View Full Version : Testing/Review of the Spektrum module for the 14MZ
MrMel
08-16-2007, 03:14 AM
Depends who you the answer from I guess
When I asked they said "The latency on the module systems is about the same as standard FM modulations"
I replied asking some more questions I got
"If you try those systems in PPM mode you will see the same thing. If you are using those systems in PCM mode will be better. "
I wish I had an old PPM receiver laying around to test how it goes.
Anyone have it?
Finless
08-16-2007, 03:21 AM
Well I saw Andy Rummer from Mikado flying the module on his 14MZ at IRCHA. I didnt get a chance to talk to him about it but I am sure he would notice and issue so I am at a loss as to why he hasnt noticed any interaction issues.
I dont have a old PPM RX to test with....
Bob
MrMel
08-16-2007, 03:29 AM
He's using VStabi right?
Using vstabi your radio is using 90 degree 1 servo setup, not ccpm..
Finless
08-16-2007, 03:34 AM
That would explin it then! Good catch.
Bob
It is interesting to note that some veeeeery good pilots are flying it in eCCPM mode and say it feels just fine.
Yeah, anyone using it with a mech mix heli, V-Bar, CycLock (flybarless or not), Helitronix mixer, etc., won't have any issue at all.
- John
d_wheel
08-16-2007, 12:51 PM
Well I saw Andy Rummer from Mikado flying the module on his 14MZ at IRCHA. I didnt get a chance to talk to him about it but I am sure he would notice and issue so I am at a loss as to why he hasnt noticed any interaction issues.
I dont have a old PPM RX to test with....
Bob
What is your address? I will send you one.
Later;
D.W.
MrMel
08-23-2007, 07:05 PM
Yeah baby!
Postman arrived with some cyclocks from CSM today, since 120 degree mixing occurs on the heli now, everything works perfectly!, so back to using the 14MZ again.
Sure you need the laptop to trim the swash, but hey, there is no free lunch :p
mindwipe
09-14-2007, 05:28 AM
This is a comparison of a 9C with 35Mhz module and then the 7ch FASST module.
http://heli.rodenkirchen.se/eccpm_fasst.wmv
Be prepared for interaction !!
Finless
09-14-2007, 08:16 AM
WOw thats not too good! I hope the FASST for the 14mz doesnt do that!
Bob
MrMel
09-14-2007, 08:19 AM
If you time the tail perfectly you could probably do piroflips with just pitch-pumping with that system :D
superpin
09-14-2007, 02:39 PM
Well, I have removed the video since I found the problem. Futaba isnt to blame, it was my fault, or at least my receiver pack. I didn't check that since it worked when I tried with PCM/35MHz, but for some reason the FASST setup draws more current and with one bad cell in the pack it gave this phenomena. I swapped back and forth at least six-seven times with the same result so I never checked my power source...
Sorry about the fuzz!
The good thing is probably that the reciever didnt reboot during the low voltage condition!
//Ola, feeling like an idiot...
> The good thing is probably that the reciever didnt reboot during the low voltage condition!
Or maybe it was and that is part of what was going on.
Please keep the video as it is a good reference for what can happen. Relabel that part of the video if you want. Also, please post a new video of how it looks now.
Thanks,
John
R-4-L
09-14-2007, 02:46 PM
wow dude ! I am glad you found the cause, that vid was scary !
superpin
09-14-2007, 04:22 PM
Ok, the video is back, same link and filename but with an added clip with the system running on a new 6 V pack. I also compressed it a bit more, it's less than 14 megs now.
Regarding the low voltage reboot, I don't think it rebooted since it seems like it takes a moment (probably less than a second) to recover and re-establish the link if I remove power momentarily, and the red LED lights up during the initialization, something that never happened during my tests. But I will probably never know since I don't own a multi-channel oscilloscope, or any scope at all...