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Unofficial "NQD" Tear into Jetboat Thread

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Old 10-27-2009, 02:02 PM
  #201
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I got mine in yesterday, and ran it today stock. The speed actually surprised me, it would have put my stock Triton to shame...sad to say. The control however was terrible, but it's made by 5 year olds so whatever. Getting ready to cut into it now!
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Old 10-27-2009, 02:37 PM
  #202
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Before I order, I just want to check and make sure, will this combo work in the boat? 2 or 3 cell LiPo?

http://cgi.ebay.com/MYSTERY-3000-Out...item3eee20e2cb
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Old 10-27-2009, 03:04 PM
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comon rockworks!!!!!! video. lol
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Old 10-27-2009, 03:18 PM
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the combo will work fine, will probably want 2s batteries as 3s will get the motor pretty darn hot, and outrunner cant be water cooled very well
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Old 10-27-2009, 03:42 PM
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Thanks for the advice Demon, I bought that setup. I can't wait to get this thing going.
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Old 10-29-2009, 02:17 PM
  #206
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Unless someone has a reason why these won't work, I think I'm going to make these my batteries to go with the 3000kv Outrunner and 30amp esc. This will keep the "cheap as hell" theme going too.

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT
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Old 10-29-2009, 03:11 PM
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whats the mounting hole distance for the motor mount in the tear into?
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Old 10-29-2009, 04:26 PM
  #208
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Quote:
ORIGINAL: goldswim5

Unless someone has a reason why these won't work, I think I'm going to make these my batteries to go with the 3000kv Outrunner and 30amp esc. This will keep the ''cheap as hell'' theme going too.

http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWAX:IT
2s lipo's at 3000 rpm's (7.4v x 3000 x 80% (losses) = 16,800 rpm's) is relatively slow. You'll want to use 3s or 4s (11.1 to 14.8v) to get into the upper 20's/lower 30's for a peppy boat. Which motor are you using?


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whats the mounting hole distance for the motor mount in the tear into?
16mm.
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Old 10-29-2009, 07:26 PM
  #209
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It's just a cheap mystery outrunner, I posted a link at the top of this page. I was thinking 7.4v per demons advice.
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Old 10-29-2009, 08:01 PM
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thanx
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Old 10-30-2009, 08:34 AM
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Quote:
ORIGINAL: goldswim5

It's just a cheap mystery outrunner, I posted a link at the top of this page. I was thinking 7.4v per demons advice.
That's a good motor. In fact, all of those heli outrunners with the 2.3mm shafts are good candidates, they're just difficult to cool properly. You can use that motor and get higher voltage batts or get a motor with a higher rpm range, but I feel 7.4 with that motor will be anemic.
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Old 10-30-2009, 10:44 AM
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I have that same motor (2700kv though) and it gets incredibly hot with no cooling on 11.1v. I went to Lowes and bought a piece of 1/8" aluminum stock and soldered some k&s brass tubing to it, I'll mount the plate between the motor and the jet unit. I'm hoping that relatively thick chunk of water cooled aluminum will be enough to cool the outrunner.

I have to second sundogz opinion on 7.4v as well. My 2700 kv running on 11.1v was quick but not as fast as I'd like, on 7.4v it would have been pretty doggy.
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Old 10-30-2009, 02:44 PM
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is this all i need and i wont have to make anything??? if i need something else please let me know and if it won't fit like the motor.

[link]http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4197&Product_Name=HXT_2445_(370L)_2900kv_Brushless_Inru nner[/link]

[link]http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=9299&Product_Name=TowerPro_H40A_Brushless_Speed_Control ler_[/link]

[link]http://206.206.85.209/xtdoc/Details.aspx?ProductCode=g-3279&store=mhzusa[/link]

[link]http://www.offshoreelectrics.com/proddetail.php?prod=dh-s3003[/link]

[link]http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8338&Product_Name=Hobby_King_2.4Ghz_4Ch_Tx_&_Rx_(Mode_2)[/link]
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Old 10-30-2009, 03:23 PM
  #214
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Save yourself some shipping and get the servo from hobbyking as well: http://www.hobbycity.com/hobbycity/s...g/3.5kg/.15sec

You'll need something to water cool that motor too... It's an inrunner, so you can just get a coil somewhere.
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Old 10-30-2009, 03:36 PM
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ok thanx

(the mounting hole distance is the same as the drive so thats good and the coupler will fit right on...

thats the kind of things im wanting so i dont have to make anything.)

and wait how do i put the servo in
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Old 10-30-2009, 03:38 PM
  #216
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Ryan, yes you'll need to cool the motor and it wouldn't hurt to cool the esc. You may need a pistix with that type transmitter. Why that motor? If you use one on the many available with a 2.3mm shaft, you won't need that coupler and probably have more power as well. You'll need to consider what voltage (battery) you want to run. If it were me, I'd go with 3s lipo's but 2s is lighter and so may perform better in a small boat (I'm testing that theory in a Jet Ski soon). A pistol type transmitter is more suitable, and good reliable FM transmitters are cheap right now on ebay (pulls from new trucks). The servo can be hot-glued right onto the hull if you want. Sdg
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Old 10-30-2009, 03:45 PM
  #217
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Ryan, I'm using the same servo that you posted. I pulled out the factory servo mount, ripped the crap servo out of it and glued it back in the hull. Then superglued the Futaba servo in the mount.
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Old 10-30-2009, 03:48 PM
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you will also need batteries and a charger.

the coupler i would wait on, mine came with a solid coupler and not a u joint so i was fine there
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Old 10-30-2009, 03:56 PM
  #219
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Quote:
ORIGINAL: sundogz

Ryan, yes you'll need to cool the motor and it wouldn't hurt to cool the esc. You may need a pistix with that type transmitter. Why that motor? If you use one on the many available with a 2.3mm shaft, you won't need that coupler and probably have more power as well. You'll need to consider what voltage (battery) you want to run. If it were me, I'd go with 3s lipo's but 2s is lighter and so may perform better in a small boat (I'm testing that theory in a Jet Ski soon). A pistol type transmitter is more suitable, and good reliable FM transmitters are cheap right now on ebay (pulls from new trucks). The servo can be hot-glued right onto the hull if you want. Sdg
i am useing that motor cuz the mounting holes in the tear into are 16mm

i am also on a budget
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Old 10-30-2009, 03:58 PM
  #220
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http://cgi.ebay.com/Walkera-180L-320...149a3ddcf#shId

those are the motors a lot of us are using (size-wize, and a bunch are that same motor). 2 of my friends and i all have that motor (ordered from that seller too)
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Old 10-30-2009, 04:03 PM
  #221
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just asking, but whats wrong with that motor?

how did you know the mounting holes were the right size on the motor you posted
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Old 10-30-2009, 04:34 PM
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Quote:
ORIGINAL: ryanwilson277

just asking, but whats wrong with that motor?

how did you know the mounting holes were the right size on the motor you posted
It's just that there are others that are faster (3200-3500kv) that already have a 2.3mm shaft. The 16mm mounting hole spacing is almost universal in this size of motor. Sdg
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Old 10-30-2009, 04:39 PM
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ohhhhhhh i thought the lower the kv the better (faster)
ok
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Old 10-30-2009, 05:38 PM
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so lets do this again. i like the remote cuz its cheap.

[link]http://www.hobbycity.com/hobbycity/store/uh_viewitem.asp?idproduct=4197[/link]

[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=9299&Product_Name=TowerPro_H40A_Brushless_Speed_Control ler_]esc[/link]

[link=http://206.206.85.209/xtdoc/Details.aspx?ProductCode=g-3279&store=mhzusa]coupler[/link]

[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=9621&Product_Name=Power_HD_Standard_Servo_43g/3.5kg/.15sec]servo[/link]

[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=8338&Product_Name=Hobby_King_2.4Ghz_4Ch_Tx_&_Rx_(Mode_2)]tx / rx[/link]

[link=http://www.offshoreelectrics.com/proddetail.php?prod=ose-80020]water jacket[/link]

[link=http://www.offshoreelectrics.com/proddetail.php?prod=ose-tubing-7%2F32-clear]tubing[/link]

[link=http://www.offshoreelectrics.com/proddetail.php?prod=aero-2010]water outlet[/link]

[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXTTS1&P=0]water pickup[/link]

and would this motor be better????

[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=4200&Product_Name=HXT_2835_(380S)_3900kv_Brushless_Inru nner]motor[/link]

and i would need the 1/8" to 3/16" set screw coupler at the bottom

[link=http://servocity.com/html/rigid_shaft_couplers.html]coupler[/link]
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Old 10-30-2009, 05:47 PM
  #225
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the coupler is unnecessary unless you get a boat with a u join as a coupler.

the motors are big, most of us are using 2040 size motors, the one you linked at the top is 2445, which is about the same size but will draw more power making run times shorter.

water pickup is optional, i run mine through the jet drive so as long as there is water moving through the drive, the motor and esc are being cooled

water outlet is unnecessary kinda, just put a hole that the fuel tubing will fit through and feed it out the back
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