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Author Topic: Atlantic Challenger  (Read 8756 times)

6705russell

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Atlantic Challenger
« on: June 19, 2016, 07:53:03 PM »

Amongst other builds I have made a good start on the Challenger, not quite sure if it will end up as the stand off scale Virgin boat or not but more on that as the build progresses, the grp hull was to thin and flimsy for my liking so the thickness was doubled with fibre mat and resin, the decks have been fitted and the water jet drives dry fitted to check everything lines up..


Would this type of boat have any anti fouling on the hull, I presume this type of boat would be kept on land until needed?


Thanks


Russ























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Martin [Admin]

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Re: Atlantic Challenger
« Reply #1 on: June 19, 2016, 10:12:01 PM »


Wow! Nice work!   :o

(  Whose hull? )

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derekwarner

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Re: Atlantic Challenger
« Reply #2 on: June 19, 2016, 10:26:21 PM »

Jet boat builds and equipment are very interesting Russ......so you will have many followers :-))

What are the principal dimensions?.......[about 48" O/A?]

Keep the images coming............ Derek
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6705russell

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Re: Atlantic Challenger
« Reply #3 on: June 20, 2016, 09:02:14 AM »


Wow! Nice work!   :o

(  Whose hull? )



It is the graupner kit...
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6705russell

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Re: Atlantic Challenger
« Reply #4 on: June 20, 2016, 09:03:37 AM »

Jet boat builds and equipment are very interesting Russ......so you will have many followers :-))

What are the principal dimensions?.......[about 48" O/A?]

Keep the images coming............ Derek

Hi Derek

The length of the hull is 1220mm and with the water jet protection it will measure around 1320mm..
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derekwarner

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Re: Atlantic Challenger
« Reply #5 on: June 20, 2016, 09:26:05 AM »

Evening Russ..............

I just guestimated 48" length of hull from the length of your B&D type work bench :o

48" = 1219mm, so the actual of 1220mm was pretty close  %)

The little we see in the robustness of construction appears very sound......so let's see the progress

Derek

 
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IKB

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Re: Atlantic Challenger
« Reply #6 on: June 20, 2016, 12:42:35 PM »

Hi Russ,

Looking forward to seeing this build progress, what are you planning motor and battery wise?

Alex
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6705russell

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Re: Atlantic Challenger
« Reply #7 on: June 20, 2016, 12:54:02 PM »

Not to sure on size yet but they will be brushless, maybe 650kv,s?  I am a little old school and still like my lead acids for batteries, if people can assure me that lipo,s will not blow up in the middle of the lake I might be tempted to go down that route.
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IKB

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Re: Atlantic Challenger
« Reply #8 on: June 20, 2016, 01:03:37 PM »

Hi Russ,

I am running Lipos in my jet drive build and they are fine, the big problem I am having at the moment is with motor selection, as I am relatively new to brushless motors, I am finding the selection process to be a tad confusing. I am making my own jet units based upon the same Graupner ones you have, these units operate around 18-20K RPM, so I have been making my motor and battery voltage choice accordingly, 17-1800KV on 3s, tests with a watt meter on the lake are showing horrifying current draws at full power though, full power cruise is 100A, where as half throttle cruise is 30A.
This is the part that confuses me, to obtain the motor's peak power rating, I need to up the voltage to 6s, but won't also double the RPM? or am I missing something fundamental here?

Alex
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6705russell

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Re: Atlantic Challenger
« Reply #9 on: June 20, 2016, 01:44:07 PM »

Hi Alex

It has been a while since I dabbled with brushless, I shall have to look at my past builds on here, the last time was back in 2010 when I built the 1/12 Tamar, I am fairly sure they were Turnigy 750kv running on either 12 or 18volt with Seaking 60amp speed controllers, I will be doing some research soon so will let you know what I end up with...
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6705russell

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Re: Atlantic Challenger
« Reply #10 on: June 20, 2016, 03:07:21 PM »

After a little research I think these will be something like what I will be going with...

http://www.overlander.co.uk/motors/brushless-motors/tornado-thumper-v2-4240-10-890kv-brushless-outrunner-rc-motor-latest-model.html


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TomHugill

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Re: Atlantic Challenger
« Reply #11 on: June 20, 2016, 05:11:57 PM »

Hi, I used 1100kv  3674 turnigy inrunners on 4s in mine. I got rid of the belt drives. It went well....

https://youtu.be/uxwBmg0tmsU
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6705russell

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Re: Atlantic Challenger
« Reply #12 on: June 20, 2016, 08:41:55 PM »

Interesting Tom, it goes well, do you have the belt pulleys spare?
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TomHugill

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Re: Atlantic Challenger
« Reply #13 on: June 21, 2016, 12:04:03 AM »

I have a lot of them some where, I bought all I could find as spares. Seriously though with brushless you'll just shred the belts. And with those motors and the gear reductions you'll be only getting maybe 7k rpm (860x14.8x0.5). I'd go direct drive.
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6705russell

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Re: Atlantic Challenger
« Reply #14 on: June 22, 2016, 08:14:56 PM »

A little premature I know but some of the engineers/crew turned up today....








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Ianlind

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Re: Atlantic Challenger
« Reply #15 on: June 23, 2016, 07:44:51 AM »

I used an earlier set years ago which didn't include any females, but found the poses were a bit unsuitable for tug crew.  So cast some in urethane after chopping them and re-posing to suit.
They are well detailed though.


Ian.


 
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6705russell

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Re: Atlantic Challenger
« Reply #16 on: June 24, 2016, 10:18:44 PM »

A little more done, superstructure is coming along and made the rear wing and mounted the radars, the rear wing took a fair bit of filler to get right...




















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john44

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Re: Atlantic Challenger
« Reply #17 on: June 25, 2016, 07:45:55 AM »

Looking good Russ, 10:18 pm past your bedtime ain't it {-)


John
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6705russell

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Re: Atlantic Challenger
« Reply #18 on: June 25, 2016, 08:16:45 AM »

Cheers John, yes the damned boating bug looks to of bit again  :embarrassed:
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6705russell

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Re: Atlantic Challenger
« Reply #19 on: June 26, 2016, 03:21:57 PM »

I have fitted the air ducts to the rear wing and lined the deck in styrene, not a fan of plywood decks for the finish, new crew in better boating attire turned up yesterday, will try paint these in the next couple of weeks...















































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john44

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Re: Atlantic Challenger
« Reply #20 on: June 26, 2016, 06:12:11 PM »

Impressive figures Russ, are they a Italieri product?


John
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6705russell

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Re: Atlantic Challenger
« Reply #21 on: June 26, 2016, 06:38:43 PM »

Hi John


They are Tamiya 1/20 Tire changing crew, I am fairly sure they are very similar figures to the Yacht crew they did years ago, figure painting not one of my strong points though, never mind, they won't get noticed in the middle of the lake!




















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6705russell

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Re: Atlantic Challenger
« Reply #22 on: July 09, 2016, 06:25:47 PM »

I managed a few hours in the garage today mainly concentrating on the aft of the boat, made the guard around the jets and the rear deck section with exhausts and life rafts, the main wing has been fixed,  all looking a bit on the white side but hopefully when I start detailing it should break it up.



























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TomHugill

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Re: Atlantic Challenger
« Reply #23 on: July 09, 2016, 11:34:20 PM »

I hate to be the one to point it out (and tell me to *$# off of it was intentional) but the uprights for the roll over structure should be almost flush with the edge of the deck.

A la



It could cause some issues when adding the Martini stripes!
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6705russell

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Re: Atlantic Challenger
« Reply #24 on: July 10, 2016, 07:10:29 AM »

Oh yes, never realised that, looks like I know what today's job is  >>:-(
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