COG Help

[Jlov]

Can someone tell me how to check the center of gravity on my Daytona hull. My build is nearly complete and someone suggested my motors may be to far forward and that my COG may be off. Thx Jeff

[ls1fst98]

you want it to be roughly 30% of the length from bow to the end of the ride pad at the stern. not length over all. take a round dowel and set the boat on it and put all your running gear as it would ride including hatch and see how it balances.

[nate]

I agree, your motor's need to go back from where you had them setting 3" and run a longer set of battery trays, that way you have more room to work your weight back and fourth.

[ls1fst98]

yes you should always try to set the motor as far back as possible. make all the fixed stuff as far back as you can within reason and use batts to adjust cog. pic of where your motors are?

[Jlov]

Yes found old thread on how to find COG. I have two 5300 4s packs in hatch on and COG is at 37%. But that was based on full 37" hull measurement. If I measure it from tip of sponson to end of ride pad where stingers mount up then COG comes out to 30%. So am I ok? Thx Jeff

Here ya go
image.jpgimage.jpg
image.jpg

[ls1fst98]

sounds like you should be good. they do look far forward but if its at 30% then i dont see a need to move anything.

[Jlov]

Guess when flex shafts come in and I do first test runs I will know for sure. So if COG is too far forward the boat will run wet and nose will be down I assume? Thx Jeff

[nate]

Yes, I ran too much weight up front in my twin MM hull, and it had cavitation problems, sluggish in corner's, and very slow.

[Jlov]

I'm sure adding weight to boats is a no no but I'm not racing. I just run these out on my boat for fun. I think if COG does end up being off a little I will just counter it with some lead weights in rear rather then have to go all through removing epoxy and mounts. Or is that really not a good idea?

[Luck as a Constant]

Adding weights is def not a no no. I've done it with success


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