mickieb49

Hello guys, this is a project i have been working on for the past 9 months, finally i can offer 30mm Jet units and Sprint Boat hulls.
The jet units are Injection Molded ABS, with an Alloy 3 bladed 30mm impeller, units also have adjustable trim ( so you can hook up a 3rd channel to change it on the go)
The hulls are 610mm long, come in White Fiberglass, if you buy the kit which is the Jet unit, Hull combination you will also get the Alloy rollcage with CNC'd clamps and 2 dummy drivers.
For orders please visit my Facebook page under " Mickiebeez".

Here is a little video:
http://youtu.be/BIY6MBf0iiM

martno1fan

Nice work looks like it will go even better once you sort out the cog a little to get rid of the hopping.
Mart

mickieb49

http://www.youtube.com/watch?v=nBOnXU8LuLE

I have now got a Facebook page under " Mickiebeez"
Regards Mick

ssinnett

Hey. im interested in one of these. how much you asking for it? Have you done testing on them? How do they perform? Pm me maybe you can just text me.

mickieb49

HI,
I sell these as a kit, $295 USD plus shipping, as yes I have tested these quite a fair bit, please see my website for more pictures and videos. Pm me or email me if you have any further questions.
http://mickiebeez.com/#.UtSPHQ3XCnU.facebook
Regards Mick

mickieb49

Heres todays run, removed the lower lifting strake, just got to move the C of G forward and I am sure it will settle it down. I think the jet unit may be a little too much for this hull as it is sucking the back down more than I thought, lifting the bow too much , hence the skipping.
http://youtu.be/GudJfAzxYRc
100% Take care guys

sundogz

Have you tried trimming the nozzle to tame the porpoising?

mickieb49

Hi Sundogz, Yep Am trying a few different things at the moment to get it all to settle down, next video I post will be all sorted.
I any one wants one of these units PM me.
Regards Mick

sundogz

Trimming the nozzle down a bit might fix all that. I've even had to install trim tabs on a boat that had a disproportionally powerful pump. But it was worth the effort! Good looking boat and drive, btw.

mickieb49

Thanks Sundogz,
Here is the latest
http://youtu.be/tNX2TmabXLU
100%

sundogz

Yes it still hops a bit, even with just a little throttle applied. It's as if it has some rocker in the hull. With the length of that pump & nozzle it should have plenty of leverage to settle it when trimmed downwards. Can you post a pic of the bottom of the boat?

mickieb49

Hi Sundogz.
The bottom is straight, i am thinking on removing all of the lifting strakes, wondering if the unit is fighting the strakes??? i will upload some pictures after work. Still playing around with a few things, but will run out of ideas soon.
Regards Mick

sundogz

Yes, you may need to remove or modify the strakes. On a Jet Sprint they are primarily used to reduce side-slipping (drifting) anyways, and your keel will do that. That may be the problem.

mickieb49

, if the removal of the strakes, i may CNC out another plug, this time about 100mm longer, my other theory is that the back end of the hull is being sucked down too much ( too efficient unit) in comparison to the hull width and length.
I am giving it another run this weekend, so i will see how it goes with the strakes removed.
Cheers Mick

sundogz

Sounds good. If you get a chance, do post some pics of the bottom of this boat.

mickieb49

will do, i will try to post some when i get home.

mickieb49

Here is the pic of the bottom as it is now, I still have to remove the remaining strakes, but now I am looking at cncing out a new plug.

mickieb49

Hi guys here is the latest run

http://www.youtube.com/watch?v=sR4ht...ature=youtu.be
This is with the lifting strakes removed, I will re rout out this length plug and redo the mold, may do the longer version after I do the Marathon hull.
Take care
Mick

fuma

that boat is too light in the bow get some weight up there and it will settel down

mickieb49

I have done just that, if i put too much more weight up there the C of G is way out of place.

fuma

sometimes with more power we have to move cog forward

sundogz

Sorry, been away a bit. Saw the new video. Mickie, those (remaining) strakes shouldn't be causing that porpoising. The bottom looks good. Didn't it make a difference when you trimmed (the jet drive nozzle) down? It should have brought the nose down hard. If it didn't, then I agree with Fuma, move that batteries forward until it stops bouncing. The center of gravity is determined after it smooths out and rides correctly. You aren't quite there yet. Once you've moved the COG enough to stop the porpoising, it may heat things up a bit more (iIt's all give and take). If that's unacceptable, you can always install trim tabs. But I think it will be fine. Plenty of power with that drive/motor combo.

mickieb49

Hi Sundogz,
Mate, the trim made a huge difference, also adding a little more weight up in the nose also helped, maybe a tad too much power in the jet.

sundogz

I thought that would help. Maybe a tad too much power, but we won't quibble about that! Looking forward to the latest video

mickieb49

Hi guys , here is the latest video of the new hull, has no problems now.
https://www.youtube.com/watch?v=EuKOXa8jK_0
cheers Mick