Motor/ESC and battery combo - will this work?

[Simon170]

Since this is my first foray into boating I thought I'd better check this over with you guys before ordering my Lipos...

I have an ABC Gancia Dei Gancia (basically a Super Hawaii) that I'm in the process of rebuiling and converting from nitro to electric.
I'm most of the way there now and I need to sort out getting some Lipos, I have a UL-1 brushless motor and ESC, and the boat has a 44m prop.

I want to run two of these in parrallel: http://www.hobbycity.com/hobbycity/s...dProduct=11936 giving 14.8 volts and 10000mah

I figure this will give good performance (its only a fun boat) and much better run time

I just wanna check I'm not gonna smoke my Aquacraft 60amp ESC.

I thought this was the best place to post, as its about the whole electrical setup.

Thanks

[forescott]

I'd say thats more than enough battery for your setup. 10,000mah X 25c = 250amps. 10,000mah x 50c = 500amps. So your batteries will provide 250-500 amps according to their specs. And that ul-1 esc has a rating of 60amps. continuous. I think your covered. You could get a pair of regular (non-nano tech) 20-30c 5000mah turnigys and save some $$$. You'd still be getting 200-300 amps from them.

[Simon170]

Scott: thanks for the reply. Will having this much battery on board pop my ESC? or will it pop only if the motor draws more than 60amp? Sorry if I seem a little lost, but I've never had to deal with amps in RC before.

[JMSCARD]

Nope you will be fine with those bigger better batts with the higher c rating.... You will only pop the esc if you try pushing more then the 60 amps... The batts being higher c rating won't hurt the esc.... I'd go with the better batts... Then when you get hooked on the electrics you will have the better batts for higher amp draw applications:) welcome to the forum!!!!!!

[Simon170]

JMS: You sir, are a gentleman, thankyou!
So as long as the motor doesnt get anymore powerful/draw any more amps, I'm ok. Thats a relief. Last thing I want to do is get the batts, rewire the ESC and blow it up lol

I know what you mean about getting hooked, I'm already looking at the Traxxas Titan and I havent even finished this one yet! haha.

If I might impose another question on you, is the UL-1 motor going to under powered for my boat? Kookie Guy said it might not be up to the job. The boat 36", but most of it is "nose" and from I have seen on Youtube, when it gets up on plane theres very little of it in the water.
I can post a pic of the hull if needed.

Cheers :)

[Diesel6401]

JMS: You sir, are a gentleman, thankyou!
So as long as the motor doesnt get anymore powerful/draw any more amps, I'm ok. Thats a relief. Last thing I want to do is get the batts, rewire the ESC and blow it up lol

I know what you mean about getting hooked, I'm already looking at the Traxxas Titan and I havent even finished this one yet! haha.

If I might impose another question on you, is the UL-1 motor going to under powered for my boat? Kookie Guy said it might not be up to the job. The boat 36", but most of it is "nose" and from I have seen on Youtube, when it gets up on plane theres very little of it in the water.
I can post a pic of the hull if needed.

Cheers :)

36" is a mighty big hull for a ul motor. I think I would have to agree that it might be too small. A lower KV XL or Leopard would work better. JMHO

[Simon170]

36" is a mighty big hull for a ul motor. I think I would have to agree that it might be too small. A lower KV XL or Leopard would work better. JMHO

Damn


Are there any that I can use with my 60amp esc?
I dont really want to have to buy another esc and motor, especially as both likely be far more expensive than the units I have now.

I was trying to keep this build on a budget, but I think that might be a struggle.

Thanks for the welcomes, friendly forum

[Diesel6401]

Damn


Are there any that I can use with my 60amp esc?
I dont really want to have to buy another esc and motor, especially as both likely be far more expensive than the units I have now.

I was trying to keep this build on a budget, but I think that might be a struggle.

Thanks for the welcomes, friendly forum

The 60amp will not work, if you got a very low kv motor with low amp draw it would handle the amps, but low kv motors need more volts and that's where the ul esc would suffer. To keep on a budget you could sell the ul1 motor/esc on the swap shop. Also a GREAT cost effective option would be to grab a castle motor while their on sale http://www.castlecreations.com/promo...clearance.html, the 1518 on 4/5s or 1520 on 5/6s would work well and with a Seaking 180 you could have a awesome setup for under $200 and if you sell the ul stuff even cheaper out of pocket for a better power option for that boat.

[Simon170]

So I need to be looking in the 1600-1800kv sort of area?
I think I'll need to reposition my motor from the sounds of it, as most of the motors you mention are longer than than the UL-1 and I'm getting tight for room (just made a beautiful mount as well...)
I'd seen the Seaking 180, but I didnt really know enough about it at the time of deciding what to buy.
I had been working in the wrong assumption that higher Kv was better for speed/power

Thanks for your help Diesel, your help is greatly appreciated

Shopping list:
1600/1800kv motor
Water cooling jacket
Seaking 180
6s Lipo's

[Make-a-Wake]

I have the NQD version of the Hawaii. Called a spurt but is almost identical. I run it on 6s with a 1260kv Feigao XL and it hits 33 mph. I use a turnigy 120a, they are only 49 bucks at hk and are a great value for the money. A UL1 motor is too small in my opinion. You can go 4s and an 8XL but you still need a 120 speedo minimum

[Diesel6401]

So I need to be looking in the 1600-1800kv sort of area?
I think I'll need to reposition my motor from the sounds of it, as most of the motors you mention are longer than than the UL-1 and I'm getting tight for room (just made a beautiful mount as well...)
I'd seen the Seaking 180, but I didnt really know enough about it at the time of deciding what to buy.
I had been working in the wrong assumption that higher Kv was better for speed/power

Thanks for your help Diesel, your help is greatly appreciated

Shopping list:
1600/1800kv motor
Water cooling jacket
Seaking 180
6s Lipo's

The higher kv is more top end less torque and more amp pull and less volts needed. For a hull that big you need a motor that can put out some torque. KV is a kinda tricky. For example I run a leopard 4074 2200kv in a 33" mono on a m445 prop on 4s, but I run a leopard 4074 1774kv motor on 4s with a 48mm prop in a cat. Both are fast, it's just a matter of what you looking really. At 36" even though only 3" longer than my mono I would go with a lower kv and a decent size prop. Do you want to run 4s, 5s or 6s? For an idea I run ul-1 motor in a 23" mono (click the h&m no step video in my signature, for ul power in a 27" mono click the sv27 video). Both hulls move very fast run very cool, but I would not go out of the 23-29 range with ul1 power.

[Simon170]

Seaking Vs Turnigy ESC?

Which way should I go.....

[Diesel6401]

Seaking Vs Turnigy ESC?

Which way should I go.....

Which Turnigy? The Turnigy Marines are Seakings. Hobbycity makes nothing, they re-brand everything.

These are the same:
Seaking / Turnigy

These are the same:
Swordfish / Aquastar

These are the same:
Seaking 120 / Turnigy Marine

Confusing huh...lol

[Simon170]

Very lol

So I'll go for which ever I can find the cheapest out of the two then.

Thanks for the info on the KV issue. I wanna run as many volts as possible, so 5/6s I guess.
The prop is the one that came on the boat, I was going to get it all up and running and play with prop size after.

Just looked at your vids... made me laugh... I have looked at them before and are one of the reasons I got the UL-1 LOL! Oh well, live and learn.

I wondering if I should give the setup I have a try, it might be fast enough for me. Or is more a question of things will over heat?

[Flying Scotsman]

A 36" hull with UL-1 power is not going to do the job unless you are happy with 20mph speeds and that will be with a small prop. if you want faster speeds on a dubious hull.....lots of cash and you may not be happy with the results

Douggie