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Author Topic: Open type ferry  (Read 46698 times)

cos918

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Re: Open type ferry
« Reply #125 on: November 25, 2015, 10:12:35 PM »

Hi Yannis
looked at your vid .about 40 sec to open the door. Bit slow you want to be a round 15 sec max . Trying to hold a ferry steady for 15 sec while the doors lowers is hard .


John
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derekwarner_decoy

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Re: Open type ferry
« Reply #126 on: November 26, 2015, 01:33:12 AM »

Well done Yannis............... :-))

I like the sound of the hydraulic pump screaming over the top of the counterbalance valve which allows the ramp to be pushed down [lowered] and [pulled] raised ......I suggest the slowness of the ramp movement adds realism.......

Derek
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Derek Warner

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derekwarner_decoy

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Re: Open type ferry
« Reply #127 on: November 26, 2015, 02:28:36 AM »

Sorry.... :embarrassed:...I didn't explain myself properly  <*<

All wire sheaved hydraulically powered vessel ramps are driven down......not any free fall of wire....the force [hydraulic pressure] is set by the counterbalance valve and is a greater setting than required for hoisting or raising up....the reason for this is if hydraulic power is lost, the ramp will lock up and not free fall out of control to the wharf

This is why the audible sound of the ramp being lowered is always greater than the sound of the ramp being raised

Derek
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Brian60

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Re: Open type ferry
« Reply #128 on: November 26, 2015, 08:33:19 AM »

Looks good, but I agree with the others, it needs to be a bit faster in operation.

bassplayer1

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Re: Open type ferry
« Reply #129 on: November 26, 2015, 09:20:07 PM »

Thank you all very much for the feedback, much appreciated :-)  I went today down to the port just to watch them real things departing for the mainland and see how long it takes to raise the rump! Well, it takes sometime but maybe a tad faster than mine, not a lot! So, to start with I think I'll go for a bigger thread and see from there!!!
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derekwarner_decoy

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Re: Open type ferry
« Reply #130 on: November 26, 2015, 09:37:37 PM »

Yannis.......if you must change the speed >>:-(, ...is the servo drive rotation motor running on 4.8V ?......if so you could consider increasing to 6V   %)

For interest, what was the real vessel ramp lowering speed/time?....& confirm your scale of build.....from there a simple calculation will confirm a distorted visual image where true scaled speed can appear too fast ........ Derek
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bassplayer1

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Re: Open type ferry
« Reply #131 on: November 28, 2015, 06:17:08 PM »

Yannis.......if you must change the speed >>:-( , ...is the servo drive rotation motor running on 4.8V ?......if so you could consider increasing to 6V   %)

For interest, what was the real vessel ramp lowering speed/time?....& confirm your scale of build.....from there a simple calculation will confirm a distorted visual image where true scaled speed can appear too fast ........ Derek


Derek, increasing the voltage is out of question because I allready run it on 7.2V {:-{  I came up with another solution wich works fine, see below!
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bassplayer1

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Re: Open type ferry
« Reply #132 on: November 28, 2015, 06:27:19 PM »

I've been adviced by a fellow modeller from a Greek forum and made some mods to the system wich work fine to my opinion! Also changed the ramp with the prototype I made for casting as the epoxy one was too heavy! The speed is more scale now and I'm quite happy with it :-)  Please, tell me what you think, here is some photos and a video


 


https://youtu.be/D7QUTrHgSoA
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derekwarner_decoy

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Re: Open type ferry
« Reply #133 on: November 28, 2015, 07:36:56 PM »

Yannis....yes a slight difference in speed....still appears fine in operation :-))..... I would have thought that the heavier ramp would have provided a more realistic visual.............Derek
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JimG

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Re: Open type ferry
« Reply #134 on: November 28, 2015, 07:51:54 PM »

One problem you might have in use is that the lines will wear through the plastic servo arm you are using. You should try to fit some form of a pully for the lines to run around to stop this.

Jim
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cos918

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Re: Open type ferry
« Reply #135 on: November 28, 2015, 10:17:39 PM »

Hi Yannis
That better. Does your ramp have two settings fully up and fully down or can you stop it 1/2 way ?


John
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bassplayer1

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Re: Open type ferry
« Reply #136 on: November 29, 2015, 12:34:49 AM »

Yannis....yes a slight difference in speed....still appears fine in operation :-)) ..... I would have thought that the heavier ramp would have provided a more realistic visual.............Derek


Yes, it would Derek but it was way too heavy I think, it was almost stalling the mechanism. Thanks for the kind words :-))
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bassplayer1

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Re: Open type ferry
« Reply #137 on: November 29, 2015, 12:39:09 AM »

One problem you might have in use is that the lines will wear through the plastic servo arm you are using. You should try to fit some form of a pully for the lines to run around to stop this.

Jim


Yes, you are right Jim, I'm going to fit a pulley :-))  I'm having it this way only for now, just for testing!
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bassplayer1

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Re: Open type ferry
« Reply #138 on: November 29, 2015, 12:42:45 AM »

Hi Yannis
That better. Does your ramp have two settings fully up and fully down or can you stop it 1/2 way ?


John


Hi John
Thanks a lot! I have two settings, fully up and fully down!


   Yannis
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bassplayer1

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Re: Open type ferry
« Reply #139 on: December 02, 2015, 10:18:23 PM »

Final modifications, works really fine and smooth now :-)


   
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Norseman

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Re: Open type ferry
« Reply #140 on: December 03, 2015, 08:28:41 PM »

Hi Yannis


This is a lovely build. I liked that you detailed the passenger lounge. Impressive all round.


Dave
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ballastanksian

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Re: Open type ferry
« Reply #141 on: December 03, 2015, 08:39:36 PM »

That's more like it! I like the mechanism.
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cos918

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Re: Open type ferry
« Reply #142 on: December 03, 2015, 10:05:26 PM »


Hi John
Thanks a lot! I have two settings, fully up and fully down!


   Yannis
Hi Yannis
I have this to on Celestine. I am thinking of changing it so I can lower say 75% of the way down then stop. then do the final 25% Later. What I have found it can be hard to keep a ferry lined up for the time it takes to lower a ramp. So mine takes about 12 s so As I am going in asten I can lower 75% when I am lined up with the dock lower then final 25% which would mean I only have to keep her lined up for about 3 s .Just some thing for you to think about


john
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bassplayer1

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Re: Open type ferry
« Reply #143 on: December 03, 2015, 10:43:25 PM »

Hi Yannis


This is a lovely build. I liked that you detailed the passenger lounge. Impressive all round.


Dave


Thank you Dave, much appreciated!
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bassplayer1

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Re: Open type ferry
« Reply #144 on: December 03, 2015, 10:44:35 PM »

That's more like it! I like the mechanism.


Very nice of you, thank you very much!
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bassplayer1

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Re: Open type ferry
« Reply #145 on: December 03, 2015, 10:48:30 PM »

Hi Yannis
I have this to on Celestine. I am thinking of changing it so I can lower say 75% of the way down then stop. then do the final 25% Later. What I have found it can be hard to keep a ferry lined up for the time it takes to lower a ramp. So mine takes about 12 s so As I am going in asten I can lower 75% when I am lined up with the dock lower then final 25% which would mean I only have to keep her lined up for about 3 s .Just some thing for you to think about


john


That's a good idea John but how do I go about it? Do I put an extra end switch? Do you have any diagrams! I'm no good with electrics!
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bassplayer1

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Re: Open type ferry
« Reply #146 on: December 27, 2015, 05:37:19 PM »

Merry Christmas and a happy New Year everyone :-)
Planing on the vehicles I'm going to put on her! The bike is not finished yet. Here is some photos


         
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derekwarner_decoy

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Re: Open type ferry
« Reply #147 on: December 27, 2015, 09:49:52 PM »

Yannis.......stick with making model boats...as you make a very terrible lob sided clock maker  {-) .......

Naturally the shadows [Hank Marvin style] make the spoking look twice as complicated as it is  :o

Is that threaded joint just below the 3 position pin the tensioning for the complete work?

merry Christmas.... Derek
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bassplayer1

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Re: Open type ferry
« Reply #148 on: January 01, 2016, 10:00:32 PM »

No Derek, it's just joining two lengths of wire together! Thanks for the comment and really, being a clock maker never crossed my mind {-)
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bassplayer1

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Re: Open type ferry
« Reply #149 on: January 01, 2016, 10:07:20 PM »

Happy New Year everyone! Just started adding some color to it and is the first and the last time I ever paint a model with spray cans >>:-( I just can't get the hang of them!


       
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