Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: motors and bow thrusters  (Read 4351 times)

bigford

  • Guest
motors and bow thrusters
« on: August 15, 2007, 10:59:20 pm »

seeing is how you boys and girls on the other side of the BIG pond
do thing differently then we do in the states I'll ask this here too.

3 of my boats will be twin screw and bow thruster set ups
 now i was at the hobby shop getting my powerset and bowthruster
today and the hobby shop owner was telling me
( you do not need two esc for the twin screw  with a bow thruster)
 
he said wire the motors to one esc and the b.t. to a  on- off- on
switch.  his reason is that 2 esc  set up is to much to control
and unless your docking  300 foot boats its a waste of money

all this started when i asked about the robbe f-14 navy controller
Logged

Mankster

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 768
  • Wheelerdealer
  • Location: London, UK
    • RC Model Submarines
Re: motors and bow thrusters
« Reply #1 on: August 15, 2007, 11:24:53 pm »

Yep, thats one way of doing it. Saves on ESC's. Independent throttle control is a big bonus though. If you can afford another ESC for the second main motor, getting a motor mixer (mixed both throttles with the rudder) like the Action or JJC one is preferable to a twin stick Tx for ease of use. If you have a suitable programble computer TX you may be able to do the mixing from Tx itself. I find twin stick in the transmitter fro throttles a real pain to use effectively.

johno 52-11

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 301
  • Model lifeboats built to perform
  • Location: Dudley "The Blackcountry" West Midlands
    • lifeboat Models
Re: motors and bow thrusters
« Reply #2 on: August 19, 2007, 08:04:34 pm »

Bgford

Having used the F14 with twin sticks I find it much te best way of controling a big model my mate has has one for his Severn class lifeboat this has two motors and a bow thruster which is controled on one of the slides on the F14 the bow theuster also has a speed controler. with this setup the control is far better then having a mixer.

videos on our website.
Logged

catengineman

  • Guest
Re: motors and bow thrusters
« Reply #3 on: August 23, 2007, 11:31:58 pm »

Three ESC's = independent main motor control and variable B/T control
Oh and ASD's for the main propulsion now that is a combination to die for and yes there isn't much you cant make the vessel do.
"walk side ways" with the main drives opposed or use one main and the BT and in heavy weather both main and the BT (one main to correct any ahead/astern drift
then there is the added control if it is a tug and you tow

Just my opinion but build to suit your taste and budget

Richard
Logged

bigford

  • Guest
Re: motors and bow thrusters
« Reply #4 on: August 24, 2007, 12:10:53 am »

this is going to be the set up for a happy hunter and a smit rotterdam
Oh and ASD's for the main propulsion ???? what is asd?
Logged

Stavros

  • Guest
Re: motors and bow thrusters
« Reply #5 on: August 24, 2007, 06:46:55 pm »

Pm Bigford
Logged

catengineman

  • Guest
Re: motors and bow thrusters
« Reply #6 on: August 24, 2007, 08:28:02 pm »

Oh and ASD's for the main propulsion ???? what is asd?

Azimuth Steering Drive

Is what I know them by though some call them shottels amongst other names ::)
Richard,
Logged

-Martin-

  • Shipmate
  • *
  • Offline Offline
  • Posts: 15
  • Proud to be a part of the Model Boat Mayhem Forum.
Re: motors and bow thrusters
« Reply #7 on: August 30, 2007, 10:08:02 am »

Oh and ASD's for the main propulsion ???? what is asd?

Azimuth Steering Drive

Is what I know them by though some call them shottels amongst other names ::)
Richard,

ASD stands for Azimuth Stern Drive, referring to the type and location of the propulsion system.

Normally these types of tugs and propulsion system are referred to either as reverse tractor tugs or ASD tugs. The difference between the two is normally understood by the reverse tractor tug only being able to operate over the bow, with no real/suitable towing point aft. Whereas the ASD tug is normally understood as being able to operate over the bow as well as over the stern. 

Also names as Schottel, z-drive, rudderpropeller, compass thruster and azimuth thruster only refer to the type of propulsion and not the type of tug they are installed in. These may be installed in both Tractor tugs and ASD/reverse tractor tugs.
 
Brgds

Martin
Logged

Ghost in the shell

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,704
Re: motors and bow thrusters
« Reply #8 on: September 04, 2007, 04:21:49 pm »

ASD's have also made apperances in similar forms on ferries and cruise ships, such as the azipod's on the queen mary, basically it is a 360 degree swivelling drive, that propels and steers a boat. 

to the basic extremes i'd put the outboard motor in the ASD catagory
Logged
Go Nuclear!  you'll love it

norry

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 834
  • ...Get Your Tugs Out For The Bouys...
  • Location: Paisley Scotland
Re: motors and bow thrusters
« Reply #9 on: September 04, 2007, 05:02:43 pm »

    ...Hi Guys...


In my opinion you should kit the engine room out the same as the real tug...

I,ve been on a few tugs & i,ve never seen one with both main engines controlled by one throttle, unless its a joystick control...

My  model  of "DUTCH PRIDE" which is called "SCOTCH PRIDE"  has independant speed controllers for each engine, Bow Thruster & towing winch... 4 in all...Thats the way the real tug is kitted out...

I find independant control of each engine is best, especially in windy conditions....

...All The Best...Norry...
Logged
...Get Your Tugs Out For The Buoys...

funtimefrankie

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,259
  • Location: Birkdale, Lancashire. twixt the Mersey & the Ribble
Re: motors and bow thrusters
« Reply #10 on: September 04, 2007, 07:29:43 pm »

With two ASDs do you have independant steering on each or do they move tgether?
Logged

bigford

  • Guest
Re: motors and bow thrusters
« Reply #11 on: September 05, 2007, 02:19:29 am »

i think i'm going to go with a mtroniks viper 20 for the main motors and a
viper 15  for the bowthruster
Logged

catengineman

  • Guest
Re: motors and bow thrusters
« Reply #12 on: September 27, 2007, 12:45:46 pm »

With two ASDs do you have independent steering on each or do they move together?

That is up to you and I have set my tug up so that they are independent, which means that if you don't fit a B/T then you are still able to 'walk' the vessel with great ease. and if you like you can see a different reaction as to how the vessel steers depending on which side you use or 'both' but take note ASD's used to turn a vessel together can be very quick on the turn. I myself use the outer screw to the turn which I find gives a smoother operation.
My opinion only.
R,
Logged

funtimefrankie

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,259
  • Location: Birkdale, Lancashire. twixt the Mersey & the Ribble
Re: motors and bow thrusters
« Reply #13 on: September 27, 2007, 08:39:13 pm »

I've bought a mixer, but I'm not sure if it will be effective or not, any thoughts?

The boats not been in the water yet but it might have a try next week, so I'll try with and without.
Logged
Pages: [1]   Go Up
 

Page created in 0.099 seconds with 21 queries.