vulture:

[FPVSteve]

:laugh:

Nah but if you look at it, the peaks are different by a fair chunk

[English Turbines]

You need from 0 to -140 dbm vertical range on the Scanner......leave it Scanning during the test would be better I think...so you can watch for changes..?

:vulture:

[FPVSteve]

I miss my FrSky :(

[English Turbines]

The peaks are still as before, they look wildly different because of the range....or to put it another way, you are now "zoomed out"

:vulture:

[English Turbines]

I love my EZUHF....4kms on Lo TX power....:)

:vulture:

[English Turbines]

Steve....if you go on xjets channel...Im pretty sure he covered the Spectrum Analyser in his Clip....Its really bad of Immersion to not have Topic help files inside their tools gui...Unbelievable really..:(

:vulture: