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Author Topic: My Build of MT Hibernia  (Read 46664 times)

Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #75 on: September 29, 2010, 07:58:12 PM »

The next job was to fit the brand new 900 motor from MMB.

This was clamped to its holder and rubber washers were inserted into the base. A temporary metal tube was fitted to the prop and joined to the motor to line it up squarely when being fitted.

This was then removed and a flexible coupling was inserted and the motor was secured to the base.  We then connected up to a 6 volt battery  (so that it didn't run too fast under test) and checked for noises and wobbles but everything sounded all right.

As a P.S  it runs fastest ant-clockwise, so what handed propeller do I need for forward motion please.
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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #76 on: September 29, 2010, 08:02:50 PM »


Before we finally secure down the deck we fitted the largest component next. The battery box was cut and glued in place.


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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #77 on: September 29, 2010, 08:07:04 PM »


Finally, for this week, we started fitting the sides to the openings in the deck for the cabins to fit above.

These have only been glued into position and will be trimmed down to fit the cabins and look tidier.

I haven't plated the hull yet as I don't want to damage the surface with all these works going on.   ;)




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bosun

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Re: My Build of MT Hibernia
« Reply #78 on: September 29, 2010, 08:52:37 PM »

 You,ll need a Left Hander Ken
Bosun
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DickyD

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Re: My Build of MT Hibernia
« Reply #79 on: September 29, 2010, 09:00:39 PM »

Thats come on well Ken  :-))
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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #80 on: September 29, 2010, 09:03:57 PM »

You,ll need a Left Hander Ken
Bosun

Thanks Terry.  I'm not very nautical.   :-))   

Ken



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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #81 on: September 29, 2010, 09:07:12 PM »

Thats come on well Ken  :-))

Thank you Dicky.  It's been lonely but I flogged onwards and upwards.   ;)

Had to do something to stop the 'Mrs' using it as a plant potter.

Ken

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derekwarner

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Re: My Build of MT Hibernia
« Reply #82 on: September 29, 2010, 09:23:49 PM »

Ken mentions...... "it runs fastest ant-clockwise, so what handed propeller do I need for forward motion please"

mmmm...down  south of the border  {-) we would look on the output shaft of the motor or  %%....yes even on the prop shaft from the same perspective

So if the rotation appears to be anticlockwise  O0 ...you need an anticlockwise handed prop to go FWD, but you would still need an anticlockwise handed prop to go ASTERN :-))

In OZ we call these left handed [I think] ........... :D Derek
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Derek Warner

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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #83 on: September 29, 2010, 09:35:53 PM »

Thanks Derek.

Is this the one ?  I shall go Brass and up a blade to four, to get the power on the pull.   8)

ken


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tt1

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Re: My Build of MT Hibernia
« Reply #84 on: September 30, 2010, 02:13:13 AM »

Hello Ken, please excuse me for jumping in, but as a newcomer I would like to gain a little more knowledge re motor and prop rotation and hope by chipping in on your thread now, rather than start a new topic, someone may offer advice / knowledge that would be of mutual benefit. (I hope you don't mind - would hate to offend) 
        I asked a similar question to that of yours a short while ago and was told that most motors, if not all, run more efficiently one way ( anti-clockwise ) and only about 80% efficiently the other ( clockwise ).  The obvious question followed and (depending on how you view the motor) what was classed as clockwise / anti-clockwise and was informed that in Britain, the prop rotation is viewed looking AT the stern of the boat hence when facing the spindle at the front of the motor it turns anti-clockwise the most efficient direction, and therefore a left handed prop (as you have pictured in your post) would be the correct one to use for forward propulsion,  and a right handed one would be needed if the motor was reversed. Apparently the opposite is the case in other parts of Europe (so I was informed) whereby rotation is viewed looking FROM the stern. I found this out at a recent show where I nearly bought the wrong prop as they were made abroad and identified as l/hand but were actually r/hand.
        Anyway, "what do I know" as Martin would say but I hope it prompts some definitive info.

      have enjoyed following your builds Ken, keep up the good work  :-))

                                regards, Tony.
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derekwarner

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Re: My Build of MT Hibernia
« Reply #85 on: September 30, 2010, 07:04:45 AM »

Hullo Ken & Tony.....yes by convention we view [looking on the output shaft] of electric motors, air motors or hydraulic motors

If the shaft rotates anti-clockwise we term this a left hand ....& naturally if the shaft rotates clockwise we term this as right handed

I would suggest that not all electric motors are wound for optimal anticlockwise rotation.........many special motors...eg a windscreen wiper motor and the automotive dash heater fan motor are designed [windings wound] so that a specific direction is attained

Certainly the latter automotive dash heater fan motor employ a single ball to act as a thrust ball element to cushion the enduced EMF

Naturally Ken.....the prop you have shown is designed to rotate anti-clockwise ..............for FWD motion...... :-)) Derek
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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #86 on: September 30, 2010, 07:23:04 PM »


Very informative Derek. Thank you for that. I shall be ordering the prop with the blades bent as shown.

With regard to best rotation Tony,   ( chip in any time  :-)) )  I've found that by connecting a battery at half the recommended voltage, it is possible to tell which way around with the plus and minus gives the fastest speed. 
As an extra tip, I did find that the positive terminal was colour coded red (motor from MMB) and this produced the faster speed anyway. 8)

Today I only had time to glue the fore deck down and clamp it before I was whisked away on grandchild looking after duties. A nice break with clean clothes on today. (at least when I went in)   :}

Ken



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tt1

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Re: My Build of MT Hibernia
« Reply #87 on: October 01, 2010, 01:16:17 AM »

Thanks for the tip Ken. :-))
         Being a proud grandpa also, I'm always happy to feed our youngest when I can, after experience of 3 previous I'd of thought by now I could tell the difference between a lovely warm smile ----------   and wind - always end up changing my shirt!  {:-{  {-)
                                  Keep the pics coming, kind regards, Tony.
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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #88 on: October 02, 2010, 07:21:33 PM »

Finally got the deck secured down today.       O0

Doesn't it look unusual without the  bulwarks ?  Now I have a good surface to attach them to.

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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #89 on: October 02, 2010, 07:23:59 PM »


Next job was to line up the cabin base with the deck curvature. This involve a bit of work to ensure it rested along the new deck which was curved in two directions.   %)


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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #90 on: October 02, 2010, 07:29:19 PM »

Next we built the ladder assembly to the upper platform where the water hoses will be situated.

This started out as a piece of 2X1 timber.  We routed out a groove of 25mm wide and made 14 steps from plastic and glued them in, using a jig to get them all square.

The back section was sanded round to form the complete shape and placed on for the picture. We have still to cut the opening in the platform to line it up correctly.  The Fire hoses are on order at great expense !!

The funnel is the master jig and is there for decoration only.   :}

 
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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #91 on: October 04, 2010, 08:01:55 PM »


I then got on with the funnel construction.  I decided not to do it in 0.7mm plywood as I need the sheet for planking later, so I reverted to plastic sheet.

This was wrapped around the block and glued together then dumped into a bath of hot water. Unfortunately the wood swelled as well and I couldn't remove the plastic from the mould. I had to resort to cutting it off, which made a mess and was scrapped.  Hey Ho.!!

I started again with a new sheet but this time.  I made biscuit shapes of the funnel and glued this inside the curved plastic and wrapped the whole lot in loads of rubber bands.


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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #92 on: October 04, 2010, 08:04:21 PM »


When it was dry I set about fitting the Bands around the funnel. After a bit of light sanding the funnel was sprayed with red oxide.

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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #93 on: October 04, 2010, 08:06:43 PM »


You may have noticed the new coat of Brown on the upper cabin. Lovely paint this. I shall be doing the other cabins this colour.  I have left the top section as real wood as it sets it off nicely. 



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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #94 on: October 04, 2010, 08:08:25 PM »


As I was getting fed up with propping up the hull with bricks, I decided to get on with the stand.  Here it is all glued up and drying for the night.

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Peter Fitness

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Re: My Build of MT Hibernia
« Reply #95 on: October 05, 2010, 05:53:07 AM »

It's looking good, Ken, I'm glad you didn't throw in the towel...not that I thought you would :-)

Peter.
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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #96 on: October 05, 2010, 10:49:13 AM »


Thank you Peter.  (You and me both  O0 )  I don't mind admitting it's a challenge.

Looking forward to getting the bulwarks on and turn her into a proper ship. The stand is all dry and fits, so I have a good base on which to work now.

Cheers

Ken

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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #97 on: October 12, 2010, 07:41:05 PM »


Well that's the Coal house built and out of the way, so it's back to boating.

Today we made the bulwarks and shaped them to the deck. Nails were then placed the thickness of the 3 ply inside the outer edge and the wood glued and clamped into position up against the nails. Tape was then applied to force it tight down onto the deck and also to apply an angle inwards for the bulwarks.

What a strange way of doing things !! I don't recommend it.

The stern piece was cut in a curve to sloped inwards and around the stern section where it promptly snapped in half. Another piece was measured and cut to shape and dunked into a bowl of water to soften it. There it will stay until tomorrow with a weight on it to keep it submerged.  %)

Here's what it look like at the moment.



 
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tugmad

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Re: My Build of MT Hibernia
« Reply #98 on: October 12, 2010, 08:31:21 PM »

It is coming along well Ken :-))  Geo
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Tug-Kenny

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Re: My Build of MT Hibernia
« Reply #99 on: October 12, 2010, 08:36:24 PM »


Thanks George. I am really pleased with her now. The Stanchions have arrived along with some sundries and expensive fire hydrants.     :}

Ken

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