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01-09-2006 08:36 PM  13 years ago
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GAPwmu

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Cincinnati Ohio

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Trex head
Now I know there are a lot of forums that discuss the trex and ark and what is compatible and what not. But I have a question hopefully someone can answer. I already have the ccpm swash plate for my x400. Can I put all the trex head components on? All components being all the parts above the swash plate, Or would I need to change swash plate as well.

Im trying to decide whether to advance to the trex head or keep the stock set up. Either way, I need a new head since mine blew apart. Any help would be greatly appreciated. Thanks

Greg
It's only rocket science.
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01-09-2006 08:54 PM  13 years ago
trains35

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QUEENSLAND AUSTRALIA

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Yes Mate
I have done it on mine and everything fits perfect and flys great .
The only x400 i am using is the blade grips and blades .
Hope this helps
Andrew
QLD Australia
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01-09-2006 08:55 PM  13 years ago
trains35

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QUEENSLAND AUSTRALIA

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sorry
x400 parts
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01-09-2006 10:15 PM  13 years ago
GAPwmu

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Cincinnati Ohio

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I also have another question. I added the trex long boom and belt to the heli. Boom and everything fits great. However, in order for me to have the acceptable belt tension, I have the boom nearly out of the second boom support. Anyone done this modification, and if so, how are you setting the belt tension? Using a different belt besides the align(upgrade) belt?

Greg
It's only rocket science.
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01-10-2006 10:53 AM  13 years ago
enginetorque

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North Wales

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adVANCE?
"Advance" to the Trex head???????? - surely this would be a retrograde step?
two pumps and a squirt
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01-10-2006 06:42 PM  13 years ago
GAPwmu

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Cincinnati Ohio

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The only reason I say advance is because I hear the cyclic is much faster in response.

Greg
It's only rocket science.
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01-10-2006 08:46 PM  13 years ago
BoneDoc

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San Antonio, TX

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I thought TRex cyclic is faster because X400's flybar weights are too heavy
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01-12-2006 03:59 AM  13 years ago
Squirrlybird

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Suffolk, Va US

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The trex flybar fits in the x400 meaning that all you need is the trex flybar and paddles. Worked great for me. I would also upgrade the center hub to cnc. You will break less stuff in crashes.
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01-13-2006 01:14 PM  13 years ago
enginetorque

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North Wales

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ah well
Now now Squirrely - aircraft should be engineered to FLY - not to crash...........
two pumps and a squirt
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01-13-2006 11:35 PM  13 years ago
Squirrlybird

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Suffolk, Va US

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If your not crashing then you arent flying hard enough

All jokes aside, the plastic center hub really is a weak link. Some have reported it failing in flight.
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01-30-2006 07:19 AM  13 years ago
majorsmackdown

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Portland, OR

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the x400 head is crap, I had lots of problems with it holding together, about 1 mm of screw threads hold the see saw in the head block, that strips and is toast, so you order the alum seesaw and find out you need the whole alum full rotor set cuz the alum seesaw is longer. for about 60 bucks, the money is better spent on a plastic trex head than x400 bling upgrades that still are sloppy - the trex head is definitely and upgrade. I put my trex plastic head on my x400 and will never turn back, plus you get to use trex rotor blades without screwing with spacers, the trex blades are more plentiful, more variety, cheaper etc. Go trex head if you have an x400, go trex total chopper if you don't have a heli yet... also the alum frame is sweet looking, but if you kablang it, it bends and doesn't have the resilience of the carbon or plastic trex frame. also the t-rex tail rotor and pitch slider are much better than the x400. Sorry to say - trex all the way. (I have had 3 x400's). I just spent all day today working on a buddy of mines x400 and the sloppy head to get it to track blades properly. Did I say already - Go TREX !!
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01-30-2006 07:55 AM  13 years ago
BoneDoc

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San Antonio, TX

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if you're so unhappy with yours, how come you had 3? . I guess most of us are gluttons for punishment.**If you ain't crashing, you ain't flying hard enough**
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01-30-2006 11:40 AM  13 years ago
majorsmackdown

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Portland, OR

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Glutton for punishment. Yeah. but I still stand behind my analysis, and would like to prevent others from falling prey as I did. I don't mind elaborating though.

I also read that the x400 would be easier to fly for a beginner - I read this after starting the trex build. And as a noob I was concerned maybe I got the wrong heli... I found them to both be very similar for hovering - 3d I never did with the x400 head, but the trex of course does whatever you can make it do. latest model trex ccpm is what I have.

so why did I have 3 ?

I was attracted to this one because it was an ARF. I had a bunch of time in the build of the trex I started building and was afraid of crashing it and having to do all that work again, so my LHS had a few of these mx400's and they were ARF and reasonably priced. I knew I could crash one and replace it fairly. So I bought one, had glitches I couldn't track down and had a couple crashes that broke a bunch of parts in the head. The LHS didn't have spare parts yet, so I just got another ARF, and meanwhile ordered some parts from tower, and said what the heck, got another ARF from them too. I got a bunch of spares figuring that (me being brand new to helis) I would have a bunch of hard crashes in the near future, but I was determined to learn to fly helis. The original crashes were due to strong glitches that were 100% solved when I got the futaba mini PCM receiver on board - now I will never go without a PCM receiver again in a heli. So I'm on my second one. This one doesn't have any crashes or anything of the sort, but the head has a bunch of vibration in it. The dang screws that go into the seesaw are not holing, I tried some other way of fastening without any luck. I could see that about 1mm of threads were supposed to hold it together - well of course not. I'm a little frustrated by now, and I see my half built trex sitting here and says to myself hmmm, would that head go on this heli and sure enough it does. I put everything above the swash onto the x400 and at the same time upgraded to the ccpm kit I got from tower. So anyways, I'm still flying and loving this chopper, but it's an x400 with the ccpm upgrade and a complete trex head. (latest version). It's very sweet this way, and crap the other way. I ended up using the trex pitch slider as well, that's a good improvement (say upgrade) too. It's a sweet heli now, but it should be a t-rex in the first place. It's silly to buy an x400 and then spend the bucks on a trex head. After getting the trex head on her I got to do a lot of flying and very little tinkering - I realized I could do without my extra x400's - knock on wood haven't had any pilot error crashes yet. So I sold my spare ARF to a buddy of mine with all the spare parts to keep her going - since trex parts are easier to get locally - he got all the x400 spare parts, and got him the alum seesaw too thinking that would be the fix for the screws/seesaw problem. Well after the first flight his chopper goes down hard. He rebuilds it with the spares and has the head vibration. He inadvertantly strips the plastic seesaw also come to find out the alum seesaw is longer and needs the full rotor set - so a few weeks pass and the full rotor set comes - he builds it up and it runs fairly smoothly but the dang blades won't track. I've looked it over and to the best of my ability it looks like it should be good to go after making some adjustments and correcting some errors - but dang thing wont' track blades. The blades we were using were trex blades with spacers. I thought maybe the spares were an issue (dumbfounded), and swapped out the x400 grips for some trex grips. Still can't track blades. I've had 2 gas choppers and 5 electrics by now and never had this problem. I stick my trex head on this heli and she runs fine, but the x400 bling alum head still won't track blades. Good grief, I've had enough - I will recommend anyone who wants more pleasure than pain, just get a trex to begin with.
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01-30-2006 01:50 PM  13 years ago
BoneDoc

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San Antonio, TX

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Since you've had gas chopper, then I'll assume that you are familiar with the setup of a chopper. I find that my x400 head does not really shake at all. At least not at the level that you're bringing up. At hovering rpm, it simply has a slight gentle vibration, which doesn't seem to affect the performance and tracking. I am still relatively new at this, so take it with whatever grain of salt you want . I did have the ccpm upgrade with a metal swash from the get go.**If you ain't crashing, you ain't flying hard enough**
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01-30-2006 03:53 PM  13 years ago
majorsmackdown

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Portland, OR

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I have a feeling the extra precision in the metal swash you had from the get go could have saved you some headaches. If you ever have the seesaw apart you'll see what I mean - the screws into it are inadequate. gas choppers came after the sorting out of the x400 for me, and I'm pretty comfortable with setting up a heli at this time - and haven't had any problems with any of the other helis I've had. There's a chance some of these x400's have proper screws for the seesaw, or if they were cautious during assembly not to strip the seesaw things might be ok. I'm guessing hit and miss from what I've read here. but just simply in the design and execution the trex head is much more user friendly and a better design. My buddy's plastic x400 swash had a ton of play in it after very little run time, I think part of this comes from the vibration caused by the bad seesaw setup. I'm new to all this myself as well. My first chopper was a blade cp 3 months ago. I've seen a lot of helis in the meantime and really would go trex over x400 for several reasons I've stated. Nothing personal - and I don't see it as a ford/chevy thing either.. my regular flyer is an x400 with the trex head. (also the trex canopy gives more room for the battery.
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02-02-2006 12:31 PM  13 years ago
rallinen

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Corsicana, Texas

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TRex Head
It can become confusing with all of the parts and differences. My question is the Trex head upgrade vs the MX400 aluminum head upgrade. Looking at these sites and pictures the two parts look the same. Are they and if not how do you tell the differences?
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02-08-2006 04:00 AM  13 years ago
Nugz

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N.J.

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go w/ trex parts they'll be cheaper in the long runMFD
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02-08-2006 12:40 PM  13 years ago
BoneDoc

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San Antonio, TX

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I just got the new SE, and I can tell you that the head and tail feels and look so much better. Super smooth with much less slop.**If you ain't crashing, you ain't flying hard enough**
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