Mini 3D DragonFly King Version 2 Helicopter $37.95 shipped

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Kostya17

Senior member
Jun 26, 2001
348
0
71
Got the same model from the Geeks--was able to fly it only after reducing the tailweight (chopped the guard ring off the rear prop). I could fly it similar to video they show online (I guess they made a dosen attempts and picked-up the best one); however, one of the engines died after a week of flying. Returned for a refund (no hard crashes--they accepted it).

My $0.02: stick with RC planes, they are much easier to fly ;-)
 

commOdog

Golden Member
Oct 9, 1999
1,687
0
0
Nitroplanes.com just sent me an email saying they issued me a full refund to my CC.

Thank You nitroplanes
 

Unheard

Diamond Member
Jan 5, 2003
3,773
9
81
These guys use LiPo batteries which can be touchy. If you notice any sort of bulge to your battery immediately dispose of it. Also, do not go from flight to charge. Wait til the battery cools down before putting it in on the charger. I fly the nicer version of these guys (CoCo Lama), and also a fully 3d collective pitch model (Honey Bee King), both of which use LiPos. If you are careful with how you treat the batteries, you should have no problems at all.
 

DLBlank

Senior member
Jun 28, 2005
509
0
0
Originally posted by: Unheard
These guys use LiPo batteries which can be touchy. If you notice any sort of bulge to your battery immediately dispose of it. Also, do not go from flight to charge. Wait til the battery cools down before putting it in on the charger. I fly the nicer version of these guys (CoCo Lama), and also a fully 3d collective pitch model (Honey Bee King), both of which use LiPos. If you are careful with how you treat the batteries, you should have no problems at all.

I was about to ask if it has lipos, Seams really cheap for musch anything with lipo cells...

But yeah but if they are they can just burst into flames from over chargeing, chargeing to fast, getting to hot, or letting the battery run down under a certan voltage, amoung other things...
 

jma007

Member
May 27, 2003
79
0
0
commOdog,
I went to nitro planes shop and got 2 at different frequencies and they fly great and my friends love it.

This is not really a toy and it's more like a hobby product and requires special attention.
This uses lipo batteries which is the best battery out there but it's very unstable. It's new technology and lipo batteries doesn't loose it's charge overtime unlike Nickle Metal batteries.

NEVER change a lipo unattended!!!!

LIPO batteries caught on fire because you have short circuited it. I'm thinking you must had a crash and loosen up the wiring inside. Or you might reversed the charger plug and plugged into the helicopter.

I think this helicopter is a great deal and fun per $ spent is high and I have no problem at all.
 

jma007

Member
May 27, 2003
79
0
0
Originally posted by: Unheard
These guys use LiPo batteries which can be touchy. If you notice any sort of bulge to your battery immediately dispose of it. Also, do not go from flight to charge. Wait til the battery cools down before putting it in on the charger. I fly the nicer version of these guys (CoCo Lama), and also a fully 3d collective pitch model (Honey Bee King), both of which use LiPos. If you are careful with how you treat the batteries, you should have no problems at all.

Lipo is used because it's necessary to make the helicopter like and lift off.
 

commOdog

Golden Member
Oct 9, 1999
1,687
0
0
it must have been from flying it and then charging it.

It ran until it wouldn't lift off anymore and then i plugged it in to charge.

I didn't reverse the plug as it only fits on one way.

You would think they would put a fused link or charge limiter or something in the charger to avoid the batteries from exploding.

Just for safety reasons for Gods sake.

Here is a video of a lipo battery catching fire:

http://video.google.com/videoplay?docid=3690260570423705609
 

commOdog

Golden Member
Oct 9, 1999
1,687
0
0
lipo info:

http://www.utahflyers.org/ has 3 videos about the dangers of lipo batteries

Serious Safety Issues
If LiPo batteries are improperly charged they can cause an explosive fireball. Our staff recently tested the effect of improperly charging LiPo cells and the results were dramatic! We cannot over-emphasize the importance of using a charger specifically designed to charge LiPo batteries, and to be positive that the manual cell count (if the charger has one) is correctly set for the specific battery being charged. If you use a good quality LiPo charger, these batteries are totally safe.


LiPo Do's and Don'ts
Do: Only use a charger that is specifically designed to charge LiPo batteries. Using other types of chargers can cause an extreme fire hazard!


Do: LiPos don't develop memory or voltage depression characteristics like Ni-Cds. Do charge them without the worry of cycling or discharging them.


Do: Store LiPos at least partially charged. LiPos will maintain their performance levels over time, even during non-use, much better than Ni-Cds and there's no need to cycle them.


Don't: Use any type of charger that is not specifically designed to charge LiPo batteries. Using non-LiPo-specific chargers can cause an extreme fire hazard!


Don't: Fully discharge your LiPo battery pack. Most speed controller have a voltage cut off that will prevent over-discharging the battery. Discharging a LiPo beyond it's critical minimum voltage will cause damage to the battery.


Don't: If you have a crash and the battery is damaged, don't put the battery in your car or house immediately after a crash. It's possible that a chemical reaction can take place in the damaged battery that could cause a fire. Put the battery in a safe place for a least one hour.


 

bigbangtech

Senior member
Mar 9, 2003
280
0
0
I just got the heli yesterday, and it wasn't that easy to fly at first.

Here are some tips and tweaks for people that actually like their $30 heli, like I do!

Resolder the steering pot if left/right is reversed.
When I first tried the dragonfly, it would turn left when I moved the stick right. If anyone else has this problem, it can be confusing if you were expecting this thing to work straight out of the box.

Remove the battery and antenna from the radio controller(not on heli). Unscrew the radio controller case and locate the rheostat that is connected to the left/right motion of the steering stick. Carefully remove any hot glue, and carefully unsolder and reverse the capacitor and wires.

So originally it's (red-wire & capacitor-leg1 to terminal one), (black-wire & capacitor-leg2 to terminal 2) and (capacitor-leg2 extends to terminal 3)

You want to reverse it to (capacitor-leg2 extends to terminal 1), (black-wire & capacitor-leg2 to terminal 2) and (red-wire & capacitor-leg1 to terminal 3)

Make sure the heli has 3 feet of room in any direction.
More like 5 feet I'd say, otherwise the heli will just suck into a wall or ceiling while you're trying to learn.

Trim the left/right controls to stop spinning
Find a room with at least 5 feet in any direction away from a wall to prevent having the heli suck towards a wall. Quickly start hovering and adjust the trim left or right until you are for the most part not turning left or right (it's not perfect, what do you expect for $30! :Q

Add weight to the front
If your dragonfly refuses to fly forward, add tiny amounts of hot glue to the bottom front of the cockpit until it gets easier to fly forward. You don't want too much weight, otherwise it will just zoom forward uncontrollably.

Anyone else enjoy this little sucker?
 

TitanDiddly

Guest
Dec 8, 2003
12,696
1
0
I used Lithium Polymer batteries in some of my robots. They are dangerous if handled improperly or charged improperly. Let me tell you something: A decent Lipo charger ALONE costs more than this whole helicopter- there is no way that a charger included with this plane has the proper safety features. If you must buy this (and I highly reccomend against it) charge it in a pyrex baking dish, which is fireproof. NEVER EVER EVER leave it charging unattended! They ARE NOT KIDDING when they say this in the manual- people have had houses, cars, and sheds burn down because they walked away. If your battery gets hot(warm is okay), it's gone. If it puffs up or bloats, it's gone. Do NOT try to charge it in either of these states, it will almost surely cause a fire. These batteries need a lot more refinement before they can be put into entry-level toys. They do not handle abuse at all. As they are now, it's dangerous and any company doing it is taking a major lawsuit risk.

Do not buy this toy. It's cheap for a reason.

If you already own it, be extremely careful, charge it in a fireproof container, and don't let it get hot. If you are in doubt, don't use/charge it. Never allow it to get any more than warm.
 

commOdog

Golden Member
Oct 9, 1999
1,687
0
0
Anyone else enjoy this little sucker?

I enjoyed it for 2 flights, right before it almost burned my house down.

given the opportunity again, i would charge it outside, inside a cinder block

the charger would never come in my house
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
48,518
5,340
136
Haha this little sucker is awesome! Mine just came in today. It's WAY smaller than I thought! Here's a short runthrough based on my experieces today:

Unpacking/assembly instructions:
1. Screw the antenna into the transmitter and pop the 9V battery into the back (make sure it's oriented correctly, there are markings for which way it goes). My antenna had some tape goop on it, so make sure to clean that off if you don't want it to be sticky.
2. The helicopter is secured to the foam by two pieces of tape. Don't just try to yank it out, carefully unpeel the tape (I bent the corner foam pieces down so I could undo them) and then lift the helicopter out.

That's it for unpacking and assembly, pretty easy. Nothing to even put together on the helicopter.

Initial setup and training:
1. Turn the transmitter on, then the helicopter (never turn the helicopter on first!). A red LED will light up on both units after powering each one up.
2. "Prime" the chopper for 3 seconds by rapidly pushing the throttle to max (left trigger) and then pulling it back down (according to the instructions).
3. Make your helicopter go up then down: push the throttle (left trigger) all the way up. Don't push it up slowly or just a little bit because it will tip over (again, according to instructions). Push it all the way up and it will shoot straight up. SLOWLY lower the thottle a little bit until it hovers. If you get caught up in the moment and it starts going towards the ceiling and you panic and pull the throttle all the way down, it will drop like a stone. If you go less than about 3/4 of the way from the top it will slowly decend. Just play with it. It's definately more of an art than a science. (Note: you CAN get it to hover pretty stably after you trim it, see the next step)
4. The helicopter's battery comes partially charged from the factory for you to tweak stability. There is a trim button under the right trigger which lets you counterbalance the helicopter from spinning. I had to put it a few notches to the left to get it to stop spinning. I haven't been able to stop the spinning 100%, but it's not a big deal. Play with the trim until you get it fairly stable.
5. Practice turning (spinning) the chopper. For some reason mine seems backwards - with the nose facing away from me, pushing the steering trigger (right trigger) left makes it go right and right makes it go left. Somewhat counter-intuitive, but maybe I got a mis-wired model - the instructions say it should go right when you push it right if the nose is facing away from you (as if you were in the pilot's seat). Weird but oh well. The key here is GENTLE movements of the stick. If you treat it like a video game and push it really fast right or left, it will spin like crazy (which is kind of fun ). Think of flying a chopper like giving it a gentle push with the wind - kind of like a boat but not even that precise with this particular model. edit: just saw bigbangtech's review, I'll resolder it tonight.
6. Once you have hovering and spinning mastered, try going forwards and backwards. Forward speed is pretty slow and it takes a couple charges to master, but it is possible. You need to give it some more throttle because making it go forward makes it drop in altitude. It's tricky because you have to juggle altitude and direction, which takes some practice. Also, because the blades are spinning, the chopper will tend to spin slowly in one direction or the other. You kind of have to tweak the steering controls so that it flies straight and hovers. It takes some practice. Rear flight is faster and seems a bit easier to control.

Additional tips:
1. It says not to fly it outside, but you can as long as it's not windy. There was a bit of a breeze outside and my Dragonfly went all over the place, so the manual is definately right on that count.
2. The manual also says not to fly it near large solid surfaces since it tends to get "sucked" into them (like a wall). Lack of currents/airflow/thermals/whatever, I guess. Also if you have the A/C on or a fan on it will affect stability
3. Battery life is 5 or 10 minutes, like 15 max before the battery starts wearing down. When it's done, it's done. It starts going a bit slower and then it just dies, flat out.
4. As far as exploding batteries go, I talked to my dad, who is an r/c buff, and he said to let it sit off for like 10 minutes before charging it. When you use it or discharge the battery, it gets hot, and when combined with the heat from charging it can cause problems. I don't know if that's the root cause of the other explosions, but it's a good safety precaution. It will be hard to do because you'll want to play with it again and a full charge takes like 30 minutes
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
48,518
5,340
136
Did some more flying - definately not an outdoor bird. It can go really high though I bounced it off a roof, tree, bushes, concrete, and it's still running strong. It seems as though the rings around the chopper's blades are designed to pop out if they're hit too hard, so rather than breaking they just pop out and you can push them back in. Very nice design! Another 10 minutes and I'll have another go
 

Kaido

Elite Member & Kitchen Overlord
Feb 14, 2004
48,518
5,340
136
Originally posted by: bigbangtech
I just got the heli yesterday, and it wasn't that easy to fly at first.

Here are some tips and tweaks for people that actually like their $30 heli, like I do!

Resolder the steering pot if left/right is reversed.
When I first tried the dragonfly, it would turn left when I moved the stick right. If anyone else has this problem, it can be confusing if you were expecting this thing to work straight out of the box.

Remove the battery and antenna from the radio controller(not on heli). Unscrew the radio controller case and locate the rheostat that is connected to the left/right motion of the steering stick. Carefully remove any hot glue, and carefully unsolder and reverse the capacitor and wires.

So originally it's (red-wire & capacitor-leg1 to terminal one), (black-wire & capacitor-leg2 to terminal 2) and (capacitor-leg2 extends to terminal 3)

You want to reverse it to (capacitor-leg2 extends to terminal 1), (black-wire & capacitor-leg2 to terminal 2) and (red-wire & capacitor-leg1 to terminal 3)

Make sure the heli has 3 feet of room in any direction.
More like 5 feet I'd say, otherwise the heli will just suck into a wall or ceiling while you're trying to learn.

Trim the left/right controls to stop spinning
Find a room with at least 5 feet in any direction away from a wall to prevent having the heli suck towards a wall. Quickly start hovering and adjust the trim left or right until you are for the most part not turning left or right (it's not perfect, what do you expect for $30! :Q

Add weight to the front
If your dragonfly refuses to fly forward, add tiny amounts of hot glue to the bottom front of the cockpit until it gets easier to fly forward. You don't want too much weight, otherwise it will just zoom forward uncontrollably.

Anyone else enjoy this little sucker?

Hey, thanks for the tip! I resoldered my transmitter today and it works correctly now. Except that I'm so used to flying it the "wrong" way I'm having trouble getting used to the right way :Q Seems a lot more responsive now, maybe I messed something up lol. Any tricks for getting the chopper re-balanced? I smashed it pretty good and now going full left with the trim tab only makes it rotate slowly rather than quickly.

And yeah, I'm definately enjoying this little monster Definately not for little kids but even 10+yo kids can get used to flying it within an afternoon.

 

cookj

Diamond Member
Feb 19, 2001
3,128
0
0
I got mine . It is fun, i've been waiting 10-20 minutes between charges since I got it. I also charge it in a fairly safe place and were I can watch it , just in case
 

commOdog

Golden Member
Oct 9, 1999
1,687
0
0
u BUNG bastards!
:thumbsup: :thumbsup:

btw, i have my banshee running in a pc i got in the garage
 
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