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Nov 19, 2001, 04:34 PM
Registered User

help in restoring performance on zagi

Hello everyone,
After flying my zagi for about 15 times, I notice the performance wasn't like it used to be. It used to do loops on level flights but not anymore. The speed and climb seems to have decreased. Is there anything I can do or check to restore the performance on my zagi 400x. The setup is p450, 6.5X4 aeronaut, 8xcp1300 with astroflight 215d esc. Any suggestions and advice is deeply appreciated. Thanks for your time and concern.

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Nov 19, 2001, 05:00 PM
Barrett's Avatar
Im not familar with all the equipment that you are using, but only 15 flights seems like a short life. Maybe you can be a little more specific with us. Like, what kind of throttle do you use during a flight, full power non stop will decrease performance over time. So if you go all out all the time maybe you should slow down every now and then. Also are you giving your motor and batteries time to cool between flights? Always wait until everything (batts, motor, ESC, servos, etc, etc..) has chilled out before your next flight. Or in the case of batteries wait to charge them as well.
Check to see if anything gets way to hot after a flight. Ive heard that batts and motor should only be warm under normal flying conditions in a plane like a zagi or speed 400 size plane. And im in no way an expert on these things so just remember that im trying to get you thinking, so post again with a little more info and see what the guys and gals here come up with. Good luck!
Nov 19, 2001, 06:33 PM
Registered User
Sorry for the lack of info. My zagi has about 40 flights. I took it out about 15 times with 2-3 paks everytime. I never quick charge it at the field. I always let it cool before I charge it at home. My paks are warm not hot after flight but not sure about my motor or esc. I fly it at full throttle almost all the time. I charge my paks at 1C. Let me know what other info you guys need to help me figure out what is wrong. Thanks

Nov 19, 2001, 07:54 PM
Registered User


sounds like you've worn out your brushes. spend 5-10$ and replace them. That should do the trick.
Nov 19, 2001, 08:06 PM
Registered User
mtayl's Avatar
Three things to check: your motor, prop or battery. Sounds silly I know, but make sure your prop isn't slipping on you. I'm not familiar with the p450 but if you can change your brushes then check those.

Your pack is another obvious thing to look at. It was unclear in your post whether or not you are seeing this slowdown with all three of your packs. If you are, then I would certainly suspect your motor. Do you have another one you can quickly swap it out with? I fly full bore most of the time but I also do 1 minute of just tooling around kind of stuff to give my motor a chance to cool off before it's vertical again.
Nov 20, 2001, 12:34 AM
Registered User
Thanks for the replys. I will check out my brushes. How do I know when the brushes are bad. Where can I get some brushes. Does it have to be the brushes for that motor or all brushes are universal. If it is the battery how can I improve the performce on my battery. Thanks again.
Nov 20, 2001, 12:18 PM
Barrett's Avatar
A good charger like the FMA supernova or the Robbe infinity II will be a good investment if you want a way to not only improve you battery performance but also have a way to monitor thier performance.
Nov 20, 2001, 03:16 PM
Registered User
RonJ's Avatar
Sounds like my Zagi-X a month ago. Checked it out with a tachometer and revs were down almost 2000.
A drop of oil on each end of the shaft and the revs picked up a little, This is on a Max 480 with a MAS 5.5x4.5 prop and Zagi's 8-1700 nicad set up. The old Zag is heavy and well used.
Dymond had a cobalt 480 on the shelf at a price I couldn't refuse. We matched it to an APC E-prop and headed for the field. I could tell by the sound that it was going to go, and it did. A new experience from an old war horse. I like it, especially when I cranked up the throws.
I have a couple of can type 400 motors that I feel are worn out, i.e. can't get the revs out of them anymore. For 8 bucks or so I could get a new one. For 40 bucks more I got a cobalt with bearings and replacable brushes and some serious power.