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450 Class Electric Helicopters 450 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 07-19-2014, 09:50 AM   #1
vtown nick
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Default Trex 450 sport v2 6s dominator conversion

I have given up with the low power issue my 450 sport v2 has and decided to reward it for being a great heli. So I ordered some goods last night:

Align 460mx 1,800Kv
Castle Talon 35
Kst cyclic servos
4 gens ace 40c 1,200 mAh (smallest 6s size out of the other brands)
Lynx dfc arms (so when I crash it hopefully won't kill servos)
XT60 connectors (I hate my EC3 so much!!)

I'm still going to swing 325's for a while. All the reading I've seen is putting off mixed emotions on gearing. Since a lot are running 360 blades I'm not sure what to go with. I have both 11t and 12t pinions. Should I run the 12t and run a gov or 11t all out?

I'll post photos and videos as the parts come in
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Old 07-19-2014, 10:19 AM   #2
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What kind of head speeds are you aiming for?
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Old 07-19-2014, 10:37 AM   #3
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What kind of head speeds are you aiming for?
I honestly don't know. I would just be happy to be able to do 100-200 foot funnels and really fast backwards flight in the wind without major bogging. Tic tocs will almost cause a blade stall by the 3rd or 4th, my bone stock 500 will do them all day. Aiming for the power to weight ratio that my 500 pro has if that makes any sense.
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Old 07-19-2014, 10:48 AM   #4
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I'd recommend that you try both the 11T and 12T for yourself to feel the difference. Assuming you are talking abou the helical gears on the 121 main. Helicopters are very strange, in that they have a sweet spot where they perform the best.

To say your headspeed is X number really doesn't mean anything. I often find out what I like by flying it... and then do the math and am surprised at what I actually like.

That being said, if you want the 325mm blades to really bite and bark, they'd do best with the 12T pinion.

If you ran longer blades, like 353, or 360, I'd recommend the 11T.
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Old 07-19-2014, 11:04 AM   #5
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I'd recommend that you try both the 11T and 12T for yourself to feel the difference. Assuming you are talking abou the helical gears on the 121 main. Helicopters are very strange, in that they have a sweet spot where they perform the best.

To say your headspeed is X number really doesn't mean anything. I often find out what I like by flying it... and then do the math and am surprised at what I actually like.

That being said, if you want the 325mm blades to really bite and bark, they'd do best with the 12T pinion.

If you ran longer blades, like 353, or 360, I'd recommend the 11T.
That was what I felt may happen. I may just put the 12t on and play around with the gov or go all out. I really like high head speed, the 3k head speed on my 500 is damn sexy! I flew a esp and it was pretty boring with a good 600 less rpms. I have flown a dominator but it had a 80% flat throttle and was very calm, wasn't mine or I would have ran a higher throttle curve.
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Old 07-19-2014, 11:49 AM   #6
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Yea its a misconception that the Dominator is geared for high headspeed. The ESC only goes up to 90 percent and it comes with an 11T pinion.

A lot of the psycho videos online, the guys put a 12T pinion in it. And then it becomes an aerial weapon.
Its fairly chill in stock in form.

I even put the 10T helical on it for awhile.. but Align had it right.. as usual.
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Old 07-19-2014, 02:46 PM   #7
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If you have your 500 at 3000 rpms and like the way it flies you better be setting the 450 up for at least 3600 rpms.
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Old 07-19-2014, 03:44 PM   #8
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if you want even more crazy 6s, get the Scorpion 2520 1880Kv. Just make sure you have a ESC that can run it.
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Old 07-19-2014, 06:10 PM   #9
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From what I've read the 1800kv dominator motor should fit my needs then with a 12t. Either way it can't be as bad as it is now haha
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Old 07-20-2014, 07:57 AM   #10
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Even the MX 1700kv delivers quite some power. And it's one of the most efficient i've run (the most efficient i've run is the Warp motor).
The 1800KV will cut a bit of flight time and the 2520 will cut a nice chunk on top of it
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Old 07-20-2014, 08:58 AM   #11
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Even the MX 1700kv delivers quite some power. And it's one of the most efficient i've run (the most efficient i've run is the Warp motor).
The 1800KV will cut a bit of flight time and the 2520 will cut a nice chunk on top of it
I'm ok with shorter flight times power and agility is more fun than long flight times to me!
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Old 07-20-2014, 11:01 AM   #12
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The 460mx will do 4 minutes of psycho 3D on your 1200 if you run them down to 3.7-3.8
I fly the 460mx on a 1250 battery and 360mm blades and get 4:00 3D coming down with 3.7
I used to be all crazy about only going down to 3.8 but honestly it doesn't hurt the batteries.
What I love about Align motors is the balance they achieve. Great power/torque, low maintenance, and great flight times.

I know there are more powerful motors to buy.... but IMO, none have the overall balance of characteristics. And of course, they don't cost as much either.
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Old 07-20-2014, 02:34 PM   #13
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The 460mx will do 4 minutes of psycho 3D on your 1200 if you run them down to 3.7-3.8
I fly the 460mx on a 1250 battery and 360mm blades and get 4:00 3D coming down with 3.7
I used to be all crazy about only going down to 3.8 but honestly it doesn't hurt the batteries.
What I love about Align motors is the balance they achieve. Great power/torque, low maintenance, and great flight times.

I know there are more powerful motors to buy.... but IMO, none have the overall balance of characteristics. And of course, they don't cost as much either.
That's more than enough! I don't own a single heli worthy of more than 3 minute flight times, that or I'm overly cautious on my lipos.

Anyone know the efficiency on the 460mx? Trying to put some numbers in a headspeed calculator to figure out the final rpm approximate.

It is saying somewhere in the ballpark of 4,000 rpms on this setup at beginning of flight with 12t/121t gearing which seems way higher that it really would be.
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Old 07-20-2014, 02:51 PM   #14
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Yep. All those calculators are just loose estimates. Only the high grade tachometers are worthy of measuring the actual blade rpm. I would start with the 11T and see how it goes. Changing pinions is not that difficult and its better to see how your electronics fare on a smaller pinion. If after flying and testing the heat buildup, you want more- you can always add the 12T. This way is better than smoking your investment in the first flight.

You also have to consider the frame support limit. The 450L has motor braces to keep the overwhelming motor from twisting the frames. It'd be most wise to test the helicopter first and then add more headspeed as needed. If you start ripping it hard right off with the 12T, the motor might twist itself and slip the pinion off the main gear... depending on how hard you fly it.

What I find most awesome about 6s is that you can run a ton of collective pitch. Yea, headspeed is great and all.. but with the amount of torque on tap- you can really turn the headspeed down and the collective pitch way up. That's a sweet flying heli IMO. High head speed makes it very robotic and gyroscopic- it doesn't want to flip and roll easily. I like medium to high headspeed and a ton of pitch :-)
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Old 07-20-2014, 03:04 PM   #15
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I agree. I think youre focusing too much on getting a ballistic setup than how it will actually fly.

The 6s dominator fully stock at 3350 rpm is a missile. Thats where I fly the most, and it is enough for just about anything in my opinion.

Id give the stock setup a shot, then increase if you feel the need. 4k rpm is a tad bit overkill imo.
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Old 07-20-2014, 08:56 PM   #16
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Thanks guys, that does sound safer and when you put it that way with the dominator frame plates it does seem more wise to go step by step.

Believe me I don't want nor do I need 4k headspeed I just wasn't sure if I would overspin my blades at that speed.

The headspeed that I have with my 450mx and 12t is awesome, just no torque to back it. With a 11t it will produce a boatload of torque vs what I currently have so maybe I won't even need the bigger one, I just may not be able to use a governor. Then again I will be playing it safe all around doing it this way.

Thanks guys
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Old 07-20-2014, 08:59 PM   #17
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Quote:
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overspin my blades
no such thing
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Old 07-20-2014, 09:12 PM   #18
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no such thing
Well align puts a max head speed on their boxes. Some say ignore it, just trying to be safe.

I'm running the new blue 325 which are rated higher than the old 3G ones. I have a set of the lighter new black ones but had a servo fail forcing me to auto and one tip has a nick in it. I've flown them since but won't risk it with the new setup.
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Old 07-20-2014, 10:08 PM   #19
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Is this too much to ask for but on 325's?


Those hurricanes he does about half way through the flight, that's what I'm talking about! My current setup will fall out of the sky if I try that! Also all the aggressive collective during and after flips, that's what I can do with my 500 and hope to achieve with this setup!!
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Old 07-20-2014, 11:05 PM   #20
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i've seen over 4400RPM with 325's so you're good
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450 Class Electric Helicopters 450 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.

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