Axe CP going brushless

Axe CP going brushless
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Axe CP going brushless - 1/15/2007 9:31:18 PM

dfalcon

Posts: 214
Joined: 10/26/2004
From: Bozeman, MT, USA
Status: offline

Finally ordered a brushless motor and esc today for my axe. I found a Himax 2025-4200 over at rcgroups for a fairly low price, and I ordered a Heli-max 25A esc and a 9T pinion from tower. Can't wait!!

Post #: 1

RE: Axe CP going brushless - 1/15/2007 9:35:43 PM

MsDarla

Posts: 232
Joined: 4/10/2006
From: Westland, MI, USA
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Awesome

The helicopter reminds me of the Falcon 3D.
http://www.hobby-lobby.com/falcon.htm

(in reply to dfalcon)

Post #: 2

RE: Axe CP going brushless - 1/15/2007 9:48:45 PM

dfalcon

Posts: 214
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From: Bozeman, MT, USA
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Actually, the Falcon3D with it's driven, gyro/servo-operated tail is more along the lines of a shogun/zoom/mx400. I had a Shogun V1 about 6 months ago (shaft driven tail version, not belt driven tail), and it was a maintenance nightmare. I didn't even have to crash that thing and something would break. That happened about 4 times, and I got tired of it and sold it.
But back to your point, yeah, the Axe with it's full-body frame (the first thing I noticed and fell in love with) does look more like the Falcon although it functions more like a Blade.

(in reply to MsDarla)

Post #: 3

RE: Axe CP going brushless - 1/16/2007 12:34:09 PM

DscottM83

Posts: 81
Joined: 12/31/2006
From: Detroit, MI, USA
Status: offline

for 100 more the falcon looks like a steal, wish i would of knew about it earlier

(in reply to dfalcon)

Post #: 4

RE: Axe CP going brushless - 1/16/2007 7:21:08 PM

PilotLight

Posts: 817
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From: Benton Harbor, MI, USA
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quote:

ORIGINAL: DscottM83

for 100 more the falcon looks like a steal, wish i would of knew about it earlier

You could always sell on classifieds or ebay and re-up. With Tower's supply backup, I bet it will sell pretty quick.

I'm keeping mine.

(in reply to DscottM83)

Post #: 5

RE: Axe CP going brushless - 1/16/2007 8:08:37 PM

DscottM83

Posts: 81
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From: Detroit, MI, USA
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Its on ebay now, thanks

(in reply to PilotLight)

Post #: 6

RE: Axe CP going brushless - 1/17/2007 2:33:24 AM

Heliko

Posts: 591
Joined: 1/16/2007
From: Long Island, NY, USA
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The Falcon looks like a great little bird. It's very smooth in the vid. It looks a bit more intricate then the AXE which may mean more damage in a crash, but my only real concern would be parts availability as it seems that many parts aren't available till next month. Also Hobby Lobby seems like the only place you can get it or the parts. I guess I've heard the all your eggs in one basket saying too many times.

Either way good luck with it.

Getting back on track though, don't forget to post when you get the brushless set-up working Mr. thefalcon. I was thinking of brushless conversion too.

< Message edited by Heliko -- 1/17/2007 2:36:51 AM >

_____________________________

"Gravity is a harsh mistress." The Tick

(in reply to DscottM83)

Post #: 7

RE: Axe CP going brushless - 1/17/2007 5:05:33 AM

dfalcon

Posts: 214
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From: Bozeman, MT, USA
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You could most likely use shogun, zoom, or mx400 parts on it [Falcon]. They're all pretty similar.

< Message edited by thefalcon -- 1/17/2007 3:03:31 PM >

(in reply to Heliko)

Post #: 8

RE: Axe CP going brushless - 1/17/2007 2:31:47 PM

DscottM83

Posts: 81
Joined: 12/31/2006
From: Detroit, MI, USA
Status: offline

quote:

ORIGINAL: Heliko

The Falcon looks like a great little bird. It's very smooth in the vid. It looks a bit more intricate then the AXE which may mean more damage in a crash, but my only real concern would be parts availability as it seems that many parts aren't available till next month. Also Hobby Lobby seems like the only place you can get it or the parts. I guess I've heard the all your eggs in one basket saying too many times.

Either way good luck with it.

Getting back on track though, don't forget to post when you get the brushless set-up working Mr. thefalcon. I was thinking of brushless conversion too.

Thanks, the AXE sold very quickly on ebay with a BIN, ill report back with how this bird compares with the AXE. Falcon is on order now.

(in reply to Heliko)

Post #: 9

RE: Axe CP going brushless - 1/17/2007 3:58:03 PM

outtamyway

Posts: 108
Joined: 11/17/2006
From: tallahassee, FL, USA
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Wow, look at this price... Falcon 3d

That is with 2 sets of Carbon Fiber Rotor Blades, LiPoly, HH Gyro, Brushless, Heat Sinks, Training Wheels etc.

(in reply to DscottM83)

Post #: 10

RE: Axe CP going brushless - 1/17/2007 4:05:47 PM

dfalcon

Posts: 214
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From: Bozeman, MT, USA
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Wow! Maybe I'll sell the brushless Axe (as soon as it's put together) and buy that!

(in reply to outtamyway)

Post #: 11

RE: Axe CP going brushless - 1/17/2007 4:21:34 PM

outtamyway

Posts: 108
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From: tallahassee, FL, USA
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I thought you already owned a Falcon?

(in reply to dfalcon)

Post #: 12

RE: Axe CP going brushless - 1/17/2007 4:30:21 PM

dfalcon

Posts: 214
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From: Bozeman, MT, USA
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nope.

(in reply to outtamyway)

Post #: 13

RE: Axe CP going brushless - 1/18/2007 4:35:05 PM

PilotLight

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From: Benton Harbor, MI, USA
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Mr. thefalcon,

Not sure how you determined the proper Kv motor size and pinion size, but here is a calculator from another Heli enthusiast. Not sure of the accuracy, but who knows, maybe its been tested.

Looking forward to hearing of your successes and recommendations.

http://dhrc.rchomepage.com/calcAdvanced.htm

(in reply to dfalcon)

Post #: 14

RE: Axe CP going brushless - 1/18/2007 4:57:44 PM

dfalcon

Posts: 214
Joined: 10/26/2004
From: Bozeman, MT, USA
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Thanks, that's pretty handy and worth bookmarking. I've already begun to think that I might need a larger pinion at some point in time, when I'm comfortable with inverted hovering enough to try some more intensive 3D stuff.

Just by making sense of things on my own, I initially used (motor kV) * (approx. loaded battery voltage) * (pinion teeth) / (spur teeth) = rpm. Using this with 10.5V (I don't expect the motor to be working too hard and drawing the voltage down too much), 9T pinion, 4200kV Himax 2025, and 180T spur, I got 2205 rpm's. I trusted myself and ordered the components based on this information.

Then I found an equation here at helihobby, and thought 'Uh, oh!' when I first saw it. But it still gave me the same result:

(Target Head Speed x Main Gear Teeth) / (Motor Kv x Voltage x Percent Motor Efficiency) = Pinion Gear Teeth
(2000rpm * 180T) / (4200kV * 11.1V * 85% efficeincy) = 9.08-tooth pinion

When I've finally advanced beyond the basics, I'll probably go with an 10T or 11T pinion to get somewhere around 2400 to 2600 rpm's. But 9T will be a good starting point for the motor I've got.

< Message edited by thefalcon -- 1/18/2007 4:59:00 PM >

(in reply to PilotLight)

Post #: 15

RE: Axe CP going brushless - 1/18/2007 7:08:01 PM

PilotLight

Posts: 817
Joined: 8/15/2003
From: Benton Harbor, MI, USA
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quote:

When I've finally advanced beyond the basics, I'll probably go with an 10T or 11T pinion to get somewhere around 2400 to 2600 rpm's. But 9T will be a good starting point fo