1/8 scale hydro to electric conversion help
04-01-2022, 02:15 PM
#26
Been getting the set-up runs completed. The Miller American is closest. Handling is good and balance finally there. Wondering what is acceptable engine temp after run? I never brought temp gauge to pond but figured water jacket would take care of everything but touched it today and it felt hot. What should it be as you take it out of pond???
Thanks
Thanks
04-01-2022, 06:07 PM
#27
Had to call in some re-enforcement on this one since I only had a rough idea. What I was told is this:
- If you can't hold the motor by the end caps without burning your fingers, it's too hot. Now then, let's get to the details
- Using a infra-red temp gun, your battery packs, ESC and motor(checked on the ends, not the cooling jacket) should be no warmer than 140 degrees, with cool water going through the boat
- If the water is fairly warm(warm being over 70 degrees) it's not going to cool the electronics as well so you might see temps getting a bit higher, maybe to the mid 150s or so.
- Be sure you're not "over-propping" your boat. Depending on the weight of the boat, a 55-57mm prop is probably the largest you should be trying to run
- You might want to consider using a 200 amp ESC if you decide to really push the boats as my "expert" has recorded spikes up to around 170 amps with a data logger when the boat was jumping on rough water
Last edited by Hydro Junkie; 04-01-2022 at 06:10 PM.
04-02-2022, 10:10 AM
#28
Had to call in some re-enforcement on this one since I only had a rough idea. What I was told is this:
- If you can't hold the motor by the end caps without burning your fingers, it's too hot. Now then, let's get to the details
- Using a infra-red temp gun, your battery packs, ESC and motor(checked on the ends, not the cooling jacket) should be no warmer than 140 degrees, with cool water going through the boat
- If the water is fairly warm(warm being over 70 degrees) it's not going to cool the electronics as well so you might see temps getting a bit higher, maybe to the mid 150s or so.
- Be sure you're not "over-propping" your boat. Depending on the weight of the boat, a 55-57mm prop is probably the largest you should be trying to run
- You might want to consider using a 200 amp ESC if you decide to really push the boats as my "expert" has recorded spikes up to around 170 amps with a data logger when the boat was jumping on rough water
04-02-2022, 01:32 PM
#29
Had to call in some re-enforcement on this one since I only had a rough idea. What I was told is this:
- If you can't hold the motor by the end caps without burning your fingers, it's too hot. Now then, let's get to the details
- Using a infra-red temp gun, your battery packs, ESC and motor(checked on the ends, not the cooling jacket) should be no warmer than 140 degrees, with cool water going through the boat
- If the water is fairly warm(warm being over 70 degrees) it's not going to cool the electronics as well so you might see temps getting a bit higher, maybe to the mid 150s or so.
- Be sure you're not "over-propping" your boat. Depending on the weight of the boat, a 55-57mm prop is probably the largest you should be trying to run
- You might want to consider using a 200 amp ESC if you decide to really push the boats as my "expert" has recorded spikes up to around 170 amps with a data logger when the boat was jumping on rough water
You can also text me his contact information and I will keep it between us. Also, my Circus is a little heavier. Should I use smaller prop on it. I have a 57 mm on the Miller and it is running well now
04-02-2022, 03:27 PM
#30
Trust me, he's more in the know than I am as well. We spent almost an hour talking, last night, before I did my post above. Since the only thing him and his family race is FG electric scales he knows his stuff, so much more than I that it makes me look like a rank beginner, which I am not. I'll send you a PM with his name and number a bit later.
04-03-2022, 10:30 AM
#31
Trust me, he's more in the know than I am as well. We spent almost an hour talking, last night, before I did my post above. Since the only thing him and his family race is FG electric scales he knows his stuff, so much more than I that it makes me look like a rank beginner, which I am not. I'll send you a PM with his name and number a bit later.
