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Author Topic: Atlantic 75 Build  (Read 5745 times)

colin-stevens

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Re: Atlantic 75 Build
« Reply #25 on: November 30, 2007, 07:06:31 PM »
been doing a fair amount of fettling and research in to new camera. see if it improves my david bailey'ness.
the outboards have had to be reworked with a different gear arrangement, from a helicopter spares selection. trouble is i now have a ratio of 2:1 ( i think)
some bits have been added to the tubes and the spray rails have been started, and they are a pain.
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colin-stevens

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Re: Atlantic 75 Build
« Reply #26 on: February 24, 2008, 05:19:32 PM »
After months of messing about, it finally got a proper test run today. To say the speed was a disapoitment is putting it mildly. Speed was totall failure. Probably due to the fact the bevel gears are 4:1, slowing the shaft speed down by a quater. I could try fitting faster motors, but i realy dont want to go to that expense, plus the are a lot larger and i realy want to keep it to scale as much as possible. Gutted, all that work. Had time to think while sitting in a traffic jam on the way home and came to the conclussion the only thing to do was put in a single motor and bite the bullet.
oh well. Just hope that gets her on the plane.
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hama

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Re: Atlantic 75 Build
« Reply #27 on: February 24, 2008, 06:43:15 PM »
Hello!
Your outboard is wonderfull, a pity if you cant use them. Isn't it possible to change the gear ratio some how? Hope you sort it out, good luck!
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johno 52-11

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Re: Atlantic 75 Build
« Reply #28 on: February 24, 2008, 11:40:16 PM »
Hi Colin,

I built my outboards with a 1:1 gaer ratio take a look at my build pages at www.lifeboatmodels.co.uk/altlantic

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Shipmate60

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Re: Atlantic 75 Build
« Reply #29 on: February 24, 2008, 11:47:59 PM »
Is the any way you car reduce the gear ratio?

Bob
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colin-stevens

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Re: Atlantic 75 Build
« Reply #30 on: February 25, 2008, 08:45:33 AM »
Johno, started off with the gears you recomeended. trouble was i couldnt keep them meshed, the tolerances were to fine for my kitchen table and brass tubing to handle. Beleive me i tried. But have now just given up. Hull now has a single prop shaft sticking out the bottom, UUUHHHGGGG!!!!.
May try again some time in the future.
colin
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explorer750

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Re: Atlantic 75 Build
« Reply #31 on: February 28, 2008, 06:38:52 PM »
Could you kit bash the KMB Wiking hull into a RNLI resue craft. Also due to its larger size could normal outboards be used.

http://www.jet-drive.de/cms/component/option,com_virtuemart/page,shop.browse/category_id,60/Itemid,17/
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colin-stevens

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Re: Atlantic 75 Build
« Reply #32 on: March 31, 2008, 08:24:35 PM »
after what seems like forever off rubbing down peeling paint, filling, sanding, filling sanding and all again. then masking choking, masking , choking i have an end result. none too pleased with the result, but i'll live with it. not too bad, could be better.
stilll a long way to go, outboards to be rubbed, primed, rubbed primed. boring.
oh well.
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colin-stevens

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Re: Atlantic 75 Build
« Reply #33 on: March 31, 2008, 08:27:44 PM »
and a few more
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