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Author Topic: MMM Portgarth build  (Read 22575 times)

mersey dave

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Re: MMM Portgarth build
« Reply #25 on: March 19, 2017, 12:03:37 PM »

Looking good  :-)) them motors look good ..... what type are they.

Regards Dave.

T33cno

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Re: MMM Portgarth build
« Reply #26 on: March 19, 2017, 12:07:40 PM »

Made by Valeo I believe to drive a chair lift through a gearbox.
The pair in my Athon only draw 10.5 amps on full load




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mersey dave

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Re: MMM Portgarth build
« Reply #27 on: March 19, 2017, 12:13:26 PM »

Thanks mate  :-)) I do like the look of them.......will have to have a look on the web.

Regards Dave.

T33cno

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Re: MMM Portgarth build
« Reply #28 on: March 19, 2017, 01:44:46 PM »

Having satisfied myself that I've got the shallowest shaft angle possible, I've set the shaft supports in place with P38
The shaft ends are set as close to the Korts as possible with the Eze extensions removed.
I now have hands free for further fine adjustment. There is still play in the P bracket holes and not glued to the tubes at this point.

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T33cno

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Re: MMM Portgarth build
« Reply #29 on: March 19, 2017, 01:52:47 PM »

Thanks mate  :-)) I do like the look of them.......will have to have a look on the web.

Regards Dave.


These are the closest regular boat motor but small in comparison and mine have huge bearings and 8mm shaft
http://www.cornwallmodelboats.co.uk/acatalog/cem900.html
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T33cno

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Re: MMM Portgarth build
« Reply #30 on: March 19, 2017, 02:10:50 PM »

At this early stage I'm already thinking this must have a huge displacement so I would think it ought to handle 2x12 volt 9ah ?
This should enable well over two hours play
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mersey dave

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Re: MMM Portgarth build
« Reply #31 on: March 19, 2017, 03:02:20 PM »


These are the closest regular boat motor but small in comparison and mine have huge bearings and 8mm shaft
http://www.cornwallmodelboats.co.uk/acatalog/cem900.html

The 900 motors are what I have in my maltby driving 65mm props runs very well with loads of power.

Regards Dave.

T33cno

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Re: MMM Portgarth build
« Reply #32 on: March 19, 2017, 03:09:27 PM »

Glad I made the stand which works equally well upside down. Many jobs would be so difficult without it.
Bowthruster marked, I've chosen a spot that allows the maximum length of tube
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T33cno

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Re: MMM Portgarth build
« Reply #33 on: March 20, 2017, 08:29:05 PM »

 :-))
My first ever cut & thrust. Now please tell me what is the best fixing method? should I go with the P38 or Resin?





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Tug-Kenny

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Re: MMM Portgarth build
« Reply #34 on: March 20, 2017, 08:37:42 PM »

I would apply P38 to the outside to hold it in position and then resin the inside for strength.  When dry, you can smooth down the outside flush with the hull, knowing that it is held firmly  (and permanently) by the resin.

Hope this helps

ken
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T33cno

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Re: MMM Portgarth build
« Reply #35 on: March 20, 2017, 08:39:02 PM »

I would apply P38 to the outside to hold it in position and then resin the inside for strength.  When dry, you can smooth down the outside flush with the hull, knowing that it is held firmly  (and permanently) by the resin.

Hope this helps

ken


Yes that makes very good sense! thank you Ken
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Tug-Kenny

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Re: MMM Portgarth build
« Reply #36 on: March 20, 2017, 08:40:56 PM »


I'm often faced with the same type of problem.  P38 does tend to be brittle when out loose in the air and not supported very well.

glad to help

ken
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T33cno

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Re: MMM Portgarth build
« Reply #37 on: March 20, 2017, 08:43:09 PM »

I'm often faced with the same type of problem.  P38 does tend to be brittle when out loose in the air and not supported very well.

glad to help

ken
Very much appreciated  :-))
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tugnut

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Re: MMM Portgarth build
« Reply #38 on: March 20, 2017, 08:59:49 PM »

That's looking very neat  :-))
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T33cno

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Re: MMM Portgarth build
« Reply #39 on: March 20, 2017, 09:02:05 PM »

That's looking very neat  :-))
Thanks yes I'm quite chuffed  :-)
I drilled a couple of 25mm holes close together each side with a thin wall hole saw and then purely half round file. Took about half hour
Thruster is 28mm OD
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T33cno

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Re: MMM Portgarth build
« Reply #40 on: March 20, 2017, 09:45:25 PM »


Notes of the day
1 :- Steve @ modelboatbits is altering two powerflex couplings for me to give 8mm to 8mm plain. Not a stock item.
2 :- I've emailed MMM about the Kort tube supports and asked for a replacement for the rubbish one.
No reply yet
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Stavros

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Re: MMM Portgarth build
« Reply #41 on: March 21, 2017, 03:05:11 AM »

P38 has no strength in it st all...use P40 to fix the shafts in place or even epoxy glue




Dave
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T33cno

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Re: MMM Portgarth build
« Reply #42 on: March 21, 2017, 06:58:31 AM »

Cheers Dave :-))
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T33cno

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Re: MMM Portgarth build
« Reply #43 on: March 21, 2017, 12:45:05 PM »

It has occurred to me that as I've made such a good job of my thruster holes that this would be a good time to transfer them into a template for future builds or sharing
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T33cno

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Re: MMM Portgarth build
« Reply #44 on: March 22, 2017, 06:33:50 PM »

Today at work I explored the possibilities for something to align the Kort tunnels and I came across some stock copper pipe end caps that fit like a glove  :-)) .
Props are on order with Simon at Protean and should be with me soon UNLIKE the SIX WEEK nonsense of prop shop  >>:-( 
A replacement Kort support is on its way from MMM but did not arrive today.


EDIT
These end caps are a no.67 that I believe relates to the O.D. of the pipe 67mm so the outside diameter is bang on 70mm

Friday is SMELLY day. I don't work Friday so anything that gets up the wifes nose must be done then!
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T33cno

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Re: MMM Portgarth build
« Reply #45 on: March 22, 2017, 08:48:14 PM »



This is my demountable platform for all the Action electronics. Paxolin glues very quickly with the product pictured. I've also made the stern tube support bulkhead of the same.


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T33cno

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Re: MMM Portgarth build
« Reply #46 on: March 22, 2017, 08:52:19 PM »

Looking good but unfortunately this Kort is full of pin holes and requires time and expense that should not really  be needed.
The colour is Halfords filler primer and its going to need a good bit more



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T33cno

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Re: MMM Portgarth build
« Reply #47 on: March 22, 2017, 10:50:02 PM »

I'm absolutely impressed with this Zap A Gap glue




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T33cno

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Re: MMM Portgarth build
« Reply #48 on: March 24, 2017, 11:58:47 AM »


So props and bow thruster glassed in (thanks to those who gave advice) :-))

Ready for filler

All abraded

secured externally and ready for triming later

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T33cno

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Re: MMM Portgarth build
« Reply #49 on: March 24, 2017, 12:02:35 PM »

Sikaflex 221 PU adhesive filler has just arrived so I'm going to set my motors & mounts in place next.


Props arrived yesterday from Protean  :-))
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