RE: MX450 XS Discussion Thread

RE: MX450 XS Discussion Thread
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RE: MX450 XS Discussion Thread - 4/24/2007 1:06:40 AM

osterizer

Posts: 1526
Joined: 3/10/2007
From: Sykesville, MD, USA
Status: offline

Darn, Tex, I have got to get more ambitious-- sounds like you're way ahead of me in "skilz!" Sucks to wreck though, sorry.

Sammy64, I flew mine loose for a little while, got the blades balanced, then flew them just tight enough to hold their position when stopping. I then held them carefully in place and clamped them down tight. A little fudging around to keep them symmetric to each other (as far as angle in the grip) and I've had them clamped since. In theory you're supposed to let them lead/lag like you do the mains, but as short as they are, in practice, I don't think it makes a lot of difference and I'm more comfortable with 10,000 RPM devices if the screws are tight.

(in reply to sammy64)

Post #: 226

RE: MX450 XS Discussion Thread - 4/24/2007 1:07:43 AM

[]TEX[]

Posts: 9431
Joined: 6/27/2006
From: Glencoe, IL, USA
Status: offline

quote:

ORIGINAL: sammy64

should the blades be lose in the grips as to fall when sitting ?? or should they hold there place

They should be tight enough to hold them in place, but loose enough that you can mov the blade with your fingertip without holding the shaft.

One thing you can do is spin it up and then hold the end of the tail, you can feel how much vibration is there and then decide if it needs to be taken care of.

_____________________________

T-Rex 600N Pro | T-Rex GF600E

(in reply to sammy64)

Post #: 227

RE: MX450 XS Discussion Thread - 4/24/2007 1:11:10 AM

[]TEX[]

Posts: 9431
Joined: 6/27/2006
From: Glencoe, IL, USA
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quote:

ORIGINAL: osterizer

Darn, Tex, I have got to get more ambitious-- sounds like you're way ahead of me in "skilz!" Sucks to wreck though, sorry.

Well, G3.5 is nice, but the real life heli just doesn;t react like the sim and it does wierd things when it wants to unless you are really on it. I wouldn't call it skills, I just like to try new stuff and realize that my actions will have repercussions.
I just wasn't paying enough attention.

Although it goes right over and sits on it's head easy.

Thanks Osterizer, it's just part of learning. I've crashed before and I'll crash again, just the way it is.

< Message edited by []TEX[] -- 4/24/2007 1:15:09 AM >

_____________________________

T-Rex 600N Pro | T-Rex GF600E

(in reply to osterizer)

Post #: 228

RE: MX450 XS Discussion Thread - 4/24/2007 1:16:30 AM

sammy64

Posts: 174
Joined: 1/27/2007
From: Garland, TX, USA
Status: offline

thanks for the heads up .. iam going to rebuild the tail again .. i have used trex parts last time and have a few extra .. seems like the shaft is lose and floats in the bearings just a very little .. i have gone thru the tail control arms and grips and now it time to pull the boom out ..

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Post #: 229

RE: MX450 XS Discussion Thread - 4/24/2007 2:25:44 AM

osterizer

Posts: 1526
Joined: 3/10/2007
From: Sykesville, MD, USA
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Ha, yeah, I know. I've beaten enough parts off the BCPP. I'm just in a mood-- I'm POed at the Blade and I smoked the motor in the King yesterday (literally-- looked like it was packed with Kentucky Burleigh) so the 450 is the only one running right now besides the FPs. RealFlight's the only place I can take chances

.

(in reply to []TEX[])

Post #: 230

RE: MX450 XS Discussion Thread - 4/24/2007 7:19:37 AM

Anthony.L

Posts: 16
Joined: 12/17/2003
From: Federal Way, WA, USA
Status: offline

Anyone else had issues with the quality of the alum main blade grips and alum tail rotor grips? Both on my 450XS are worthless. The tail rotor grips somehow cause a horrible vibration once the heli reach mid stick. The main blade grips are noticeable not straight when installed in the head. I can visually see one grip is pointing slightly down. This was straight out of the box and also after I went through it and checked everything. it makes the blades impossible to track.

I've ordered plastic pieces to see if it resolves the issues. Then I will be taking this up with Heli-Max for a fix. Just wanted to see if this is a isolated instance or more common?

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Post #: 231

RE: MX450 XS Discussion Thread - 4/24/2007 11:49:04 AM

sammy64

Posts: 174
Joined: 1/27/2007
From: Garland, TX, USA
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I have switched the tail with a Trex .. but i`m also going thru a vibration with the tail.. at about the same place 1/2 to 3/4 throttle ... feathering shaft is bent.. very easy to bend it .. there cheap to replace ..

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Post #: 232

RE: MX450 XS Discussion Thread - 4/24/2007 2:52:50 PM

[]TEX[]

Posts: 9431
Joined: 6/27/2006
From: Glencoe, IL, USA
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quote:

ORIGINAL: Anthony.L

Anyone else had issues with the quality of the alum main blade grips and alum tail rotor grips? Both on my 450XS are worthless. The tail rotor grips somehow cause a horrible vibration once the heli reach mid stick. The main blade grips are noticeable not straight when installed in the head. I can visually see one grip is pointing slightly down. This was straight out of the box and also after I went through it and checked everything. it makes the blades impossible to track.

I've ordered plastic pieces to see if it resolves the issues. Then I will be taking this up with Heli-Max for a fix. Just wanted to see if this is a isolated instance or more common?

Check the feathering spindle, might have been damage during shipping of some sort. The blade grips should be straight. The stock white blades are junk and cause alot of vibration. Upgrade to teh CF or Align tail blades.

Unfortunately, Helimax has back ordered the spindles until the end of May.

< Message edited by []TEX[] -- 4/24/2007 2:53:42 PM >

_____________________________

T-Rex 600N Pro | T-Rex GF600E

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Post #: 233

RE: MX450 XS Discussion Thread - 4/24/2007 6:06:20 PM

Anthony.L

Posts: 16
Joined: 12/17/2003
From: Federal Way, WA, USA
Status: offline

Thanks for the advice guys. I did disassemble the blade grips and checked the feathering shaft, it's perfectly straight.

I didn't want to believe the stock tail blades would be that much out of balance. I'll pick up some Trex tail blades and give those a try.

(in reply to []TEX[])

Post #: 234

RE: MX450 XS Discussion Thread - 4/25/2007 8:42:27 PM

sammy64

Posts: 174
Joined: 1/27/2007
From: Garland, TX, USA
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Pulled the Heli apart and rebuilt everything in the tall to get rid of the vibration .. new tail shaft (using the trex tail parts and grips in the HM housing) got it all back in shape and aligned and powered it on with no main blades or feather shaft .. just a little vibration from the stabilizer at full throttle .. finished reassembling the tail and balanced the tail blades (Align 3K CF).. the blade grips where lose .. just need a little force to move the blades in the grips now .. tested and the vibration was still very little on the stabilizer .. put the head back together and tested .. still just a little vibration .. put on a nice NEW balanced align 325 woodies and all of a sudden the dang thing has the vibration again .. swap out for a 315 woodies pair and the vibration normal again.
doing all this i was also able to fix the tail boom and my belt issue .. belt is almost center in the boom..

< Message edited by sammy64 -- 4/25/2007 9:14:55 PM >

(in reply to Anthony.L)

Post #: 235

RE: MX450 XS Discussion Thread - 4/25/2007 9:50:18 PM

[]TEX[]

Posts: 9431
Joined: 6/27/2006
From: Glencoe, IL, USA
Status: offline

quote:

ORIGINAL: sammy64

Pulled the Heli apart and rebuilt everything in the tall to get rid of the vibration .. new tail shaft (using the trex tail parts and grips in the HM housing) got it all back in shape and aligned and powered it on with no main blades or feather shaft .. just a little vibration from the stabilizer at full throttle .. finished reassembling the tail and balanced the tail blades (Align 3K CF).. the blade grips where lose .. just need a little force to move the blades in the grips now .. tested and the vibration was still very little on the stabilizer .. put the head back together and tested .. still just a little vibration .. put on a nice NEW balanced align 325 woodies and all of a sudden the dang thing has the vibration again .. swap out for a 315 woodies pair and the vibration normal again.
doing all this i was also able to fix the tail boom and my belt issue .. belt is almost center in the boom..

what motor and pinion combo are you using?

_____________________________

T-Rex 600N Pro | T-Rex GF600E

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Post #: 236

RE: MX450 XS Discussion Thread - 4/25/2007 10:52:22 PM

osterizer

Posts: 1526
Joined: 3/10/2007
From: Sykesville, MD, USA
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And are you sure the 325s were balanced? If putting them on meant really bad vibes, and the 315s fixed it, all I can surmise is a) they're not balanced, b) one or both or warped (which would show up in bad tracking in addition to vibration), or c) maybe the 325s were sticking on the grip hinge (something rough, bolt tension off, something like that).

(in reply to []TEX[])

Post #: 237

RE: MX450 XS Discussion Thread - 4/25/2007 11:13:13 PM

sammy64

Posts: 174
Joined: 1/27/2007
From: Garland, TX, USA
Status: offline

TEX .. the motor is a GP-Ammo 28-45-2700 .. the one they recommend and using the stock 14T .. align 35A ESC .. i have also noticed that the motor gets hot after a battery .. the ESC is kool to the touch ..

osterizer .. i balanced the blades myself along with the 315's .. align blades are good right out of the package most of the time .. now the tail blades where off a lot and took 2 strips of tape to get them balanced .. i can get the 325's to track into about 1/8" .. but under hard throttle that changes .. maybe a 1/4" or so .. i bought two sets of the 325's (LHS about 1 hr away, so i buy a lot of everything when i go) and try the other ones to see if it is just a bad set of blades .. there cheap anyways

Thanks for your help guys

(in reply to osterizer)

Post #: 238

RE: MX450 XS Discussion Thread - 4/25/2007 11:36:45 PM