OP
Blacktip Scooter- Limited To Weighting, Buoyancy and Trim
- Thread starter RayfromTX
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Neither of the weight plates in it? Or just no thick plate?
Is your compass slightly negative, or slightly positive?
It only (apparently) takes 9.3oz of weight to take it from neutral in fresh to neutral in salt. So, maybe your extra bolt snap (compared to mine) and your compass give it that much extra weight?
OP
Compass is slightly negative in fresh and slightly positive in salt. No plates installed at all. The bolt snaps are 1.8 ounces out of the water. I haven't dived it in fresh water but expect it to be negative.
Well, that was easy enough.
Those weights are marked at 7oz each and they are astonishingly (to me) accurate! The thin plate clocked 109g by itself.
View attachment 585131
Doh! 7grams each! Not 7oz.
Jack Hammer
Contributor
Are people finding the published weight of 13.2kg for fresh water accurate for fresh water?
My blacktip tech dpv had the following components weights from the factory:
Lid (w/ added tow leash): 1559g
2x 3/16" nose weight plates: 558g and 559g
Salt water plate: 235g
Dewalt 9ah batteries weighed: 1450g and 1453gr
It's assembled weight was 13.395kg without the salt water plate and it was quiet negative even without the tow leash in fresh water, I'm trying to figure out if getting it down to the published weight of 13.2kg is what is going to be pretty close to neutral in freshwater, at the end of the day I'm sure I'm just going to need to experiment with it fresh water but hoping to get it really close to minimize the time messing with it.
My blacktip tech dpv had the following components weights from the factory:
Lid (w/ added tow leash): 1559g
2x 3/16" nose weight plates: 558g and 559g
Salt water plate: 235g
Dewalt 9ah batteries weighed: 1450g and 1453gr
It's assembled weight was 13.395kg without the salt water plate and it was quiet negative even without the tow leash in fresh water, I'm trying to figure out if getting it down to the published weight of 13.2kg is what is going to be pretty close to neutral in freshwater, at the end of the day I'm sure I'm just going to need to experiment with it fresh water but hoping to get it really close to minimize the time messing with it.
I suspect that that is a blanket statement that may not work for everybody. They don't put those in there for absolutely zero reason.
If his assembled weight is 13.395kg with both nose weight plates installed, he should probably start by just taking one of those out and adding lead shot (or BBs - what I used) to make the nose 2620 to get to his fresh water starting point.
Production variations in the density of the body tubes means there is not an absolute number for weight to have in the scooter that is going to be correct for everyone. Experimentation is required (and a pain in the butt). But, once the weight is dialed in so you have it neutral, in trim, and floating with the handle where you want it, it IS pretty sweet.
And, let's not forget that if you tweak it to dial it in in a pool (like I did), you're still going to probably need just a bit more tweaking after you take it to depth and see how much buoyancy you lose due to O-ring compression.
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