Thread: stitch and tape power boat

Originally Posted by Mark Bowdidge

We just filled all the bouyancy compartments with High density expandable foam to make it Australian Builders Plate compliant

Why do you need the foam to make it compliant?

Richard

G'day Daddles,
Simply put, without it, you won't be able to register your power boat. As it's a part of the builder plate requirements for a vessels to remain afloat for a minimum period of 24 hours in the event of swamping, it needs floatation.

Obviously, the amount of foam required needs to be calculated. Also, the foam density needs to be 2 lbs per cubic ft or greater. So, using empty coke bottles, foam balls from your bean bag etc will not suffice.

It's all a part of the Australian legislation (don't you just love government burocrats) and pertains to not only production builders, but also amateurs. In the case of the Mushulu 14, all the requirements and information, for the builders plate, comes with the plans.

Here's a previous link relating to this subject:

https://www.woodworkforums.com/f33/slippery-slope-96763

Does this answer your question Daddles?
regards
Mark

Originally Posted by Mark Bowdidge

G'day Daddles,
Simply put, without it, you won't be able to register your power boat. As it's a part of the builder plate requirements for a vessels to remain afloat for a minimum period of 24 hours in the event of swamping, it needs floatation.

Obviously, the amount of foam required needs to be calculated. Also, the foam density needs to be 2 lbs per cubic ft or greater. So, using empty coke bottles, foam balls from your bean bag etc will not suffice.

It's all a part of the Australian legislation (don't you just love government burocrats) and pertains to not only production builders, but also amateurs. In the case of the Mushulu 14, all the requirements and information, for the builders plate, comes with the plans.

Here's a previous link relating to this subject:

https://www.woodworkforums.com/f33/slippery-slope-96763

Does this answer your question Daddles?
regards
Mark

No it doesn't. A closed tank will do the same thing so why do you have to fill it with foam (or bottles or petrified bulls ears or ...) ? You can't argue that the tank might fill up because you're talking about a swamping, not running it on a reef.

Richard

Daddles,
You can have air chambers if you wish, however the amount of "tank" required still needs to be calculated BY LAW.
If you decide to go with air chamber tanks instead, the walls of the tank are not allowed to be a part of the hull. It must be a seperate component. Also, in calculating the amount of air required, the 2 largest air chambers must be omitted. Now things begin to get complicated and overkill in the boats construction as you've got all these "tanks" being built everywhere. Its just too easy to use foam, as foam chambers can be a part of the hull walls and it's easier to construct.

G'day Everyone,
here's a couple more pictures of what we're up to now. Bogging and fairing the interior glass tape for a smooth finish. This is one job I loath. The bright side of it is, getting closer to hitting the water. !!!!

Looks great, i've been following this build on your website and just found this thread. Hope to see it finish up soon!

G'day Chubs,
Today we managed to get out there and fair all the interior bog, go over with a fine tooth comb checking for any voids and re-touch up. We hope to be priming in the next day or two. Tomorrow we're off into town to check out the paints !!

Martin hasn't stopped raving about it's performance since launching his
regards
Mark

So... i'm itching to know... any progress with the painting?

G'day Chubs,

We were about to topcoat the exterior, but our neighbours ( cane farmers) asked could we wait a few days as they were cutting their Sugar cane and then re-planting. We have a really good relationship with the local Sugar Cane farmers around us, they work within our wants and so we work within their's.

So we'll be starting up again towards the end of this week.

So Chubs, we itchin just as much as you to get it on the water.

Here's we we are now

Regards
Mark (MRINA)

Nice of your neighbours to warn you that they're getting ready to slash their cane. I assume you wouldn't want to paint with all the cane dust in the air, getting in the paint.
I hope to build a nice big boat like that one day. So far, having a lot of fun whetting my appetite on a 1/4 scale one:
http://www.rcuniverse.com/forum/m_8972788/tm.htm

G'day Chubs,
Very nice model. Hope we're going to "hang it" in the lounge room. I actually enjoy making models, although prior I use to be in the Radio controled yacht club reacing marbleheads and 1 metres, so we made our own.

In regards to our neighbors, their properties actually back onto a Kolan river ( we're about 3kms from the ocean and about 500 metres from the river itself), so they've offered us the use of their own private boat ramps based on their properties. ( around 900 acres each) What's even better, is that there is a weir in the river, which means we get access to both salt water and fresh water sides.
Our intension soon is, to get back into modeling, but with our own designs which means Debbie and I can get into some serious "tank testing" for both our power and sail designs. Just have to build our new boatshed first

regards
Mark

G'day Everyone,
we managed to get out and do a bit more work on our boat, priming etc.









It's Time to begin top coating.

regards
Mark (MRINA)

I had a look here:
http://www.bowdidgemarinedesigns.com...ushulu_14.html

Looks pretty good so far! Bet you're itching to take it out.

Thanks Chubs,
we're targeting this weekend for launch day
Mark