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New s107g's
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JimRuppel
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May 2, 2013 - 11:52 pm
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I'm new to RC helicopters. My wife bought me a UJ369 for my birthday a few months ago. I promptly crashed it beyond recognition. But I had so much fun doing it and had a few good flights that I bought a pair of S107g's. I live just outside Denver at 8500'. Does altitude affect flight time? I only get 2-3 minutes of good time then a few minutes about 3' off the ground. Easy and great fun to fly.

 

I also have questions about charging. With the usb cord the red light is bright when I plug it into the usb pot and goes out when plugged into the helicopter. When it comes back on it blinks then goes solid bit is not as bright as when unplugged from the helicopter. Do I wait for it to get that bright. Also I have a wall charger that is 4.2v 800ma. When plugged into a wall socket a red light comes on and never changes when charging.

 

Thanks for any suggestions.

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Syma Freak
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May 3, 2013 - 5:59 pm
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gday_mate-4146I believe from other post altitude can cause some problems, I am at sea level,as for charging via usb correct red light goes out then starts to flicker red,wait until solid,then wait a little longer to see if goes back to original bright red-some usb cables do not-you should get more than 3 minutes flight-let battery cool down for 15 minutes after flying before recharge

"Fly like a butterfly sting like a Syma" http://syma107.com

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JimRuppel
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May 3, 2013 - 11:19 pm
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Thanks for your reply. I do let the batteries cool, usually much longer than 15 minutes. Do you know anything about the wall charger?

Been reading,  more confused. I have a 4.2v 800ma wall charge that came with the 2 S107gs I bought from Amazon. One place said never use a charger over 500ma. This site seems to concur. Should I send the charger back?

 

Also another site seems to think the USB cord has an automatic cutoff. One person said they leave their heli on charge overnight. Heard that is a real no-no. With my USB cord the light blinks then faintly pulses. It's not as bright as when it's not plugged into the heli. Do I let it charge until it gets that bright?

 

 

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rob52
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May 11, 2013 - 10:56 am
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Hi Jim. I'm new to RCs myself. I am by no means an expert, but if it were me, I would not concern myself so much with the lights as the amount of time it's been charging. If it's been plugged in for 90 minutes (or at least 2 hours) and the light on the charge cable is still just blinking, it should have a full charge by then. If at the end of 90 minutes, you're still only getting 3 minutes of flight time out of BOTH helicopters, I'd say there's something wrong with the charger, or maybe even the USB port. How old is your computer? Anyway, the point being, it's highly unlikely that both helicopters would have a faulty battery, therefore the problem must be elsewhere. I wouldn't think the air density up there would have that much of an affect on your flying time. Granted you are using a bit more power to stay aloft, but nowhere near twice as much. I'm getting around 6-7 minutes out of my 107, consistently. When the battery runs dry, it seems to happen suddenly. One minute she flies just fine, then all the sudden she starts losing altitude, goes to the floor and won't lift off again. It's that way with my S107 and my larger 4 channel F162 Fire Wolf. I've never had them be able to fly just inches off the ground for a while as the battery runs dry. Once they quit flying, they can't fly low to the ground. They're completely grounded.

 

The instruction manual for my Syma S107G states the following (referring to USB port charging): "Put the charging wire into the computer USB interface, the charging wire will be light (chinenglish for "lit"). Put the other side of the USB charging wire into the helicopter's interface.USB charging wire light will be turn(ed) off. The charging time is about 40-50 minutes. Charging wire light will turn on. Then the helicopter is fully charged."

That's it, ver betum. It says nothing about the charging wire blinking.

 

As for the 4.2 charger that they included, does it charge the helicopters if you leave it plugged in for an hour or so? How long are you waiting for the light to go out (or start blinking)? I've learned you can't always rely on those instructions. The instruction manual that came with my F162 said to plug in the charger and a green light will come on, then plug into the battery, when charging the light is red, when charging is complete the light is green. What actually happens is, when I plug in the charger the light is red, when I plug the battery into the charger, the light goes off, when charging is complete, the red light comes on again. I'm like "what  $&@%ing green light"? I was like "either it'll charge or it won't", so I patiently waited, and when the red light came back on an hour later I was good to go.

syma_sig2-4.png     

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Syma Freak
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May 11, 2013 - 6:10 pm
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Just a point,have bought heaps of helis,do not rely on a usb cable to stop charging,helis I bought from Ebay were fakes and the usb cable faulty,maybe consider this,say you were charging a Gopro camera via a usb,when charged light goes out and beeps done with mine-to me a syma heli has great tech stuff on the mother board but not a shut off for charging-hey just my opinion,a usb cable is just that,how much tech stuff do you think there is in a cable..open to opinions!!

"Fly like a butterfly sting like a Syma" http://syma107.com

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JimRuppel
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May 11, 2013 - 11:59 pm
Member Since: May 2, 2013
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My wall charger red light came on when plugged in and stayed on. I used a timer set to 45 minutes. My biggest question is do these batteries always get warm? I've pulled the cowling off both helis and feel no warmth in the batteries, even when the lights say they are fully charged. Maybe I should wait until they get warm.

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rob52
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May 12, 2013 - 3:43 am
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Hello again, Jim.

 

45 minutes isn't quite long enough. I would give it at least another 20 minutes. You could check the warmth of the battery every 10 minutes if you want, but a 60 minute charge is not going to hurt anything. If you could answer these questions it would help:

 

1. Do the Symas fly after 40 minutes on the wall charger?

2. If so, how long do they fly (time both of them)?

3. How much throttle are you having to use to lift off and climb to the ceiling (1/4, 1/2, 3/4 etc)? My S107 easily lifts off and climbs straight up with less than half throttle. If yours takes substantially more throttle to lift off and climb, then your altitude there in Denver could be a big factor in the short flight time.

 

4. Using Syma Freak's pictures and information on his HomePage, are you certain your S107s are original Symas, and not copies/imitations?

 

How to spot fakes or clones: (thanks for posting this VERY useful info, Syma Freak)

http://syma107.com/clones-and-.....syma-s107/

syma_sig2-4.png     

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JimRuppel
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May 12, 2013 - 4:10 am
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Thanks again for the reply.

 

They both flew after 45 minutes on wall charger. It took 2/3 throttle initially to go to my lofted ceiling (about 15'). I did time them, one lasted a little over 2 minutes then faded, the other around 3 minutes. After that both will continue to fly about 18" off the ground for a while. I never ran them until they failed.

 

I believe I have genuine Symas, the box checks out, the motors are black and white, the circuit board light is green and the board reads "S107R5". The only thing that is different is the TX, no spring on the left stick. I read that some of the later TXs came that way from  Syma.

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rob52
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May 12, 2013 - 5:03 am
Member Since: May 11, 2013
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Yeah, your ships are genuine alright. Everything seems to check out. My remote has no throttle return spring either, but aside from that, the back of the hand grips are textured and it's identical in every way to OEM.

 

It seems very strange to me, and maybe Syma F can chime in on this, that your helicopter will continue to fly close to the ground for a good bit of time after it loses altitude and will no longer climb. For my helicopters at least, that it very unusual behavior. As I stated earlier, when my chopper runs out of juice, it goes to the ground and cannot get up again, not even a few inches. For yours to behave that way, makes me think that your altitude may be more of a factor than I originally thought. I would try a longer charge to see if that helps. If it doesn't, I'm not sure there's anything more you can do, short of performing some kind of mod. Perhaps some blades that have a steeper pitch, or maybe a stronger battery, or maybe get yourself a piece of bottom land, lol.

 

Seriously, I saw a youtube vid where a guy replaced his tail rotor blade with one from another model, that had much more pitch to it. He had to loosen the little L shaped rear motor bracket and turn it upside down, because the pitch on the blade was opposite OEM. He didn't give any specifics on what tail rotor blade he used. Anyway, just modding the tail rotor wouldn't help you. You would need more pitch on the main rotor blades as well, to bite more air. I'm not even sure this is possible, but it's worth looking into.

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