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Hello from Texas
Tags: Syma X9
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JMBishop
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November 29, 2011 - 6:34 am
Member Since: November 29, 2011
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I purchased a 3rd party s107 from a Fry's electronics for $40 a few months ago. I flew it for 1 day, all day. I quickly came up with ideas to modify it, the only idea I tried was changing the pitch on the tail rotor and it worked amazingly well.

 

I left my helicopter at a friends house that day, his dog found it and destroyed the body, rotors and battery. Luckily I had a full set of rotor to put on it. The only thing I need to make it fly is a battery. I ordered a few different sizes from hong kong to play around with to see what will get me the best performance. I have yet to receive the batteries but it is still within the quoted shipping time so I am not worried.

 

I did a little research and found out my helicopter was just a rebranded s107 and found them for sale around $20 on amazon so I picked one up. I received it today, have flown it twice and have already started to modify it. I will keep tweaking this thing until there is nothing left to do, I may even offer some of my unique parts/mods for sale.

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CPD
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November 29, 2011 - 11:31 am
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Quick question- what do you mean by changing the pitch of the tail?

 

Changing the blade pitch, or angling the motor?

 

Too bad for the first one. They have "original factory batteries" on amazon, and the bodies are cheap- something like 3.50. Might only be able to get one that doesn't match, but OD Green spray paint'll fix that!

 

(personally, I like the look of Krylon "Italian Olive")

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JMBishop
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November 29, 2011 - 12:09 pm
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I can do without the body, it will be a good test mule/

 

I bought batteries with higher AH, This should give me better flight times. The batteries I bought to experiment with range from 200 mah to 500 mah

Yes I did change the pitch on the blade of the tail rotor, on the one I got today I also flipped the tail rotor. I did notice a difference that I'm guessing is because it is washed out less by the main rotors, a better fix would be a longer tube for the tail rotor extending it further away from the main rotors. I am going to try a bigger tail rotor soon and extending the tube for the tail rotor.

 

I've also been playing with the balance bar, I am not getting higher speeds from replacing it but I am getting better acceleration, longer flight times and faster climbing in elevation.

 

I tried removing the spring in the controller but I didn't like it, I got used to the spring and feel like I can control it better with it.

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CPD
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November 29, 2011 - 1:52 pm
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I guess try the off-branded picooz tail rotors, or see if you can fit the ones off of the s032g. If you put too big of one on though, from what I've read, you need to put a main motor on instead of a tail motor. I've also seen a guy cut the boom and tilt the motor. If you put it downward, such as w. the picooz, and tilt it backward (kinda like /---==) then it'll get much faster acceleration, but a slower top speed. On my pet project, I'm thinking of putting it forward (\---==) then it'll have insanely slow reaction times, even probably going backward, but it would, in theory, give a much faster top speed, since it would have the most thrust downward at the best time. Then, it would need a much higher thrust, since less is going downward, which would be painful when stopping, but would also give even more foreward movement.

 

As far as the battery, 500 MaH would be crazy! I think the originals are like 150 or something! I wonder if it'd give a longer flight time, or burn up as extra speed. Either way, I'd prefer one with about as long flights, possably a little longer, and a slightly shorter charge. That's the slow part. Looked into an rc boat motor, figuring it'd be a nice thing if I ever wanted to do the pontoon mod for some reason. (not like I have a pool...)

 

Personally, I find mine to work much better without that spring, but it's preference. (My advice from removing the spring from the newer ones, though, is to just not do it if you can't waste a controller, or can't solder the part you will probably break if you're not super lucky.)

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JMBishop
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November 30, 2011 - 12:30 am
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The 500 mah will work due to the amount of weight I've removed, I hope to remove more because adding the big battery will probably make it handle like it did out of the box again but with a much longer flight time.

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JMBishop
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December 5, 2011 - 2:51 pm
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Got the 200 mah today and put it in my swann, flies great except for the bent main rotor shaft which makes it vibrate a little. I will time the flight on it as soon as it's done charging. I will order a new rotor shaft soon and time it again.

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JMBishop
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December 5, 2011 - 3:06 pm
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Wahoo, 10 min flight time before it couldn't gain altitude!

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CPD
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December 6, 2011 - 12:19 am
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Sounds like 2 min for every 50 mah or so!

 

That's pretty good! I'm guessing that means the 500 would have about a 15-17 minute flight, simply because of the added weight making it exponentially decline.

 

How much longer did that take to charge?

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JMBishop
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December 9, 2011 - 6:36 pm
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I'll have to time the 200 mah charge time.

 

I got a 420 mah battery and installed it, now I've got good and bad news. The good is that it flies, the bad is that it is more unstable and flight time actually decrease vs the 200 mah, flight time was only 8 min due to the added weight. I'm guessing the optimal battery will be between 200 mah and 350 mah. More batteries are already ordered.

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CPD
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December 10, 2011 - 12:44 am
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Wow, wouldn't have expected it to have that much of an effect that early!

 

Keep us in tune! Great to see somebody putting this much effort into what everybody else probably thinks is stupid!

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JMBishop
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December 10, 2011 - 1:48 am
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I'm happy to do it, it's not expensive and once the information is out there it benefits anyone interested. The worst part is waiting on shipping from Hong Kong. 

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CPD
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December 10, 2011 - 3:35 am
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What's worse is that half of what comes from there never comes, for one reason or annother...

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JMBishop
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December 10, 2011 - 6:26 am
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I've done shipping and receiving before and know how to beat them up when I don't receive Items. The few that I had problems with I ended up getting for free, so far I've received everything I've ordered from Hong Kong. It's really easy to get your way on Ebay as a buyer. They feel like you've ruined them if you leave legitimate bad feedback but it has to be descriptive and valid.

I have more trouble with American sellers, I purchased a "new" latch for the sliding rear window on my dodge ram. The latch was new but the guy scratched the part #s off it with a hot knife. He want me to send him the latch and he will refund my money, it's funny how he will change his tune when the bad feedback hits. I'm expecting either a refund or a new latch without the part # scratched out. It's ridiculous for him to want me to leave my truck unsecured and find someone else to buy a latch from.

 

It's amazing how much leverage a "customer" has.

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CPD
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December 11, 2011 - 3:49 pm
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My mom ordered a replacement teapot lid from a guy who makes them in a factory that also makes high-end teapots for major companies, and also ordered two travel "Tea Buddy"'s... Got those, didn't get the lid. According to the little chineese guy, almost 50% of EVERYTHING he ships never reaches the US. He tries to do shipping insurance to cover it, but they all just get lost.

 

I don't remember the seller's ID, but they do absolutely BEAUTIFUL tea sets at a very reasonable price.

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