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Author Topic: Model Slipway Sentinel  (Read 42129 times)

Daniel from Elsass

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Re: Model Slipway Sentinel
« Reply #100 on: August 24, 2009, 04:10:03 PM »

Hello
How is weight your Sentinel empty ? and in order (witch motor, battery and so..)
Thank
Daniel
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DickyD

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Re: Model Slipway Sentinel
« Reply #101 on: August 24, 2009, 04:27:13 PM »

Hi Daniel

I used 2 direct drive MFA 550 motors.

http://www.cornwallmodelboats.co.uk/acatalog/standard_motors.html

The electrical system is the same as the diagram on ACTion Electronics web site'

http://www.action-electronics.co.uk/pdfs/Slipway%20Sentinel.pdf

And she floats with the water line just submerged.

Hope this helps
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Daniel from Elsass

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Re: Model Slipway Sentinel
« Reply #102 on: August 24, 2009, 04:46:51 PM »

Thank for your help
Daniel
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DickyD

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Re: Model Slipway Sentinel
« Reply #103 on: August 24, 2009, 05:16:11 PM »

Sorry I forgot the battery.

One 7.2V 4600mAh racing pack

http://www.component-shop.co.uk/html/batteries.html
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dougal99

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Re: Model Slipway Sentinel
« Reply #104 on: August 24, 2009, 06:58:04 PM »

Dicky

How much water are you getting in and are you sure it's coming in via the rear hatch?  I put some vaseline on the inner shelf just to be sure.

Doug
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DickyD

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Re: Model Slipway Sentinel
« Reply #105 on: August 24, 2009, 08:21:18 PM »

Pretty sure its getting in through the rear hatch as the back of the boat gets really wet.
I have alredy put vaseline round the hatch for next time.
I have also put a bulkhead in front of the rudders as the outer tube is not very high.
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Peter Fitness

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Re: Model Slipway Sentinel
« Reply #106 on: August 25, 2009, 09:06:01 AM »

Very difficult, Richard, I think I mentioned the problem in an earlier post in this thread. Vaseline helps, but I found that easing off the throttle slowly helps prevent the stern wash coming over the rear deck.

Peter.
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Daniel from Elsass

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Re: Model Slipway Sentinel
« Reply #107 on: August 25, 2009, 05:28:17 PM »

Richard,
thank for the adress for batteries, their prices are very interessing
daniel
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DickyD

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Re: Model Slipway Sentinel
« Reply #108 on: August 25, 2009, 05:57:49 PM »

I use them all the time Daniel, they are cheap and the deliveries are quick. :-))
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Edward Pinniger

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Re: Model Slipway Sentinel
« Reply #109 on: August 26, 2009, 12:47:12 PM »

Excellent work!  :-)) Looks great on the water, too.

The Vosper Sentinel design was actually used as the basis for the US Coast Guard's 110-foot Island-class cutter (which I'm currently modelling). You can definitely see the resemblance between the two designs, though there seem to be some differences in the hull form as well as the superstructure layout.
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John W E

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Re: Model Slipway Sentinel
« Reply #110 on: August 29, 2009, 09:48:51 PM »

hello there

just a quick note for Richard (Dicky) :-)

One of the possible reasons that there was a bit of water in the bottom of the boat, I had heard from various sources that this particular model was slightly 'unstable' and there was a fair wind blowing on that Sunday - so when I launched the model - prior to letting it go I did what I call a roll test - where I roll the boat on its side so that the water is half way up the superstructer and then let it go.  If this model rights itself - we know we have a fair chance of knowing it will right itself if it is blown over a fair degree out in the middle of the lake.

So.......when I rolled it over on its side, Dicky has built half inch high combings on the inside of the superstructure, and, the water would have been well above these when I rolled her  :-))

It is a lovely well built/performing model, a credit to Dicky's skills.

It was brilliant fun meeting Dicky and his better half - although I do believe she has more modelling knowledge than Dicky - because she was the one who sorted out the frequency board for me...and sorted out the crystals and the batteries.......we really enjoyed meeting Dicky and his wife....sad that we couldnt meet up again, just one of those things.   


aye
john
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Martin [Admin]

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Re: Model Slipway Sentinel
« Reply #111 on: August 30, 2009, 05:48:59 AM »

(Wlcome back John!)
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justboatonic

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Re: Model Slipway Sentinel
« Reply #112 on: August 30, 2009, 09:05:30 PM »

Sorry I forgot the battery.

One 7.2V 4600mAh racing pack

http://www.component-shop.co.uk/html/batteries.html

Hi DD.

That's an impressive turn of speed on the 7.2v pack!

Do you have the gearbox fitted to the motors or is it just the motor fixed to the shaft? MSW seem to recommend the gearbox on the mFA motors saying it allows the props to turn easier. However, I suspect the gearbox takes a lot off the top end speed wise.
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DickyD

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Re: Model Slipway Sentinel
« Reply #113 on: August 31, 2009, 09:21:40 AM »

I went direct drive with 2/ 550 MFA motors.

Works great even at slow speeds with the ACTion gubbins installed.
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DickyD

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Re: Model Slipway Sentinel
« Reply #114 on: August 31, 2009, 01:33:00 PM »

Couldn't find anywhere where MSW suggest using a gear box, their recommended motors are two 540 motors direct drive.

SENTINEL Cutter  MS-12     2 of Pack 3

Pack 3     540/1 motor (4.5-15v) = 7 + coupling = 6.50     13.50
   
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Edward Pinniger

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Re: Model Slipway Sentinel
« Reply #115 on: September 01, 2009, 02:57:04 PM »

Sorry I forgot the battery.

One 7.2V 4600mAh racing pack

http://www.component-shop.co.uk/html/batteries.html

What sort of run time do you get with a 7.2V battery pack? I always had the impression they had much less endurance than lead/acid cells, at least when used with larger models.
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DickyD

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Re: Model Slipway Sentinel
« Reply #116 on: September 01, 2009, 05:24:34 PM »

Not that sure, I ran her for about 30mins and she was still going strong.
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essex2visuvesi

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Re: Model Slipway Sentinel
« Reply #117 on: November 06, 2009, 01:33:29 AM »

The main drive units, Paxman Valenta V12 diesels, are used for all other propulsion.


Peter.

That boat should go like a train!


Thats the same engine as used in the first Inter City 125s
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wallace

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Re: Model Slipway Sentinel
« Reply #118 on: November 17, 2009, 04:21:31 PM »

Hi Richard  I have spent the past hour going over your pages on your build and I must say you have done a wonderful job the boat looks first class so well done,I have built two of model slipways boats and really enjoyed building.
Once again Richard a first class job.
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DickyD

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Re: Model Slipway Sentinel
« Reply #119 on: November 17, 2009, 06:24:23 PM »

Thanks Wallace, I am enjoying your build.
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wallace

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Re: Model Slipway Sentinel
« Reply #120 on: November 17, 2009, 07:14:48 PM »

Thanks Richard not been doing much for a few weeks and having just had another opp got to take things easy and its getting abit cold now,
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