17" Hydro Looking for recommendations

[monojeff]

I am getting this hull from hydrojerry & will need to get all new hardware & motor for it.
It's a 17" ABS hull

Need recommendations on running 2s higher Kv or 3s Lower Kv motors.
I'd like to keep the costs down on this as it is just something to play with.

Figured I could run hobbywing 35amp esc
Motor TBD possibly 4800kv (http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8595)
Strut Micro (http://www.offshoreelectrics.com/proddetail.php?prod=ose-80046)
Rudder Micro (http://www.offshoreelectrics.com/proddetail.php?prod=ose-80048)
Or was thinking maybe a 21 size rudder might be better? A little more length??
Mini Servo
Props TBD on motor choice


Tips Advice greatly appreciated!!
This is my first electric build other then my 1/10 scale thunderboat which I am in the process of scratch building.

[monojeff]

No on with any input on this boat?
Thoughts on the setup I posted??

[madgadget]

:cool:I've had good luck with the hk motors in 450 size heli's and just ordered 3 more to play with in my mini hydros.
http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6261
http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6387

This esc has worked for me and I proved it was waterproof as well.
http://www.hobbypartz.com/07e-c-seaking-35a.html
I have one in my 17.5 hydro and ordered 3 more. Someone more experienced than me will have to help you with running hardware. I make my own or make guessestimates. Go big and trim it down till it works. Best of luck to ya

[ENCORE MAN]

I have some Minicat hydro parts, strut ,rudder, flex shaft etc, I will dig them out and get back to you. If you use these parts, you can always get spares from Sailr.

[monojeff]

I have some Minicat hydro parts, strut ,rudder, flex shaft etc, I will dig them out and get back to you. If you use these parts, you can always get spares from Sailr.

Appreciate it keep me posted! :thumbup:

[monojeff]

I think I am going to go with a 12 size rudder just for a little more length.
http://www.offshoreelectrics.com/proddetail.php?prod=ose-80051

Most likely will need a new standoff to bring it closer to the transom.

[monojeff]

I am also debating going with this motor option instead.
3000kv motor http://www.hobbypartz.com/88e-ads-300l-watercool-motor.html

[BakedMopar]

I used to run a 17" hydro with a Feigao 380 8l on 3s.

o1ukQcK5ud8

[monojeff]

[QUOTE=BakedMopar;295890]I used to run a 17" hydro with a Feigao 380 8l on 3s.
/QUOTE]

I have seen this video boat seemed to run very well!

I am thinking the 3000kv motor should give me a little more to work with.
Also reading that the 4800 motor shaft tends to bend easily.

I am trying to keep my costs down as much as possible on this build so every little bit counts.

[monojeff]

Thinking one of these motors will be a good choice possibly instead of the others
3500kv outrunner
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11178
4400kv outrunner
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11177

I would obviously need to jump the esc up to the 60amp
ot I could even go up to the 90amp esc
http://www.hobbypartz.com/07e-c-seaking-90a.html

Thoughts??

[monojeff]

:cool:I've had good luck with the hk motors in 450 size heli's and just ordered 3 more to play with in my mini hydros.
http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6261
http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=6387

This esc has worked for me and I proved it was waterproof as well.
http://www.hobbypartz.com/07e-c-seaking-35a.html
I have one in my 17.5 hydro and ordered 3 more. Someone more experienced than me will have to help you with running hardware. I make my own or make guessestimates. Go big and trim it down till it works. Best of luck to ya

Do you have any videos on this setup?
What boats are you running & what are your temps like?

[monojeff]

Striped the paint off & started sanding & filling the hull for it's new paint job.
Lots more work till I get it smoothed out!!

[HYDROJERRY]

Many layers of paint there huuu,, the first coat cracked and i didnt no what to do so i tryed everything i could think of,,sorry for the extra work bro...

[monojeff]

Many layers of paint there huuu,, the first coat cracked and i didnt no what to do so i tryed everything i could think of,,sorry for the extra work bro...

NO WORRIES you HOOKED ME UP!!!! :thumbup:
Nothing a like a little elbow grease.
I'll get it all smoothed out.

I could have taken it down further but figured the primer seemed to stick pretty good so just smooth it out from there.
I'm not sure if I will strip the bottom paint or not, was thinking I will just light sand and give it a coat or two.

[RandyatBBY]

:popcorn2:

[CHUD]

:popcorn2: Love that hydro jeff ,I all most got me one of the 450 heli motors from HK for the mini long light ,good luck on the build bud :popcorn2:

[monojeff]

:popcorn2: Love that hydro jeff ,I all most got me one of the 450 heli motors from HK for the mini long light ,good luck on the build bud :popcorn2:

Yeah it's a cool little boat.
I think I figured out that I am going to go with the new water cooled 3000kv outrunner
& a 35amp esc.

At the moment I am working on my 1/10 scale so all funds going towards that build.

[monojeff]

Haven't given up on this build just been busy with work and trying to figure out what motor and esc combo I want to go with.

I am now leaning towards a tacon 2040 motor, it is a bit cheaper and smaller then the outrunner and I have seen others using it in similar sized hulls with good success.

Here is some pics of the boat top deck primed and bottom of boat before getting fresh coat of white.

[CHUD]

I have a 20/40 that hydro gave me jeff you can have it if you want it. on 1.5s 3cell she just got to hot its not water cooled,but you can try a 2cell ,my boat was just to big ,I got a 2835 380s 2700 and she fly's ,just send me your add and I'll drop it in the mail tommorrow:Peace_Sign:

[CaptPJB]

Can someone tell me if you can run one of the HK Heli 450 out runners without water cooling in a mini if you did not get too wild with the prop?

Similar to thishttp://www.hobbyking.com/hobbyking/s...dProduct=11178

[monojeff]

Can someone tell me if you can run one of the HK Heli 450 out runners without water cooling in a mini if you did not get too wild with the prop?

Similar to thishttp://www.hobbyking.com/hobbyking/s...dProduct=11178

Link didn't work
I know properchopper has a motor in the for sales on here for a mini.

[monojeff]

I have a 20/40 that hydro gave me jeff you can have it if you want it. on 1.5s 3cell she just got to hot its not water cooled,but you can try a 2cell ,my boat was just to big ,I got a 2835 380s 2700 and she fly's ,just send me your add and I'll drop it in the mail tommorrow:Peace_Sign:

I think that's the same one he had in this boat when he was running it.
I guess it's worth a try.
Thanks I will PM you.

[CHUD]

jeff sending the motor tommorrow, But look at the for sale thread mini motor's that blackcat26 has ,the same as mine but 3900kv for a good price:Peace_Sign:

[monojeff]

Thanks for the heads up but I can't be spending $$ on anything at the moment, I still have a bunch of stuff I need to buy for my 1/10 scale.

[HYDROJERRY]

Jeff that motor chud has was the one that was in that hull but got very hot!!! it was on a 3s 1500 lipo, 35a turnigy marine esc and a 427 prop,, i was told to try running it on a 2s lipo and mabe a 430 prop but i never got that far but for free try it maybe you can find a sweet spot in the setup and keep it cool....:cool2:

[monojeff]

Jeff that motor chud has was the one that was in that hull but got very hot!!! it was on a 3s 1500 lipo, 35a turnigy marine esc and a 427 prop,, i was told to try running it on a 2s lipo and mabe a 430 prop but i never got that far but for free try it maybe you can find a sweet spot in the setup and keep it cool....:cool2:

Yeah I remembered that from your pics and us talking before.
I figured the same thing why not try it out and see what happens.
I have a bunch of small props I can try out.

Did the coils help in cooling it at all you think?
Also what kv was it again 3600???

[HYDROJERRY]

Think the kv was 4600 or 4800 cant remember for sure,,and i dont think the cooling tube realy helped being the motor has fins..

[monojeff]

Think the kv was 4600 or 4800 cant remember for sure,,and i dont think the cooling tube realy helped being the motor has fins..

Looks sorta like this motor http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=3850

Where did you get it from do you remember??
No big deal if not.


I look forward to testing it out. :banana:

[monojeff]

THANKS CHUD really appreciate you sending it to me!! :thumbup:
I owe you one keep me posted when your ready for the decals on your Fightercat!!

[CHUD]

THANKS CHUD really appreciate you sending it to me!! :thumbup:
I owe you one keep me posted when your ready for the decals on your Fightercat!!

No worry's jeff ,you don't owe me anything,H/j gave it to me ,I give it to you,:hug1:

[HYDROJERRY]

Looks sorta like this motor http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=3850

Where did you get it from do you remember??
No big deal if not.


I look forward to testing it out. :banana:

jeff it came with the boat when i bault it like 2yrs ago..

[monojeff]

OK thanks

I guess I should finish painting it and get some hardware and test it out....

[monojeff]

Got the motor today THANKS GUYS!!! :hug1:

[monojeff]

Well I was starting to paint the hull and the boat fell and cracked the seams open in a bunch of spots.:crying:

I sanded down the seams and applied some fiberglass to all of them so this should make the boat stronger then it was so this doesn't happen again.

Once I am done I can finish painting the hull.
I still need to get a rudder, battery, strut & drive setup.

[monojeff]

Here is a picture of the boat with new paint job and some decals.

Only things I need now are flex cable and stub shaft and some batteries to get this going.

I plan to do some modification to the transom so make mounting the hardware flatter.
At the moment there is a step right in the middle which makes it weird to mount things so I plan to glue a piece of ply to flatten it out.
I also plan to add some wood to the back of the cowl so it is easier to tape at the moment there is no way to make it waterproof.


In the pics you can see where I added fiberglass on the sides where the seam is to strengthen the joint.
I could probably have done a better job on this part but oh well it's better then CA and opening back up again.
It is rock solid now, not worried about it popping open at the seams anymore.
I didn't care to spend the anymore time to make it perfectly smooth I gave it the "it's good enough".

[tim v]

very nice... what kind of boat is it?

[monojeff]

It's a 17" ABS hull not sure on the make of it.

[HYDROJERRY]

Looks good Jeff,,,

[monojeff]

Ok guys got the rest of the parts to get this boat in the water.

Need to know what prop I should use.
I have a bunch of plastic x and y series 27, 31mm & 34mm
Also have a metal x427 Jerry do you remember if this prop was balanced??
I also have a 30mm glass prop.

The motor I'm using is a 4000kv taxass 380 on 3s.
The battery I'll be using is 1500mah any idea on run time to expect??

[HYDROJERRY]

I cant remember for sure if i B/S it or not and if i did its probly not perfect!!! you may want to check it to be sure Jeff,,

[monojeff]

Sounds good I'll be sure to do that.
Do you remember what prop you were running with this motor in your mini geico?

[monojeff]

Here is some video I took of the first time running the boat.
Def is a handful at full throttle!
I lost the flext shaft and prop due to not tightening the collet enough you can hear it at the end of the video sounds like someone screaming OOPS!
I really like the way the boat sounds when it's running well suited for the name "Killer Bee"


http://www.youtube.com/watch?v=iH36gnp_Mzs

[HYDROJERRY]

Wich motor did you use?? looks sweet and looks like its runing good too..nice job Jeff.

[CHUD]

Sounds like its ripin up the water,I love it:buttrock:

[monojeff]

It's the traxxas motor.
Still needs some adjusting as the water pickup wasn't working.
Was just trying to get the hang of how it would handle.
I think it could use a stronger and faster servo as it's only a T9 and responds slow so gotta be careful on the turns but straight line in pretty fun with it. Can't wait to get it fully dialed little boat def rips.

[HYDROJERRY]

yeah that traxxas motor screams,,

[monojeff]

Specially on 3s.
Gets hot though so need to make sure cooling is working good.
Was way to hot last time an def don't want to burn it up.
I'm planning to start on a mini sprint over the winter and probably power it with this motor.