Twin out-board cat discussion

[Darin Jordan]

Thank you very much for the info Darin! I use my outboard on my rescue boat and I would love to use a 447/3 on it.

No problem... that stub has about 1/4" or so more length. 447 should fit without any trouble.

[F1 madness]

If you replace the stub shaft assembly with one from Hyperformance Products, you'll have plenty of length, and a stub that will last a LOT longer than the standard K&B:

http://hyperprod.bizhosting.com/psa35.html

Cool project.... I'm going to be doing a dual outboard conversion on a ProBoat Miss Geico later this summer, but I'll be using dual ProBoat Stiletto Outboards on it with dual BlackJack or Stiletto power systems... Should be a fun project!

Alrite Darin,i look forward to seeing your version with awesome looking outboards,and the geico.
Im looking forward to start the actual build,but for now its just working all the measurments out,im pretty sure i can get it to look very simular to the 1 in the pic,but with my own touches (hopefully LOL)
Will keep posting with updates maybe even a few pics once drawn up.

[DPeterson]

Awsome guy's. Looking forward to more pictures of dual outboard cats. Here's mine for some inspiration. Ran it this past weekend. I have a lot of work to do. All it did was porpuse. Could not get it on plane. When I hit the throttle it wanted to flip sideways. Probably will have to convert to counter rotation. I think too I had it way over propped.

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[F1 madness]

Awsome guy's. Looking forward to more pictures of dual outboard cats. Here's mine for some inspiration. Ran it this past weekend. I have a lot of work to do. All it did was porpuse. Could not get it on plane. When I hit the throttle it wanted to flip sideways. Probably will have to convert to counter rotation. I think too I had it way over propped.

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Man thats cool,what outboards you using on that they look ace.
Hope you get it sorted be sure to get a couple of vids,be interesting to see it go

[Darin Jordan]

Awsome guy's. Looking forward to more pictures of dual outboard cats. Here's mine for some inspiration. Ran it this past weekend. I have a lot of work to do. All it did was porpuse. Could not get it on plane. When I hit the throttle it wanted to flip sideways. Probably will have to convert to counter rotation. I think too I had it way over propped.

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Doug,

On an OPC, when you raise up the outboards, it actually causes the nose of the boat to raise up (loosens up the front of the boat).

Might need to play with the outboard height. I'd keep the neutral, but adjust the prop depth and see if lowering it helps.

How does it balance out, by the way? Got any shots of the inside?

[Eodman]

Yup raise the height on the transom not the angle or tilt from the transom! Is that a toysport jolly if it is did it come with the extra part in the tunnel? Mr Toth came up with the part to help with the porpoising!

[Eodman]

If you go on Aqua Crafts site and look at their EP1 outboard - they have a pdf of the owners manual and in it - it shows a good starting spot for placement of the outboard on a transom!

[Eodman]

I'm using the Hi-Performance 3.5 lower leg kit that Steven sells here on his site and I picked up a couple of 1700 kv brushless out runners from South River RC to try. These motors are the red ones on his site and if I remember right were $39 bucks a piece! So if it doesn't work I'm not out alot of money!

[F1 madness]

I wanted to use these legs (bullet drive),but was having difficulty finding dimentions needed,so settled for the OS leg.

[F1 madness]

Heres a quick drawing of the outline of the hull,side on view,all i got to do now is draw up the all the parts then get some board and start transfering it to that.

[F1 madness]

LOL do you reckon a pair of these would work:

Just kidding

[DPeterson]

F1 Madness

Man thats cool,what outboards you using on that they look ace.

The outboards are KMB gear drives. Went with these cause I had them and I was looking for extreme scale.

Darin

Might need to play with the outboard height. I'd keep the neutral, but adjust the prop depth and see if lowering it helps.

How does it balance out, by the way? Got any shots of the inside?

I built it without the adjustable plates as I only had one of them. Critical mistake I think. CG is close to 30%.

Eodam

Is that a toysport jolly if it is did it come with the extra part in the tunnel? Mr Toth came up with the part to help with the porpoising!

Yes the Toysport Jollycat. Never seen a better quality built hull. What is this extra part you speak of? Thanks for advice on the auquacraft site.

I am going to focus first on getting one the outboards set up for counter rotation. Then see what happens. Will probably order another jack plate.

Doug

[ozzie-crawl]

think he means the tunnel extension

[F1 madness]

Well hopefully,i may have some new outboard legs to try,completely new not even on the market,but if all goes well they maybe,they should be more suitable for big power brushless motors 3/16 flexi and stubshaft,and be able to run upto 60mm props with cavitation plate tith water pick up,they have 12* angle change and 12mm height adjustment,will accept any motor with hole spacing up to 30mm.once i have 1 will post some pics,these will hopefully be available in cast alloy,or carbon poly.
Will keep you posted

[Eodman]

do a search for eodman oanmd then jolly magic part! yes it is the extension!