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Old Jul 11, 2008, 02:18 PM
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TGY DP 3a 1 Gram Brushless ESC ($20!)

Has anybody started a thread on this little guy yet? I'm tempted to start building some micro flyers that don't involve me stripping down more Aero Aces or my Piloto. Do they also carry cheap RXs, servos, and accuators? Haven't looked yet.

http://www.hobbycity.com/hobbycity/s...idProduct=7184
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Old Jul 11, 2008, 03:13 PM
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I've ordered one (along with their new <5gm brushless motor), it has shipped, but hasn't arrived yet. Really looking forward to this.

Tim
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Old Jul 12, 2008, 01:29 PM
TheyreComingToTakeMeAway!
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bah, its only a single cell controller. it wont work for any bl edfs or anything like that.
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Old Jul 12, 2008, 06:05 PM
Team30 Micro EDF
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Quote:
Originally Posted by derk
bah, its only a single cell controller. it wont work for any bl edfs or anything like that.
Correction: It won't work for any 2 cell bl edf's....
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Old Jul 12, 2008, 06:35 PM
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Bidproduct has what appears to be the same controller AND a 2g motor...Hummmm..??

http://bidproduct.com/part/Product_v...%20ESC_95.html
http://bidproduct.com/part/Product_v...MOTOR_238.html

I've had problems with small single cell brushless setups in the past. They didn't like starting the motor consistently. I had a Microbatics controller that worked with the motor, but only worker properly with the Microbatics RX and then someone offered me $100 for the controller (guess what happened to the controller).

Do I assume that the bidproduct combo has actually been tested, or do I assume too much??
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Old Jul 12, 2008, 07:11 PM
Team30 Micro EDF
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Hopefully, Tim C will give it a good work out and let us know the results.
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Old Jul 12, 2008, 07:46 PM
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Quote:
Originally Posted by NitroCharged
Hopefully, Tim C will give it a good work out and let us know the results.
I'll gladly report on the ESC when it arrives (supposedly shipped on the 10th).

Now that 2gm motor sure looks inviting - I'll have to consider it soon. What a combo my 1gm MicroInvent Rx, 2 1.6gm Falcon servos, 1gm ESC, the 2gm motor, 100mah cell would make - the possibilities would be intriguing.

What I'd really like to see is someone come up with a lightweight small brushed esc output to brushless esc input converter so I could hook this 1 cell brushless esc up to a Parkzone cessna brick. Seems like it would an easy thing to build out of a simple microprocessor (just converting a high frequency brushed esc output PWM into a servo PWM input - one input, one output, simple program?).

Tim
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Old Jul 12, 2008, 08:09 PM
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Quote:
Originally Posted by Tim Cullip
I'll gladly report on the ESC when it arrives (supposedly shipped on the 10th).

Now that 2gm motor sure looks inviting - I'll have to consider it soon. What a combo my 1gm MicroInvent Rx, 2 1.6gm Falcon servos, 1gm ESC, the 2gm motor, 100mah cell would make - the possibilities would be intriguing.

What I'd really like to see is someone come up with a lightweight small brushed esc output to brushless esc input converter so I could hook this 1 cell brushless esc up to a Parkzone cessna brick. Seems like it would an easy thing to build out of a simple microprocessor (just converting a high frequency brushed esc output PWM into a servo PWM input - one input, one output, simple program?).

Tim
If its a 2khz PWM motor output there are converters made to generate a standard PWM signal to drive a brushless ESC. Lots of people use them to convert the Walkera 4#3 helicopter to a brushless main motor, it runs on 1S Lipo.

I also have two of the 1 gram ESCs and two of the 2 gram motors coming, I am going to see if they can be used for tail drive on the Walkera 4#3 helicopter. Reliable starting is the challenge. I have a brushless 1S esc that starts the small motors 100% of the time perfectly but you need to assemble it yourself.
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Old Jul 13, 2008, 04:43 AM
A.K.A sir Crashalot
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what 2 gram motor... what have i missed ??

/Ulf
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Old Jul 13, 2008, 09:38 AM
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this one: http://bidproduct.com/part/Product_v...MOTOR_238.html
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Old Jul 13, 2008, 09:48 AM
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Dang it. Ordered 'em both since they were in the cart

Added a note to my PP payment for the 3300 KV motor since I saw no other way to specify my choice.

Got a confirmation e-mail the next day. Will ship on 7-22 and take 12-22 days. I've also got nothing to put it in LOL.
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Last edited by Tim Wolff; Jul 15, 2008 at 07:25 PM.
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Old Jul 15, 2008, 05:09 PM
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anyone received a 2gram motor or esc yet?
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Old Jul 15, 2008, 07:28 PM
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I received the ESC and motor (the 5gm motor from UH, not the 2gm from the paypal site).

Here is some very preliminary impressions and measurements.

The ESC is tiny! Without any wires attached, the board is 0.8gm, with a connector and wires to attach it to my Falcon Breeze block it weights 1.0gm.
It could be made even lighter if you removed all connectors and soldered the wires directly to it - but I'm not going to bother with that.

The motor without mount is 4.8gm and with mount it is 5.0gm, include a parkzone cessna prop and it tops out at 5.3gms.

I don't have a fully charged single lipo cell, but I did hook it up to one that was at about 3.6v and the motor ran at 8000rpm on a GWS 3x3 (didn't measure the rpm of the cessna prop yet). Haven't hooked up a watt meter yet to see what amps it pulled (I'm pretty sure it is under an amp).

Start up and throttle response was pretty smooth (most of the time, some times the motor wanted to cut out above 3/4ths throttle, but I think it was something in the connections rather than an inherent problem of the motor/esc combo - but I'll have to investigate it further to convince myself of that. Haven't even read the manual yet to see what programming features are available for the ESC (timing is the main thing I'll look into).

Overall, I'm very pleased with the ESC and would buy more of them in the future. The motor is nice, but 5gm motors aren't that hard to come by these days and it'll take more time and testing before I am convinced it is something special.

I'll report later when I've run more tests (various props, amps, thrust, etc).

I'm real tempted to order one of the 2gm motors, I think that weight motor with this 1gm ESC would be quite a combo (especially if you hooked it up to a MicroInvent receiver and used actuators - you could have a whole flight system rx/esc/motor/battery/actuators at about 7gms).

Tim
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Old Jul 15, 2008, 07:36 PM
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By the way, this is the motor I'm referring to: AD-C5 Micro Motor 4.6g Weight 3700Kv
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Old Jul 16, 2008, 01:34 PM
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thanks for the report Tim. I am gutted the 2 gram motors sold out before I ordered. They would be perfect for my plantraco servo rx and two toki servos aswell . Its amazing how quickly these brushless motors are being developed.

I brought the turnigy 4.5 gram motor from HC last month and thought 'great' but a two grammer! WOW!
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