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T-REX 700 › TREX 700E
10-14-2010 04:44 PM  8 years agoPost 1
HarveyR

rrVeteran

France - North

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I'm slowly making my mind up to buying a TREX 700E.

Here's what I'm looking at :

T-rex 700 E Flybarless Super Combo:
- T-rex 700E Kit
- Aluminium Tail Tube
- Carbon Tail Tube
- Brushless 700MX (510KV) Motor
- ESC Castle ICE HV 120A
- 690mm CF main blades
- 105mm CF tail blades
- 3G Flybarless System
- Servo DS610 x3
- Servo DS650 x1
- Bec 6A Step Down 5.1V

It's 1200€ from a local shop .... FlyingHobby has it for 940€, but with ICE80A instead of ICE120A, so... and I'm sick of custom problems/costs/delays and I'm sure this kind of package will get cought, adding approx 25% (so equal price in the end)

Anyone see anything possibly wrong with this combo (is the 6A BEC OK for example)? How's the new 700E (with MX motor) getting on? Any bad issues?

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10-14-2010 07:18 PM  8 years agoPost 2
litespeed600

rrKey Veteran

St. Charles, Missouri

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Your combo is great. I'm flying the same combo but with the 80HV/700M motor and it simply works, no bad things to say what so ever. I would just go with the 120HV for piece of mind. I fly mild 3D sometimes a bit harder and the Align 6A BEC simply works.

I have the 700MX (510KV) on the way just because I found a brand new one dirt cheap.

Enjoy your purchase!

Tom

Married with 2 kids, I am no stranger to pain!

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10-15-2010 12:18 AM  8 years agoPost 3
RCMUstang

rrNovice

Rockville, MD - USA

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I am building this combo exactly right now. The frame and tail boom are complete. The flybarless head is next. The build has been very straight forward.

Like you I am planning to build this with a Castle ICE HV 120. The alternative ESC I would consider is the Kontronic JIVE 120, but that is too expensive for my blood right now. Most modelers consider it a better ESC, especially because of the governor. Since I am not a hard 3D pilot by any means, I don't see it as an issue for me right now.

Make sure you check the Castle ESC you receive. Castle has a few recalls out now on ICE model ESCs where the heat sink may become unglued from the electronics. Fires and model crashes have resulted. Castle has a fix program in place if you have a bad model. They will correct the problem.

Good luck!

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10-15-2010 08:43 AM  8 years agoPost 4
HarveyR

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France - North

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Thanks for the feedback. I'm pleased to hear the build should be smooth. Is it necessary to check all the screws/nuts for thread lock and tightness? or does this model have "good statistics" for quality of pre assembly?

How should I check the ICE ESC? Do I just try pulling at the heat sink to check it doesn't come off?

My old heli should be sold by next week and then I think I'll pass the order for the 700E combo.

I read things about the main gear breaking, is this still an issue with the newer 700E (the one with the 700MX)? I can't remember exactly what the advised replacement gear was (wasn't Align I don't think).

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10-15-2010 12:34 PM  8 years agoPost 5
Bruce Naylor

rrApprentice

Swindon, Wiltshire, UK

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If it helps, I've been flying the 700E (700M motor) on an CC Ice 80HV for past 5 months with FB head and not had any issue. Running 4 sets of 12S 25C 5Ah cells with occational "hard" flights just to see what the current draw/flight time reduction was llike, but the CC has never over heated or cut out. I mounted mine on the back poarch since the CC spec says it's performance figures are based on something like "5mph airflow"

Bruce.

"If you know what you're doing, you're not learning much"

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10-15-2010 05:31 PM  8 years agoPost 6
iHover

rrVeteran

Berne , NY

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I've been flying the heck out of my 700E for the whole seasson. Mild 3D and sport. The only thing I'd change in the package you listed is the BEC. When the G3 1st came out a lot of people seemed to be having issues that seemed brown out related. I went with the CC Pro and havent had any issues. I also went with a lower amp esc CC HV85 because I had one already. Its held up fine so far.

You had me at Hover

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10-19-2010 08:41 AM  8 years agoPost 7
HarveyR

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France - North

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Damn! The old heli isn't sold... it's not so much for the money (I'm only selling it 150€), it's just that there's no room on my "heli shelf" to squeeze the 700E!

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10-19-2010 12:41 PM  8 years agoPost 8
litespeed600

rrKey Veteran

St. Charles, Missouri

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Build another shelf.......

Tom

Married with 2 kids, I am no stranger to pain!

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10-19-2010 04:29 PM  8 years agoPost 9
Raptorz499

rrKey Veteran

NJ

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Or hang it from the ceiling!

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10-19-2010 10:35 PM  8 years agoPost 10
spektre57

rrNovice

Brisbane, Australia

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700E
I have been flying my 700E for about a month now and it is a great combo. I am running stock as you described and have not had any problems to date, it all works as it is supposed to. I fly mostly big aeros/mild 3d and have no overheating, cutouts. I have seen a 700 fly with a 80A esc but for peace of mind I would go for the 120A.

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10-20-2010 04:18 PM  8 years agoPost 11
HarveyR

rrVeteran

France - North

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More room... why not, but still, I don't like keeping old useless stuff, I'd prefer to get rid of it (a Schluter Magic Ranger, Vintage).

Thanks for the input about the Combo, I now know that this stuff is OK, which is what I was looking for.

Anyway, too many strikes these days to order stuff safely, I'll wait for the calm to be back and order then.

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10-20-2010 06:39 PM  8 years agoPost 12
Mystic_2003

rrNovice

Willis, Tx

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Thanks for the feedback. I'm pleased to hear the build should be smooth. Is it necessary to check all the screws/nuts for thread lock and tightness? or does this model have "good statistics" for quality of pre assembly?
Absolutely check, inconsistent sometimes threadlock, sometimes not, sometimes grease, sometimes not.
Don't bother trying to get the blade grip bearings out to grease the thrust bearings, Just use qtip to get grease in there.

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10-20-2010 08:05 PM  8 years agoPost 13
RCMUstang

rrNovice

Rockville, MD - USA

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Agree with the comment on the thrust bearings, but you may be able to get them out by using a little bit of heat on the grips. It did not take much, but I was able to loosen everything up enough to get to both thrust bearings. Mine did have grease in them, but ultimately not really enough.

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10-20-2010 08:30 PM  8 years agoPost 14
HarveyR

rrVeteran

France - North

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I definitely would prefer a full kit version, avoiding having to ask myself these questions, I'd just do a slow cautious build. I don't really like taking apart for nothing, because I always feel screwing/unscrewing puts some wear and tear on the parts, but from what you say I'll check... I don't like this business of the blade grip bearings and thrusts being hard to get at... Well I'll see when I have mine

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10-21-2010 06:24 PM  8 years agoPost 15
Evan D

rrApprentice

Charlotte, NC

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It's a good deal for a great helo and combo. My concerns would be the crisis, things are just too unsettled in France now and you may have problems with mail or even banking. Things are crazy there right now and look to become worse soon. Good luck with your choice and getting it to you....

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10-21-2010 06:28 PM  8 years agoPost 16
504Rone

rrKey Veteran

New Orleans, LA.

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Get the one with the mx motor.

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10-22-2010 10:18 AM  8 years agoPost 17
HarveyR

rrVeteran

France - North

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Well, the order's passed (with 700MX). I added a RX for it to be complete. I already have a 12S charger (Hyperion EOS 0615i DUO3) and 4 6S 5000mAH LiPos, so I should have it all to get going!

This shop usually delivers really well and I should have the heli tomorrow lunch time (they deliver next morning if you order before 6PM, that's cool)! Hope the strikes don't mess it up, I've taken the insurance anyway just in case. Just consider all this (the crisis/strikes) part of the French folklore, nothing to worry about (despite the pictures), it's not much worse than most years around this period.

So, hopefully, tomorrow I'll open the box and tomorrow evening start looking close at the build. I'm in no hurry because my Swift620SE and HawkPro are flying just great in the meantime, so it'll be a calm/cautious build, probably spanning a few weeks knowing me (also, I've ordered some parts to try to get that stupid TREX250SE working (I have some old threads about this), I'm giving it a last chance before giving it to the club members for parts).

Thanks all for your advice and comments, and I'll likely be back with my "build questions".

PS : Still got the shelf problem though... I'll probably end up giving the Magic Ranger way...

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10-23-2010 08:47 AM  8 years agoPost 18
HarveyR

rrVeteran

France - North

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Well!!! It's here (12hrs delivery)! I've just done a quick content check and at first glance everything looks OK. Be looking more in details later.

Wish me a good week-end!

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10-23-2010 09:57 AM  8 years agoPost 19
HarveyR

rrVeteran

France - North

My Posts: All  Forum  Topic

Had time to have a better look, good news is that the pre-build is less than I thought, leaving more fun for me. Everything really looks nice and high quality.

How long did it take you guys to build? I'd say a good 30 hours (or more) by the time it's built/checked, electronics installed & tested, balanced, strapped up (wires, LiPos, ...), workbench settings done, ...

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10-23-2010 02:34 PM  8 years agoPost 20
RCMUstang

rrNovice

Rockville, MD - USA

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Thirty hours is probably the upper bound on the build time. I'd say I did the mechanical part in about 12-15 hours. The electronics still need to go in. I'm waiting on nylon wire wrap, my receiver battery, and the ESC. Everything should be here by next week some time.

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