2500 watt brush less motor

[dwilfong]

OK I'm hooked! Building a rigger 21 nitro size want to go eclectic. Found batt on flea bay 1.3 lbs 112amp 22.2 volt. Also found 100amp 22.2v speed controller.

The only problem is a motor that wont cost me a left n@# any one know of a cheep motor. was looking at nemesis blue but thy don't give the specs.

 

[TRUCKPULL]

Look here

http://www.offshoreelectrics.com/

Larry

 

[dwilfong]

Look here
http://www.offshoreelectrics.com/

Larry

Yes the 1527 1D would work fine for a 3.25hp setup but $260. That why I was asking about the nemesis it $100. The speed controller is $31 and batt $120 .

The water cooling plate was what I was looking for (cheap controller doesn't have one).

This set up should run as good as 21 nitro with out the fuel coast or glow plug coast.

Could spend more time on prop and set up.

 

[yurkanip]

Look here
http://www.offshoreelectrics.com/

Larry

Yes the 1527 1D would work fine for a 3.25hp setup but $260. That why I was asking about the nemesis it $100. The speed controller is $31 and batt $120 .

The water cooling plate was what I was looking for (cheap controller doesn't have one).

This set up should run as good as 21 nitro with out the fuel coast or glow plug coast.

Could spend more time on prop and set up.

I run brushless riggers, hydros. I have used and continue to use Feigao/nemesis motors with great success. For a 22.2 (6s) setup, I would suggest that you keep the kv well below 2500, as you mentioned earlier. For 6s, you will want to be in the 1400-1600kv. This will still get you into the 60s, when tuned on a .21 sized rigger. For Esc...you can't go wrong with a watercooled, and waterproofed himodel 200a, OR the very consistent and sturdy 100a turnigy, esc from hobbycity. I use that one, currently and it is great! runs very cool without water cooling in my 6s rigger. To make the cooling plate. it is very easy to solder tubes to a piece of brass plate and attach it to the fets, then shrink wrap after you waterproof it with dp-270 or other non conductive epoxy.

 

[dwilfong]

Look here
http://www.offshoreelectrics.com/

Larry

Yes the 1527 1D would work fine for a 3.25hp setup but $260. That why I was asking about the nemesis it $100. The speed controller is $31 and batt $120 .

The water cooling plate was what I was looking for (cheap controller doesn't have one).

This set up should run as good as 21 nitro with out the fuel coast or glow plug coast.

Could spend more time on prop and set up.

I run brushless riggers, hydros. I have used and continue to use Feigao/nemesis motors with great success. For a 22.2 (6s) setup, I would suggest that you keep the kv well below 2500, as you mentioned earlier. For 6s, you will want to be in the 1400-1600kv. This will still get you into the 60s, when tuned on a .21 sized rigger. For Esc...you can't go wrong with a watercooled, and waterproofed himodel 200a, OR the very consistent and sturdy 100a turnigy, esc from hobbycity. I use that one, currently and it is great! runs very cool without water cooling in my 6s rigger. To make the cooling plate. it is very easy to solder tubes to a piece of brass plate and attach it to the fets, then shrink wrap after you waterproof it with dp-270 or other non conductive epoxy.

This would put the RPM's at 37000 with the 10 wind motor and the right prop. Would you use the same prop that a nitro eng would use.

 

[TRUCKPULL]

Look at this motor

http://www.offshoreelectrics.com/proddetail.php?prod=kb-45

Larry

 

[dwilfong]

Look at this motorhttp://www.offshoreelectrics.com/proddetail.php?prod=kb-45

Larry

Yaa Thats the one to bad it's out of stock.

 

[TRUCKPULL]

How about this one

http://www.offshoreelectrics.com/proddetai...?prod=fei-580-L

Larry

 

[TRUCKPULL]

They are not out of stock here

http://www.hobbycity.com/hobbycity/store/u...shless_Inrunner

Larry

 

[dwilfong]

How about this one
http://www.offshoreelectrics.com/proddetai...?prod=fei-580-L

Larry

only 1300 watts need 2220 watt to use all the controler power and batt power 22.2v 100 amp batt 100amp controler.

 

[TRUCKPULL]

Dave

Check the post above.

http://www.hobbycity.com/hobbycity/store/u...shless_Inrunner

Larry

 

[dwilfong]

They are not out of stock here
http://www.hobbycity.com/hobbycity/store/u...shless_Inrunner

Larry

You are the man the 1800 kv is the one 40000 RPM and only $42.

 

[TRUCKPULL]

40,000 RPM is too high unless you are running a rigger for under 10 seconds.

What type of hull are you going to run, and how long are the runs??

Larry

 

[dwilfong]

40,000 RPM is too high unless you are running a rigger for under 10 seconds.
What type of hull are you going to run, and how long are the runs??

Larry

I have a set of the Kep,s 21 plans so far have the sponsons built and the tub 3/4 done for 21 nitro set up. Tub is easy to build will make one for FE setup and swap sponsons between tubs. Should be able to keep weight to 4lbs or less I hope.

How do you calculate run time.

Would like to race it but have not checked out clases to much I think N2 hydro?

 

[yurkanip]

40,000 RPM is too high unless you are running a rigger for under 10 seconds.
What type of hull are you going to run, and how long are the runs??

Larry

I have a set of the Kep,s 21 plans so far have the sponsons built and the tub 3/4 done for 21 nitro set up. Tub is easy to build will make one for FE setup and swap sponsons between tubs. Should be able to keep weight to 4lbs or less I hope.

How do you calculate run time.

Would like to race it but have not checked out clases to much I think N2 hydro?

http://www.intlwaters.com/index.php?showto...rushless+rigger This is my build of the Keps .21, and id my 6s brushless rigger....finally got all of the kinks worked out, with stuffing tube etc..and it screams now!

Patrick

 

[dwilfong]

40,000 RPM is too high unless you are running a rigger for under 10 seconds.
What type of hull are you going to run, and how long are the runs??

Larry

I have a set of the Kep,s 21 plans so far have the sponsons built and the tub 3/4 done for 21 nitro set up. Tub is easy to build will make one for FE setup and swap sponsons between tubs. Should be able to keep weight to 4lbs or less I hope.

How do you calculate run time.

Would like to race it but have not checked out clases to much I think N2 hydro?

http://www.intlwaters.com/index.php?showto...rushless+rigger This is my build of the Keps .21, and id my 6s brushless rigger....finally got all of the kinks worked out, with stuffing tube etc..and it screams now!

Patrick

Did you use two batt to get the right balance or fore the power?

What prop and motor combo did you finely use?

 

[Ub Hauled]

I agree with Larry,

this is WAY WAY too much RPM...

you need to keep it under 27000 so you can

have some run time and not worry about heat.

for the N2 oval boat usually people are using the

1509/1Y (3600Kv) that sets you just short of 27000.

These motors have a very good efficiency ratio (over 87%)

meaning they generate less heat then the less efficient motors,

i.e. not so well built motors.

If you wanna spend little money on your future brushless, I'd find

something that will have around 3300-3400 Kv, and just to be on the safe side,

a motor that is big in size, for heat dissipation.

Just my opinion.

 

[dwilfong]

I agree with Larry,this is WAY WAY too much RPM...

you need to keep it under 27000 so you can

have some run time and not worry about heat.

for the N2 oval boat usually people are using the

1509/1Y (3600Kv) that sets you just short of 27000.

These motors have a very good efficiency ratio (over 87%)

meaning they generate less heat then the less efficient motors,

i.e. not so well built motors.

If you wanna spend little money on your future brushless, I'd find

something that will have around 3300-3400 Kv, and just to be on the safe side,

a motor that is big in size, for heat dissipation.

Just my opinion.

So a lower voltage pack with high amh and kv motor to get 27000 RPM.

What would be the best voltage to use?

 

[TRUCKPULL]

I run a Blazer marine Sport 20

2200 KV motor

4S2P 30C - 4350 packs

1 mile race time is 1 min. 25 Sec. for 6 laps on a 1/6 course

Speed is well over 50 MPH in a straight line.

This Sport hull holds the record of over 98 MPH on 4S

For Racing

Sport Hydro runs at about 32,000 RPM

A Rigger should run about 35,000 RPM

A mono about 25 to 28,000 RPM

My 2S Sport Hydro 4400 KV runs at 32,000 RPM also.

It also runs the same speed as my 4S boat, 1 min. 25 Sec. for 1 mile on a 1/6 course.

Larry

 

[yurkanip]

Dwilfong, my hull was enlarged from the plans 240% so the final tub length was about 30" overall is 34 or so. I use a Feigao 11xl, and 10xl, with (2) 3s packs in series to give me 22.2v or 6s. The multiple packs is great for balance and from where I placed my motor, the boat rides perfectly, with a strut set at 18.5mm and about 1degree negative. For the money, you can not go wrong with feigao....60-70$...is great for a motor.

for your setup (if the keps hull you built is the original plan and not enlarged...I would suggest 4s lipo, and the castle neu 1515 1y from ebay...they are 149$...a steal and run almost identical to the original Neu motors. (others might disagree here, but thats my 2 cents). I have emailed extensively to Niklas, who designed the keps .21 rigger in sweden. and he pointed out, that it needs a rear ski, or a rear sponson if you will. I agreed, after running mine without. Mine will go on my hull tomorrow.

prop..is x637 and x640...this hull seems to like the x637...it really makes the 6s come alive...since my kv is only 1516.

Let me know if you have questions..I will gladly help if I can.

Patrick