Blackjack hardware upgrade

[obrien]

The battery trays will come out with a pair of plyers. you just have to be careful when you remove them

[zero9046]

thanks for both replies. when i received the fullers' hardware i was surprised because i didn't expect it to be set so far back. why did fuller do that? thanks for the tips again!

[treystoys]

I think the concensus with the set back for the rudder is for a better pivot point when turning, especially both ways like in the offshore classes. By pivot point, I mean if you have a rudder mounted directly to the transom, there is less leverage to swing the hull around where as with the rudder 4-6 inches behind the hull, it has a higher amount of leverage...kind of like breaking a rusty bolt either with a standard length ratchet and socket, or a breaker bar...which one wins...the longer one. As far as the prop being further back, its another matter of leverage, that one for holding the boat in the water while still running a far back CG...in other words, you can more easily air the hull out with less worry of a blow over...just think of the prop way back there as the rear most running surface of the hull...its not actually, but it serves the same purpose.

Good luck with it and hopefully I didn't confuse more than help!

Trey

[zero9046]

no, that makes a lot of sense. thank you very much! i've become very familiar with monohulls over the last year or so, and now that i have broken my goal of faster than 40mph on my supervee, its time to start tinkering with the blackjack and leave the sv for racing.

[zero9046]

This is the result of raising the prop strut above the bottom of the sponsons. To me the u-shaped bend in the shaft looks kind of silly, although it causes no binding or anything. I suppose given the position of the mounting holes in the transom it might be better to go with a set up where the prop is closer to the transom? What kind of affect on speed is this going to have on the boat?

[treystoys]

Is there any way you can shoot another pic of the boat sitting on a table with the strut on the table as well...it looks above the bottom of the hull, but also looks to have some negative angle it it too. Just a thought...if you could take a picture with the boat sitting like described, and with the camera level with the table surface.

ttyl

Trey

[obrien]

I would have to think that with the extra bends in the shaft, you would have to be losing some power. but has to how much that is hard to tell. You might try putting more angle up on the prop just to see what that does.

[zero9046]

more up angle without actually elevating the entire strut?

[obrien]

yes. basically you can eithe drop the front of the strut, or raise the back

[zero9046]

just got my hands on a pair of barracuda 80 amp ESC's modded with water cooling for a really good price.

if i still use the stock motor on this boat, what kind of prop set ups do you think i can get away with.

also, if anyone has a supervee as well, mine has an ammo 2300kv motor, what kind of props can i throw on it with 12 or 14 cells and a barracuda 80?

[zero9046]

latest update. went to the pond today and was further disappointed. had to throw in 14 cells to get 34.8 mph. i tried the strut in all different number of places, and the speed seemed to pick up the most with the strut lowered and pointing up a bit. still disappointed with the speed... so, since i had a spare SV motor laying around, i installed it (with much trouble) and we'll see what happens tomorrow when i head back out to the pond.

[zero9046]

no one? no ideas on the fiego motors?

[obrien]

I haven't tried a fiegao motor yet.