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Virgin Atlantic challenger 2

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Nick Watson 202/02/2018 11:14:03
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16 forum posts
38 photos

Hi everyone,hope you like my representation of vac2.couldnt find any plans to build from,so its built from an old hull(originally was a copy of the italian challenger)so not quite the right shape.ive modified the stern to make it close to real thing.couldn't find a supplier for the drives,so i made my own.work really well as long as your not heavy handed.superstructure built from balsa scaled up from a drawing I did from a photo. Not an exact copy but close enough for me.part of the fun of our hobby with a dash of poetic license. img_20180202_102436.jpg

ashley needham03/02/2018 10:15:01
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7353 forum posts
156 photos

Hi Nick and is it welcome to the forum? I see you have two albums already!

​Very interesting, and having just looked at pictures of the real thing, a good representation at the rear. Do I presume the cowls are for steering, and if so how effective are they? Also do you use differential prop control.
​Ashley

Edited By ashley needham on 03/02/2018 10:16:22

Nick Watson 203/02/2018 11:17:57
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16 forum posts
38 photos

Hi Ashley,yes she steers very well with them.no need for differential prop control,both motors run up proportional to each other, obviously they contra rotate. The more power you put on the quicker she turns,very much like the real vc2 its designed go in a straight line rather than sharp turns,but it will spin out an bite you if you get too heavy with the rudder stick. Took a bit of work to get it right,also prop choice was a big bug bear.thanks for the welcome.

Nick Watson 203/02/2018 11:39:25
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16 forum posts
38 photos

Stern shot

Nick Watson 203/02/2018 11:40:54
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16 forum posts
38 photos

Hope fully these are better shots

Nick Watson 203/02/2018 11:41:54
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16 forum posts
38 photos

Stern shotHope fully these are better shots

John W E03/02/2018 17:40:12
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276 forum posts
272 photos

002.jpg001 [800x600].jpg

hi ya Nick intriguing build - looks interesting the twin drives and rudders - as far as plans go there are a set of semi scale plans for the Virgin atlantic 2 boat issued with model boats mag, back in the 1980s - which I built my version from - and so have several others on this Forum. Although this version is only single prop, it suffers from cavitation if you try to do tight turns with it A member of this forum has managed to rectify this problem by fitting a standard dagger type rudder instead of the horseshoe. Here is a link to one or two of the builds on this forum which you may find interesting.
http://www.modelboats.co.uk/forums/postings.asp?th=52626002.jpg

John W E03/02/2018 17:47:06
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276 forum posts
272 photos

just been trying to get the link to work - but I cant for some reason - my browser isn't allowing me to copy and paste it properly. Maybe Mr Bishop will be able to put it right - or if you wish - just type in the search box Virgin Atlantic 2 and this brings up several postings on the topic.

John

Nick Watson 203/02/2018 19:44:39
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16 forum posts
38 photos

Thanks bluebird for the feedback,I had cavitations issues to start with.found the cure was to use a hydro style prop.I ran my miss bud replica on an s and an x type prop and all it did was cav. Wouldn't even get up on plane.switched to a hydro style and it thrives on cavitations an goes like stink.when I was building the vac2 I spoke to a really helpful guy in Germany called Klaus who is the design engineer for the company that builds the full size drives,according to him you need a multi blade cleaver style prop or one that's designed for semi surface drives.a hydroplane prop. That's what mine has and you can turn as tight as you like,to the point it will spin 180 degrees if I push way too hard.

ashley needham04/02/2018 08:40:06
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7353 forum posts
156 photos

Very true regarding x and hydro style props. I have a hydro prop fitted to the Pontoon boat, and although it doesn't look a lot different to an X, it does make the difference on the water.

Ashley

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