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Crackerbox electric motor + esc recommendations

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Old 12-30-2017, 08:24 PM
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P-21
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Post Crackerbox electric motor + esc recommendations

Hi, guys.
I'm a rather old nitro racer that has competed back in the 70's in A hydro NAMBA races. I'm trying to finish my second but delayed Cracker project from back in 81'.
It's a 28" x 10" beam William Koster Racing Crackerbox (the next up is the .40 size on RCM plans) meant for a .21 nitro and I want to go electric strictly for racey fun with no competition in mind.
Hull is just minus the deck and some finish cockpit moulding, been that way since 81 sitting on a shelf whispering finish me.
Been looking at motor and esc stuff on several places but it's not as easy as buying a .15-.21 engine and playing with props so I thought I'd give you guys a try.
Maybe looking for a similar 8-10 minute run time and 30+ would be fine, I have two small lakes near by. I don't have anything to weigh but guessing about
4 - 5 lbs. finished with radio and a nitro engine.
One thing I forgot to mention is that this will have the prop under the transom, scale like as per plans so this will affect the motor rpm also.
Appreciate your thoughts and any links or stores. Thanks,
Dave

ps=what are the picture size requirements / limits here and I'll post one of the hull?
will post a picture of finished one from Legg Lake Ca also 1971.

Last edited by P-21; 12-31-2017 at 09:17 AM.
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Old 12-31-2017, 10:44 AM
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Posted some pictures in mygallery.
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Old 12-31-2017, 08:12 PM
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An excellent powertrain would be the ProBoat 1500 Kv motor and the AquaCraft 60 amp or ProBoat 60 amp ESC running a 4S/5000 mAh pack. Speed and run time would be controlled by prop size.


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Old 01-02-2018, 10:50 AM
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Found these 3 on Amazon... thoughts?

Dynamite 6P BL 1650KV Marine Motor, 40 x 82mm

amazon.com/Dynamite-1650KV-Marine-Motor-82mm/dp/B0170G0RQI/ref=sr_1_fkmr1_4?s=toys-and-games&ie=UTF8&qid=1514917451&sr=1-4-fkmr1&keywords=Dynamite+2000KV+Marine+Motor

Dynamite 4P BL 1750kv 40x68mm Marine Motor

amazon.com/Dynamite-1750kv-40x68mm-Marine-Motor/dp/B0109O1EW4/ref=sr_1_fkmr1_3?s=toys-and-games&ie=UTF8&qid=1514917451&sr=1-3-fkmr1&keywords=Dynamite+2000KV+Marine+Motor

Traxxas 3350R Velineon VXL-3s Brushless Power System

amazon.com/Traxxas-3350R-Velineon-VXL-3s-Brushless/dp/B00LMJI2N0/ref=sr_1_2?s=toys-and-games&ie=UTF8&qid=1514914913&sr=1-2&keywords=Traxxas+Velineon
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Old 01-02-2018, 10:56 AM
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Kinda like the complete traxxas stuff, a little more power would be ok, I like this cause of these features:
  • ESC features 3 drive profiles: Sport, Race, and Training Mode to limit throttle to 50% for inexperienced drivers (maybe for grandson time)
  • Integrated two-stage low-voltage detection for Lithium Polymer (LiPo) battery usage.Input Voltage: NiCad/NiMH 4-9 Cells (4.8 to 10.8 Volts DC); LiPo 2-3 Cells (7.4 to 11.1 Volts DC)
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Old 01-02-2018, 06:48 PM
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These are really not suitable for your boat. The first two are way too big and heavy, the Traxxas is really for cars, not boats. Here are better recommendations:

Controller: https://www.ebay.com/itm/Brand-New-F...-/141944856772

Motor: https://www.ebay.com/itm/NEW-Pro-Boa...ss!85234!US!-1

These require a 4S pack, I recommend 4000-5000 mAh capacity and minimum 40C rating. You can control speed range by changing prop sizes, this is easier on the ESC.


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Old 01-03-2018, 08:46 AM
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Hey, thanks so much for your help!!!
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Old 04-09-2018, 07:22 AM
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Hello Guys ... I need some technical help ....

I bought brushed dc motor 775 from (aliexpress(dot)com) and an ESC (RC Boat 7.2-14.8V 480A ESC 380/540/775 Brushed Motor Speed Controller Dual Mode Regulator).

The seller told me they work together fine ... However, I am using a 12V/12A Lead Acid battery to operate the system and I would like to use the Arduino to control everything on the boat. I am using Xbee for communication. My questions are:

1. Is the battery fine to be used along with ESC and motor? Is the ESC is suitable for the motor ?

2. I am not using an RC receiver. Instead I am using Arduino to send control signals. The ESC has three wires for control: black, red, and white. I connect the black to GND, White to PWM signal from the Arduino. What about the red ? Do I connect it to the Vcc = 5V ?

You help is highly appreciated... Thanks
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Old 04-10-2018, 02:37 AM
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Originally Posted by mohhasco View Post
Hello Guys ... I need some technical help ....

I bought brushed dc motor 775 from (aliexpress(dot)com) and an ESC (RC Boat 7.2-14.8V 480A ESC 380/540/775 Brushed Motor Speed Controller Dual Mode Regulator).

The seller told me they work together fine ... However, I am using a 12V/12A Lead Acid battery to operate the system and I would like to use the Arduino to control everything on the boat. I am using Xbee for communication. My questions are:

1. Is the battery fine to be used along with ESC and motor? Is the ESC is suitable for the motor ?

2. I am not using an RC receiver. Instead I am using Arduino to send control signals. The ESC has three wires for control: black, red, and white. I connect the black to GND, White to PWM signal from the Arduino. What about the red ? Do I connect it to the Vcc = 5V ?

You help is highly appreciated... Thanks
Okay, time to give you a head's up. You have asked the same question in three unrelated threads. This is considered "spamming" and is not allowed. You would be better served by starting your own thread as you're taking three other people's threads and and doing what's referred to as "hijacking" them.

Last edited by Hydro Junkie; 04-10-2018 at 02:41 AM.
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