The $44 BL motor test coming up

[deestingray]

Anyway, back on topic.

I am pretty confident that this motor qualifies as a $44 cheapie

http://www.r2hobbies.com/proddetail.php?prod=rcps81508_32

I bought it about 18 months ago and stuck it in my 26" ply/balsa/planked wild thing, granted the KV is kinda high for a knockoff but I was kind of a bit naive back then.
I matched it with a water jacket and a home cooled mystery80 esc, X440 prop on 10 nimh cells for a bit of speed but certainly not blistering. It was pretty much scorching after that run. So I decided to stick a logger on there to see what was going on. Being that it is an ET V2 and a 100amp limit, I kinda got the feeling that I was exceeding that as it didn't like the run at all and I only got a bit of data just before I stuck it in the water.
Dropped my prop down to an X435 for a totally different boat. It ran a lot quicker as the motor was unwinding a lot more, the amps came down to around 65 at 26500 rpm.
As of now, I have found that an X632 is an optimum prop for this motor and it is pretty quick now too. I run it on 2 x 3S1P 2200's 20C in parallel for a nice stable boat however I have recently been running it on 2 x 2S1P 3800 25C in series for 4S and a true Wild Thing. If running on 4S I will generally drop the size down to an X432 as it does tend to get a bit warm on the higher pitched prop.
The temps are pretty good for both 3S and 4S, usually after a 5 lap sprint the motor is sitting at around 120F.
From what I have found, yeah the knockoffs can be really good value but and I stress the word BUT, it is definitely a hit and miss affair.
I have been buying chinese stuff here and there in a few different hobbies, and found that the first couple of batches are usually the best ones, if you are lucky enough to get yourself an early batch item, it is usually pretty good quality. It is when they find out that something is a really good seller and start pumping many more out that the quality issues arise.

http://www.youtube.com/watch?v=L89uFditprg

As has already been stated, these motors cannot take a lot of prop but coupled with the right one can be quite good. For me, this one has paid for itself many times over and I have really flogged it. All for sport running but great value IMO.

[Doozie870]

14.8 x 2700 = 39,960 rpm lol

[Doby]

What???? What happened???? When did this Forum become RC Universe

[rockwerks]

Like I said....ran too hot for my liking on 4s and it might be more comfortable on 3s..

Ghost

What???? What happened???? When did this Forum become RC Universe

I know way too much drama, but good info!

[Jeff Wohlt]

Sorry, guys. I have edited my comments above. I know better than to respond to that stuff.

On to motors....can't wait for that report on the motors, Steve. Thanks for taking the time and money to produce good info that we can all use.

Heck if you get one good season from the motor in sport running then it has been fun and cheap. I just say watch putting one on your best CC240 or other $400 ESC for fear that you may destroy it as well. Run the $60 200 amp himodel or something like that.

Watch the heat in the bearings and /or replace them with good strong bearings....when the bearing goes....so does the motors internal parts and poof.

I would run one only after I really have a boat running dry and trimmed nicely. Then throw it in for good comparison. This will give you a greater advantage of what the motor compares to.

[lonewolf]

Great advice Jeff Thanks

[Jeff Wohlt]

Sorry...I did try and edit it guys but won't let me so here is my changes.

Flattery will get you everywhere, Steve. I sold Ned's... many of his and never claimed they were mine, nor did Ned want to sell to individuals or be known to everyone. Ned is a great machinist and a great guy and probably one of the the all-time best getting some of the poorest hulls to run like crazy!

I just happened to own a web site (www.rcraceboat.com) and wanted to do some marketing and help Ned and myself. I just did not have the time to make customers wait 4 weeks for a coupler. When I buy my toys I want them NOW.

Okay so I sell custom made couplers both tappered and straight with 2 set screws on the motor and 4 on the shaft and about any size except the larger ones Ned is kicking butt on. I would be glad to send you one still in the sales bag from Doug Twaits Sr that was made almost 10 years ago. So I did not steal anything that someone else had not already made. I just made it better.

I had Metals I and II in high school running lathes and other shop equipment. Then I worked at a Auto Shop for 2 years and had all the tools to play with as well and can make just about anything and the only reason I did not do it sooner is I had to save for good a lathe. So I do have some experience running machines. You should see my friggin metal cannon I made in shop.

So there you have it. after my shameless tactical plugs hrr hrr hrrr.... My major was in Marketing and PR. I am turning this into a positive post because that's the kind of guy I am.

It's all good...rock on!

[ace028]

Not really sure how all the drama got started. I'm glad that someone is testing these motors, there are lots of cheap ones out there that look appealing but we may not be sure if it would be as good as it looks. Having people test out new ideas and setups is nice, because if it works out, then there is another option available for a certin application. The FE community needs more options. It seems that most of the good stuff like escs are close to $200 for something decent to start with knowing that there may be alternitaves that reduce that cost is a great benifit for us that may only have $200 to spend on a whole project. And for a motor under $50 that may be a good alternative for certian applications is great, yes we may be limited on amp draw, but if it can get us started great. The ecomony electrics are also great for someone that is just starting in this awsome hobby. Who really wants to drop 400+ on a boat just to get into this hobby? I didn't, and still don't. Thanks to all for testing out these inexpensive alternatives for sport running.

[Doozie870]

I know for a fact first hand that the 4250 turnigy outrunner is dead on if not slightly more efficient than the electrofly ammo rimfire 4250 at a fraction of the cost.Inrunners may be different. you can count on me to find out.

[Jeff Wohlt]

Why would you use Outrunner motors in anything larger than a micro boat? Motors really need to be cooled since we push the motors very hard.

I have seen several do it in small boats but nothing larger because generally the KV is low.

[rockwerks]

Why would you use Outrunner motors in anything larger than a micro boat? Motors really need to be cooled since we push the motors very hard.

I have seen several do it in small boats but nothing larger because generally the KV is low.

I think hes trying to point out that many of these motors might built right in the same factory. Like 1:1 offorad winches. champion, black mountain, some ramsey, T-max, mile marker are all built in the same chinese factory.


you could cool and outrunner by using 2 motor plates one at either end. but still would not be as efficient of cooling system

[Doozie870]

Why would you use Outrunner motors in anything larger than a micro boat? Motors really need to be cooled since we push the motors very hard.

I have seen several do it in small boats but nothing larger because generally the KV is low.

I am using in them in planes, my point was if the outrunners are the same as what is generally considered a good brand, I suspect the same would be be true with inrunners. TURNIGY = AMMO in the outrunners

[bustitup]

Why would you use Outrunner motors in anything larger than a micro boat? Motors really need to be cooled since we push the motors very hard.

I have seen several do it in small boats but nothing larger because generally the KV is low.

I just came across this old thread and wondered if you still feel this way?


seems outrunners have come along way in the last year....scorpion has a 8 pole motor that will run fine at 300 deg f.....look at the specs on this sucker....4200 watts....its truley a torque monster

http://southriverrcboats.com/shop/article_SC-4035-400/Scorpion-HK4035-Series-Motor.html?shop_param=cid%3D20%26aid%3DSC-4035-400%26

I just got it and its going in a 41" catamaran on 10s2p

[Hydromaniac]

At the FE nats several guys were running some big boats with Scorpion OR's on 10s, Very fast . I'm impressed with the performance I have seen, Will be doing some testing this off season.

[Jeff Wohlt]

First off this thread went way bad as I read back in it.


Nope, outrunners are doing well in very select set ups...like 1/8 scale.

The difference is they found one that works well. I still do not see them for a replacement in just any boat/combo. They have some good kv to them but the ones working well are low KV and high Volts.

The only other reason is cooling.

I also see the problem with torque issues but since I do not run them then I do not know how they do on V hulls... which torque roll is a problem in many.

I have one coming for a larger airplane now and will get to finally see how they run.

Inrunners are getting cheaper as well. But...I have read plenty of the lower brand cooking...which could also cook other components as well. Cheap is cheap...no other way to look at it.

Fiego seems to be the best in the cheap class at this point.