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250 Class Electric Helicopters 250 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 11-14-2019, 02:04 PM   #41 (permalink)
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No one flying these, I got mine down to 504 grams with lipo and canopy, and close to 4 min flights. curious why not much chatter
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Old 11-15-2019, 01:49 AM   #42 (permalink)
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My guess is the oxy 2 is a more popular heli.

Align realized this and released a heli between the Oxy 2 and oxy 3 in size.

The Align 300x replaces the Trex 250.

Align sat on the same Trex 250 for almost 10 years because no other manufacturer was interested in releasing a heli this size. The Oxy 2 came in a couple of years ago and has dominated this market.

Align knew that had to do something so they released the 300x.

It will be a hard slog to convince people to get the 300x over the oxy 2 and oxy 3.

Align will have to drop the price of the 300x to get more interest
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Old 11-15-2019, 08:12 AM   #43 (permalink)
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I had a lots of trex 250 s and the pain they can be, I think price point is fine, its about the same for the kit version as building a oxy 2, except they come fully assemnbled and have a way way bearing, But lowered price always helps sales. They should sell a empty kit, Im not using any of the stock electronics, what is a big difference is how cheap the parts are, about half of what a oxy cost to fix,.It may be a flooded market with a great oxy helis but hopefully it will gain popularity.

Last edited by Ramtech73; 11-15-2019 at 08:42 AM..
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Old 11-15-2019, 04:27 PM   #44 (permalink)
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I had a lots of trex 250 s and the pain they can be, I think price point is fine, its about the same for the kit version as building a oxy 2, except they come fully assemnbled and have a way way bearing, But lowered price always helps sales. They should sell a empty kit, Im not using any of the stock electronics, what is a big difference is how cheap the parts are, about half of what a oxy cost to fix,.It may be a flooded market with a great oxy helis but hopefully it will gain popularity.
I agree with you but Align is too stupid to realise that selling an empty kit will help sales. There market strategy has always been design a heli around Align specific electronics and rely on customers buying a kit based on value for money for what you get. There is a market for the 300x because cost of spare parts for oxy 2 is going up.
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Old 11-25-2019, 09:59 PM   #45 (permalink)
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Still fighting myself on my next Heli 470 or 300, i like the size of the 300 and the battery choice, i use the same battery in some planks, and quads but people tell me to go bigger, the Align combos come with a Beast. How does the 300 fly? I have only seen the one complaint regarding the bush rods, any thing else? Black Friday sales are comming
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Blade 230S, Nano cpx, nano qx/3dqx/fpv, 200qx MCPX V2, Align Trex 250, 250 DFCplus, Trex 450 plus,Trex 500, JR Forza 450, and more I retired
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Old 11-30-2019, 10:38 PM   #46 (permalink)
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I would say how big is your close flying field?, ether size heli is a great choice.I have a smaller field next to my house, Stk the 300 fly heavy but really stable and short flight times around 3:30, I changed all electronics in mine, its down to around 504 grams from about 580, I got mine up to 4 mins flights even with higher headspeeds. Good news is that parts are cheap and it crashes good, feather shaft, main shaft mostly , blades have made it through 2 crashes un hurt . even still there only 15.99 . so its a great heli, i fly ikon 2, so cant comment on stk gyro, I know one of the guys that work at my local hobby shop complained that his did not roll fast with stk gyro, i don't think its the beast gyro its says miniGRS, plenty fast with ikon 2 , I don't think you would be disappointed.
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Old 12-01-2019, 08:29 AM   #47 (permalink)
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Thanks for the reply. I wish my bank accound aloud me to have both
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Blade 230S, Nano cpx, nano qx/3dqx/fpv, 200qx MCPX V2, Align Trex 250, 250 DFCplus, Trex 450 plus,Trex 500, JR Forza 450, and more I retired
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Old 12-01-2019, 12:25 PM   #48 (permalink)
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accound aloud



?????






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Old 12-02-2019, 06:38 AM   #49 (permalink)
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....account allowed.....
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Old 04-04-2020, 04:20 PM   #50 (permalink)
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If you ask about my opinion on this heli..

I didn't even want to buy it, but it was part of an exchange I found fair enough. Put an ar7200bx in it as all my other helis.

Well, I've owned a total of 18 helis (not counting under 4ch), and it is the first one that flies perfectly out of the box ! No mods, no tail wag, no gearing issues, HW governor holds rpm as it should... Didn't expect it could be so simple

My only comparison in this size was the Blade 270cfx, it was kind of ok, but now testing the Trex:
- More stable
- No more vibration problems
- Less noise
- Servos do not get hot
- The motor doesn't burn my fingers
- Main gear doesn't wobble
- Size of battery is more common

So thumbs up for Align on this one
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Old 04-25-2020, 06:33 PM   #51 (permalink)
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Quote:
Originally Posted by Vladz99 View Post
If you ask about my opinion on this heli..



I didn't even want to buy it, but it was part of an exchange I found fair enough. Put an ar7200bx in it as all my other helis.



Well, I've owned a total of 18 helis (not counting under 4ch), and it is the first one that flies perfectly out of the box ! No mods, no tail wag, no gearing issues, HW governor holds rpm as it should... Didn't expect it could be so simple



My only comparison in this size was the Blade 270cfx, it was kind of ok, but now testing the Trex:

- More stable

- No more vibration problems

- Less noise

- Servos do not get hot

- The motor doesn't burn my fingers

- Main gear doesn't wobble

- Size of battery is more common



So thumbs up for Align on this one
My main shaft has up/down play.

The bec is under powered at 3Amps for rescue on a spirit2 fbl. It browns out.

Elevator link is 5mm too short to get a level swash and 90° servo arms.

Do you have any of these issues?
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Old 04-26-2020, 10:28 AM   #52 (permalink)
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My main shaft has up/down play.
No play at all...

Quote:
Originally Posted by xJoe View Post
Elevator link is 5mm too short to get a level swash and 90° servo arms.
I shortened the aileron links as much as I could and elongated the elevator one as much as I could, just fine. But would you really feel in flight a few degrees of difference? We're not talking about a 700 machine here
I was more concerned about the play in the swashplate, but seems normal in a small machine after all.

Quote:
Originally Posted by xJoe View Post
The bec is under powered at 3Amps for rescue on a spirit2 fbl. It browns out.
Works fine for me, I didn't do any specific test. Do you use original servos?
We do not see people complaining all over the place, maybe yours is weaker than average..
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Old 04-26-2020, 02:40 PM   #53 (permalink)
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I'll have to figure out a way to remove the main shaft slop.

I've replaced the servos and the esc under warranty but it still cannot run the bec test in the spirit-system software.

Yours passed the bec test? Theres another guy on the spirit forum with the same issue.

I've bought a HW 40A/ 7A bec now. Hopefully it's not physically too big/heavy.
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Old 04-26-2020, 06:02 PM   #54 (permalink)
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maybe get rid of the spirt, works great with ikon 2 rescue, no brownouts, mainshaft play u can shim, mine had play is swash plate, but flew just fine. one other thing try running the hobbywing esc bec to HV, goodluck , its a great heli
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Old 04-27-2020, 03:52 AM   #55 (permalink)
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Quote:
Originally Posted by xJoe View Post
I've bought a HW 40A/ 7A bec now. Hopefully it's not physically too big/heavy.
I moved the stock ESC as far back as I could, and still, there is not much more than 1mm gap with the canopy.
So I can't imagine a 40A fitting without modifying the canopy.

What voltage did you select for the BEC?
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Old 05-04-2020, 09:37 AM   #56 (permalink)
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Quote:
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I moved the stock ESC as far back as I could, and still, there is not much more than 1mm gap with the canopy.
So I can't imagine a 40A fitting without modifying the canopy.

What voltage did you select for the BEC?
It browns out less at 6v, and all the time at 7.2v.

I've changed the collective servos for KST215mg and they work fine at all voltages, but they are heavier by 2g each. 6 grams probably won't matter though.

I've also 3d-printed a bottom plate to cover the FBL. and a 5° stand to allow the FBL to be level during pitch measurements.
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Old 05-04-2020, 09:45 AM   #57 (permalink)
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Quote:
Originally Posted by xJoe View Post
It browns out less at 6v, and all the time at 7.2v.
Maybe you had a hungry servo

Quote:
Originally Posted by xJoe View Post
... and a 5° stand to allow the FBL to be level during pitch measurements.
With a BeastX you also need a mirror to see the LEDs

My table is not level anyway. When the frame and CNC parts are ALIGNed with precision, I use the top of the motor as reference, in each direction at a time.
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Old 05-06-2020, 06:36 AM   #58 (permalink)
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Maybe you had a hungry servo
That's what I thought. I replaced all servos and the ESC under warrenty, but the issue remained.
There's a few others on the Spirit forum that also see this issue, so I put it down to the ESC being under powered.

If I connect the 4 servos to a servo tester powered by either the Align 3A ESC BEC or a Talon35 3A bec, the servo tester also browns out, so my conclusion was the Align-supplied ESCs are too power-hundry for 3A BECs.

I too use the motor as a zero-degree level surface. Much easier with this (if you have access to a 3D printer) :

https://www.thingiverse.com/thing:4334888

and an FBL cover:
https://www.thingiverse.com/thing:4334910
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Old 05-09-2020, 07:27 AM   #59 (permalink)
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Be aware - the supplied ESC (RCE-BL25A) almost cost me a major crash yesterday.
I was doing tic-tocs with 85% throttle in the default GOV mode.
Suddenly the motor stop working completely. Not lowering RPM so you can at least land but nothing at all!
Servos worked fine, but without a running motor at this size it's very hard to do auto-rotation and I'm not an expert at this (at the simulator I am, but not in real life )
I was practicing very high when doing the tic tocs so at least I had time to understand what happened and react. Wasn't a smooth landing at all, but I was able to at least land it on the skids in a good orientation. Skids broke a little bit so I will replace it. Other than that no damage to my luck.
Few things to point out:
The Whether is hot in my country however it was a windy day, but apparently the wind didn't help. Running 7.4V BEC and I read the comments here - maybe it stretched the ESC as well, I'm not sure if it is a separate component completely inside.
Currently both motor and ESC seems to work like before, so it's not a burn out. When I "land", I had at least 2 more minutes to fly, battery was avg at 3.87 per cell when I tested it later. Also fresh battery with another 3 packs I bought and flow before, so for sure not a battery issue.
My guess is that the ESC reach maximum temperature - what do you guys think?

As for now I lowered the BEC back to the 6V default and also won't fly with more than 75% throttle, but I'm thinking on getting a better ESC. I already have the hobbywing program box, so I prefer to go with hobbywing.
@xJoe did you received the HW 40A/ 7A BEC? If so does it fit?
Any other recommendations from people who changed the default ESC?
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Old 05-09-2020, 10:08 AM   #60 (permalink)
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I have one of these on the way and was also wondering about the esc. Asked on another post if a castle 35 would be better suited for this bird but haven’t heard a response... any input or suggestions would be appreciated.
Thanks.

Jay.
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