Mamba XL/Neu-Castle 2028 780kv Motor Combo 10HP!!!

P

PHC

100 mW
Joined
Feb 11, 2011
Messages
45
The Castele Mamba XL/Neu-Castle 2028 780kv Motor Combo is rated for 10 HP from 36 volts. Its a 1/5 Baha RC motor I found today while looking around. I saw a picture of it next to a soda can and its about the same size. The thing that interests me is it is completely enclosed and sealed with cooling fins machine into the motor case. With high volume air to keep it cool it looks like it would work for an electric bike or motorcycle. Its around $500 for the motor and controller, compared to the Asian hub motors this compares favorably. Here is a link for the Castle info page,

http://www.castlecreations.com/products/mamba_xl.html

What do you all think?

Paul
 
if you use a 4:1 geardown with a #25 chain, and then a planetary gearbox. its possible to use this motor.

like this
http://endless-sphere.com/forums/viewtopic.php?f=28&t=12687&start=270
 
I wouldn't recommend it. That is a lot of RPM to reduce, and you will not have amp limiting on hills. I have some of these combos sitting right next to me. They are impressive for what they are, but ebike parts they are not. Sure it would work, but it wouldn't be ideal by a long shot.
 
Sensorless is fine for RC toys, not so great for ebikes.
 
Great idea since I already have a planetary gear box form another project. I found one with the controller on ebay new for $415 delivered so I just purchased it. I really want to build a reverse trike Velo style motorcycle. A backup idea is they sell small 50cc pit-bikes without the motor on eBay cheap that I could outfit with street tires Motard style. I need batteries now so the search is on.
 
PHC said:
I need batteries now so the search is on.
Click to expand...


www.hobbycity.com
 
What do you think of 3 of these in parallel ?

Turnigy nano-tech 4000mah 10S 45~90C

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=14614

Thanks,
Paul
 
If I use 2 of these in parallel with it double the discharge rate to 50C?

Minimum Capacity: 5800mAh
Configuration: 8S1P / 29.6v / 8Cell
Constant Discharge: 25C
Peak Discharge (10sec): 35C
Pack Weight: 1216g
Pack Size: 162 x 49 x 80mm
Charge Plug: JST-XH
Discharge plug: 5.5mm Bullet-connector

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=14996

Thanks,
Paul
 
I Guess what I am asking is if I use 2 batteries in parellel can I buy less expensive lower discharge rate packs since weight is less of a problem.

Alan B said:
No, but it will double the value of C!
Click to expand...
 
I came across this when I was looking at ways of having a transmission.

TAV2 Torq-A-Verter

http://www.hoffcocomet.com/EpiphanyWeb/flexpage.aspx?ID=75

I would use a sprocket and chain reduction to put the RPM in the ball park for its 800-4000 RPM requirments.

Just an idea to lower the stress on the motor.
 
PHC said:
I Guess what I am asking is if I use 2 batteries in parellel can I buy less expensive lower discharge rate packs since weight is less of a problem.

Alan B said:
No, but it will double the value of C!
Click to expand...
Click to expand...

Yes. If the current is equally shared each battery will see only half.
 
PHC said:
I came across this when I was looking at ways of having a transmission.

TAV2 Torq-A-Verter

http://www.hoffcocomet.com/EpiphanyWeb/flexpage.aspx?ID=75

I would use a sprocket and chain reduction to put the RPM in the ball park for its 800-4000 RPM requirments.

Just an idea to lower the stress on the motor.
Click to expand...

Hard to tune and eats power. Ask this guy: http://www.endless-sphere.com/forums/viewtopic.php?f=12&t=25841

He's losing power through his and only gaining a little top end. Currently he's experimenting with different springs to see if he can find a set that will hold up.

They're just not very efficient because the belt is always slipping.
 
If 5800mAh is equal to 58 Ah, if I buy 2 5800mAh lipo packs I will get proximately 100 Ah capacity correct?

Regards,
Paul
 
If you have one 5800mah pack, and 20c discharge. The max discharge is 116a.
The pack is 5.8ah.

if you have 2 packs in parallel, the Max. Discharge is 232a. The pack is 11.2ah.
 
Thanks. So why do the RC folks rate battery packs using different terms then the bike battery folks?
Just wondering.



nieles said:
If you have one 5800mah pack, and 20c discharge. The max discharge is 116a.
The pack is 5.8ah.

if you have 2 packs in parallel, the Max. Discharge is 232a. The pack is 11.2ah.
Click to expand...
 
Thanks again, I also found this helpful reference,

http://www.answers.com/topic/mah

and also this one for how brushless motors work,

http://www.answers.com/topic/brushless-dc-electric-motor

nieles said:
The only difference is mAh and Ah. 1000mAh is 1Ah.
Click to expand...
 
I found this 24 volt 12Ah battery pack made from headway cells on ebay and it seems like a very good deal for a complete solution including a charger.

http://cgi.ebay.com/24V-12Ah-lifepo4-headway-battery-pack-power-ebike-/190503733907?pt=US_Batteries&hash=item2c5ae84a93

To me the advantage is I could reuse the cells to build a larger pack later on if I needed more capacity. I live in Houston which is pretty flat overall and I am not trying to win any races so keep that in mind.

Does anyone see a problem using this pack?

Thanks,
Paul
 
Mixing old cells with new cells is not a very good idea. (When you want to add cells to your pack)
Other than that is see no problem if you are not after performance.
 
I received the motor and controller today via Fedex. After soldering the lugs onto the 3 motor connecting wires I tested it by hooking it to a 24 volt 8.5 amp switching power supply. I used a servo tester as a throttle input and everything seems to be working fine. The motor is not as loud as I would have expected so overall my impression is good. It does get very warm after several minutes of just letting the motor run unloaded. I will be making a fan shroud and use some powerful PC style fans to cool it. I ordered 2, Turnigy 5800mAh 8S 25C Long Lipo Packs (USA Warehouse) for it from Hobby King which I will run in parallel. The controller has data logging so I will post a download after I get everything installed. I also ordered a "Martin 25B19 Non Bored Sprocket" which I will ream to match the motor output shaft. I plan on running a chain drive reduction 1:4 to reduce the RPM to a workable level. I am also looking into clutch options.
I own a 3 axis CNC small mill and a 14" HF lathe, and also a 3 axis CNC 24X36" router which I recently designed and built. I have been an aircraft structural mechanic for over 25 years, so handling the mechanical part of the build shouldn't pose a serious problem.

Regards,
Paul
 
You must log in or register to reply here.

Similar threads

Timma2500
Show us your RC car, plane, helicopter, boat etc
Replies
15
Views
2,956
def215
def215
Reid Welch
"Extreme MY1018" archival, closed out
Replies
11
Views
15,731
GIGATT
G
Back
Top