Billingboat Banckert

• 最近做緊BILLINGBOAT隻Banckert,行單車
  長65C闊16CM
  本身想用775既3:1
  不過有師兄隻大力神用2個都行得好夠力
  BANCKERT細一半會太大力嘛??
  有冇師兄砌過E隻可以送D參考比小弟
  

有師兄可以幫幫忙嘛

應該係over power不過咁，又問題不大遮，我估你個775應該係行12v，如果真係勁得滯咪行6V囉

550 class motor @~6V with 3;1gear box will have enough power!

or Robbe Navy Geared Motor EF76 3.3:1
     http://www.cornwallmodelboats.co.uk/acatalog/geared_motors.html

or MFA 919D Geared Motor Assembly 540 Type (2.5:1 or 6:1 gear ratio)
    http://www.cornwallmodelboats.co.uk/acatalog/geared_motors.html

High voltage will not help you as you are running a tug boat, but not a race boat.
The output torque is more important than propeller speed.   

呢隻仲有得賣???

登錄/註冊後可看大圖

首先，師兄要考慮有幾何放海？
隻船得廿六寸，放海無論多大馬力也無用，因海浪比船還大。

用大馬力電機有以下問題：
(i) 比較耗電，用同樣mAH 電池運行時間縮短。
(ii) 大馬力摩打一般平均電流比較大，要做好散熱。否則摩打好易過熱打柴，
      尤其是冇用波箱連接車䈎，由摩打直出車䈎更要注意。
      另外又要用比較大電流電變，增加成本及重量。

隻船得廿六寸，用550摩打加3:1 或6:1 波箱夠用有餘。
記住你果架係拖船，唔係快船。


Finally, 師兄加油及三思！  

so  good  

Thx！
決定用540既2:1
其實初初係心大心細諗住over power就行慢d
不過食電似終係最影響放船樂趣既

shipourking 發表於 2015-4-24 07:42
呢隻仲有得賣???

我隻係billing boat訂
日元而家咁平如果係樂天買除左平仲可以快收到
當時都接近成個月先收到
佢地公司用海運

radiant_star06 發表於 2015-4-24 09:59
呢隻好野來 wor~  當年小弟都想從這隻入手，但以 "純新手" 來說，呢隻算高難度之作！

行 775 geared 應 ...

之前砌過小号手既青島号同graupner拖船仔
所以對e隻可否完成都頗有信心
照片如果搵到容後再up

其實初初就係比佢外表吸引唔會普遍拖船咁太粗獷之餘又型仔
又唔會太長太大 對我新手黎講最適合
下隻目標係同牌既fairmount alpine

I agree to use 550 motor with gear ratio 3+1 as one of choice for Banckert. I have a Banckert using the Kyosho high Torque Motor with gear ratio 5+1 to get satisify result.I play it in Cheung Chau Tung Wan beach and the tug boat can overcome the wave easily.However ,some senior modelboat builder recomended me to use Graupner high torque motor for direct drive without gear box. The model no of the Graupner motor is Speed 600BB Turbo 12V(No 3302). Using 7.2 Voltage battery for the motor to drive the tug boat.

marktong01 發表於 2015-4-26 11:48
I agree to use 550 motor with gear ratio 3+1 as one of choice for Banckert. I have a Banckert using  ...

C-Hing,
GOOD high torque and low current motors are EXPENSIVE:

eg. Dumas 2004 6V HighTorque Motor: ~USD80.
      Dumas 2005 12V High Torque Motor: ~USD80.


Excellent high torque motors: Decaperm motors, very very hard to find and VERY VERY EXPENSIVE.


Graupner 600BB is the same as Mabuchi 545 motor with ball bearing.
Same current consumption as 550 motor.


It is always true that (motor+gear-box) is better than any high torque motor at the same cost.
我好少見拖船唔用波箱直出車䈎，大陸厰出品除外，上年同進風模型傾電話果條友仲叻到教我用電瓶嚟行
直出拖船，行得一個鐘。粗制濫造，我即刻收線，慳返八千人仔！

fy789 發表於 2015-4-26 13:12
C-Hing,
GOOD high torque and low current motors are EXPENSIVE:

Decaperm is more for 1/96 or 1/144 destroyers.

Better go for an Hectoperm if you want really expensive high torque motor for tugboat.

Direct drive for tugboat 唔係無，我呢隻 39 吋係直出既。

http://rc-evo.com/xbbs/forum.php ... ge%3D2&mobile=2

我係用三菱小巴水潑摩打，11.1v。

radiant_star06 發表於 2015-4-26 15:22
Decaperm is more for 1/96 or 1/144 destroyers.

Better go for an Hectoperm if you want really expe ...

C-Hing,

http://www.shipwrightshop.com/shop/contents/en-uk/d230_Electric-Motors.html

Both of the Decamperm and Hectoperm motors are damn expensive ! (Price differnce is <10%.)

Other than windshield wiper motors, one can also use automobile electric windows motors.

At ~30USD before counting shipping charge, this is another low-current high torque motor candidate:
http://www.cornwallmodelboats.co.uk/acatalog/cem900.html



BTW, the reason you use direct drive motors in larger boats is not because they are better
than geared motors.  

You just running out of options:
There is no GOOD and economic gear-box for  anything more powerful than 500 size motors.

動工!

keep going on

Good starting. I am waiting for your masterpiece.I wonder where will you play the Banckert  when you finish to assemmble her?