1/6 scale Jetsprint boats and 30mm Jet drives

[mickieb49]

Mick, I don't know about anybody else but I would rather pay the extra $ for a Fiberglass hull over ABS any day. Fiberglass is much easier to repair and much stronger, in my opinion I wouldn't bother making a ABS hull. I'd like to hear what any body else thinks about this. When I'm looking at a hull and I see it's ABS I quit looking, I won't even consider buying a ABS hull.

I have no intention on not producing the fiberglass hulls, will definitely still have these, was going to do the ABS ones so those guys who like rock bouncing can also have these hulls.
I will be making a second mold of the new hull shape so I can make 2 at a time, it takes the same time to make 2 as it takes to make 1.

Mike, your hull looks great mate, keep up the great work. Just remember to get the COG at around the 40% mark, or around 260mm from the transom, if you have it further back you may get the bouncing you see in my videos. I am in the process of changing the instructions to reflect this change. But please keep you build updates coming, it is good everyone else can see one being put together by some one else.
I have been advised that the Marathon plans are nearing completion ( had to change a few things) so hoping to be getting these up and going soon. So sorry it has taken so long, unfortunately working full time aswell as looking after 2 kids under 3 yrs takes toll on the shed time.
Got my laser cutter on Friday so I am trying to learn how to use that too.
Take care guys
Mick

[Mike Caruso]

Hi Mick,

No Problem mate I also have Family issue's, travel for work and whatever comes up. I am happy with the hull bottom but need to rework the sides and I am starting on the deck. Have not cut down the impeller shaft so I am good there LOL. I have a couple of question that you might have told me.....brain fade.
The flow straightener vanes when mounted have to be between the vanes in the rear cone correct?
The wear ring does it matter where the little vanes are placed?
About how much of a diameter / radius is needed on the rear of the inlet to hull?

Thank you,

Mike

[mickieb49]

Hi Mick,

No Problem mate I also have Family issue's, travel for work and whatever comes up. I am happy with the hull bottom but need to rework the sides and I am starting on the deck. Have not cut down the impeller shaft so I am good there LOL. I have a couple of question that you might have told me.....brain fade.
The flow straightener vanes when mounted have to be between the vanes in the rear cone correct?
The wear ring does it matter where the little vanes are placed?
About how much of a diameter / radius is needed on the rear of the inlet to hull?

Thank you,

Mike

Hi Mike,
the flow straightener vanes need to be lined up with the vanes in the rear cone.
The vanes in the wear ring does not mater what orientation they are.
On the rear edge of the inlet you need to only bevel it backwards at approx. 45 degrees, this is to release some of the pressure built up in the inlet.
Regards Mick

[Mike Caruso]

10-4

[timjz]

Hi Tim,
The problem with flat bottoms is the side slippage causing turbulence into the unit on turns, will work just not optimum.

I get that it won't be the best setup, but I've wanted to build both a little jet boat & a SK Daddle for a really long time.
I was really happy to see this pump come out, it looks pretty scale + it has an actual impeller, not a cut down prop!

So...will I need a skeg?

[mickieb49]

tIM
Its not that It wont work, it should work quite well, just not the optimum. Maybe ad some Loader gates? I am not entirely familiar with these , maybe someone else may chime in here?
regards Mick

[mickieb49]

Hi Guys, well the new hull is a success:

http://youtu.be/EuKOXa8jK_0

4 hulls are on their way to Steve at Off shore electrics.
Regards Mick

[Mike Caruso]

Runs sweet Mick.

[Darin Jordan]

I received 2 of these drives from OSE.COM. Look vert nice. I'll be doing a conversion thread shortly using a Pro Boat FasTEC hull. Looks to be perfectly sized.

[mickieb49]

Thanks fro the kind words guys, Darin if there is anything you need please let me know, I am in the process on hooking Steve at OSE up with a lot of spares too. Please post your build here, I am most interested on seeing what other people do with the jet units.
Regards Mick

[Darin Jordan]

Thanks fro the kind words guys, Darin if there is anything you need please let me know, I am in the process on hooking Steve at OSE up with a lot of spares too. Please post your build here, I am most interested on seeing what other people do with the jet units.
Regards Mick

No problem, Mick. It's going to be a fun project.

I haven't measuered it yet... can you tell me what diameter the driveshaft is??

[Mike Caruso]

4mm hard shaft needs polish for light fit BOCA 4x6 fits in the tube, Ceramic balls SS the rest. I think a wire drive would be easy on this one.

[mickieb49]

Thanks mike for chimming in mate, been a little held up trying to get 10 hulls built, so not much time here on this forum.
Anyone out there had much to do RC groups? I posted a few things over there, seems like there is 2 guys that are the self professed wizards and a whole heap of sheep? And not really that much actually going on? anyone else out there found this to be the case?
Regards Mick

[timjz]

I've begun laying out my SK build with the jet drive.
Is the drive to sit flush to the transom as shown? Or is the transom to be cut out to the hexagonal shape of the drive so everything will screw together tightly?
I guess I'm wondering what the maximum transom thickness should be.
The drive itself is a really slick little assembly, it's sized just right to the hull!
Thanks, Tim

[mickieb49]

Hi tim, please send me your email to : [email protected] and i will send you some revised instructions that will now also include the installation of my units.
Basically the hex part is ouitside the hull by about 5 mm, the hex ring is actually a seal support , you will need to get some thin rubber to clamp between the hex seal support and the transome, i also add some silicone here too.
Hope that clears up your query.
BTW, there is 4 hulls on their way over to steve at OSE, so please look out there.
Regards Mick