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T-REX 700 › 700E v1, any dirty little secrets?
08-12-2012 02:58 PM  5 years agoPost 1
helidevil

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Brunswick, ME

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im getting my first 700E soon, hopefully for ircha. is there anything important i should know so i dont blow the thing up?

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08-12-2012 10:11 PM  5 years agoPost 2
Richardmid1

rrProfessor

Leeds, England

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Nope! Awesome heli!

60% of the time, it works every time!

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08-12-2012 11:58 PM  5 years agoPost 3
unclejane

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santa fe, NM, USA

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By "v1" do you mean truly the v1 700E? If so, the lower frame construction is a bit weak, so I'd suggest the KDE lower frame brace:

http://www.kdedirect.com/TREX700ERFMB.html

This strengthens up the rear bottom of the heli considerably.
I believe the v2's and later come with a similar part from Align to stiffen the frames up in this area tho.

Also, use green locktite on the motor shaft where the tip of it goes into the lower bearing block. Otherwise, it'll spin in the bearing and gall the tip of the motor shaft.

Other than that, it's a fine machine as-is. I'm still flying my old V1 700E after converting it to FBL with an old-school V1 FBL head and a Align 470kv motor (for better running at low head speeds). Still haven't worn anything out on it...

LS

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08-13-2012 12:46 AM  5 years agoPost 4
rstacy

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Rochester, NY

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If you are going to fly it medium to hard, in order to make it reliable, consider the following

KDE radio tray - This allows you to run the batteries far enough forward to get proper balance

The frames are too flexible. This causes gear failures.
The following four pieces will stop you from stripping main gears

KDE main gear
KDE adjustable motor mount
KDE pinion support
KDE main gear third bearing support

NO, I am not sponsored by KDE. KDE just happens to be the company that stepped up and made the parts.

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08-13-2012 01:19 AM  5 years agoPost 5
helidevil

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Brunswick, ME

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i believe the heli comes with a few KDE upgrades including the adjustable motor mount. If i get the opertunity to upgrade the rest from a crash i will thanks guys!

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08-13-2012 01:36 AM  5 years agoPost 6
unclejane

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santa fe, NM, USA

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Er, what rstacy said... I don't fly my machines hard enough to break or strip things until I finally crash, but if you do definitely follow his advice. I'm also a KDE fan, since they make these just fantastically well made parts. They add both quality and bling....

LS

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08-13-2012 05:40 AM  5 years agoPost 7
Stephen Born

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USA

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The following four pieces will stop you from stripping main gears
KDE main gear
KDE adjustable motor mount
KDE pinion support
KDE main gear third bearing support
@ rstacy,

I have all three KDE mentioned above excluding the third bearing support. What is the significance of having a third?

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08-13-2012 08:39 AM  5 years agoPost 8
Richardmid1

rrProfessor

Leeds, England

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Helical main gear and pinion if it hasn't got it already is all is needed to prevent the main gear stripping.

60% of the time, it works every time!

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08-13-2012 09:00 AM  5 years agoPost 9
HarveyR

rrVeteran

France - North

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My V1 is fully stock and has over 200 3D flights (mildish) and is just fine, never crashed.

One thing I remember is that there were quite a few versions of the V1 around at the end of 2010 when I bought mine (some with problems with CC, some without CNC main gear, some with a tail rotor issue, ...). It could be important to know exactly when it was bought to see what the status was back then.

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08-13-2012 11:38 AM  5 years agoPost 10
rstacy

rrElite Veteran

Rochester, NY

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I have all three KDE mentioned above excluding the third bearing support. What is the significance of having a third?
The problem is that the frame design isn't nearly stiff enough for aggressive flying.
If you fly it hard, the frames will flex and this causes the pinion to take out the main gear. You can see this flexing by grabbing your 700E by the head and rocking it back and forth.

Regardless of the main gear that you use, you need to stiffen up the structure.
The third bearing support does just that by engaging the bottom of the main shaft thus using the main shaft to help support the frames.

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08-13-2012 05:30 PM  5 years agoPost 11
Robert Merlino

rrNovice

Tewksbury, MA

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Yup, agree with everthing Ray just said. The third bearing block is absulutely essential for hard 3D flying, othewise the twist in the frame will cause the pinion to eat the main gear for lunch.

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08-13-2012 06:42 PM  5 years agoPost 12
El Guapo

rrNovice

San Jose, CA - United States

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my V1 has a lot of the v2 stuff and a third bearing block.

but...

#1 biggest issue I had was the tail authority. 2 months ago the solution was to use 115mm tail blades and ballistic head speed.. but now align released helical anti rotation tail gears with a higher ratio. and with those gears you can run 105mm tail blades and great tail authority.

"Align 700E 104T M1 Helical Autorotation Tail Drive Gear Set H70110"

Lynx team pilot

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08-13-2012 06:48 PM  5 years agoPost 13
Richardmid1

rrProfessor

Leeds, England

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Sorry that is just not true.

60% of the time, it works every time!

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08-13-2012 06:55 PM  5 years agoPost 14
Stephen Born

rrElite Veteran

USA

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#1 biggest issue I had was the tail authority. 2 months ago the solution was to use 115mm tail blades and ballistic head speed.. but now align released helical anti rotation tail gears with a higher ratio. and with those gears you can run 105mm tail blades and great tail authority.
I ran 105mm on my 700e with no issue whatsoever.

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08-13-2012 07:19 PM  5 years agoPost 15
Richardmid1

rrProfessor

Leeds, England

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As do many others aerialskycam! Even hard 3der's doing fast piro hurricanes!

60% of the time, it works every time!

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08-13-2012 07:46 PM  5 years agoPost 16
Stephen Born

rrElite Veteran

USA

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690-710mm mains = 105mm tail

800mm mains= 115mm - 120mm tail

Just sayin.

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08-13-2012 08:00 PM  5 years agoPost 17
El Guapo

rrNovice

San Jose, CA - United States

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the new gears are awesome and are a huge improvement.... part number is H70110. the motor bearing support needs to be trimmed to fit the larger gear.

Lynx team pilot

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08-13-2012 11:11 PM  5 years agoPost 18
Twrecks600

rrKey Veteran

Round Rock, Texas

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1000 flights on my V1 3g stock. Just upgraded to the V-Bar this weekend and I'm in love all over again!!

I did install the KDE frame brace stiffeners and adjustable motor mount at around the 500th flight mark and have had no issues to date.

Team me

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