RE: HeliMax MX400 CCPM heli "build" thread  
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    • All Forums >> RC Helicopters >> Electric RC Helis >> RE: HeliMax MX400 CCPM heli "build" thread
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    RE: HeliMax MX400 CCPM heli "build" thread - 12/3/2005 6:24:25 AM   
    aws23


     

    Posts: 41
    Joined: 5/27/2003
    From: Kansas, IL, USA
    Status: offline     		Joe

    Sounds like most of your setup is OK. I guess we need more opinions on motors. I think about everyone is a bit of a newcomer to the electric helis we are seeing now. I agree with bdavison on the position of the gyro, on the back of the frame over the tailboom. I have no glitches. I use a deans antenna. It is a neat setup and I have never had a problem. I have used them for years on my helis. Also as bdavison mentioned , be careful spooling up your headspeed. These little motors will eat a main gear up. The other day for some reason, who knows why, I hit my idle up 3 switch as I was turning things on and the little motor was immediately screaming with me trying to figure what was happening. That motor chewed several teeth off the main gear in a split second. I have had this happen a few times with the larger helis and with the exception of being quite exciting for a few seconds it doesnt really tear anything up. I flew a couple of times today. I am still trying to fine tune my idle-up settings. These electric motors dont help you like the nitro engines do. It is quite interesting. A little different type of challenge.

    _____________________________

    Al

    (in reply to jh4db536)
           Post #: 101

    RE: HeliMax MX400 CCPM heli "build" thread - 12/3/2005 6:42:28 PM   
    Jet Jaguar



    Posts: 57
    Joined: 2/10/2005
    From: Marietta, SC, USA
    Status: offline     		I just bought one a few days ago, and this is the setup i went with:

    Himax 2815, 4000kv
    Phoenix 25 esc
    The new Evo Flight heading lock gyro
    Eflite s75 servos (was going to use 56's, but did not want to modify to mount them)

    The himax motor should be more than plenty of power for this little bird, i'm having to gear down to a smaller pinion to reduce head speed, but i should get alot longer run times. This himax should be able to produce tons of power without even breaking a sweat. hopefully i will have it all put together by next weekend. I am very excited to get this heli going.

    _____________________________

    Enjoy what you have, because it might not last long

    (in reply to aws23)
           Post #: 102

    RE: HeliMax MX400 CCPM heli "build" thread - 12/3/2005 7:57:52 PM   
    heli-savage


     

    Posts: 84
    Joined: 9/1/2003
    From: Grande Prairie, AB, CANADA
    Status: offline     		This is a new heli to me as well. I have a Mega 16/15/3 with a CC25 ESC. I'm fairly new to helis in general but can easily hover my Raptor 50V2. I am in northern Canada and it is way too cold to be screwing with nitro, so to continue my training, I bought an electric to use throughout the winter, either indoor or out. I am looking for some info on the best recommended ESC settings and Throttle/Pitch curve for this bird, to continue the training & hovering thing. Any suggestions? Thanks,

    Dion

    _____________________________

    Don't be afraid to try something new - Remember the ARK was built by ametuers, the TITANIC was built the professionals!!!

    (in reply to jh4db536)
           Post #: 103

    RE: HeliMax MX400 CCPM heli "build" thread - 12/4/2005 3:48:45 AM   
    aws23


     

    Posts: 41
    Joined: 5/27/2003
    From: Kansas, IL, USA
    Status: offline     		I certainly agree with bdavison about the difference between the XRB and the MX400. If you are new to helis of any kind and you have been flying an XRB, when you get your MX400 you start all over in the learning process. Put on your training gear and try to keep it low till you learn to hover. Keep it low till you are sure you are controlling it and it isn't controlling you, then learn to move it from place to place. Then I try to insist (sometimes with little success) that before you take the training gear off, learn to hover nose-in. This one manuever is by far the most important manuever to learn, and it isn't easy. Everyone wants to get up in the sky and blast about with great speed. This is fairly easy to do, somewhat like flying a plane, but to do this you have to hover to get started and after blasting about you have to get the thing slowed down, back to a hover in front of you and settled to the ground. It is hard to accomplish all this without it being nose-in to you at some time. If you haven't practiced this, you are in trouble. If you are blasting down wind, turn upwind, the thing will stop, you looking at the nose for a second or two and down it goes. The best way by far is to practice this on a simulator. Why should I buy a $200 dollar sim just to learn to hover nose-in????? I have been flying helis for 35 plus years and I still fly a simulator a lot. Without question over the years, that $200 dollars has saved dollars many, many times over the cost. All this is probably quite primary to some of you but to the new guys it will hopefully be helpful. A question I hear a lot-------How long has it taken you to learn to fly like this? Answer-- I don't know, I am still learning. Another question--Are helis harder to fly than planes??? Answer--No it just takes longer to learn. Question----How long did it take you to learn to fly inverted?? Answer, About 5 seconds-----

    _____________________________

    Al

    (in reply to heli-cuzz)
           Post #: 104

    RE: HeliMax MX400 CCPM heli "build" thread - 12/5/2005 12:02:14 PM   
    jaless


     

    Posts: 42
    Joined: 8/11/2005
    From: Howell, MI, USA
    Status: offline     		Al/bdavison,

    Thanks for the reply. Still waiting for my Futaba micro 6ch PCM rev to come in. Till then I will continue to fly the Blade. Just did a small rebuild on the Blade to replace a few worn parts including the tail motor. Second time for the tail motor. As you stated Al, I want to learn to fly nose in before I start doing anything exciting with the MX400. I do have a sim and have been doing some flying on it but not nearly enough yet. Another question if I may. I have a Phoenix ESC and I am using slow start, not slowest start or quick start. Because this is the first ESC that I have used, what should I expect from slow start. I move the throttle up a couple of clicks and the blades start to turn with a small, quick jump and then spool up to whatever position I have the throttle stick. This takes about 5 seconds. Why can't the ECS just start up like the Blade, fully proportional with the throttle stick movement from nice and slow up to full throttle without the quick start or gradual spool up? Does this have to do with brushless motors or is it an ESC thing?

    My Sincere Thanks For All Your Help Guys!

    Joe

    (in reply to aws23)
           Post #: 105

    RE: HeliMax MX400 CCPM heli "build" thread - 12/5/2005 4:00:32 PM   
    bdavison


     

    Posts: 3333
    Joined: 8/23/2004
    From: Warner Robins, GA, USA
    Status: offline
    quote:

    Question----How long did it take you to learn to fly inverted?? Answer, About 5 seconds-----



    ROFLMAO....HAHAHAHAHAHAHAHAHAHA

    Aint that the truth.....Question: How long did you fly inverted? Answer....About the same.

    _____________________________

    teamflyingcircus.com

    (in reply to aws23)
           Post #: 106

    RE: HeliMax MX400 CCPM heli "build" thread - 12/5/2005 4:13:27 PM   
    bdavison


     

    Posts: 3333
    Joined: 8/23/2004
    From: Warner Robins, GA, USA
    Status: offline     		All of you that have put your MX400 together. ...Im having an issue. If I grab a flybar paddle and line it up with the elevator linkages and twist a little, the elevator linkages seem REALLY loose. Ailerons are tight...no slop there, but the elevator is making me wonder if there's something wrong....or am I just being too picky? I pulled it all apart and checked everything...its all tight, but something just doesnt seem right.

    If I cant get all this sorted out, Im going to order the eCCPM frame and the all metal T-rex head and be done with it. At this rate Im never going to get this heli up and running.

    _____________________________

    teamflyingcircus.com

    (in reply to bdavison)
           Post #: 107

    RE: HeliMax MX400 CCPM heli "build" thread - 12/5/2005 4:22:35 PM   
    aws23


     

    Posts: 41
    Joined: 5/27/2003
    From: Kansas, IL, USA
    Status: offline     		bdavison

    You got that right---when I first did the inverted thing it was with the switch. This was "many" years ago. When you flipped the invert switch the rudder, elevator and collective all reversed so it was fairly simple after you got used to seeing the thing upsidedown. I can fly swithchless inverted but I am still not all that comfortable with it.

    _____________________________

    Al

    (in reply to bdavison)
           Post #: 108

    RE: HeliMax MX400 CCPM heli "build" thread - 12/5/2005 8:42:43 PM   
    jaless


     

    Posts: 42
    Joined: 8/11/2005
    From: Howell, MI, USA
    Status: offline
    Bdavison,

    The MX400 is my second Heli, the Blade is the first so I am far from being an expert here but I believe I the slop you are talking abouts is caused by the slop in the aileron bellcrank. I did not like the slop in the linkage as mentioned in the supplement sheet not only because it rubbed on the elevator control horn but it just did not seem right to me. I made a modification to the bellcrank on both sides. i am enclosing pictures. I placed a small washer on the inside of both bellcranks. I couldn't find a washer small enough so when I tightened everything down the were binding. I filed a small portion of the outside of the crank so the screw would have enough room to tighten without binding. Here are two images. First time doing pic here so I'm not sure if it worked. If not I will get them out here

    [image][/image][image][/image]


    Joe

    Attachments
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    (in reply to bdavison)
           Post #: 109

    RE: HeliMax MX400 CCPM heli "build" thread - 12/5/2005 11:25:09 PM   
    aws23


     

    Posts: 41
    Joined: 5/27/2003
    From: Kansas, IL, USA
    Status: offline     		bdavison
    You have here a very sad heli flyer. I had a minor tipover a bit ago. The blades dug in pretty good, it sat back up and seemed OK till a close inspection found the center hub cracked. No big deal till I found they will not be available till January. You have mentioned that Trex parts fit OK. Could you give me some info on this? Thanks a lot.

    _____________________________

    Al

    (in reply to jaless)
           Post #: 110

    RE: HeliMax MX400 CCPM heli "build" thread - 12/5/2005 11:28:25 PM   
    bdavison


     

    Posts: 3333
    Joined: 8/23/2004
    From: Warner Robins, GA, USA
    Status: offline     		I have been told by multiple people that the T-rex head parts will fit on the MX400. I have not confirmed this though. From what I understand is the only part that wont fit is the main gears.

    _____________________________

    teamflyingcircus.com

    (in reply to aws23)
           Post #: 111

    RE: HeliMax MX400 CCPM heli "build" thread - 12/6/2005 12:04:22 AM   
    EZ Money


     

    Posts: 149
    Joined: 6/3/2003
    From: Las Vegas, NV, USA
    Status: offline     		aws23,

    Go here and you can get a metal hub. I upgraded mine and it will not break (at least there) again.

    http://www.grandrc.com/inc/sdetail/18978

    _____________________________

    Ron Landram
    http://www.ezmoneyracing.com

    (in reply to bdavison)
           Post #: 112

    RE: HeliMax MX400 CCPM heli "build" thread - 12/6/2005 12:28:37 AM   
    aws23


     

    Posts: 41
    Joined: 5/27/2003
    From: Kansas, IL, USA
    Status: offline     		Thanks bdavison and EZ Money I checked GrandRC and they are also out of stock. Surely something will turn up-------

    _____________________________

    Al

    (in reply to EZ Money)
           Post #: 113

    RE: HeliMax MX400 CCPM heli "build" thread - 12/6/2005 5:25:36 AM