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01-10-2015 04:02 PM  3 years agoPost 1
stonegate

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alexandria

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Gentlemen can you give me some advise ,I use align motor RCM-BL800Mx 520KV on t-rex 700E ( the old version with push and pull bell crand not DFC )
main gear 115T ,pinion gear 12T is there any trouble with this set up or what do I need to change ?
Thank you .

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01-10-2015 04:14 PM  3 years agoPost 2
rcflyerheli

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Granbury, TX USA

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Are you sure it is a 115t main gear. I have the setup (V2) and it uses the 112T main gear, the same as the V3 DFC version.

Yes that setup should be fine.

Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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01-10-2015 04:26 PM  3 years agoPost 3
dchekas

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Farmington, CT

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With that motor, I would suggest going to the black 112 helical gear and matching 12T pinion.

http://www.alignrcusa.com/index.php...roducts_id=2662

http://www.alignrcusa.com/index.php...roducts_id=2597

The white 115T straight tooth gear is from the days of the 700M/700MX, I think it may struggle to keep up with the 800MX.

Team Align, Team Futaba, Team Byron Fuels, Team Thunder Power

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01-10-2015 04:26 PM  3 years agoPost 4
dialarotor

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Traverse City, Michigan

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From the 800mx 520 kv motor manual
grayed out caution box.

Caution: When using the motor on T-REX 800E, please use 112T main gear with 12T motor pinion. Set the head speed at 1900RPM and collective pitch at ±12°

see specs at end of listing information.

http://www.ebay.com/itm/23144656297...K%3AMEBIDX%3AIT

RapRexSynLogo Pilot

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01-10-2015 04:41 PM  3 years agoPost 5
RussJ

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lockport, new york usa

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The set-up should work as mentioned. Depending..... What esc are you using?, if your running the Castle are you going to use the governor?, are you running a 12s battery set-up?, what headspeed do you plan on running?. A little more info would help us. Double check your main gear tooth count as well. It will make a big difference on your headspeed calculation if it is a 112 tooth main gear.

Russ

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01-10-2015 04:49 PM  3 years agoPost 6
RussJ

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lockport, new york usa

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Dchekas and dialarotor jumped in before I did, I'd go with their suggestion on the main gear. Thanks for the info.

Russ

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01-10-2015 06:52 PM  3 years agoPost 7
stonegate

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alexandria

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my main gears is 115T straight teeth and pinion is 12T ,speed control is castle creation phoenix Ice2 HV 160 ,set governor speed1:1900
speed2:2025 and speed3:2100.
I also read caution from Helipal said if use this motor for T-rex 800
should use 112T main gear 12T pinion .
my choper is 700 class not 800 does it make any different ?
thank you

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01-10-2015 06:54 PM  3 years agoPost 8
stonegate

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alexandria

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oh yes I am running 12s.

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01-10-2015 07:06 PM  3 years agoPost 9
dchekas

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Farmington, CT

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No difference, the 700 and 800 main gears have the same bolt pattern, and share the same auto hub.

Team Align, Team Futaba, Team Byron Fuels, Team Thunder Power

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01-10-2015 08:12 PM  3 years agoPost 10
rcflyerheli

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Granbury, TX USA

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IMHO, I think you might have issues with the setup, as it was designed around a motor that didn't have as much power as the 800MX that you are using. If you make sudden speed changes with what you have, your main gear is liable to strip teeth.

I ran your numbers and it also looks like the 112t helical combo will give you slightly more rpm than the 115 straight gears.

Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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01-10-2015 08:46 PM  3 years agoPost 11
es1co2bar3

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winnetka california

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IMHO, I think you might have issues with the setup, as it was designed around a motor that didn't have as much power as the 800MX that you are using. If you make sudden speed changes with what you have, your main gear is liable to strip teeth.
It won't make much difference but, any speed discrepancy that can be dealt with using the THRT CRV.]

I was waiting on some honey but there aren't no Queen bee,

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01-10-2015 09:25 PM  3 years agoPost 12
stonegate

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alexandria

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Can I use any 112t main gear from other brand such KDE .....
Or has to be 112t helical main gear ,because you mention helical more than two times ,just wondering !
Thank you.

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01-10-2015 10:07 PM  3 years agoPost 13
es1co2bar3

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winnetka california

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Can I use any 112t main gear from other brand such KDE ..... 
Or has to be 112t helical main gear
keep in mind that all heli is different
so you have to have a physical look at them gearing system
before getting b them to put on other brands,
For their demention geometry isn't the same.

I was waiting on some honey but there aren't no Queen bee,

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01-11-2015 12:14 AM  3 years agoPost 14
stonegate

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alexandria

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Gentlemen thank you very much for your helped ,I think these information are good enough for me .
Have a nice weekend ....

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01-11-2015 01:10 AM  3 years agoPost 15
Riq

rrKey Veteran

ND

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Definitely upgrade the main and pinion to slant.
Ive run my non-dfc 700 with a 4035-560/500 and had issues with stripping on the 115t straight gears. I upgraded to the slant 112/12t setup and nothing since. I recently upgraded to the 800mx motor as well and it has a lot more power and needs the "better" gears.

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