Black Pearl II Hydro - 2020

[ray schrauwen]

I've got all the faces sanded now. Now comes the dirty little slots. I think I'll try doing those while watching a movie later on. The glue in the picture is not necessarily what I'm going to use to build the boat since it's a lot thicker than I anticipated it would be. It's designed for hardwood gluing applications and for making wood airplane parts real airplanes not toys. I also have some West systems here and slow and medium speed hardener it looks like I'm going to go for the West systems to do most of this boat. I still have to get some of that reading done I'm sure there's lots of important stuff in there.

Now I know how not to take a picture on my cellphone, lol.

[longballlumber]

Here you go..

There is no reason you can?t use the Systems Three T-88 epoxy. From what I read quickly it?s effectively 60mm epoxy. It will take overnight to fully cure. Much like the WestSystems you have. I would say the biggest difference between the two would be the viscosity and the gel times. The thinner WestSystems is going to penetrate better IMO. I don?t know that either help you build faster.

[ray schrauwen]

Cool. I'm going to use it where fillets are needed and gap filling. My grid paper I tested to see if glue sticks was a fail. I need to cover that surface with parchment.

[TRUCKPULL]

Drive Angle

I have a question for Sport Hydro builders.
On my Black Pearl.
I have found that with the speed we are achieving with the rudder and turn fin set straight in line, that you have to adjust the strut to get the boat to run in a straight line. With the strut straight the boat wants to turn into the course.

As of right now I am using a 1.5 degree wedge between the transom and the strut mount.

Seeing that 1 degree is .210" per foot.
From the rear of the strut to the back edge of the ride pads is 18.5 inches.
So my drive force is at 31/64 inches off center. (or 1/2 off center)
at the rear of the sponsons.

If I was to move my strut sideways off center to mount it square to the transom.
How much would I have to move it?

Larry

[Shooter]

Gee Larry, that's a good question. I'm with you at 31/64". 18.5*tan1.5 = 0.48 = 31/64". Question is if that is the number you need to offset.

[TRUCKPULL]

Gee Larry, that's a good question. I'm with you at 31/64". 18.5*tan1.5 = 0.48 = 31/64". Question is if that is the number you need to offset.

I am thinking that the angled thrust is a lesser forward force then 90 degrees is?

I was also hoping some of the Rigger SAW guys may answer this.

Larry

[Shooter]

Yes, the saw guys should know. I think in both cases you are losing some FWD thrust because it is creating a moment about the CG causing the boat to want to rotate. Propwalk does this as well.

[TRUCKPULL]

Yes, the saw guys should know. I think in both cases you are losing some FWD thrust because it is creating a moment about the CG causing the boat to want to rotate. Propwalk does this as well.

Pete
I am using an ABC 1815. Less lift, and walk, but the same dia. and pitch as your H5 prop.

Here are two pictures of the carbon fiber wedges that I make.
These were made from 1/16" plate, a little thin,
I will be making new ones from 2mm carbon fiber plate.
If anyone is interested, PM me.

Larry

[Shooter]

Started the sponsons last night.

[eric113]

Raced this past Saturday, my boat found the bottom of 8? waters. Also had a club member slice into left sponson.

[T.S.Davis]

Started the sponsons last night.

I must have a 100 of those little clamps. Pete, do you ever us a piece of flat stock of some sort and clamp that with the skin so that the surface comes out straight.....er? I do that with the shoes. Get me closer to straight....ish. Not sure why I never did it on that outer skin.

[TRUCKPULL]

Terry
Do you mean like this?


Larry

[ray schrauwen]

Am I to assume I need to buy a nose block from the hardware store since I did not see any in the box? What size?

[RandyatBBY]

Hi I started this boat early last summer when the bottom of my PLTD Sport lost the full center sheeting. I got this boat and quickly realized I did not have the time to build. After the NAMBA Nationals in October it was my goal to build this boat this winter along with three others. 2 scales and a Q Sport, this is how it looked to start
IMG-3276 (1).jpg
skin on bottom
IMG-3352.jpg
first skin on deckI use masking tape to hold while epoxy dries. I also put milled FG and caboseal to make a peanut butter consistancy to increase strenght in bond and rigidity.
IMG-3354.jpg
I changed the front of the sponsonson the bottom a little. and I am going to use a BBY cowl from the Zephyer on a plywood more later.

Sense I am retired I am enjoying building and running other peopls hulls.

[ray schrauwen]

Randy it looks like you screwed the transom down to the build board.