Brushless MSRx

[Daryoon]

Could you correct your summary. I re-weighted the stock mSR X motor and it's 6.35g.

The magnets in the motor was attracting something in the scale and the reading was different depending on if the magnet in the motor was facing down or up on the scale.

Isolating that with a thick plastic tray and tare that out. I got a consistent reading of 6.35g for the stock mSR X motor. (with it's plug and 8 teeth pinion attached)

[new bee]

Originally Posted by Metal

Still learning so forgive me if I dont know all the motor numbers etc. but from reading in the mCP X BL threads, the 915 is the motor I am leaning towards for that heli. I am still a ways off of doing a BL, since getting some required goods and parts is higher on the priority list, and hope to learn more about this subject in the near future.

You can't go wrong with the 915 but to tell you the truth I sold mine and replaced it with an hp08 16500kv and can't tell the difference. I only sold the 915 to help fund my little business venture and really thought it to be the best motor for mcpx but now I know that it at least has an equal. Wish I had them both for side by side comparison.

[burnoutboy]

Originally Posted by new bee

What do you guys think about the new hp03s? Its like 158kv. Overkill for msrx? I was thinking about getting some with my next order since I feel this would be a better motor for the mcpx. I need to get off the computer and get a 13500kv stuck in one of my heli's to see how it acts. I am thinking since it is so light it may not have the torque for mcpx. But the larger kv motor just might be a nice indoor mcpx. That is what I am after on my next personal build. Sold mine super light and able to run off the OverSky 300 mah 35c batts.

Get one and send it to me, I'll beta test it for ya

[billj747]

Originally Posted by Daryoon

Could you correct your summary. I re-weighted the stock mSR X motor and it's 6.35g.

The magnets in the motor was attracting something in the scale and the reading was different depending on if the magnet in the motor was facing down or up on the scale.

Isolating that with a thick plastic tray and tare that out. I got a consistent reading of 6.35g for the stock mSR X motor. (with it's plug and 8 teeth pinion attached)

I edited the summary on post #37.

Does anyone have the weight of the 200mAh 1S 25C vs. 30C? Is there a weight or performance difference with a BL motor in terms of power vs. longevity?

[burnoutboy]

More power AND more longevity over a brushed motor. I'm confused... you posted the weights already in your summary post. What exactly do you mean.

[billj747]

Originally Posted by burnoutboy

More power AND more longevity over a brushed motor.

Sorry if I wasn't clear. I meant the performance or weight difference between a 25C 200mAh E-flight battery vs. the 30C 200mAh E-flight battery on a BL motor.

Does the 25C last longer than the 30C?
Does the 30C give a BL motor noticeably more power (or weigh more) than the 25C?

[burnoutboy]

In theory a 30C is CAPABLE of giving more power faster. It's capable of discharging at a rate that's 120% the rate of a 25C cell. That said the difference isprobably negligable unless you run at full throttle most of the time. I'd run the 30C as it's lighter AND capable aof a faster power delivery.

[billj747]

I know in my summary the 30C was lighter -but that was someone weighing it and the 25C was listed as 7g on HH which might be rounded up. Can anyone confirm or back to back the 25C vs. 30C's weight on the same scale?

[burnoutboy]

The weight of the 25C I wrote in my post was from my digital scale not from the website so I guess tha's a confirmation that it's exact. I can't comment on the 30C as I don't have one... yet.

[Daryoon]

Originally Posted by billj747

I edited the summary on post #37.

Well, this is embarrassing. Something about the strong magnets in the motor messes with my scale.

This time, I isolated with a 3/4" block of wood. Tare out the reading and finally got a more accurate result.

The mSRX motor actually weights 5.7g. A much better result.

The Bravo SX motor weigh 5.05g with the 8teeth pinion and connector.

[motoracer5]

The 30c E-filte worked better for me than the 25c. There will be a difference at all throttle levels as it will have less voltage drop under load and be more efficient. The difference is not that much though. Look into some Hyperion 250's, oversky 300 35c or Nano 300 if you want better batteries for less money.

[billj747]

Originally Posted by Daryoon

Well, this is embarrassing. Something about the strong magnets in the motor messes with my scale.

This time, I isolated with a 3/4" block of wood. Tare out the reading and finally got a more accurate result.

The mSRX motor actually weights 5.7g. A much better result.

The Bravo SX motor weigh 5.05g with the 8teeth pinion and connector.

I re-edited the Summary in Post #37. I don't suppose you have the weight of the Nine Eagles Pro Solo motor do you?

I also added to the summary more information.

[Daryoon]

@billj747: I did...but I don't know where I put it.

Regarding the brushless mSR X. Got mine done. And my thoughts? It's how it should have came from the factory.

With the added power, you can finally get the acceleration necessary to get out of trouble. I finally get to fly it hard, fast and by the seat of my pants. When you sense trouble, you can now give power and maneuver out of it. Prior to BL, the brushed motor didn't have enough power so I always ended up in the ground.

Definitely worth the upgrade. I still crave for more power. Perhaps that HP03s 15800kv isn't too powerful after all.

I am getting between 4m10s to 4m30s out of the Eflite 150 25c. Heli without battery weighs 24.42g. So I am happy with that.

[billj747]

@Daryoon: What BL motor/esc did you go with and did you do it yourself?

[Daryoon]

I used a HP03s 13500KV with a XP3A. I flashed the 3.4 tail firmware and used these settings by Dylan:



The signal wire is soldered to the leg of the transistor as others have done.

I created a mount out of .8mm CF that not only mounts the motor, but also braced the whole frame. This helps offset the fact that we have to cut part of the main frame to fit the BL motor.

[kurmet]

i have a hp03 15800 on order lets see what will do should be hear soon

[new bee]

Patiently awaiting your findings

[Daryoon]

Not sure if there's much DIY'ers on this forum. Here's my approach to the mount. The stock frame is stiffen up without much added weight.

[kurmet]

it takes for ever from china

[new bee]

Originally Posted by kurmet

it takes for ever from china

I know regular shipping could be a month. That is why I put patiently waiting ;-)