AR7200BX from 300x on trex 450?

[jjjjdup]

Hi.
So here's the deal.
I have just started to build a Trex 450 pro DFC.
I want to use the AR7200BX from my Blade 300x.
Can I do this.
If so ( cannot really see why not ), are there any initial changes to make in the AR7200BX before pluging in my esc and servos. Like pulse lengths and servo frequency etc
Please advise as I really don't want to fry anything!

Many thanks guys

[tomatwalden]

AR7200BX from 300x on trex 450?

Not an expert, but you will certainly need to re-setup the BX. For starters, the 300x mounts it upside down, so unless you do the same, you'll need to change the compensation directions.

[jjjjdup]

So I can 100 % use it?

[tomatwalden]

So I can 100 % use it?

The AR7200BX is a general flybarless unit with integrated receiver. People fly all sorts of helis from 300X's to Goblin 700's using them. In principle, there's no reason why you shouldn't use the one from your 300x (which has nothing 300x-specific about it) on a Trex 450.

Like I say, I'm no expert on the AR7200BX (I have a stock one on my 450X, but I've never programmed it), but I do know you'll need to change the compensation directions for a different mounting.

You may need to change other things too, but I can't really say on that. All the documentation on it can be found below

AR7200BX 7-Ch DSMX Flybarless Control System (SPMAR7200BX): Spektrum - The Leader in Spread Spectrum Technology

You might want to try PM'ing James (moonmanflyer) - I believe he's pretty handy with an AR7200BX.

T

[simon1]

of course you can, just make sure your setup is right as said on the beastx

[jjjjdup]

Thanks guys.
I cannot wait to get this heli in the air.
I am also joining a club, so hopefully I'll get some advice there too.
Thanks again

[MarkG_R1]

The AR7200 works well with 450's imo

Make sure you go through the entire beastx setup though

[PaulJC]

And when you do the reset make sure it goes back to Ar7200BX original settings, not the 300x defaults, i get a feeling your servo pulse widths may differ

[jjjjdup]

Thanks Guys.
I have booked a 2 hour lesson with a pro, who will first help me with the setup and then flying.
That way I will also understand the 7200 BX for next time I need to set one up !

[dynoman]

So I can 100 % use it?

simple answer is yes but you should do a factory reset on it to default settings then progress through the menus BEFORE connecting any servos to ensure the basics are correct. Also if you have the USB dongle and Beastx software its easier and you can upgrade the firmware version by going through the spektrum site to request the latest firmware which will be delivered by email (you will need the serial number of the unit).

[waveydavey]

I think the factory settings on the AR7200 for the Blade is a different set of settings than normal ones.

[Bronek]

Re: AR7200BX from 300x on trex 450?

yes you can use AR7200BX with a trex, I have such setup. Couple of things:
1. download beastx manual from http://www.beastx.com/service_manuals.php, setup (pg 32) is better documented than in the spectrum one
2. verify you have version 3 of firmware (first digit) , it's documented in beastx manual pg 8
3. before you start setup, perform factory reset (pg 36)
4. don't attach servos until you have completed step D (pg 42)
5. list of servos with settings for steps B-D is on http://www.beastx.com/service_servoliste.php
6. read setup documentation carefully and make sure you don't get purple light (bad servo throw) in steps E and J. If you do get purple, change servo throw and start again.
7. if step G takes very long, don't worry just try and try again. My "method" is to ensure that swash links are same length and attaching the horns in neutral position before starting setup. Need servo tester for this, to set the neutral position.
8. if you want to use dr2/exp in a transmitter, after completing setup enter parameters (pg 63) and set B to blue
9. as per pg 60, you may want to turn cyclic gain down a bit (for 450 size heli)

[jjjjdup]

Thanks for all the advice.