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Home✈️Aircraft🚁Helicoptere-AlignT-REX 450 › 450 pro should work with 2200mah 20c?
04-02-2010 01:22 AM  10 years ago
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helibro

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hamilton, ohio

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450 pro should work with 2200mah 20c?
should a 2200mah 20c pack work ok on the 450pro?
hey! were is the reset button!
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04-02-2010 01:49 AM  10 years ago
AWittleWabbit

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O.C., CA

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NO

Unless your going to just hover at a lower head packs.
Here's my pro with 30c rhinos.

I really don't think you will be happy flying 20c packs.
I wasn't happy with 25c zippies.
Heli-itis sufferer.
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04-02-2010 02:18 AM  10 years ago
jamese

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Carmel, IN

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I fly 20C zippies and its just fine. I don't o 3d but I do flips rolls loops stall turs etc. I run a 100% flat throttle curve
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04-02-2010 02:23 AM  10 years ago
Spitfire1

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Perth Australia

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In my experience the difference in pack performance is more down to different brands than what ever there particular C rateing happens to be, remember thats exactly what it is. the company who manufactures the packs rateing on what they think the packs maximum discharge rate is.

I still think its best to get the highest c rateing you can, theres not much price difference anyway, specialy when small 3s packs are so cheap anyway.
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04-02-2010 11:32 AM  10 years ago
helibro

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hamilton, ohio

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well is why i asked is due to im running a 2200mah 20c pack in my pro and fully charged i can only hover for like a min before the tail starts to pulsate? seems its one thing after another with this pro. i will try a high c rating.hey! were is the reset button!
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04-02-2010 12:00 PM  10 years ago
bobbyshafter

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ny,usa

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If you can only hover for a min,that is not caused by a low c rating .
Possible causes are ,bad lipo, defective or improper setting esc ,too tight gear mesh.
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04-03-2010 02:44 AM  10 years ago
dkshema

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Cedar Rapids, IA

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Wabbit -- your chart shows a momentary peak value of 44.76 amps. The average is just under 13 amps.

A 2200 mah 20C pack has a continuous rating of 20C -->

2200 ma x 20C = 44 amps.

The 20C pack probably has a 30C burst/peak rating.

The 20C, 2200 mah pack is sufficient for that kind of flying.

-----

Bobby -- If you're only able to get a minute of hovering before things start to go south, you have other problems, as noted by Helibro.

What motor, how many teeth on the pinion? Your main gear to pinion mesh may be too tight. Loosen up the motor, slip a strip of printer paper between the main and pinion gear. Push the pinion towards the main gear to take up the slack, and tighten the motor screws. The thickness of the piece of paper will give you a reasonable amount of backlash in the gears -- not too much, not too little.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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04-03-2010 04:15 AM  10 years ago
helibro

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hamilton, ohio

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its the stock "m" motor the chrome one not the black one and stock pinionhey! were is the reset button!
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04-03-2010 04:20 AM  10 years ago
jester4

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Brampton, Ontario

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dkshema is correct.

You can do more than just hover with a 20C pack. I flew 20C in my V2 for a little while and it was just fine. I pretty much learned to do 3D with a 20C pack. Where the 20C pack fails is when you need to bail and give it all kinds of collective and the power just isn't there. No you can't thrash it around like the higher C packs, but if you are nice to the collective and try to be smooth you should have no issue.
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04-03-2010 04:44 AM  10 years ago
LonR

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Macomb,Mi

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It really depends on what brand 20C packs they are.If its the cheap Ebay packs they won't work as there over rated,more like a 12C pack haha..You'll be good with a 20C zippy.I ran 25C Zippys and had the same issue but found out it was my ESC setting,once I reprogramed the ESC I could toss the heli around like a wet noodle for 4 mins.Reprogram the esc to these settings

Brake disabled ----------------- 1 beep
Mid timing --------------------- 2 beeps
High cutoff voltage protection - 1 beep
Helicopter soft start ---------- 2 beeps
Quick speed -------------------- 3 beeps
600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan
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04-03-2010 05:09 AM  10 years ago
AWittleWabbit

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O.C., CA

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Dkshema, a 20c pack should by definition hold up to a momentary peak of 44amps. I just prefer to have healthy margin in C ratings. I should have explained my rationale to the op. I did feel a difference switching between packs though. It wasn't a apples to apples comparison since the lower C pack had some use on it. It was still enough for me to retire the lower C pack to glow starter duty.

I guess if I had to quantify it, the last half of the flight (when I'm warmed up) is where the lower c pack fails me.
Heli-itis sufferer.
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04-03-2010 07:11 AM  10 years ago
Spitfire1

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Perth Australia

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Seems to be a fairly common problem with 450 size helis, Ive had a few people over the years had 450`s that run there pack down in about 2 minutes, belt tension and pinion lash must be far more critical on 450`s than 500`s and 600`s.
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04-03-2010 08:13 AM  10 years ago
nivlek

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Norfolk England

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Dkshema, a 20c pack should by definition hold up to a momentary peak of 44amps.
No , by definition , it should be capable of 44A continuous , the momentary peak would be higher .
At the end of the day , it gets dark .
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04-03-2010 08:48 AM  10 years ago
AWittleWabbit

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O.C., CA

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Dkshema, a 20c pack should by definition hold up to a momentary peak of 44amps.[/quote No , by definition , it should be capable of 44A continuous , the momenary peak would be higher .
I stand corrected. I should have written more clearly.
Heli-itis sufferer.
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04-03-2010 01:28 PM  10 years ago
Melnic

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Columbia, MD,USA

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A lower C rated zippy will have a higher Internal Resistance than a Higher C rated zippy. The 20C will drop more voltage uncer load than a 30C. But you should be able to hover a 20C for at least 5+ minutes on a pro if not longer unless you gott a bad cell or the pack has been abused and one or more cell's IR has increased beyond reasonable amount.
Balance charge your pack. Measure the voltage of each cell.
Let it sit for a day, then measure it again. A bad cell might drop below 4V in a day.
Fly the pack, After a minute (or when it starts pulsing), measure the voltage of each cell, see how balanced it is.
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04-03-2010 04:26 PM  10 years ago
helibro

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hamilton, ohio

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thanks guys i checked the pinion/gear mesh i will try it out after the rain stops and check the cells after it starts to pulsate thanks alothey! were is the reset button!
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04-03-2010 05:02 PM  10 years ago
ThermoSTS

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Stirling, NJ

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Somethings not right
I have 450 Pro electronics (35X/450M/GP750/DS520)on my EXI and I have Zippy 2200 20c packs. I got a DX7 on Thur. and had it out yesterday dialing it in. I was hovering my pacs for 5min. each so something is not right somewhere. Check the battery you might have a bad cell. Otherwise look for binding and check all your bearings.
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04-03-2010 06:23 PM  10 years ago
dkshema

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Cedar Rapids, IA

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A 2200 mah 20C pack has a continuous rating of 20C -->

2200 ma x 20C = 44 amps.

The 20C pack probably has a 30C burst/peak rating.

The 20C, 2200 mah pack is sufficient for that kind of flying.
To quote Horton the Elephant...

I meant what I said and I said what I meant...

Red would be the continuous discharge current rating for a 20C pack. It probably has a burst, or peak discharge as indicated in blue.

-----

If your ESC has a programmable cutoff voltage option, it's probably defaulted to a high voltage. Choose a lower cutoff rating. I ran across a similar issue when I first got my Trex 250. Lowered the cutoff voltage, I can now fly entire packs without trouble and still end up putting back less than 80% of total capacity.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
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04-03-2010 08:23 PM  10 years ago
Richardmid1

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Leeds, England

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4-5 years ago a 20C pack was the best you could get! I had some 10C packs that were great! You can get 50C packs with 100C burst now!! 60% of the time, it works every time!
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04-05-2010 02:43 AM  10 years ago
helibro

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hamilton, ohio

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what zippy packs are the good ones? i guess i will try a new pack before i give up on this thing for good.hey! were is the reset button!
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Home✈️Aircraft🚁Helicoptere-AlignT-REX 450 › 450 pro should work with 2200mah 20c?
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