Another Catamaran Build!

[mbartley27]

Keep the pickups they will work just fine. Just make sure they are in the water flow so they function. I could not tell from the pics but they look a little shallow.

Thanks.... I do agree that they are a bit shallow, but when I put it in the water I`ll adjust them accordingly. like I said, I`m a newbie, so any input is very much appreciated..

[forescott]

Lookin good! I think the turnigy 120 would be more than adequate for your motor/battery combo. The 180 is nice, but you could save about 30-bucks with the 120.

[sailr]

Start with an X442 and work up!

[Tommy Gun]

like the build this hull looks exactly like the hpr's

[Fluid]

...I think the turnigy 120 would be more than adequate for your motor/battery combo...

You'd be surprised how many amps you can draw with that motor. It can give spikes well over what the 120 model is rated to take. While the x642 is probably safe, you know how it goes - the owner has to keep going up in prop size to get that extra speed and pretty soon he's running an x560 and pulling 140 amps. I'm always a proponent of using a bit more ESC than you think you'll need, that helps to reduce the chance of burn downs.




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[mbartley27]

like the build this hull looks exactly like the hpr's

Thanks... I've been watching your build as well.. Awesome. HUGE hull!! Can't wait to see it run..

[785boats]

Got mine to 51mph with an X440/3 blade on the 8Xlmotor.

[FighterCat57]

Interesting build!

I don't understand the dual water pickups, but they look cool. I run everything off of the rudder pickup and into a Y connector and have been pleased with the results. There is a good amount of water pressure to tap in to. Careful of the drag created by the transom pick ups. I know some were having problems with symmetry and handling due to placement and depth of the pickups.

I've been running an x440 (2.19") on 3s2p in a CC/Neu 2650 Kv powered Apparition (same hull bottom- same RPM as your setup) in the 43-45mph range. Headed to an x442 (2.31") next. The 642 (2.64") might be too much as I have amp draw issues with the x445 (2.47"), although you might get away with it running lower KV and higher V.

Hope that made sense and hope that helps.

[mbartley27]

Interesting build!

I don't understand the dual water pickups, but they look cool. I run everything off of the rudder pickup and into a Y connector and have been pleased with the results. There is a good amount of water pressure to tap in to. Careful of the drag created by the transom pick ups. I know some were having problems with symmetry and handling due to placement and depth of the pickups.

I've been running an x440 (2.19") on 3s2p in a CC/Neu 2650 Kv powered Apparition (same hull bottom- same RPM as your setup) in the 43-45mph range. Headed to an x442 (2.31") next. The 642 (2.64") might be too much as I have amp draw issues with the x445 (2.47"), although you might get away with it running lower KV and higher V.

Hope that made sense and hope that helps.

I wanted to do this type of water pickup because I wanted to do something different/drastic....Never been done before...From the time I put on those water pickups, I was a tiny bit concerned about drag, but I don`t think it`ll be that bad.. All this talk about props is educating me alot... Thanks!!!

[mbartley27]

You'd be surprised how many amps you can draw with that motor. It can give spikes well over what the 120 model is rated to take. While the x642 is probably safe, you know how it goes - the owner has to keep going up in prop size to get that extra speed and pretty soon he's running an x560 and pulling 140 amps. I'm always a proponent of using a bit more ESC than you think you'll need, that helps to reduce the chance of burn downs.




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You do have a good point.... and I just may buy them both to see what the diff will be.. I'm leaning towards getting the Turnigy 180A.

[FighterCat57]

The Turnigy 180a is a tight fit, but can be done. It has a large footprint. The hull you have has a little more room between the motor and the hatch nose. The wires do hit the hatch though. That's with the ESC flat on the hull, using a thin layer of silicone to hold it in place.

[mbartley27]

The Turnigy 180a is a tight fit, but can be done. It has a large footprint. The hull you have has a little more room between the motor and the hatch nose. The wires do hit the hatch though. That's with the ESC flat on the hull, using a thin layer of silicone to hold it in place.

Wow... looks like a real tight fit there.. Hmmmm.. I really would like to use that ESC, so I`ll make it work.. Thanks for the photo...Great Help.

[mbartley27]

Hey, I just have a quick question. Seeing that I put a 3/16" shim on my 4mm prop shaft to fit a bigger prop, Should I get a 3/16" Drive dog as well and use a shim, or should I keep the one I have?

[FighterCat57]

AFAIK- keep the same size dog as the shaft.

[Karfrik]

Hey, I just have a quick question. Seeing that I put a 3/16" shim on my 4mm prop shaft to fit a bigger prop, Should I get a 3/16" Drive dog as well and use a shim, or should I keep the one I have?

As Fightercat says,you need to keep the same 1/8 drive dog so it fit tight on the shaft.If you put a shim below a 3/16 drivedog to make it fit on a 1/8th shaft,it won`t tight fit on it,its gonna spin around.............also make sure you flat spot at the motor and prop shaft in order for everything to get a tight fit!!!!.............Al