The Black Pearl P Sport Hydro 2017

[donthavta]

The 620 doesn't count this years

[donthavta]

Well, I have now read the 256 posts for 2017 ! have taken lots of notes . Have dry fit my 5.7...ride pads all 5mm , stick built nose with 1 inch Will use foam for round glassed (Thanks to Terry ) .does the Air dam work ? looks like 1/4 stock ,is one side longer then the other ?

[Shooter]

Air dam? Are you talking about the AOA adjustment in post #211? Yes, it works, but I don't think it's necessary. John Gross has that boat now. It runs very well.

[donthavta]

Yes ,thanks ....my build will start late this week. Ron

[detox]

Agreed. Putting a bunch of weight in the back and counterbalancing it with weight up front just makes a see-saw. The boat will porpoise badly!

Strut is adjusted too deep causing front sponsons to ride without angle (too wet). This can also happen to a lighter weight hull if strut is set too deep.

[Moonie]

Pete
I got mine running at 70 with NO added weight.

Larry

What prop you use to do that like a 47 or 50?

[T.S.Davis]

Well yeah but it's all over the place. In fairness though, that's probably Larry's fault.

[CraigP]

Strut is adjusted too deep causing front sponsons to ride without angle (too wet). This can also happen to a lighter weight hull if strut is set too deep.

Too much rake in the prop, especially on light hulls, can also cause these symptoms.

[TRUCKPULL]

What prop you use to do that like a 47 or 50?

Antonio

The hull that runs 70mph is one of the old 5.7 kits
This build and hull is a lot heaver then the new light weight kits.
It also has some of my own mods built in.

It is a full "P" setup
NEU 1515 - 1Y - 2200KV
Two 4S - 5000's 65-130C
Castle Hydra 240amp
Timing set to 15 Degrees
ABC - 1815 -17 -45

Build thread:
https://forums.offshoreelectrics.com...10-Black-pearl

Pictures
https://forums.offshoreelectrics.com...p?albumid=1364

I have since changed the turn fin, to make the hull more steady and run true without pulling to the right.
Also had to replace my drive tube, due to a dent in it that I did not notice, - lost two shafts at the last race.

Larry

[CraigP]

Larry, what are the pertinent restrictions for P Sport? I have a 2310kv TP motor and two batts like yours.

[photohoward1]

No restrictions for motor in P Sport. Spec is 36x60 mm


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[T.S.Davis]

2310 is pretty hot. Which motor is that? 4070? It could work with a small prop. The 1515 runs warm too at 2200kv.

For me, I prefer a few less kv with more blade in the water but results vary depending on which boat you're running. Some boats don't like a big blade. The Pearls do pretty well on 45mm props. A 45mm on a TP2310 will likely come in hot on the oval. Zip zip playing around it will work fine though.

[CraigP]

It’s a 4050 TPP motor. Heavy hull, about 10.5#, so I figured a bit more motor bog... Yes, M445 is the best prop. And you are right, it is very hot heading into the corners! I have to back off throttle at same time I slam the rudder right. Scrubs off some speed by the apex, then more slowly straighten out while feeding back to full throttle. It’s a handful... I’m waiting on a mixer to install in the boat to handle that rudder/throttle ballet dance. Hopefully I’ll be able to put more attention to the track.

I haven’t even tried turning full throttle, just feels like a suicide mission, lol!

Oh, Boat does not like big prop/lower kv setup.... It will start to porpoise if I hit any rough water. Little prop/high kv and the boat just hops up, flies level, then sets back down.

[CraigP]

No restrictions for motor in P Sport. Spec is 36x60 mm


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That’s a small motor! So folks need a very light hull in Spec with that small motor? I got a 3674 in my DF29 Mono...

[T.S.Davis]

Usually those boat are light. There are tons of options though for motors.