2650 castle 1512

[rc rob]

Thats what I need I really dont like learning the hard way at three hundred dollars a pop. I did that when I taught myself how to fly. I havent read this much of anything in 15 years. I have been into rc stuff for 25 years so I will catch on to boats fast. Its just a pile of different parts I will be replacing lol.

[Boaterguy]

budget option:
this motor:

http://fightercatracing.com/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=56&category_id=11&option=com_virtuemart&Itemid=1

either batt:

http://www.haiyinstore.com/products.asp?p_id=201&PID=202+&PID=203+&PID=204+&PID=205+&PID=206+&PID=207+

http://www.haiyinstore.com/products.asp?p_id=207

either of these, or both:
http://www.offshoreelectrics.com/pro...od=grp-2317.42
http://www.offshoreelectrics.com/pro...?prod=oct-x442

you could also go with a turnigy 4082, but i don't know the kv's off hand.

[rc rob]

I already have turnigy 5000 a 5800 4s 30c turnigy 5000 3s 40c turn 4000 40c so I think im ok on that. I have a 442 prop spectrum rx tx 180 turnigy esc and I think I will pick up a 40mm prop try out the 2650 and monitor it close on 3s and 4s if she runs hot try out lepord 4074 2000kv or turnigy 4082 1600kv so that will be my next question wich motor would give more speed yes another speed freek.

[Snowride]

4082 has more hp.

[Boaterguy]

yea, but 1600kv on 4S isn't much RPM, isn't there a slightly higher KV one?

[Snowride]

yea, but 1600kv on 4S isn't much RPM, isn't there a slightly higher KV one?

just increase prop size and you end up the same power to the water. Higher RPM is not always the correct answer. On 4s that motor unloaded will spin close to 24,000.

This recommendation comes from this site. "OSE Suggests 20,000-35,000 total rpm for boats. We (Leopard) suggest most Fast Electric Boaters should run in the 25,000RPM range for Sport Boating or 30,000RPM Range for racing"

[Brushless55]

just increase prop size and you end up the same power to the water. Higher RPM is not always the correct answer. On 4s that motor unloaded will spin close to 24,000.
This recommendation comes from this site. "OSE Suggests 20,000-35,000 total rpm for boats. We (Leopard) suggest most Fast Electric Boaters should run in the 25,000RPM range for Sport Boating or 30,000RPM Range for racing"

24k with a big prop on a hull this size could cause torque roll issues
sometimes more rpms with smaller props is better...
this hull is small and light and IMO would work better with 30-35k rpms and a smaller prop

[rc rob]

So if I run my castle 2650 on 3s will it drop the rpm to where I need to be say runing a 38 or 40mm prop.

[Brushless55]

So if I run my castle 2650 on 3s will it drop the rpm to where I need to be say runing a 38 or 40mm prop.

if you only run 3s then you will want a 42mm and bigger prop..
on 4s with the higher rpms that's what I was saying a smaller prop like 38-40mm would be a good choice...

[rc rob]

k thanks for the info its all ice here in michigan so I have time to stock up on differnt set ups for the boat. If I can drink enough beer I should have enough beer can money to buy both motors haha.