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Old 11-07-2017, 09:31 PM   #1
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Default TechToys V24 ”rebuild thread”

This is my first new thread at rctech. I used to hang out at URC. Hope you like it!

RC power boats are something I know very little about. I built one back in the 80’s and powered it using an old slotcar motor. I drove it once and put it on the shelf.

Recently a friend who is into rc boats gave me a couple of leftover hulls. He is not knee-deep in RC like I am, between building a house, work and family he sometimes run RC boats in the evening to relax. He gave me a used Tech Toys V24 and one a NIB Graupner Speedy.

I decided to start with the V24. The Speedy deserves more knowledge than I currently possess, I reckon.

The V24 is a toy-grade boat - Mhz radio, fully integrated electronics, steering using dual 380 brushed motors and cutting power to one side to turn.

The motors were rusty and seized. Props broken. Transmitter non-existent. Lots of sand inside - from running in sea water.

After looking at the boat a few weeks and googling a lot I realized shafts and props were toy grade too and not easily available as spares. Two new 380:s and dual brushed controllers and using a delta mixer would have been neat but buying all that meant a) minor performance improvement and b) cash out.

I just pulled everything out and scrapped it. In my box of leftovers I found a Racerstar 540 brushless motor used in my MERV. Then I ordered some random axles, props, rudder etc from Bangood.

Last edited by KristofferR; 11-07-2017 at 09:39 PM. Reason: Hit send too early
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Old 11-08-2017, 12:39 PM   #2
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I used hotglue and some scrap pieces of wood making a motor mount



Motor in position with a shaft from Banggood and a makeshift guide.



Just before testing the system. It sounds pretty cool.



Weight check; dont remember the numbers!



Orange is the new black. Or the opposite. I painted the windows black and put a stripe up front. It still looks meh but before it was worse.



Banggood rudder and snakes from my collection of RC airplane stuff. No cooling yet, TBD after first run.
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Old 11-13-2017, 03:32 PM   #3
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I would use epoxy vs hot glue from past experence.
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Old 11-14-2017, 12:35 PM   #4
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I’m normally not a hot glue person, do you think it will melt, get brittle - what happened to you?
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Old 11-14-2017, 02:14 PM   #5
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I had problems with the glue holding to the plastic hull and it just pulled away. I would get a mount like this and two part epoxy, scuff hull. https://www.offshoreelectrics.com You will probably also want to go with water cooled electronics, boats draw lots of current and stuff gets warm quick.
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