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Apr 10, 2019, 03:43 PM
flyin' fool
goldguy's Avatar
Thread OP
Discussion

Small Size / Big Power ..............


Like em' small??

Here's an inexpensive power plant that will haul your little birds around with gusto...…………….. the Racestar BR1407/3500kv from BangGood. It weighs in at 17 grams, will spin a 5X3 GWS type prop on 2S lipos sucking 6.9 amps on 7.4 volts for 52 watts in. Got the 11 gram BR1306 to check out too.

I make the backplate mounts from Lexan using short 2mm countersunk screws or if you've got a FB with printer, then lean on him. It's a smooth runner, uses less amps on the same setup than my other 13/14 mm sized motors and not as loud.

Here's my first install ……………. It's a 80% 22" span Jupiter Shrimp at 5.5 ounces RTF and puts out more thrust as weight for absolutely glorious flying.
Last edited by goldguy; Apr 10, 2019 at 06:04 PM.
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Apr 10, 2019, 04:34 PM
treefinder
springer's Avatar
Haven't tried that one, (maybe next indoor season!) But I have been impressed with the Racestar motors I have bought. I got 2212s in 1k, 1300 and 2450 kg ratings. The 1300 is a great mid size motor on my Canard 48. Just put the 2450 on a 48" span blended wing plane with a 6x4 AOC style prop. Very interesting. It pulls the somewhat draggy airframe smoothly and well. I will probably try thec1300 kg one on it as well and put the 2450 on a sleeker airframe for grind. Best of these is they are usually on sale for $4.99!
Apr 10, 2019, 06:07 PM
flyin' fool
goldguy's Avatar
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I meant to say 'inexpensive' and if you buy two you get 10% off.

Got the 1306s now as well.
Apr 10, 2019, 08:34 PM
treefinder
springer's Avatar
I noticed that! Sometimes autocorrect drives one crazy! but you are right, the race stars seem all to be good, inexpensive motors.
Apr 14, 2019, 07:09 AM
gpw
gpw
“There’s no place like Foam”
gpw's Avatar
You know , with the Drone popularity , it would seem motor technology and production has been much refined as of late …
Thanks for the update as it's been ages since we bought a new motor ( Blue wonders )
Latest blog entry: Lost plans
Apr 14, 2019, 09:24 PM
flyin' fool
goldguy's Avatar
Thread OP
Correct. Many of the new small drone motors have 12 teeth and 14 magnets for more power along with efficiency, as well as quality material like Japanese bearings, stator materials, mag wire and high temp magnets.

Plus, half the price of the BW.

Here's an example ………………. https://www.banggood.com/DXW-2207-D2...r_warehouse=CN

I got TWO for $12.12 CDN 'on sale' and was totally blown away by it when it arrived.
Apr 15, 2019, 07:25 PM
flyin' fool
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Here's the goods on the 11 gram BR1306/3100kv ……………….. 5x3 on 2S = 5.5A / 7.4 V / 41W
Last edited by goldguy; Apr 16, 2019 at 01:48 AM.
Apr 15, 2019, 08:58 PM
Registered User
Can you get a prop savor on these drone motors?
Apr 16, 2019, 01:59 AM
flyin' fool
goldguy's Avatar
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Prop savers don't work on the small thin props used, if used you would break more props. The extra stress of the 'O' ring will cause them to bend/break at the slightest impact. The picture shows the tools I use to change props and it's something I don't do very often, even flying off pavement without wheels.

Just to be covered in the event I do, I usually buy about 40 GWS type orange props at a time they are so inexpensive at the 10X price at BG. Grass is the biggest enemy of small props.

The CEO of GWS said in an interview that the props are orange and thin for safety reasons. Makes sense. You should see my FB's arm from an accident in his shop with a CF one last week.
Last edited by goldguy; Apr 16, 2019 at 02:09 AM.
Jun 02, 2019, 09:33 PM
flyin' fool
goldguy's Avatar
Thread OP
Turbo 'T'...………………..

Went with a 6X3 prop on my BR1407 powered lil' Trottel with spectacular results. It now produced more thrust then my Sunnysky R1406 spinning a 5X3 with near the same readings. Kind of a surprise considering the price difference.

Racestar BR1407 3500kv on 2S spinning a 6X3 prop ............… 9.8A, 7.16V, 72.5W

Sunnysky R1406 3300kv on 2S spinning a 5X3 prop ……………. 9.3A, 7.3V, 70W

Did the swap on my Crack Wing as well. It really ramped up the fun.
Jun 12, 2019, 02:57 PM
Registered User
PaulB's Avatar
Just ordered one of each, 1 for an indoor 60 cm EPP JAK (the small one) and the larger one for my (need to print a new one) Pattaya, now the wait.

Paul
Latest blog entry: Just To Say Hello.......


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