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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 04-13-2012, 01:54 PM   #1 (permalink)
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Default T Rex 450 electronics needed

So I picked up a new in box 450 Pro that someone took all the electronics out of. No servos, motor, or anything. I picked it up on Ebay for $175 so I don't think it was to bad of a deal, or if it was let me know what you guys think.

Anyway I need these parts and I figured going this route would allow me to upgrade from stock. I'm doing this on a bit of a budget and I don't have a transmitter yet either, but what do you guys recomend for a motor and servos? I see in the instructions there are 3 small servos and one large one. Also what do you recomend for a gyro and throttle control etc.?

I was reading another thead about the motors and saw the 450MX seemed a good choice, it's like $45, but others were talking about some cheaper motors for under $20. Reading some reviews it sounded like the Align motors weren't always the most reliable but then some say the cheap ones aren't either and other say they've had better luck with the cheap ones. Give me some feedback on these and what would be a good route to go.

I guess I should also mention I'm a newbe and this is my first CP heli so while I may not need super high end powerful stuff now I want to get some decent stuff that I can grow into and not have to upgrade later as my skills increase.

Thanks so much for all your help!
Geoff
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Old 04-14-2012, 09:27 AM   #2 (permalink)
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its a ok price if its a real trex 450pro airframe
i'm doing all this with some cost savings in mind

motor :

Used scorpion 2221-8 from the forums first choice
align 450mx is ok
any 3500-4400kv motor from hk for 15-25.00

servos: Dont go to cheap here, Metal gear and DIGITAL

henge 3 md933's and 1 md922 for tail about 50.00
http://www.ebay.com/itm/F00007-F0000...item3cb809f22c
this is as low as I would go and consider it decent to good

align or hitec great but 100-150.00 for all 4 servos unless you find someone on here selling some, REMEMBER your tail servo has to be fast and all your cyclics have to be the same

gyro: flybar setup
Used spartan quark for 65.00 or less shipped
refurb spartan quark for 75.00 from spartan

Ga250 mems gyro from hk 10.00, its decent will do a beginner to intermediate just fine. I have flown inverted on one but dont try real 3d on it

gyro: flybarless
v-bar or beastx are best choices and pricey but if your wallet is ok with it go for it

tarot zxy and copterx are next in line and both are less than 100.00 with field programmers

ESC: I do not fly nothing but cc 50 on my 450's, they are bullet proof and dependable but with that they are 75-85.00

from HK
http://www.hobbyking.com/hobbyking/s...0_65A_ESC.html

http://www.hobbyking.com/hobbyking/s...hless_ESC.html
suppose be have alot of the same feature as the cc50 if you get this one get the USB programmer for it

http://www.hobbyking.com/hobbyking/s...ontroller.html

http://www.hobbyking.com/hobbyking/s...ixed_Wing.html

there you have it
I go a little larger on my esc's because I have seen current draws on my cc50 of 58-64amps
a beginner wont see that but better safe than sorry, you dont want nothing smaller than a 40a, 50a is better
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Old 04-15-2012, 12:29 PM   #3 (permalink)
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Awesome! Thanks so much for the input! I'll check those out.

Any radio suggestions?
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Old 04-15-2012, 02:47 PM   #4 (permalink)
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new dx7 or dx8 are nice and simple
if you check the classifieds here you can get a dx8 for around 250.00

you really want to spend as much as you can realistically afford on your radio
IF you know for sure your staying in the hobby
that way as you grow your not buying another radio because the one you have wont cut it anymore
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Old 04-15-2012, 04:30 PM   #5 (permalink)
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Looking at the e-bay auction you linked me to. Do you know anything about this seller. His add doesn't make it sound to confidence inspiring. Anyone on the site dealt with then?

Also what do you think of HiTech radios? I was looking at one a bit the other day. That is one place I was looking to spend some extra coin. I'd like to get a good one that I can use for anything I may get down the road.
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Old 04-15-2012, 06:25 PM   #6 (permalink)
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its one of a few
I havent ordered from him but there are some others on there I have

you can always order them from here

http://tarot-rc-heli.com/Servos

they are located in CA. in the U.S.

you will pay a little more for the servos (about 17.00 each)
but they are in the United states and that still isnt bad
they also have the replacement gear sets if you ever need them
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Last edited by satgod; 04-15-2012 at 08:26 PM..
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Old 04-16-2012, 12:29 AM   #7 (permalink)
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Plus, if things are really tight get the DX7 used here. They tend to run less than $150 for pristine models, or a Dx6i that would certainly work for quite a while. Those go for $100 and are perfect first Tx's.
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Old 04-16-2012, 11:12 AM   #8 (permalink)
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it is a new one.satgod said the tarot website, i know it, the company is in china
this servo you can odre them from there
http://www.omgfly.com/index.php?main_page=index&cPath=7.
It is located in CA.
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Old 04-16-2012, 02:47 PM   #9 (permalink)
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I see there is an Align GP780 Gyro for sale in the for sale section on this site. Is this a good gyro? In doing some research on it I see everywhere calls it a "head lock" gyro. What does that mean?
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Old 04-16-2012, 10:14 PM   #10 (permalink)
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It is a decent Gyro, had on myself, it worked fine.

Ok, gyros have two modes. Rate mode means that the gyro will adjust the tail rotor to try to impend the movement of the tail. However it does not try to put the tail back. Heading Hold/Lock means that it actively tries to keep the tail in the same spot and will even go so far as to move it back to ware it was. Both let you move the tail with the TX without resistance. Most everyone flies in Heading Hold/Lock anymore. Some scale people will fly in Rate mode because the tail will kinda naturally follow the heli and they feel it gives them a more scale look and feel. It varies by radio, but on mine, a gyro gain of 0 to 50 is rate mode, and 51 to 100 is Heading Hold. (I think on some it is -100 to 0 is rate and 0 to 100 is Heading Hold)

Radio: I would suggest a Spectrum DX6, DX7, or DX8. All will work, but the higher ones have some more channels and features. The extra channels would be useful if you ever make a scale and want to have retractable landing gears, or get a nitro and have a governor. For your RX, you will want one of the full range ones, 6 channel at least, and you don't need a satellite on a 450.
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Old 04-17-2012, 04:53 PM   #11 (permalink)
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Thanks so much Sqrt!

What do you guys think of the JR 8103? I've seen seeing a couple of them around for fairly cheap. Or would you stick with a DX7? I haven't seen many of them for sale. Was trying to just find a good used one as to keep the cost down. Just got a new street bike so the funds are running a bit low now! LOL!
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