RE: Trex 450SA Building, What components?

RE: Trex 450SA Building, What components?
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RE: Trex 450SA Building, What components? - 8/22/2007 7:00:08 PM

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no doubt they are better, I am only using them because I have 9 of them laying around. The ironic thing is, I striped my futabas out, put these in, and well, have yet to strip one out. Kinda wierd I guess. The G90HH gyro though, I truly like and see no problems with. Atleast in my ability of flying so far.

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RE: Trex 450SA Building, What components? - 8/22/2007 11:05:06 PM

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quote:

ORIGINAL: DrDeath

I would advise against using the E-Flite servos, hey are crap on a T-Rex. Spend the extra money and get the Hitec servos. You can get he HB or MG version. MG will last longer, but the Karbonites are better than most. If it wasn't for the fact that I had the 65MGs I would have been either replacing servos or gears after my crash. All three of my may servos on the heli stood up to the crash from about 20 - 25 feet up. Came straight down on the spinning blades. Broke one of the arms and no damage what so ever with any of the servos. Because like me are just learning, the Hitecs will last longer then the other servos. Plus they are pretty inexpensive.

I would go with the Align over the E-flite gyro just because I have read it is a little more stable. If you plan on staying with the T-Rex for a while, I would say upgrade the gyro to a Futaba 401. EVERYONE pretty much uses that gyro, best one for the price.

Hope this helps.

DD

Thanks for the advice I really do not have any experience about the use or abuse of this little servos and how they can handle the abuse, as a common RC Airplane flyer I have not had any bad experience with Hitec and I have had some JR striped. Well the choices are narrowing for me. There is an investment when we are talking about the gyro, personally I don't like the idea of buying one now and in a while buy another to upgrade, I can wait to buy the expensive one (futaba) but the next question would be:
Is there a significant difference about this type of gyros?
Is the difference related with the use of the Futaba servo?
Is there a choice to use the futaba Gyro with a different servo? (Money saving)
Thanks.
Alfred.

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RE: Trex 450SA Building, What components? - 8/23/2007 12:07:56 AM

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quote:

ORIGINAL: alfredbmor

Thanks for the advice I really do not have any experience about the use or abuse of this little servos and how they can handle the abuse, as a common RC Airplane flyer I have not had any bad experience with Hitec and I have had some JR striped. Well the choices are narrowing for me. There is an investment when we are talking about the gyro, personally I don't like the idea of buying one now and in a while buy another to upgrade, I can wait to buy the expensive one (futaba) but the next question would be:

Is there a significant difference about this type of gyros?

The better the gyro, the easier it will be to fly the heli. A good gyro will keep the tail locked in and it will not sway. This will make it easier for you to worry about just hovering and not worrying about the tail swaying back and forth

Is the difference related with the use of the Futaba servo?
See above

Is there a choice to use the futaba Gyro with a different servo? (Money saving)
The Futaba 401 gyro will allow you to use both digital and non-digital servos. The faster servo you use the steadier the tail will be. I have seen people use Hitec 65MG and HB's on the tail. The faster the servo the better. But, you will be ok with the Hitecs.

I am far from being an expert with the T-Rex, but the information that I have given is based on what I have learned talking to guys who has been flying helis for years and playing around with the T-Rex for almost a year. There is a great website with lots of videos on setup and configuration of T-Rex's over at http://www.helifreak.com/ and the Finless Bob's video's section. They are great.

Hope this helps and good luck.

DD

< Message edited by DrDeath -- 8/23/2007 12:09:07 AM >

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RE: Trex 450SA Building, What components? - 8/23/2007 4:55:26 PM

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Then it should be safe to use 4 Hitec 65 Karbonite or Metal geared. Gyro could be the Futaba 401 not needing to upgrade in the future. That is more than a sport set up and I think that this setup can handle respectable 3D flying.

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RE: Trex 450SA Building, What components? - 8/27/2007 5:46:53 PM

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Now about the radio:
I already have a JR 8103 DT transmitter which I'd like to use but and I have an older JR six channels receiver, the trex owners manual handles two kinds of receivers: The spectrum and the regular 72Hz receivers. Because of the noise produced for the motor and ESC they encourage you to use the Spectrum.
The question here is that if anyone has used the regular 72Hz radio system with out problems?
Thanks.
Alfredo.

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RE: Trex 450SA Building, What components? - 8/27/2007 6:40:14 PM

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If you use 72 and PCM you should be fine. I am using my 9303 with the 770S PCM receiver and I have had no glitches. Quite a few guys use PCM with no problems whatsoever. So you don't have to spend money on the 2.4 system just yet.

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RE: Trex 450SA Building, What components? - 8/27/2007 8:57:51 PM

BarracudaHockey

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FWIW I just got one of these to review. I used the HS56hb servos, a 401 with a 9650 and Flight Power EVO 20 packs.

With the flybar weights still it it was doing backwards snakes, piro flips etc with no problems with the motor and esc that it came with and a 13t pinion.

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RE: Trex 450SA Building, What components? - 8/28/2007 12:03:19 AM

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Andrew: I know that your review is about to come in, I mentioned in other forums that I could wait till read your review and then buy the Trex, well I could not stand, money were on fire in my hands so I had to run to the local HS and get the deal (a little lower than the current price). I have looked at it a thousand times and I like it a lot, I am currently saving some more money to buy the servos, gyro and battery.
I'd like to know from your experience if I did the right thing, as my second Heli and a beginner did I do a smart choice buying this heli?
Do you think that is it capable of flying in a training manner?
Thanks for helping.
Alfred.

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RE: Trex 450SA Building, What components? - 8/28/2007 8:15:22 PM

BarracudaHockey

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It will fly perfectly fine in a trainer manner. Reduce the throws a bit and a little expo and its a calm heli. If its got the throws cranked up and the weights off it will scram.

I dont like the aluminum frames, not that there is an inherent problem with them but carbon or plastic is either straight or its broken. I think it a crash these frames can bend and put side loads on the main shaft bearings or cause it to act nutty.

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RE: Trex 450SA Building, What components? - 8/30/2007 12:59:29 AM

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Are they compatible with the SE? I believe that in the unwanted but very possible case of a hard crash I could upgrade by buying the SE frames which I believe are made of carbon fiber, and you state, they should be straight or broken.
Your comments make my self less nervous in this new project, today I ordered the Futaba gyro 401 and S9650 Digital miniservo combo, next month I will order the HS65HB Hitec servos (3 of them) and the Thunder Power battery. I will need a charger and I am very lost in the world of chargers, I do not know about the difference between a regular charger and a balancer, Do I have to buy both of them? Should I get a balancer? Or just a plain Charger?
Thanks for your help.
Alfred.

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RE: Trex 450SA Building, What components? - 8/30/2007 1:18:28 AM

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As for chargers, get a good LiPo charger and get an Astro Blinky balancer with Thunder power adapter. Triton chargers are good. One new rudder servo to use on the Trex with a GY401 is the new Futaba S9257. Its faster than the S9650 and is a gyro only servo rated for 4.8v.

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RE: Trex 450SA Building, What components? - 8/30/2007 5:27:50 AM

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I have not found any one listing the new s9257. Who has it in stock?
An other servo that could be used is the S3154.

JIM

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RE: Trex 450SA Building, What components? - 8/30/2007 7:41:01 AM

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quote:

ORIGINAL: C5m7b4

They dont post the price until you add it to your card and it was pristine when I got it. I am using a Gy401 gyro and I have the ar6200 rx to go with the DX7 that I already had (and I love it), and I just picked up a JR perfomance mini heli servo set with three DS285 servos for the cyclic and one DS3400G digital servo for the tail. I paid like 150 for all 4 servos. the part number is JRPF300H. I love my setup and in all it was pretty cheap..

212.00 for SA
150 for servos
137.00 for gyro
45.00 for rx
total bill comes to 544.00

Not too bad for a T-Rex...

C5

Funny that I basically have the same helis as you in my "hangar"!

Can you get that CP Pro to fly as well as your T-rex if there is no wind?

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RE: Trex 450SA Building, What components? - 9/4/2007 11:32:19 PM

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Plus Battery and Charger.

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RE: Trex 450SA Building, What components? - 9/5/2007 4:26:45 AM

C5m7b4

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The problem is, 'when is there really no wind'. I can get it to fly pretty well, but the slightest breeze and you have to fight it. I put the CP Pro away, and now I just fly the Rex. It is soooooo much better that I dont want to re-learn any bad habits by flying a piece of junk. the difference between the two is like night and day. When the Rex first leaves the ground, its like a majical experience. It is sooo smooth when it is setup right. I recently put the Diablo head and it and even though it sounds different, it is way smooth. I like it. I was trying to get a little aggresive the other day and tail planted into the ground, but it was my fault. I was trying to fly in an enclosed space and trying to pop the throttle and do like 5 or 6 piros. One time it stopped and the nose was facing me. I'm still not used to that and I could not get the tail around fast enought.

C5