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Author Topic: dock springer  (Read 5054 times)

portside II

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dock springer
« on: May 04, 2009, 10:54:59 PM »

I have been looking for inspiration for a new springer (now that i have been bitten) so i looked around the docks at Goole for ideas .
And then i saw it , one of the dock tugs (this one has wheels) as the superstructure .
And what about an articulated fifth wheel and a trailer coupled up (one that floats of course) i have not seen this method used on water craft.
And before i get too excited is there a reason why it wont work.
daz

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arrow5

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Re: dock springer
« Reply #1 on: May 04, 2009, 11:02:50 PM »

Patent the idea !  Give it a go, nice colour scheme. Check the boot sales for a toy truck that can be modified , trailer/barge etc.  Let Eddie Stobbart know, one of his TRAINS passes here every day.  :}
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toesupwa

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Re: dock springer
« Reply #2 on: May 05, 2009, 01:41:00 AM »

Nice superstructure!...

You may need to put a bit of weight on the other side of the hull just to counteract the weight of the superstructure...

Keep us (pictures!) informed of the build!..  :-))
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Umi_Ryuzuki

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Re: dock springer
« Reply #3 on: May 05, 2009, 05:37:10 AM »

I thought you were going to build a pier on top of the hull...

 %)
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portside II

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Re: dock springer
« Reply #4 on: May 05, 2009, 10:48:48 AM »

Like i said it's only an idea with the trailer but the tug looks like it could work , like you said Umi a bit of counter weight to balance it out.
daz
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cling-on-bop

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Re: dock springer
« Reply #5 on: May 05, 2009, 07:53:02 PM »

pitch and yaw may be the reason for not using a 5th wheel.

And a reversing beeper will be mandatory  {-)
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portside II

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Re: dock springer
« Reply #6 on: May 06, 2009, 12:21:58 AM »

This may be an advantage  %) with a trailer on the back and the fifth wheel only working like the real thing on full throttle ahead the trailer would keep the bow up and stop the dreaded dive  :-)) .
Also me thinks a flashing beacon on the roof would be needed (dave) the reversing bleeper is sorted.
Construction has started .
daz
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portside II

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Re: dock springer
« Reply #7 on: May 08, 2009, 10:49:28 PM »

Ok had a look into the build and decided to have a go.
The base is a basic springer hull with a 3:1 reduction drive a mfa 540 motor and a 2 blade 40mm plastic prop (can be changed later).
the deck is a piece of alloy signage ,looks like a piece of plastic in a alloy sandwich .I have recently bought a large sheet of 5mm foam board to make some templates for a coaster so i decided to use the off cuts for the deck with plasticard for the cab ,and the fifth wheel is made from wood which is pivoted like the real thing .
I did try to glue the foam board with liquid polly but it melts  :embarrassed: so super glue was the way to go, once i am happy with the looks then some decorations will be applied and the trailer build can begin.





daz
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Tom@Crewe

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Re: dock springer
« Reply #8 on: May 09, 2009, 09:15:14 AM »

Looking good
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andyn

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Re: dock springer
« Reply #9 on: May 09, 2009, 03:44:54 PM »

That in my opinion is what a proper springer should look like, looks superb :-)
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catengineman

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Re: dock springer
« Reply #10 on: May 09, 2009, 06:07:52 PM »

So finally a "real tug"  :-)) :-))
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portside II

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Re: dock springer
« Reply #11 on: May 09, 2009, 11:33:43 PM »

the build is doing well , i just have to add the details like hand rails etc .
i have been looking at the trailer build and think either a single keel board or maybe a pair for stability at the back , also it will have to be boyant enough for a load maybe a container.
I wonder why they were never built in real life ? .
daz
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toesupwa

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Re: dock springer
« Reply #12 on: May 10, 2009, 02:02:18 AM »


I wonder why they were never built in real life ? .


Have you ever backed up an 18 wheeler?...

Should be interesting in a steering competition...  %)
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Bill D203

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Re: dock springer
« Reply #13 on: May 10, 2009, 09:09:01 AM »

Nice One  :-)) :-)) :-)) :-))
Gas Springer is coming Very soon.  Will post a pic this week.  %% %%
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portside II

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Re: dock springer
« Reply #14 on: May 25, 2009, 11:07:41 PM »

Having been busy lately i have not done much but here is what i have done .
I have started on the trailer and hopefully my calculations are correct and the tug has 2" out of the water at the stern so the trailer will have a simular level.


daz
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portside II

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Re: dock springer
« Reply #15 on: May 25, 2009, 11:30:08 PM »

and a few more of the tug and the trailer, i have just fitted the deck down with sealant and tape so i can unscrew and remove it later






daz
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portside II

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Re: dock springer
« Reply #16 on: May 28, 2009, 05:04:04 PM »

Ah its been a nice day today , so i decided to give the tug and trailer a whizz on the pond . The only thing i noticed was that the MFA 540 motor was a bit slow on 6v through the 3:1 gearbox , and this was confirmed on the water with the tug been under powered and having trouble pulling the trailer, but since then i have changed the power to 12v but have not tried it on the water since .
but here are the pic's of the first sailing.




daz
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Martin (Admin)

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Re: dock springer
« Reply #17 on: May 28, 2009, 05:16:39 PM »


How cool is that (as my kids would say)!!!!!

Brilliant job Portside


NB: I also had to ditch my reduction gearing but afterwards my prop shaft leaved like a government minister!
      Eventually I had to rip out and replace the whole prop tube.
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toesupwa

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Re: dock springer
« Reply #18 on: May 28, 2009, 05:26:34 PM »

Excellent work Daz..

Now all you need is a 'load' for the trailer...

May i suggest a 'truckable tow boat'...  :-))
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Umi_Ryuzuki

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Re: dock springer
« Reply #19 on: May 28, 2009, 06:05:51 PM »

That finished up great!  8)

A small working tow boat on the trailier would be hilarious.  :-))
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Bill D203

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Re: dock springer
« Reply #20 on: May 28, 2009, 06:29:24 PM »

NICE ONE :-)) :-)) :-)) :-))
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SteamboatPhil

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Re: dock springer
« Reply #21 on: May 28, 2009, 08:43:27 PM »

Oh I do like that, nice one  :-))
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Tug---Kenny

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Re: dock springer
« Reply #22 on: June 02, 2009, 08:50:59 PM »


Brilliant, and so original.   :-))

ken
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craftysod

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Re: dock springer
« Reply #23 on: June 02, 2009, 09:44:34 PM »

Nice one,
The reason its slow,is because the bogey lines have not been conected to the trailor,and the air brakes are still on  {-)
Mark
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bosun

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Re: dock springer
« Reply #24 on: June 02, 2009, 11:09:29 PM »

Hy Mark
Thats looking tidy mate, Proper Job, Umi's suggestion for a load would look great.
Bosun
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