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-   -   Center of gravity? (https://www.offshoreonly.com/forums/general-q/377084-center-gravity.html)

Twin O/B Sonic 09-19-2022 08:07 PM

Makes great sense and thought that must be part of it.




Originally Posted by Unlimited jd (Post 4845509)
brings the rotational mass closer to the centerline of the boat and lower, the propulsion closer to the center, and as you know my drive prop shaft is 1.5” above the bottom. (1” with the spacers installed) If we did nothing but move the drives out 4” on the same horizontal plane, they would be at least 1” below the bottom in that relative line.


Keith Atlanta 09-19-2022 09:17 PM


Originally Posted by hogie roll (Post 4845261)

All the steps are doing at that point are packing air! LOL

Twin O/B Sonic 09-20-2022 05:27 AM

That thing is singin!


Originally Posted by Keith Atlanta (Post 4845518)
All the steps are doing at that point are packing air! LOL


Brad Christy 09-20-2022 07:26 AM


Originally Posted by dvr4hire (Post 4845498)
For my experiences in the bilge, the best reason for staggered setup is the relative ease of serviceability!!

Drv4hire,

That can't be an unwelcome bonus. I can't imagine changing the plugs in a side-by-side twin set-up.

Thanks. Brad.
(937)545-8991

Brad Christy 09-20-2022 07:36 AM


Originally Posted by Keith Atlanta (Post 4845518)
All the steps are doing at that point are packing air! LOL

Keith,

The steps did their job at a much lower speed, allowing for higher pitch props when the hull was seeing a lot more wetted surface.

Thanks. Brad.
(937)545-8991

outonsafari 09-20-2022 08:23 AM

Look up "ben perfected" i think cg is approx 35% forward of the transom. They had the boat fully fueled, both drivers and picked it up on 1 sling at lake x to determine that.
ben perfected is a 30 panther B class boat that holds a world record of 104, haven't seen sprague on here in a long while.

alot of info on how it was set up with the how and why's.

hogie roll 09-20-2022 08:24 AM


Originally Posted by Twin O/B Sonic (Post 4845510)
Makes great sense and thought that must be part of it.

I think it makes the boats rotational inertia along the length greater. This should prevent the boat from making big attitude changes when hitting waves (it will stay flatter)

hogie roll 09-20-2022 08:29 AM


Originally Posted by outonsafari (Post 4845542)
Look up "ben perfected" i think cg is approx 35% forward of the transom. They had the boat fully fueled, both drivers and picked it up on 1 sling at lake x to determine that.
ben perfected is a 30 panther B class boat that holds a world record of 104, haven't seen sprague on here in a long while.

alot of info on how it was set up with the how and why's.

i was thinking you could put hard plastic sliders on your trailer bunks, then take one set of wheels off your trailer, load the boat back on the trailer. On flat ground slowly winch it forward until it “breaks over” and is balanced on one axle.

outonsafari 09-20-2022 08:33 AM

https://www.offshoreonly.com/forums/...b-panther.html

https://www.offshoreonly.com/forums/...t-panther.html

you'll have to dig but there is a thread on the set up and why

Twin O/B Sonic 09-20-2022 08:52 AM

PERFECT!

Finally the info icee been looking for.

Thank you sir!

Now I have some reading to do :-)



Originally Posted by outonsafari (Post 4845542)
Look up "ben perfected" i think cg is approx 35% forward of the transom. They had the boat fully fueled, both drivers and picked it up on 1 sling at lake x to determine that.
ben perfected is a 30 panther B class boat that holds a world record of 104, haven't seen sprague on here in a long while.

alot of info on how it was set up with the how and why's.



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