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Ron’s HeliProz South . Century Helicopter . RC-Direct

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e-Ark X-400 - MX400 > wag with new mx450xs
 
 
whattheheli
Heliman
Location: lansing mi usa

My new mx450xs looks beautiful !! but when test flying it i notice that it has a slow , short but constant wag to the tail . and when i gave it a sharp tail input it started a larger more violent wag i sat it down adjusted the gyro gain down and test hovered it again and it was still showing signs of a small slow wag !

would i be correct is saying that a slightly stiff tail setup and a tail servo that does not quite have the umph !! im currently running a ds285 on the tail and i am thinking that maybe putting the hs81 and changing the tail shaft to a smoother align shaft may help the issue ?? anyone have any input ?? i will post a video on here in a few minutes that will let you see kinda what its doing !



http://www.youtube.com/watch?v=Sb6W3DWtLRQ

Crashing SUCKS !!!!!
12-27-2007 02:02 AM
 
 
flylow123
Heliman
Location: Longview, Texas

Tail Wag

If you find out please let me know. I have flown an MX400 for about a year. Flew good, but I could never ever get the blades to track. Did have some tail wag. Learned to live with it. In November I decided to buy a new MX450 to hopefully fix the blade tracking issue and tail wag. Imagine my surprise when the tail wag is worse and as usual I cannot track the blades. I am so frustrated with the thing that I feel like throwing it as far as I can. I should have gone with a t-rex. Let me know what you find out.
12-27-2007 03:41 AM
 
 
whattheheli
Heliman
Location: lansing mi usa

for blade tracking i think going with the align blade grips and align feathering shaft i had an mx400 before i got the mx450 and the align blade grips and feathering shaft helped me !

Crashing SUCKS !!!!!
12-27-2007 04:00 AM
 
 
druski2007
Heliman
Location: Alvarado Tx.

what gyro and radio r u using depening on what u have u may need to adjust it some in the radio i might be able to help more if i know what u have i fly a mx400 and it flys as good as a t-rex 1 thing that will help is install the blade grips and pitch slider on it from a v2 t-rex the cost is about 34.00 the one that comes with the mx400-450 SUCKS let me know if i can help more there r some other things u can do that make a 100% difrence in the heli i will share lol

What goes up,Must come down
12-27-2007 05:17 AM
 
 
whattheheli
Heliman
Location: lansing mi usa

i am running the logictech 2100t gyrow/ ds285 on the tail and a DX7 as soon as i can afford it im going to get cnc trex blade grips and i wanna make the tail all cnc i hate the little bits of plastic they use ! drives me mad! lol share you info with me all you can i need the help with this thing lol thanks

Crashing SUCKS !!!!!
12-27-2007 05:41 AM
 
 
binkyandbrain
Heliman
Location: cosby TN unitedstates

I put align 325's on my MX450 helimax blades suck you can't track them.And then mount your tail servo on the boom and your problems will be solved or at least mine were.Good luck
12-27-2007 02:54 PM
 
 
Way2slow
Veteran
Location: Jeffersonville Ga

I'm glad somebody has a 400 that flies good. The one I have is a long way from flying like anything that flies good. It does fly better since I took the plastic head off, which by the way, I don't think it is possible to get the blades to track with that plastic head, and put the metal head off my MX450 on it.

As for the tail wag. The control rod must be silky smooth. When I had the red aluminum tail on mine the slider for the pitch control didn't slide smooth, I had to 400 grit sand paper around the round part of the shaft of my small hex drivers and smooth it out and polished the shaft some. The ball ends fit tight also and had to make them fit a looser. I also did away with the frame mounted servo and boom mounted one. Finding a good, fast 9g servo that will fit in that hole was something I couldn't do. Also the 9g servo's don't have the power to overcome anything that's creating a drag in the tail control system. I'm running a 401 gyro and until a couple of hours ago was running the S9257 servo. Just for the hell of it, I installed a GWS Park HPXF. This is a very cheap, very fast servo and I just wanted to see how it works. The dam thing actually worked very good for the 20 minutes I flew it. I also run the longest arm I can get to clear. Longer arms take a good servo but hold much better because the servo doesn't have to make as much correction movement, therefore can correct quicker. I'm going to put the GWS servo on the 400 when I do the ccpm conversion on it now that I see it actually works much better than I figured it would for the price.

I see you have a lot of the frozen, white rain on the ground. I've read many of the gyro's are very temp sensitive, let it sit out for a little while to acclimate and see how it does.
12-30-2007 05:32 AM
 
 
druski2007
Heliman
Location: Alvarado Tx.

one of the bigest problems with the mx400 is the slop in the head were the head goes on the main shaft the bolt in it is a 1.5 mm dill the head and the main shaft with a #41 or 42 drill bit and install a 3.0mm nut and bold and tighen it up all the slop will go away the second is the fly bar mixing arms use bushings get the upgrade center for the head with bearings it is about 14.00-20.00 = shipping it will fly sweet

What goes up,Must come down
01-01-2008 03:02 AM
 
 
hawkkw
Heliman
Location: Salem, Va

Tail Wags

It looks like your tail is hunting and you won't be
able to dial it in because the tail slider is binding.
The ball ends on the tail grips also need to be toward
the leading egde of the blades. I ended up buying a
Micro-Heli tail assy. and between it and my 401 it's
dead steady now but I could never get the gyro gain
right until I bought a descent tail. I'm also using a
9650 servo(very nice) with a carbon fiber push rod.
Music wire won't work for the rudder.
01-05-2008 09:33 PM
 
 
gwong
Senior Heliman
Location: Langley, British Columbia, Canada

My MX had a tail wag problem and I upgraded to the microheli all metal tail and the wag went away. BTW I am using a 9650 and GY401.

Cheers,

Gord.

The worst day at the field beats the best day at the office
01-12-2008 04:29 AM
 
 
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MTA Hobbies . MRC/Altech Marketing USA . MaxAmps.com

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e-Ark X-400 - MX400 > wag with new mx450xs
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