BarraMan's Mangusta 21 barraboat in Townsville, AUS

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BarraMan
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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by BarraMan »

Nice work BM.
That should keep your catch in prime condition for the table.
Is the cooler going to be fixed in place, or removable?
Essentially fixed, but easily removed if desired.
And one final question, is tinted epoxy subject to the same UV degradation as untinted epoxy?
Yes, I believe so, but Its being custom built to fit nicely in a large hatch under the front casting deck, so will not be exposed to sunlight. Being under cover should make it more efficient as well.



reefie
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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by reefie »

Gotcha.... thanks :D
"If you want something you have never had, then you've got to do something you've never done"

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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by fallguy1000 »

My boat build is here -------->

viewtopic.php?f=12&t=62495

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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by Christer »

Lee, I've read through everything I could find about this build with regards to the scaling, but can't find any mention of how much extra material you needed compared to the standard BOM. Do you have a rough estimate? I'm guessing it was more than 10%...
8ft dinghy built in 1992, BBV sufferer ever since.

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BarraMan
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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by BarraMan »

Christer wrote: Sat Nov 24, 2018 12:23 pm Lee, I've read through everything I could find about this build with regards to the scaling, but can't find any mention of how much extra material you needed compared to the standard BOM. Do you have a rough estimate? I'm guessing it was more than 10%...
Christer, increasing the dimensions by 10% will increase the area of panels, bulkheads etc by 21%.

So, at least 21% more ply, glass cloth, epoxy, paint etc!

The volume of the hull will increase by 33%, so you get quiet a lot of bang for your buck in terms of increased room, displacement etc!

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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by Christer »

BarraMan wrote: Sat Nov 24, 2018 5:19 pm
Christer wrote: Sat Nov 24, 2018 12:23 pm Lee, I've read through everything I could find about this build with regards to the scaling, but can't find any mention of how much extra material you needed compared to the standard BOM. Do you have a rough estimate? I'm guessing it was more than 10%...
Christer, increasing the dimensions by 10% will increase the area of panels, bulkheads etc by 21%.

So, at least 21% more ply, glass cloth, epoxy, paint etc!

The volume of the hull will increase by 33%, so you get quiet a lot of bang for your buck in terms of increased room, displacement etc!
Excellent, thanks a lot. While I still haven't decided on which boat to build, I need to know what I'm looking at if I should decide to scale my boat when the time comes.

Would you say it was worth it? Or put another way, if you were to build another Even Bigger Barra Boat, would you scale it again, even with the added cost?
8ft dinghy built in 1992, BBV sufferer ever since.

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BarraMan
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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by BarraMan »

Would you say it was worth it?
Christer, I think building your own boat is a personal thing. You go with a design that best fits a set of criteria that you have defined, but what works for one person may not work for another.

In my case, and I have told this story before, I have earned my living with my brain but have always been reasonably "handy". I have always wanted to build a boat and tell people who ask "What made you want to build a boat" that there was a boat in me that needed to get out.

The final triggers for me were:

1) that long-term desire to build a boat
2) a growing desire to chase barramundi in some of the more remote parts of northern Australia in safety and comfort
3) impending semi-retirement and the need to fill the looming "work" gap

I had never built a boat before starting on this one and I had never worked with epoxy before. Most boat building sites will say to build something small to feel your way into boat building and learn the required skills. I rejected that concept as I already had a smaller boat and decided that if I was going to build something it was going to be the boat I wanted.

Having looked far and wide, I finally settled on Jacques Mangusta 20 hull as the one that I though would best suit my mission - 18o deadrise at the transom, long enough to deal with the short frequency north Australian "chop", well powered and reasonable fast, strong and unsinkable.

Then I read somewhere that Jacques had said you could scale the plans up by 10%, and I thought "If I am going to do this I might as well build the boat as large as possible, and immediately moved to scaling it up by 10%. I really didn't consider the consequences of doing that in terms of increased building cost, issues with where I was going to be able to build it or house it afterwards, the need for a large tow vehicle or a higher specification boat trailer for it. My boat is right on the limit for what you can tow on the highways without a bunch of restrictions, signage and speed limits.

I just got stuck into building it!

Everything is at least 20% more than it would be if built as designed - materials, labour etc

I didn't even build the boat as designed. I built it as a side console with fore and aft casting decks - only the basic hull is "as designed".

The end result is a large, fast, comfortable, safe boat that can travel long distances (200+ nm range) and is a very stable platform for the lure casting type of fishing that I like to do. Where we fish, the boat is your life support system. If you end up in the water there a lots of critters that will eat you for breakfast, lunch or dinner!

Was it worth it? Absolutely! For me, at my time of life. I spared no cost in building it, and it is full of the best of everything in the way of "toys" (BIG o/board, sounders. chart plotters, trolling motor etc), but it cost me waaaay more than I would have imagined. If I was still trying to raise and educated my kids it may well have ended up yet another unfinished dream. I love it - as do my mates who have been fortunate enough to fish out of it.

I think this pic sums it up. Four of us are headed out some 50nm from our base camp for a days fishing, sitting on 26-28 kts. If you search for "Fat Fellows Creek, McArthur NT, Australia" in Google Earth you will see where we spent the day.

Image

Or put another way, if you were to build another Even Bigger Barra Boat, would you scale it again, even with the added cost?
If I was building for myself, yes - in a heart beat!

However, as I have said before, if I was 20 yrs younger I would seriously contemplate building this type of boat commercially. I would not scale it up and might actually scale it down by 10% because I think there is a bigger market for boats in that size range - lower build cost, smaller hp requirement, lower specification trailer requirement, lower spec tow vehicle requirement.

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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by antoniekruger »

Hey, where are the pics of the Barra's????
CC14 splashed
CS23 almost there

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BarraMan
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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by BarraMan »

I worked out last night that I towed my boat some 12,000 miles in 2018, put 100 hrs on the motor and probably spent five times those hours on the water, on the electric trolling motor.

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Re: BarraMan's Mangusta 21 barraboat in Townsville, AUS

Post by OrangeQuest »

I don't know how ya'lls taxes work down under but in the USA that would be a nice tax deduction, it's work related right? :roll:
Maybe need an hour meter on your trolling motor.
"that it isn't just an ordinary sort of boat. Sometimes it's a Boat, and sometimes it's more of an Accident. It all depends." "Depends on what?" "On whether I'm on the top of it or underneath it."
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