Author Topic: TowerPro BM2408-21T combo  (Read 7489 times)

Offline leonardofibonacci

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TowerPro BM2408-21T combo
« on: August 22, 2008, 08:37:22 PM »
Da li neko poseduje combo, koji se prodaje u Space-u? Zanima me kakav je, kakve su mu specifikacije? http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4852&Product_Name=TowerPro_BM2408-21T_/_18A_BEC_/_1047_Prop_Combo
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Offline n3mke

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Re: TowerPro BM2408-21T combo
« Reply #1 on: August 22, 2008, 08:43:59 PM »
A bre ti sve isto kupujes ko ja :) dobro je stanice nam bar nisu iste ;)
I ja cu kupiti taj kombo, tako da i mene interesuju specifikacije, nesto mi je cudno da tako lak motor moze na spree, a i ne znam kako to da se nabudzi, posto ako se prikaci direktno za sper ne moze da se stavi onaj plastichni deo koji ide preko, a na postojeci drzac ne moze.

Offline leonardofibonacci

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Re: TowerPro BM2408-21T combo
« Reply #2 on: August 22, 2008, 09:15:55 PM »
Pa, svakako, ces morati da napravis novi nosac. Ja sam u glavi planirao malo i zakljucio sam da se, najpre, mora promeniti firewall, pa se, potom, na njega napraviti odgovarajuci nosac. Btw, koju stanicu koristis?
За живот ми мало треба: клавир, хлеб и парче неба!

Offline n3mke

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Re: TowerPro BM2408-21T combo
« Reply #3 on: August 22, 2008, 09:22:04 PM »
Pa izgleda da ce morati tako, nadam se da ce neko iskusniji da nam pomogne u toku izrade..
Stanica je jr sport sx600

a za ono sto si mi uzeo punjac ispred nosa ima da ti ometam signal   ;D ;D ::)

Offline leonardofibonacci

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Re: TowerPro BM2408-21T combo
« Reply #4 on: August 22, 2008, 09:45:26 PM »
Zadovolji se time sto imas bolju stanicu . . . :P
За живот ми мало треба: клавир, хлеб и парче неба!

Offline Goran

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Re: TowerPro BM2408-21T combo
« Reply #5 on: August 23, 2008, 09:29:53 PM »
Evo specifikacija:

http://www.brchobbies.co.uk/?page=shop&item=184

TowerPro BM2408-21T (130W) Brushless Motor & BRC 20A ESC COMBO DEAL.

A powerful outrunner brushless motor supplied with a 15-20A brushless ESC. This motor/esc combo is ideal as a '400' replacement and will give a large power boost over a standard 400 brushed motor. Motor mount is also included (plastic needs to be drilled for motor). Please note: gold connectors ae not supplied with this motor/esc combo deal!

We also include one of our Free BRC HOBBIES 'Prop Data' sheets giving you exact set up details and props required depending on battery/prop/model.

MOTOR SPECS:
* Weight: 48g
* Diameter: 30.5mm
* Length: 31.7mm (excluding shaft)
* Output Shaft Dia: 3mm
* Nominal current: 8-13A
* Lock Nuts supplied for fitting GWS type props
* Suggested prop: GWS 7 x 3.5 Hyper-Drive on 3S Li-Po

Also included in this deal BRC 20A Brushless ESC (with powerful 2A BEC) handles 2-3S lithium or 6-10 Cells Ni-xx. Features auto cell detect and auto cut-off detect!

Type: BRC-20A
* Size: 35 x 24 x 7mm
* Current: 20A Max
* BEC: Yes (2A)
* PWM: 8 KHz
* Cut-off: auto-detect and set, 5.8V for 2 cell lipo, and 8.8V for 3 cell lipo.
* Input: 2-3S Li-Po or 6-10 Ni-xx

Brushless Motor & ESC upgrade for SPEED 300-400 type models, applications include: Aerobatic, Sport, 3D, EDF, Pylon, Glider & Parkflyer type models or any model where a 400 motor is recommended.

Komentar 2:

owerPro BM2408-21T / 18A BEC / 1047 Prop Combo
Posted 18-01-08 at 06:50 PM by ultralajt
Hi!

I just buy this combo as it is cheap for 18 amps and >100watts.
I did not decided yet where it I install, but the closest choices are my Carbon Butterfly parkflyer od brand new designed foammie aerobatic flyer (it is only on paper at the moment).

But back to the TowerPro BM2408-21T!
http://www.unitedhobbies.com/UNITEDH...idProduct=4852

I feel, that moving the motor wires back&forth, can damage the tiny copper wires, that goes in to the motor.
So, I decide to make some more stiff connection of that wires to the body of motor.

I use a common sewing thread and some CA glue dropplets to reinforce that particular part. I wrap the sewing thread around rear aluminum base of the stator and around all 3 electrical wires.
Now the wires stays at that point and dont move anywhere. I am sure, that no breakage of the wires will occur after that "improvement".

Motor: BM2408-21T

BESC: 18A
Current: 18-25A
BEC 3S Lipo
Size: 43x38x10mm / 20grams

Propeller: 1047 (same as GWS 1047)

Pozdrav Goran

Offline leonardofibonacci

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Re: TowerPro BM2408-21T combo
« Reply #6 on: August 23, 2008, 10:38:02 PM »
Hvala na detaljnim specifikacijama.
За живот ми мало треба: клавир, хлеб и парче неба!

Offline zgrujic

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Re: TowerPro BM2408-21T combo
« Reply #7 on: August 25, 2008, 12:37:37 PM »
Za taj tvoj combo ne mogu nista da ti kazem.
Ja imam ovaj:
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4709

Mogu da kazem samo najlepse stvari o njemu. Pouzdan jak lak...
Jedino sto ona siva plastika koju dobijes uz njega ne moze da se montira nigde.

Nesto je jaci nego taj tvoj.

Offline fenix

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Re: TowerPro BM2408-21T combo
« Reply #8 on: August 25, 2008, 11:38:35 PM »
2408-21T je motor koji je izuzetno dobar u sto sam se i ja uvjerio.O ovome motoru i na inostranim sajtovima nailazite na rijeci hvale.Sa elisom 8x4 je najbolja kombinacija.Njega sam ugradio na WD  http://rcfly4um.org/index.php?topic=298.0 ali zbog raspolozivog prostora koristim elisu 7x5 ili 7x4 sa baterijom od 1100 mAh vuce model tezine 1140gr :o 10 mini. i to na pola gasa.O cijeni motora ne treba diskutovati tako da ovdje stvarno ne vazi ona koliko para toliko i muzike jer se muzike stvrano u ovom slucaju dobije mnogo vise ;)
« Last Edit: August 25, 2008, 11:40:21 PM by fenix »
The sky is the limit.

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Offline dandza

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Re: TowerPro BM2408-21T combo
« Reply #9 on: August 27, 2008, 11:24:30 PM »
Posto je ovaj combo u Space-u?

Offline n3mke

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Re: TowerPro BM2408-21T combo
« Reply #10 on: August 28, 2008, 12:21:38 AM »
cini mi se 2100 dinara... :)

Offline leonardofibonacci

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Re: TowerPro BM2408-21T combo
« Reply #11 on: September 18, 2008, 08:28:59 PM »
Evo, kupio sam combo i ,kako sam naveo, dobar je. Nemke, cik da vidim, kako ces spojiti ESC sa baterijom i motorom, bez produzavanja vodova ;). No, Kada je motor pri punoj snazi, uticu ogromne ziroskopske sile na nj. (sto sam i pretpostavio, zato i volim inrunner vise). Znam da su lovci I svetskog rata imali ogroman problem sa ziroskopskim silama, zbog rotacionog motora. Moje pitanje je, kako se to odrazava na kontrolu i upravljivost modela, pogotovo, kada je veci motor?
За живот ми мало треба: клавир, хлеб и парче неба!

Offline Lazo

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Re: TowerPro BM2408-21T combo
« Reply #12 on: September 18, 2008, 10:25:04 PM »
Ziroskopske sile motora i elise su prema ostalim gabaritima i silama koje se javljaju na krilnim i repnim povrsinama modela, u takvom odnosu, da ih neces ni primeteiti u letu.

Pozdrav
Smrt fašizmu - Sloboda na aerodromu!

Offline zgrujic

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Re: TowerPro BM2408-21T combo
« Reply #13 on: September 22, 2008, 12:04:27 PM »
No, Kada je motor pri punoj snazi, uticu ogromne ziroskopske sile na nj. (sto sam i pretpostavio, zato i volim inrunner vise). Znam da su lovci I svetskog rata imali ogroman problem sa ziroskopskim silama, zbog rotacionog motora. Moje pitanje je, kako se to odrazava na kontrolu i upravljivost modela, pogotovo, kada je veci motor?

Vidis, nisam nikad razmisljao o tome, a letim onaj moj motor (par postova iznad), koji je veci od tvog, vec godinu dana i nisam primetio da se tu nesto desava. Cesto radim luping pod punim gasom i postizem tako uske petlje koje sigurno ne bi bilo moguce napraviti da se ziroskopske sile znacajnije opiru. U svakom slucaju preovladjujuci doprinos efektu ziroskopskih sila verovatno potice od propelera, a to ne mozes da smanjis.

Sad kad si me ovako potakao na razmisljanje pocinjem da mislim da je ovaj efekat u stvari dobar jer ce pomoci modelu da bolje drzi pravac kad nije najbolje natrimovan.

U celoj prici najgora je centrifugalna sila. Ako propeler nije najbolje izbalansiran ili montiran imaces problema sa ozbiljnim vibracijama koje mogu da rastresu model. Preporucujem da tom motoru skratis osovinu i propeler montiras sto blize (proverena preporuka od Laze) telu motora.

Offline leonardofibonacci

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Re: TowerPro BM2408-21T combo
« Reply #14 on: September 22, 2008, 09:21:32 PM »
U potpunosti ste u pravu, sto se tice osovine, stavise, ona je, vec, blago, bila kriva pri, vrhu, kada sam ga kupio.
За живот ми мало треба: клавир, хлеб и парче неба!