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Autography FlightPower . Advantage Hobby . Revolution Models

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e-Lite Machines Corona > Uncontollable bird
 
 
35Y IFTE
Heliman
Location: Helemano 7 miles south of N.Shore, Oahu Hawai'i

I have a few problems with taking off and the bird tends to spin like it has no tail rotor. I know that the gyro is used to control the tail pitch / speed, but dont know how to adjust it. I have a GWS - Micro Gyro that came with my corona 120. How does this thing work?

When it trys to take off it tends to tilt slightly forward and then wants to flip on its left side. I havent been off the ground yet because of this.

another thing. My battery is a Sanyo 7C NiMH 8.4V CP2600 that came with the kit. I want to get something else and was thinking about either 2S 1P 2080mAH Apogee 2 Cell Battery Pack but heard some bad things about it. I read in another forum that they purchased one and used it about 3 times before it wouldnt hold a charge any longer. They contacted Apogee and was sent a new one no charge. then about ten uses it wouldnt charge again. has anyone had a problem with this battery?

one last thing... Sorry I'm still kinda new... I was wondering if there was a good brushless motor I could buy for less than 70 bucks. I know its a long shot but I am on a buget.

There is NO Ejection Seat In A Heli !!
04-21-2005 Over year old.
 
 
rickyblaze
Senior Heliman
Location: Bloomington Indiana

I'm not familiar with the gws gyro you have but I guess you've tried to adjust the gain ?? I would give it a little more gain and if that did'nt work it might need to be reversed if it has a reverse switch . Check your manual for instructions on this you may have to remove and turn it over

I would leave the lipos alone for now. If your still trying to learn you want the extra weight of the nihm battery packs besides in a crash the lipo battery stands a good chance of getting damaged. As far as the brushless check the for sale forums and look for a deal there. A mega 16/15/3 with a castle creations cc35 or 45 is a great combo for the corona

Good luck, Rick
04-21-2005 Over year old.
HOMEPAGE  
 
 
35Y IFTE
Heliman
Location: Helemano 7 miles south of N.Shore, Oahu Hawai'i

hey thanx for the advice

There is NO Ejection Seat In A Heli !!
04-21-2005 Over year old.
 
 
gravity victim
Heliman
Location: artois Ca Us

uncontrollable

Turn the gyro upside down. Had the same problem with the same gyro
01-22-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

Toss the gyro. It has no business on outdoor helis like this. :P My advice would be to dig up a GY240 from somewhere. Its a biggy, but youll love it for every cent you spent on it.
04-29-2006 Over year old.
 
 
iceman3
Heliman
Location: Fredrikstad-Norway

Uncontrollable tail

Hi all.

I have got some of the same problems with the tail on my Corona. I have got a Align 400 gyro from a T-rex and a 7 cell 2600 sanyo pack on mine. I had some tail wiggling, so I turned the gain down till it stopped, but now it wants to turn the tail when I throttle up and am about to takeoff. As I am a newbie and nose in flying is not something I am skilled enough to do I feel a little intimidated to fly it again before the problem is gone. Any hints on what I can do to get it flying properly?
05-03-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

Thats what you get for flying a gyro with no Heading Hold I think. I really recomend a GY240, or if you have a fat wallet, a GY401. Ive seen coronas go on one of these, and they seemed rocksolid.

If that align gyro works just like a PG03, youll have reasonable hover and forward flight, but it doesnt handle burst of power at all. Sometimes even a full 180' turn around.
05-03-2006 Over year old.
 
 
iceman3
Heliman
Location: Fredrikstad-Norway

The Align 400 is a HH gyro. It is taken from a T-Rex that had it and it was working pretty good. On my Corona I only have a 4 channel Futaba receiver so it is in HH hold mode all the time. I really dont know what more to do with it.
05-03-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

Oh, that changes everything. :P If its got HH, then you might need to do something about delay and such.

Check out this guide:
http://ehbg.rchomepage.com/ehbg-12-doc.zip

It shows you what you need to set for a gyro on a corona.

Of all this fails, you might want to try stiffer heck blades.
05-04-2006 Over year old.
 
 
slowracing
Heliman
Location: Williamsburg, VA

Quote 
When it trys to take off it tends to tilt slightly forward and then wants to flip on its left side. I havent been off the ground yet because of this.

I thought the same thing when I started flying my Moth (also Fixed Pitch). It is something the FP Heli’s does, plain and simple. I think the key is to just pick the darn thing up off the ground. If you let it get to enough head-speed to almost pick it up it will start to lean and skid on you (at least that’s my experience). Sometimes you can’t give it enough cyclic to get it to level out again, I’m sure it has something to do with a gyroscopic and/or physic...either one is above me If you have the training gear on it just give it some juice and pick it up quickly (once the head-speed is up of coarse). If it gets a little wild set it back down. The main thing is don't panic and drop it.

Have fun,
Sonny
05-04-2006 Over year old.
 
 
iceman3
Heliman
Location: Fredrikstad-Norway

Slowracing

I think you are right about that you have to get it off the ground quickly. I have tried to throttle up nice and slow and the Corona dance around out of control just about when you have enough lift. As a newbee I tend to set it down and start over, but that way I dont get to fly??? I have to be tougher and throttle up fast, and maybe put in the BL Mega 16/15-3 motor I had waiting for when I am confident enough to get some more power.
05-04-2006 Over year old.
 
 
flypaper 2
Heliman
Location: Kingston Ont. Can.

I have the GWS gyro and it works fine. It's oriented so that the two adjustment screws are at the top and on the right. Trim it with rudder so it sits still just before lift off. If it wants to go forward, make sure it's not nose heavy. Should balance level when you pick it up by the rotor shaft. Pull el. trim back till it sits still. Same with left, right trim.
05-05-2006 Over year old.
 
 
iceman3
Heliman
Location: Fredrikstad-Norway

flypaper2

I have the Align gyro mounted on the right side but upside down. If I place it right side up the tail spins wild. The funny thing is that I have to adjust the tail all the time, from 10-15% positive right to +8% left input. I dont get it, it is not supposed to do this. I think I will try to buy a Futaba GY240 gyro instead of this and get to fly, instead of adjusting and loose control all the time trying to hover.
05-05-2006 Over year old.
 
 
flypaper 2
Heliman
Location: Kingston Ont. Can.

I don't think the gyro will stop it from changing trim. Sounds like loose linkage causing slop. Make sure the servo can't move and the pushrod to the tail can't flex. Twist the tail rotor blades and see if there is play in any of the linkages.
05-05-2006 Over year old.
 
 
iceman3
Heliman
Location: Fredrikstad-Norway

flypaper2

I have checked it for any slop in both the linkages, servo and the tailblades, but they are fine. I have tried to adjust the gain from about 0 to full and the only difference is when at 0 the heli spins round and round. At full it wiggles and at 50% it wiggles and it is pretty much uncontrollable. I think that this gyro is faulty and I need a new one. You dont know anyone that wants to sell a Futaba GY240???
05-05-2006 Over year old.
 
 
slowracing
Heliman
Location: Williamsburg, VA

Iceman,

If your radio supports the gyro feature do yourself a favor and look for a 401. You can pick one up for as little as $100.00 shipped (I've paid as little as $85.00 for a 401). A 240 will cost $85.00 shipped on the average. For the extra $15.00 to $20.00 changing the gain settings with the radio is a feature I wouldn't do without anymore

Sonny
05-06-2006 Over year old.
 
 
slowracing
Heliman
Location: Williamsburg, VA

BTW...make sure your C/G is spot on. If not it will cause the heli to skate more on take off. I just added the JR landing gear and put my pack on the bottom of the heli and now my C/G is dead nuts...it flies much better!!!!! I think the lower C/G helps also

Sonny
05-06-2006 Over year old.
 
 
Freakazoid
Heliman
Location: Roosendaal - The Netherlands.

Lowering the CG automaticly stabilises the heli, but also causes the cyclic to become more sluggish. :P With the plus you get a minus. Putting the batt up ontop near the rotor causes it to get seriously nimble. Mess around with some ducttape.
05-06-2006 Over year old.
 
 
iceman3
Heliman
Location: Fredrikstad-Norway

slowracing/freakazoid

Thanks for your input. The thing I dont understand is that the gyro do not react to the gain adjustments. Only when I turn it to 0% it spins wildly. If I adjust it to 10%-40%-70% it just do the same wiggle. Fast left/right and uncontrollable for a newbee like me. When I throttle up and just about clears the ground the tail behaves like wild and I have to put it down not to damage anything. I get very frustrated and I have double checked linkages/servo and tail blades and they are tight and almost slopless. The CG is 99% spot on just a tad noseheavy. I think this bad behaviour must have to do with the gyro so I am trying to buy a new one via this forum.
05-06-2006 Over year old.
 
 
slowracing
Heliman
Location: Williamsburg, VA

Iceman,

You are right; any heli is very hard to fly if the tail isn't locked. I tried to learn flying a Blade CP and could never get the tail to settle. Once I bought my Shogun and added the 401 it was a whole different ball game...You have to get the tail under control!!!!

With that said, let’s look at your setup.

Is the gyro duel rate...Rate and H.H. modes (I can not find info on the Align-400)?

Is your radio Gyro compactable (do you have a Gyro setting on it?)?

If the Gyro is duel rate is there a wire for controlling the gain with the radio?

Are you controlling gain with the radio or pot (from your previous posts I guess the pot!?!?)?

If you’re using the pot and there is a gain control wire on the Gyro is it plugged into the receiver?

If the gyro is duel rate and you are using the pot to control gain then the gain wire (if applicable) should not be plugged in. If this wire is plugged in the receiver only the transmitter will control gain, the pot although it might do something will do very little. This could be the reason you see no change in the tail when the gain is adjusted, the only difference you see is at either extreme.

If the gyro is duel rate and the pot controls the gain the setup should be like this

0-50% is rate mode.
50-100% is Head Hold mode, or possible visa-versa!?!?

All 100% of either mode is controlled by only 50% of the gain pot.

Example
50% gain is a 100% H.H. and/or Rate (sort of)
60% on the pot would be 80% gain in H.H. mode
70% on the pot would be 60% gain in H.H. mode
40% on the pot would be 80% Rate mode
30% on the pot would be 60% Rate mode, and so on.
I base this solely on my MS-44 Gyro instruction, and is just an example, yours could be opposite of this.

So check the things I mentioned and let us know what radio and gyro functions you have and witch ones are using and we’ll try to get you in the air ASAP

BTW...if you know all this info already please don’t take offence, I wrote this in a very basic manner just in case you might have missed something.

Regards,
Sonny
05-06-2006 Over year old.
 
 
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e-Lite Machines Corona > Uncontollable bird
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