Project 41" Sprintcat!

[FighterCat57]

It's amazing sometimes what one can do on a whim. I was going to buy another hull setup completely. So just found a smaller one more suited for the CC/Neu setup and bigger electronics for this guy. =)

[FighterCat57]

Sounds perfect. I haven't finalized the drives, just the rudder, so may upgrade from what I was planning on using with the CC/Neu setup. The little screamers are just a bit more powerful I presume.

So I guess we'll see what Jeff has to recommend as this is the biggest setup I've done yet.

Yep, gotta go bigger on the struts... for that kind of power. Time to shop around. I don't have anything else that large to standardize from.

[FighterCat57]

Or one sceramer on 14s two would be overkill kill @20kw.alot of weight too. I think we sometimes forget about hp to weight ratio.Im sure a lighter twin setup will give u less stress if i was going the scorpion route id go 4035 800's @9kw thats plenty but here again what are your battery requirements . People would tell you no ;but I had one 17xl kb45 700 loved this boat and thought many times of buying another kb and running twins in your exact boat. They cost 40.00 . Some on here have had bad experiences and some have had really good.Now some that had bad had wrong setups too. I asked all the questions to find out.Now the one I had pushed my 43 inch 12.5 lb circus hull between 30-35 on 9s on 9s! No water cooling 1p. Now anyone with sense should be able to estimate 2 on 12 s come on. They can push a 450 @ 12s under 150 amps so keep hatin on the kb if you want.They complain about heat,high current draw,bad balancing I experienced none of the above; but look at the physical construction of the motors like the feigao and kb compared to say a pletti,neu,or lehner. Forget even trying to go deep; lets just stay basic. The cans on the chinese motors have no cooling vents .Add some.The wires on the chinese motors are typically longer and smaller.If you cant replace them with bigger (on some inrunners that might be challenging;outrunners not so much) cut them shorter and add better connectors.As far as the balance the new kb's come with high quality american, yes american bearings.If that were a problem;change the bearings. Lastly youre gonna water cool it ,you can fan cool it,and you can peltier cool it. Its all hype to me dawg You wont even need all that crap.Lastly if they pull alot of usable amps with a kv of 700 they should be torque monsters.Oh let me add the esc was a turnigy 80 hv buth think about it its rate 180 10 second amp burst 10 full seconds count it out thats a good bit of time. If you pull more than probably 120-130 amps continuous on the kb its probably over-propped.To keep from burning you truly need data logging on anything.

So you're sayin 1 screamer is overkill... Hmmm. I guess two is over killed over?

Really, is two screamers w/batteries too much weight for this hull? Cells weigh in at just under 4000 grams. They are big.

How do I determine the weight capacity for a hull?

Mmmm. Questions.

[Rumdog]

if it floats, it's fine

[FighterCat57]

if it floats, it's fine

Ah. Logic!

[Brod]

Got to remember,these hulls were originally designed for gas single motors.
The motor,pipe and full 500cc fuel tank etc would probably weigh about 2700g.
I would be wary of going alot heavier with FE power in case of stability/performace differances at speed.
with a modded gas motor 65mph would be acheived quite easily.
But unless its done and tried,dont really know what would happen.

[FighterCat57]

Figured gassers would weigh more. There's still another 2000 grams for the motors and another 600 for the ESC's... plus stuff...

Lipos are heavy!

[FighterCat57]

Maybe I should get a bigger hull?

[Brod]

If it was my hull,i would run one motor on 10S,it wouldnt be too heavy then and still be very quick.
Seem to remember a guy running a scorpion motor in a similar hull?? and it was very succesful.

[FighterCat57]

If it was my hull,i would run one motor on 10S,it wouldnt be too heavy then and still be very quick.
Seem to remember a guy running a scorpion motor in a similar hull?? and it was very succesful.

Hey, then I could get another hull and build two of them!

I guess it isn't such a bad idea to try to run a single and if it doesn't work out well, then go to double?

I'm still stuck on the twin cats though...

So many ideas! Wonder exactly how this will turn out now!

[Brod]

Been there done that,classic case of too many boats lol..

[FighterCat57]

Yeah, it's all going to good use somehow. Just a question of how and when. =)

[forescott]

Maybe I should skip it on this idea all together and go back to using the CC/Neu motor combination and put the twin screamers in my 57" Fighter Cat.

Thats what I was thinkin!! Do it!!

[FighterCat57]

Thats what I was thinkin!! Do it!!

Really, I'm not in any hurry to determine what to put in it. I've managed to thoroughly confuse myself by buying some new electronics on a whim though.

There's many ways I can go with this boat right now. If I can't figure it out in the next few days, I'll setup a forum poll and let the boating audience decide...

Basically, I'm deciding how to paint it first, then I'll decide how to power it.

Black, Blue, Red, Silver and White are my colors. Might not use any red though.

[FighterCat57]

Some photos of the bare hull, top and side. Time to think about how to lay it out.