R-42 Twin Beast

[srislash]

Looks good, really like the strut/flooded tube in the sponson idea. I look forward to seeing the hatch design take shape

I will be a little 'unconventional' on this one. That tunnel section may end up empty. I am still brainstorming.

I will post more pictures is you want me to.

Your thoughts/ideas are always welcome Randy.

[srislash]

Neither of the R-42s I've owned had the right sponson deeper in the water than the left - they are both exactly the same depth from the tunnel bottoms. And both sponsons had a slight amount of hook designed into the last step. Has Andy changed the boat's design in the last two years?


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So this is where I eat CROW. I put the hull on a sheet of glass after work and Jay and Oscar are correct. Both sponsons are even with each other and the last step is 'hooked'(for lack of a better term), just like the famed Cheetah hulls.

There is a pic either on here or in a private e-mail of one of the hulls which I stated had a deeper step and this one in particular was what came up in discussion with Andy and perhaps he thought I was talking about the 'hook'.

Anyway, my apologies for misleading the thread and Jay and Oscarel. So here are pics of the said 'hook:

[srislash]

I needed to make up a couple transom doublers. Though there is some beefy FG for the rudder mount there was nothing at the rear of the sponsons. Some 4mm CF/FG plate I had here made a nice fit:



So now they are epoxied in

[flraptor07]

This thing is gonna be a beast! And Crazy fast, can't wait to see it run!

[high-tech]

I think you gonna wanna be down in the sponsons and as close to the inside as possible

[flraptor07]

I think you gonna wanna be down in the sponsons and as close to the inside as possible

I agree, this is the way I setup my Cheetah.

[srislash]

I think you gonna wanna be down in the sponsons and as close to the inside as possible

Flood tubes guys, flood tubes are the plan. Versatility is what I am after here. But I will keep things as low as possible including the motors. Still brainstorming there. Thinking half tall mounts but with rear supports.

[Fluid]

Vertically adjustable struts can be a big advantage. Too many twins mount their stingers too low on the sponsons, ending up with either too much lift or the inability to unload big props. Saw this again today at the SAWs, the lack of vertical adjustment limits potential boat speed. Good plan Shawn!




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[srislash]

Vertically adjustable struts can be a big advantage. Too many twins mount their stingers too low on the sponsons, ending up with either too much lift or the inability to unload big props. Saw this again today at the SAWs, the lack of vertical adjustment limits potential boat speed. Good plan Shawn!




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Thanks Jay, oddly enough I think I have been doing the opposite. I was happily running 5017 props on my Shocker(my first brushless twin build) with good temps and amp draw.

I have had same with my Fantasm but recently got it aired out better and now need smaller props as now they dig in more.
These are the issues I have run into with 'fixed' stingers and here had the chance to try something different.

[oscarel]

And you'll save a little money going with struts. I also had the problem of not being able to move the stingers up. Good call.

[srislash]

I made a template so that I can take it to the drafting table to lay out the rudder/struts



And you can see I have a motor template stuck in there. I am waiting on those till the hardware is mounted to get a better fix on motor location. I am very close there as I did a previous CG layout.

So here is my blank slate:



And the question is; Whether or not to splay the struts to match up to the top deck curvature or do the whole layout 'square to the world'?

[flraptor07]

I'm thinking splayed, for this reason. It will give you another slight dimention in adjustability, being side to side. Weather it makes any difference or not, who knows?

[RCKong]

Hi Shawn,
What if you put spacers on each side of the strut in between the mount bracket ? You could get side to side adjustments on the strut also.

[jj2003]

Flood tubes guys, flood tubes are the plan.

Hi Shawn,
Please post pic's of your flood tube setup when you get there. This idea is new to me and I'm not sure how it works. I've seen Rockstar's pic's of his set up on his big mono but I believe he did a quick write up and there were no detailed pic's of how to set it up and I'm not sure I understand advantage/disadvantages of it. Thanks JJ.

[RCKong]

LOL Chris and I posted about side to side adjustment at the same time...