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Home✈️Aircraft🚁Helicoptere-Elec-Helicopters New or Limited ActivityArk › What to buy MX400 or TREX
01-16-2006 01:17 AM  13 years ago
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Anderman

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Thornton, CO

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What to buy MX400 or TREX
I was wanting to get one of these electric helis I have a raptor 60 now but I am getting burnt out of traveling to the flying fields I thought if got one of these the park could become my new field. Any thoughts or suggestions on what to buy? I would like to keep the price around $400 but I want qaulity. I was looking at the blade but that looks pretty cheap and real fun to fly. Thanks for the feedback. Also is it necassary to use the 401 gyro or will any HH gyro work?
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01-16-2006 01:39 AM  13 years ago
RC-J

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Lexington Ky

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I'm running a telebee hh gyro and it works fine. I've also had a JR500T in it too.

I'm running the MX400 with the ccpm conversion, aluminum head, stabilizer, "pro" head converion, tail mounted servo, and some other carbon bits here and there. In my opinion the MX400 is a real nice heli with plenty of cyclic/collective throws and little to no slop in the configuration that I have done. The CCPM and aluminum head are the two pieces that helped the most.

I've had the Blade CP and it is fun for hovering in the back yard but that is about it (IMO). The lack of tail rotor authority with just the piezo gyro didn't make it as much fun to fly as my mx400 so I sold it.

I went with the MX400 over the trex because that is what my LHS stocks for parts. If I didn't have a LHS helping me out then I probably would have went with the TREX because it has such a large support group and was more proven/developed.
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01-16-2006 02:34 AM  13 years ago
Anderman

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Thornton, CO

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Hey thanks for the insight I need to go the LHS and see what they have in stock. I have been use to always ordering parts for my raptor from heliproz as you seem to always get better deal.
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01-16-2006 04:20 AM  13 years ago
BoneDoc

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San Antonio, TX

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Go to RCGroups.com and serarch for matrix mimi. He sells X400 for a really good price. I've been getting all my stuff from him.**If you ain't crashing, you ain't flying hard enough**
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01-16-2006 05:20 AM  13 years ago
Squirrlybird

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Suffolk, Va US

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They are essentially the same helicopter. If you look at x400tuning.com, there is a great comparison.

The x400 has a slower cyclic response but that is easily fixed by dropping in the Trex flybar and paddles (some are happier with the x400 paddles).

Go with whatever will give you the best support. CHECK THE SWASH on either heli. Look at the top subject on the Trex forum. Both helis have this swashplate issue. Good Luck.
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01-18-2006 11:54 PM  13 years ago
Bohnhead

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Watertown,SD. USA

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mx or t-rex
I have a MX400ccpm with every upgrade except metal main blade grips, and metal tail slider. It is flying with a Aon motor,and a Castle 25 ESC,and a Spectrum radio. It is one very smooooth heli. It tracks very well in forward flight. Heli-Max is coming out with the fully blinged version soon. I also have a built T-Rex SE. Waiting for a gyro to fly it. Both helis are very nice. I would recomend getting the one with the most product support in your area. Can't go wrong with either one of these machines. GOOD LUCK
Quick Charge,Fuel, and let's go Flying!!!
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01-19-2006 03:45 AM  13 years ago
Anderman

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Thornton, CO

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I bought the Trex. In the process of building still. Is that swash fix really needed? It seems very solid.
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01-19-2006 05:19 AM  13 years ago
Squirrlybird

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Suffolk, Va US

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Some people report no problems without doing the fix. Others swore that the swash was solid until a few flights later. It is totally up to you. If you feel comfortable then dont worry about it. Just know that the glue that align is using only holds for a period of time for some people. Others have had no problems.

Congradulations on your rex. I love my trex400!!!
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01-19-2006 01:39 PM  13 years ago
shackscs

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Willow Grove, PA - USA

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I tried the swash fix, but could not get the swash to seperate. I have not flown it yet, but after a couple of flights, I am going to give it another shot.

I know from what I have read that it is not a matter of if it will fail, but when it will fail.
Tiger 50
9CHP
Hirobo XRB
G2 Sim
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01-20-2006 03:33 PM  13 years ago
cadwarrior

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Canada

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I got a trex SE and did not modified the swash plate, had no problem with it, seams to be verry solid. I asked Jason Krause if he modified his swashplate, and he told me that he did not modified anything, and he's doing some hard 3D manoeuvers with it, even making touch the ground with his main rotor.

I really like the trex SE, easy to setup, no slope, hoover rock steady hands off and got plenty of power at anytime. And everything fit perfectly, no modification to do to the cockpit or else. After little trim at my first flight, it hoover perfect and can land verry easy in a 12" circle, easy to control.

I built the X-400 with my friend and there is a big difference between the X-400 and Trex SE. We had to work harder to make fit everything, the cockpit touch the controls and needs custom fit. the tail pitch system is not really good compare to the trex. the arm that push and pull on the tail blade holder is one molded parts, so it has a resistance when hes close to the boom.

Personnaly I prefer the TRex SE (for sure it is more expensive)and with the 120 degree eccpm control system it really easier to setup and got less mechanical parts. But this is a personnal choice.

other thing, get a good gyro and tail servo is key to success. Cheep gyro and tail servo is harder to setup and you got less control on the machine.

So if you can try both machine, you will be able to make your choise easily. I tried both and I prefer at 300% the Trex SE.
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01-22-2006 03:39 AM  13 years ago
bjacks

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Ft. Worth, Tex.

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X-400, T-Rex SE
I guess I miss something, you put a $150..00 helicopter up to a $500.00 helicopter, is this right or did I miss something. Bobby
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01-22-2006 05:27 AM  13 years ago
GAPwmu

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Cincinnati Ohio

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I have the x-400 and if flies great. Yes, I have done some things to it such as longer boom and the ccpm head. But before I did that, the bird flew just fine. I built mine without any problems either. Everything fit perfectly. I did have the swash come apart on a flight, and fortunately the only thing damaged were the blades. Obviously the canopy has to be trimmed, and there is really nothing to trim a plastic canopy. Even if I had to do it over again, I would still have bought the ark. I am happy with it.

greg
It's only rocket science.
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01-22-2006 03:12 PM  13 years ago
RC-J

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Lexington Ky

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My MX400 is no where near stock and it flies nicely. During my first test/hover flight I had a gyro issue and crashed it from a couple feet up. The head needed replacement so I went with the ccpm conversion right away. Now it is pretty much all aluminum has a tail mounted servo.

One complaint that I do have is that the stock blades are very light. They loose a lot of head speed when trying simple 3d like flips and rolls. I'm flying the JGF 450TH motor with 15c Kokam batteries so I don't think it is a lack of power. My next modification is going to be some heavier/carbon blades and a longer tailboom.
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01-22-2006 03:26 PM  13 years ago
BoneDoc

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San Antonio, TX

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Greg,

Does it fly better with a longer boom? Is it carbon / alum? My X400 was already a tad tail heavy stock, so I wonder if using a longer boom will make it a lot tail heavy.
**If you ain't crashing, you ain't flying hard enough**
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01-23-2006 03:06 AM  13 years ago
GAPwmu

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Cincinnati Ohio

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I didn't get to fly it very long with the longer boom. It did seem a lot more stable hovering, especially in the wind. The boom is aluminum. I heard people were having a resonance issue with the carbon, so I thought i would avoid that headache. The boom I installed is the align aluminum boom for the trex xl. It is 347mm. The ark long boom is 345mm. I just chose the trex boom because the store I buy parts out of carries that in stock. As far as being tail heavy I haven't had a problem. Even with the boom mounted servo I was able to keep it balancing by arranging my battery, which is the Cellpro 2000mah. I have more room to play balancing wise since I am using the ccpm frame as well.

greg
It's only rocket science.
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