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  1. #16
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    Quote Originally Posted by AZMIDLYF View Post
    Do the tanks get mounted at the CG point so fuel load doesn't affect the CG balance?
    Yes, tanks are installed on rigged CG.

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  3. #17
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    Nice...look forward to watching this progress.
    The best way to predict the future is to invent it...

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  5. #18
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    Quote Originally Posted by DJohnson View Post
    Yes, tanks are installed on rigged CG.
    Fully-rigged CG is impossible to keep at a constant with different motors and just rigging changes, unless you add weight forward. There's not enough weight in moveable rigging components to compensate for the 200#s per motor difference between 300XSs and 400Rs - especially if you are using lightweight Lithium Ion batteries. Different setback can only account for so much CG change as well. Your other alternative is changing the notch in the transom, which changes the effective CG of the boat when on the water's surface - but not when it goes airborn. Very nice looking boat design though, and you guys are already running well with your raceboat - congrats! What degree deadrise are the sponsons at the transom? I notice you've got dual lifting strakes at the rear of the sponsons - I would think that should gain you guys some mph on the top end. Did you guys test with and without them on a running boat before implementing that design into your bottom? When is your first 400R boat going to hit the water? Sorry for all the questions, I'm just intrigued by your new boat, and it's not often manufacturers post on these sites.

  6. #19
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    The rigged CG differences between our 32XR and the 32XPR is 3.5". This difference will grow when you add rear seat passengers and gear. Total weight difference is 1,300#'s roughly dry.

    Thank you, we've worked hard to produce a boat that has attractive lines, challenges the industry, and performs on the water.

    The dual strakes do help lift but there are some other bottom design features under there that produce the lift quicker especially during acceleration from rest. We're constantly prototyping to produce the most efficient hull. Our performance designs are tested in Solidworks CFD for lift, drag variations (surface/friction, cavity, vortices, etc.), and reducing the overall drag coefficient. Once we're happy with a digital test, we implement and prove the product first through our race teams. If the feature performs, it makes it way into our production boats. Always pushing forward.

    First 400R boat is being sent off to paint on Tuesday and will be rigged upon return. No worries at all about the questions, we're always on our toes. Thank you.


    -Dustin

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  8. #20
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    Thanks for your response, it sounds like you guys have gone the high-tech route with your endeavor! Best of luck with it - the high performance marine industry is not easy. It will be interesting to see if your new-school, high-tech approach beats the old gray-matter method (I would think it should). I don't know if the Victory team is using computational fluid dynamics or not with their X-Cats, but they are the ones to beat right now. I have studied pictures of their bottom, and spoken to guys that are at the races - the running surface of their sponsons have a gull-wing type arch to them. Seems as though they are trying to capture some of the energy coming off the keel to provide lift without additional drag. They run both a 30' and a 31' boat, with notched transoms and non-notched transoms. It seems as though the non-notched transom works better for them, as that's the boat I see most often in pictures from the races. The bottoms look to be fairly flat as well, probably down in the 10-12 degree deadrise range. They mainly race on smooth, short courses now, so the rougher water bottoms have no place in X-Cat any more. They basically run on large F1 courses! With all the flat running surface created by the multiple lifting strakes on your bottom, I'm seeing that you guys are going after speed in smoother water over capability in the rough as well. Use the internet as your sales tool and post up pictures and videos as soon as you get the 400R boat running - we'll all be watching for them!

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  10. #21
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    The best way to predict the future is to invent it...

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  12. #22
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    Really nice looking boat. Only thing for me with the new cats from DW and other than MTI/Skater the cockpits are very small. Not sure why they do not take advantage of all that room around there.
    I agree with Dale on the CG. As we have all seen the difference of the 400r vs 300xs's is huge on the effect of CG. Also Fuel tanks position is good but if you do not carry tons of fuel all the time that is a variable that becomes ineffective.
    I would love to see you guys do the same test with a fully rigged 400r boat and see where it is then.
    Keep up the good work. Looking forward to seeing the completed project.

    Double
    Rigged

    308 Skater w/ 300x's



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  14. #23
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    If the boat has been rigged with all of its static equipment(engines, batteries, pumps, interior, etc) and the CG placement found from this and the fuel tanks mounted at that CG point, then fuel load should change only the weight of the boat and not its balance correct?
    The best way to predict the future is to invent it...

  15. #24
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    The 32 XPR cockpit is complete. Here's what SmartMarine is saying:


    "From concept to reality, the Phoenix 32 XPR stylized widebody interior has come to life. With recesses for additional storage, contrasting paint work, hidden LED lighting, grab handles, cup holders, and an awesome JLaudio sound system, this interior provides the space needed to include all the features of the most elaborate build without crowding equipment and sacrificing aesthetics. Dash and forward side recesses can handle with ease side mounted MercuryRacing Zero Effort controls, Simrad NSS12 and NSS9 chartplotters, a pair of VesselView702bySimrad, and even a Yeti Hopper. Purposeful design lends to clean, sharp line..."





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  17. #25
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    As always Noli, thank you for the feature!

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  19. #26
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    Quote Originally Posted by Double Rigged View Post
    Really nice looking boat. Only thing for me with the new cats from DW and other than MTI/Skater the cockpits are very small. Not sure why they do not take advantage of all that room around there.
    I agree with Dale on the CG. As we have all seen the difference of the 400r vs 300xs's is huge on the effect of CG. Also Fuel tanks position is good but if you do not carry tons of fuel all the time that is a variable that becomes ineffective.
    I would love to see you guys do the same test with a fully rigged 400r boat and see where it is then.
    Keep up the good work. Looking forward to seeing the completed project.
    In regards to the CG, we've pre-weighed every components we put into a rigged boat to determine the moment generated by each part; everything meaning motors, whether 300XS or 400R's, their specific rigging, then the seats, windshields, bilge pumps, hatch hardware, chartplotters, hydraulic lines, thru hull fittings, etc. I mean ALL of it. The sum of these moments produce a CG of their own. This figure paired with the CG of our bare hull gives us our total rigged CG. We then move rigging & motor offset around to adjust the total CG (setting up a spreadsheet in excel with all formulas built into it helps a ton and makes rigging decisions quick and easy to determine). The difference between a rigged 300XS and 400R we have within 3.5". This also helps us place the fuel tank directly on the CG so that fuel level does not alter the attitude of the boat underway.

    Nothing we do is just for the hell of it. We build with a purpose.

    The first 32XPR has gone to paint and will be on the water in a matter of a few weeks.

  20. #27
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    Sounds like someone has been doing their homework.
    The best way to predict the future is to invent it...

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  22. #28
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    How'd everyone's hard work turn out? :-)
    Wriggleys gum makes me think of boating, "Double your engines, Double your fun"



  23. #29
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    The boat is very fast. I will let Dustin and or Chris disclose the numbers that its running but they are very very good.

    Joe

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  25. #30
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    Good to hear Joe!

    waiting for them to post some info and pics


    these pics were asof April 21

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