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Flying times?
Trying out different batteries and configurations. What are your experiences?
Tags: Syma X9
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Airsucker
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February 7, 2015 - 10:39 am

Hey there. I am brand new to this excellent forum. Actually, I've been reading it for quite some time and finally decided to register and join in. As a fairly new Syma 107G owner, my son and I have really taken to it as a great hobby. Having already experience our fair share of crashes (some no damage and others major damage) we have become quite good at repairing pretty much anything on our little birds. Good father son time to be sure!

One question I have pertains to flight times. Now that I decided to upgrade to 240 mAh batteries, I notice that our average flight times have no been extended by very much at all. For example, in a simple extended hover (no tricks or flying around) the stock 150 MAh battery was getting us about 7.5 minutes out of the box. With multiple take offs and landings and hard flying the flight times dwindled down to just under 5 minutes. Now, with the upgrade to the 240 mAh batteries, extended hovering only gained us about one minute of flight time at best. The best I could squeeze out of the upgrade battery during my hard flying test was about 6.5 minutes. Does this sound about right to you?

Not wanting to modify the look and feel of our helicopters, I am interested to know if you are experiencing about the same flight duration as we are. Maybe all the hard flying and dog fight action (not to mention crashes and repairs) have taken their toll on the motors. We have not changed the motors as of yet.

Thanks for this great forum! 

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JamDJ
Lancaster, PA, USA
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February 8, 2015 - 10:38 am
Member Since: February 14, 2012
Forum Posts: 255
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Air,

  Glad you found us and welcome to the forum! Glad you can be here

and please post often. Am glad to hear you and your son have found

this new hobby together. My Dad and I had slot-cars and trains.

   To answer your question, well, there are alot of variables here.

First of all, crashes don't really affect battery life or power. These things

are pretty much indestructable as you know by now. The greatest benefit

of Syma is the cost and availability of replacement parts if needed.

  Second, alot of your new battery depends on where you got it.

Was it from a reliable source? Was it from an authorised Syma dealer?

How long did it sit it some warehouse before you bought it? (They can

go stale)

  When soldiering in the new bettery, did you put flux on the leads to get maximum

contact before putting the iron to it? Did you even soldier at all or just twist the leads

together?

  Not trying to give you the third degree, just making the point that there are alot

of situations that can affect battery time!

  You will get flooded with info on your topic soon, I hope! Also please check out previous

posts on here including "The 15 Minute Rule"!

  In my honest opinion, my battery upgrades didn't do much except maybe increase my

routine flight times by a minute or two for regular fun flights including the game on here,

check that out!

  Again, welcome to the forum! Your adventure has just begun! Your next question

will probably be 'what color to get next?'

                                                            Happy and safe flying!

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Airsucker
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February 8, 2015 - 2:43 pm

Thanks for the response JamDJ!

It sounds as though you got similar times with your battery upgrades as well. To answer your questions, we did not adhere to the 15 minute rule with out original batteries. I only found out about this after looking at your web site. Since then, we are very good about the down time after flying and before charging. The new batteries have never been charged before cooling.

Now, I can not attest to the quality of the source from whom I purchased the batteries. I got them on eBay and they came from China. For all I know they may have sat in a warehouse quite some time. Also, as they came from this low price source I can not attest to the quality of the materials used in their manufacture. Finally, as for my soldering skills... I have been involved in electronics design, troubleshooting and repairs for most of my life. I used my preferred brand of solder on this project which is the Ersin Multicore (5 core) solder. The solder contains it's own flux which comes out while being heated.

I like to use the Ersin solder any low voltage electronics because of the non-corrosive 60/40 alloy content. For soldering wiring larger than 18 SWG, I prefer to go with the resin core Kester product. The only thing I did differently than you (as seen in the video on this site) was rather than cut the wires off the old battery, I simply used an exact-o-knife to cut some of the yellow plastic covering over the old battery terminals and un-solder the helicopter wires from the battery itself. I then used those same wires and correctly soldered them to the new battery. By correctly, I mean that I heated the iron to the 3rd position on my soldering station and placed the heat directly to the new battery posts individually. While heated, I connected the helicopter wires to each terminal and removed heat once I could see the solder absorb thoroughly on the wires. After connecting the new battery, I insulated it with just a dab of 3M industrial grade silicon. I felt this would be better than tape.

So, the next thing I would like to try is a quick replacement battery configuration. I have seen some applications where folks have installed quick disconnect connectors used Velcro on the bottom to affix the battery. I like this idea but i don't know if it's really worth the trouble of re-balancing the helicopter of removing the weight from the nose. My goal is to try to achieve an average 15 minute flight time without changing the look and feel of the helicopter.

I was able to achieve consistent 12 minute flight times by removing several parts. This cause some slight differences in handling however, the helicopter flew quite well. Neither I nor my son (he is 13 years old) cared too much for the look of the helicopter so we put all the parts back on and have lived with the 6.5 minute flight times.

I would consider purchasing a known quality 240 mAh battery from a local reliable source but now that I know you did this and still achieved about the same results as we did, perhaps there are other avenues to explore? 

Thank you again for this wonderful forum! I think I have read and enjoyed everything on here so far. 

Air 

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Redfive
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February 14, 2015 - 6:11 am

The best way to have lots of flight time is a few more helicopters so that you can fly while charging others.

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