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Old Jan 12, 2011, 08:31 AM
2012 ZX14R ....faster than you
CCbusa05's Avatar
USA, NV, Carson City
Joined Sep 2006
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I used to love flying my CX2s (had 3 of them during last year), but darn it anyway, I could never get them trimmed out to hover hands off for more than a few seconds. Then the dreaded tail drift and other problems related to that weak 3-in-1 / receiver set up would occur as the motors and electronics heated up during flight.
But now I'm having a ball flying the CX2's little brother, the mCX2. With the newer 5-in-1 electronics, this little guy flies hands off right out of the box! No more frustrating tail drift and if you're a good pilot you can fly this thing in a closet without crashing.
I also fly a Blade 120 SR but always find myself going back to my coaxials for relaxing indoor winter fun.
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Old Jan 12, 2011, 09:57 AM
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Originally Posted by CCbusa05 View Post
But now I'm having a ball flying the CX2's little brother, the mCX2.
Since you have experience with both... Does the mCX2 get as HOT as the CX2 with the motors? Any problems with the gyro losing "hold" on the 5-in-1 unit if/when it heats up? I ask because I have an mSR, which also has pretty much the same 5-in-1 unit (different T/R mixing, of course) and I think the drive motor for the main rotor is the same as the two in the mCX2. It doesn't get hot at all. Not the motor, battery, etc. In fact, it's barely even noticeably warm to the touch immediately after flying a full pack. I flew four batteries in a row several times yesterday without a "cool down" period in between. No problems at all. Now, my CX2? Those motors get HOT and I have the heat sink installed with Arctic Silver thermal paste and I cut/opened up the canopy for better ventilation.
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Old Jan 12, 2011, 01:32 PM
NotAnotherMomentLostToSei zures
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United States, MA, Malden
Joined Mar 2008
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You simply cannot compare the mcx2 motors to the CX2 motors. With these two helis, you are trying to compare apples and oranges. You flew 4 batteries back to back without any cool down between flights. This is an absolute recipe for disaster on your mcx2 motors even though they don't get hot. Are you aware of the fly time and cool down period for each of your helis? For your families safety, have you been educating yourself on lipo batteries and their care?

Mike.
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Old Jan 12, 2011, 01:41 PM
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United States, WA, Spokane
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Originally Posted by sviking View Post
Yes, the mSR is GREAT! I never knew how well such a small, light micro helo could fly. I was always soured on electric helos as I remembered the dismal performances of the larger ones back in the early-mid '90s. These things have come a long way.

What's a "v-tail modded" CX? Got any pics/videos?
There are quite a few modders like me that just took the next inevitable step addressing the mechanical and electrical issues that all coax's have in general. For me the engineering challenge was like a mouse the cat could not let go of. There are a few vtail threads. A vtail is a mixer that replaces one of the functions of the 3in1 so you can take it off your heli and now run a separate respectable gyro. Most guys run them in conjunction with brushless motors. This combination takes a ton of weight off the heli and they fly for up to 20mins per charge with a perfect locked in decent gyro. There are 3 main vtail mixers being used. All the way from a little $3.00 cheapie from Hobbyking up to the most expensive Dionysis selling for about $25.00.
here is one of the many threads on it
http://www.rcgroups.com/forums/showthread.php?t=1331390
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Old Jan 12, 2011, 04:15 PM
2012 ZX14R ....faster than you
CCbusa05's Avatar
USA, NV, Carson City
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Quote:
Originally Posted by sviking View Post
Since you have experience with both... Does the mCX2 get as HOT as the CX2 with the motors? Any problems with the gyro losing "hold" on the 5-in-1 unit if/when it heats up? I ask because I have an mSR, which also has pretty much the same 5-in-1 unit (different T/R mixing, of course) and I think the drive motor for the main rotor is the same as the two in the mCX2. It doesn't get hot at all. Not the motor, battery, etc. In fact, it's barely even noticeably warm to the touch immediately after flying a full pack. I flew four batteries in a row several times yesterday without a "cool down" period in between. No problems at all. Now, my CX2? Those motors get HOT and I have the heat sink installed with Arctic Silver thermal paste and I cut/opened up the canopy for better ventilation.
My mCX2 motors and STOCK batteries are just slightly warm to the touch after a flight session. To date, I have had absolutely no mechanical or electronics failure of any kind. Admittedly though, I've been flying coaxials for years and don't crash anymore, so that helps keep those type related problems to a minimum. I time my flying sessions for 6 minutes and always allow at least a 15 minute cool down between flights.
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Old Jan 13, 2011, 10:28 AM
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Originally Posted by CCbusa05 View Post
My mCX2 motors and STOCK batteries are just slightly warm to the touch after a flight session.
Thanks for the info. That's great on the batteries and motors not really heating up that much. My mSR is awesome in that respect. I have four batteries with two being larger 150 mAh ones and I flight them straight through with no cool down period(s) and zero problems. The gyro remains predictable with just some minor trimming throughout a flight as the battery wears down. I'd love to get an mCX, even though I find co-axes somewhat boring, just because I really appreciate the neat design and I can fly it in some pretty tiny spaces.
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Old Jan 13, 2011, 10:30 AM
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Originally Posted by Chap1012 View Post
You simply cannot compare the mcx2 motors to the CX2 motors. With these two helis, you are trying to compare apples and oranges. You flew 4 batteries back to back without any cool down between flights. This is an absolute recipe for disaster on your mcx2 motors even though they don't get hot. Are you aware of the fly time and cool down period for each of your helis? For your families safety, have you been educating yourself on lipo batteries and their care?

Mike.
No...I want to go up in flames. Educate me, Master Yoda...

And, those 4 batteries flown "back to back" were on the mSR and NOT my CX2. Zero heat issues and I've read where many people do the same thing with no problems. I don't even own an mCX2...
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Old Jan 13, 2011, 12:56 PM
NotAnotherMomentLostToSei zures
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sviking, Pardon'. By the last sentence of your post I assumed you flew out 4 batts back to back in your CX2. My mistook

Master Yoda
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Old Jan 13, 2011, 01:10 PM
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sviking, Pardon'. By the last sentence of your post I assumed you flew out 4 batts back to back in your CX2. My mistook

Master Yoda
No problemo.

As I said before, those CX2 motors do get HOT, even with the heat sink and thermal paste applied. The batteries get warm, but that's about it. I do let that one cool down. However, I haven't flown it a single time since getting the mSR. In fact, I wish I'd have just skipped the expense of the CX2 and the batteries/extra parts for it and went straight to the mSR since I already knew how to fly full scale and R/C helos. I just didn't know much about indoor electric helos and figured the co-ax was the best place to start. I had NO idea how stable the single mail rotor micro helos could be and I was blown away by the mSR. In fact, I hardly even "land" it anymore. I just pluck it out of the air by hand and launch it the same way from my fat ass lazy chair.

The CX2 is still a cool design, though, even if it flies "weird". The mSR flies MUCH more like what I'm used to.
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Old Jan 13, 2011, 02:33 PM
Fly em if ya got em.
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Winder Ga
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May I ask, which you think is more difficult? Real or RC? I know, what a question. But, I have had two copter pilots tell me if you can fly a rc copter, you can learn the real thing. Any thoughts? Lee
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Old Jan 13, 2011, 02:38 PM
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May I ask, which you think is more difficult? Real or RC? I know, what a question. But, I have had two copter pilots tell me if you can fly a rc copter, you can learn the real thing. Any thoughts? Lee
Well, I was flying R/C before I hit the advanced stage in Navy flight school, which is helicopters. Primary and intermediate was done in the T-34C turboprop fixed wing.

My situation was different but, looking back, I'd have to say full scale was harder because of the "Navy flight school" thing. Very academic and having an instructor breathing down your neck all the time. And, my job depended on it because, if I failed out, I'd have most likely been forced to go SWO and ended up driving ships. *barf*
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Old Jan 13, 2011, 02:41 PM
Fly em if ya got em.
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I was on operations specialist on the BB-63 myself. Ahoy Matey. hehe. Lee
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Old Jan 13, 2011, 03:03 PM
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I was on operations specialist on the BB-63 myself. Ahoy Matey. hehe. Lee
Yes...an OS on the Mighty Mo!!! I remember you telling me that before.
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Old Jan 13, 2011, 04:26 PM
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[QUOTE=sviking;17094366 And, my job depended on it because, if I failed out, I'd have most likely been forced to go SWO and ended up driving ships. *barf*[/QUOTE]

LOL
for so many reasons, LOL again.
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Old Jan 13, 2011, 04:32 PM
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Originally Posted by sviking View Post
No problemo.

As I said before, those CX2 motors do get HOT, even with the heat sink and thermal paste applied. The batteries get warm, but that's about it. I do let that one cool down. However, I haven't flown it a single time since getting the mSR. In fact, I wish I'd have just skipped the expense of the CX2 and the batteries/extra parts for it and went straight to the mSR since I already knew how to fly full scale and R/C helos. I just didn't know much about indoor electric helos and figured the co-ax was the best place to start. I had NO idea how stable the single mail rotor micro helos could be and I was blown away by the mSR. In fact, I hardly even "land" it anymore. I just pluck it out of the air by hand and launch it the same way from my fat ass lazy chair.

The CX2 is still a cool design, though, even if it flies "weird". The mSR flies MUCH more like what I'm used to.
If you shorten the flybar about 2inches or so off each end it should stop the porposing effect. If the overall length is say 5 to 6 inches or so it flies pretty agressively, much like your mSR (with some fat added).
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