Black Pearl II Hydro - 2020

[ray schrauwen]

I would say - If you run an "H" prop (lifting Prop) - Round bottom.
_ If you run a non lifting prop - Flat Bottom.


Larry

If flat do you use a normal length strut or an extended one?

[ray schrauwen]

OK, back to the build. I sanded the ride pad framework flat in prep for the pads. I usually use this super long sanding block to keep both sides in check.

Is that an aluminum block or wood? Do you peel off the shelf paper from the backing with the grid pattern on it or do you just leave it on? I need to start gluing up these boats.

[TRUCKPULL]

If flat do you use a normal length strut or an extended one?

Ray you have a choice of round or flat.
https://www.offshoreelectrics.com/pr...=ros-spdss-001

Larry

[Shooter]

Hi Ray. I just leave the backing on.

[Shooter]

I also agree with Larry's assessment. If you are running a non lifting prop, flat strut.

[eric113]

Did some testing on local pond. The video starts on tail end of my run. Still running 1814 prop. I did tilt the turn fin back 1-2mm. It made it stable,predictable can hold full thottle whole time. But did scrub my speed down to 62 from 63mph. Will be racing it next Saturday.

[Shooter]

Wow Eric. You have it turning very nicely! That thing looks like a handful in the straights though. She's showing a lot of bottom. What is your RTR weight? CG?

[eric113]

Pete, my RTR weight 7.4lbs and here my CG

[Shooter]

Looks good Eric. My boat is almost an entire pound heavier!

[ray schrauwen]

He's running a small fuel tank

[eric113]

Looks good Eric. My boat is almost an entire pound heavier!

Thanks, what is making yours heavier than mine? Don?t know if you?re on facebook.. but if you are, you should join our boat club group.

He's running a small fuel tank

Don?t really need 10,000Mah. They actually been doing really good.

[Shooter]

For my 70mph heat race set-up, I'm running (2) 4S 5000's, and I add 5oz of copper at the CG. That probably amounts to most of the weight. My motor may weigh more as well. Personally, I've never been a fan of light boats for heat racing, but they are faster for sure.

[T.S.Davis]

We had 10k in the Version 11 and the boat is too heavy. It's too heavy on it's own with all the G10 in there. Ended up with 8k on board in the end. Next boat will be lighter.

I mentioned this in the other thread but I plan to do some build videos of a Pearl this winter. Hope to get started soon. I have three Pearls and a scale to do this winter. Already behind.

[ray schrauwen]

I really appreciate the advice and insight to save me some time with figuring things out. Even with this help I'm going to need a LOT of pond time and hopefully find a body of water close by to do some testing.
Thank you all.

[T.S.Davis]

I started an older v10.8 last night. I wont document that build as it's an experiment. Might be just a trials runner. I've never built a trial specific boat. Most rigger SAW boats are purpose built. Why not a sport? The question is.......how much to change it? Just go straight or roundy rounds?

The v12 I'll try to get video of every step. Down side to that is you'll have to listen to me run on about why I do what I do. Annoyingggggg. haha

Testing is good but laps are better. I know how hard it is to find pond time but actual laps with buoy............there's no substitute. We've seen some of our guys run cars all winter and then turn lap after lap on the pond. It pays dividends. Both with race results and the fun factor. You get to where you trust yourself to go the speeds you built the boat to go. Like being "in the zone". That hand/eye/muscle memory thing is a real. It's what has been missing from my racing for a couple seasons. Just not putting in the time my boats deserve.