Need some help collecting motor data

[dethow]

Actually Dave, along with the bare motors bring the loose can coolers also. If we weigh those independently we may be able to keep a "cheat sheet" handy showing the predetermined weight allowance for "X brand of Water Jacket". Then some quick math will help determine if motor is over the limit. I can tell you an Aquacraft gold cooling jacket is around 33grams from memory. I would suspect the HRC jackets will be the heaviest.

We can do the same thing with Connectors.

Will do on the cans... And I'll also bring a couple of the OSE upgrade jackets that I use on my motors.
https://www.offshoreelectrics.com/pr...=ham-ul1-sv27r

I'll make sure to document a weight on those motors before I remove the stock connectors and I'll bring the stock connectors with me as well.

[T.S.Davis]

Okay, I found 18 motors to measure if I don't pull any out if boats. Some are duplicates.

I have some loose jackets too.

[Meniscus]

Mike,

I will measure some of the cans I have after oval trials this weekend. Many years ago now, I started sourcing motors, specifically for 2s setups and records. After testing with motors from nearly every manufacturer imaginable, I final resolved to winding my own motors. At present, several of my records are set using a 60mm can. However, I believe my cans measure just over the 37mm. I haven't weighed my final versions in quite some time as I've needed a little weight to prevent blowovers at higher speeds.

I guess the point is, I should still have tons of cans to measure from various manufacturers. I'll need to see if they still make quite a few of them. I loved my Lehner Basic XL until it finally let go several years ago now. I probably put 400 runs on that motor.

[Doug Smock]

I final resolved to winding my own motors.

Long time Ben.

Please start a thread and show us your tooling, process, etc. This topic has come up quite a bit lately.

Good luck this weekend.

[Shooter]

He, who is that cool dude in Doug's Avatar? Is that Mr. Allnut from the African Queen?

[Doby]

He, who is that cool dude in Doug's Avatar? Is that Mr. Allnut from the African Queen?

That's Doug in the 1920's!

[Doug Smock]

That's Doug in the 1920's!

Actually 1935. I went by Clark back then.

[Doug Smock]

That's Doug in the 1920's!

Actually 1935. I went by Clark back then.

[Meniscus]

Long time Ben.

Please start a thread and show us your tooling, process, etc. This topic has come up quite a bit lately.

Good luck this weekend.

I'll see if I can find some pictures from the last time I did it which would have been over 2 years ago. Switched phones since then and I don't know where the pictures are. They were mainly reference pictures for myself, as far as I can remember, so I don't know how meaningful they will be for others. I'll definitely document the next time I do it, but I have have several motors for when we have a SAW event again. Not sure they will be helpful for others here on the forum. I typically run slotted motors and I know everyone is in love with slotless!

I will say that unless you have the time and patience, it really isn't worth it for most boaters. With motor prices dropping and so many reliable designs out there now, I would tell most folks to choose a motor with appropriate kv for their application and spend more time on the water refining your setups.

That said, if someone is interested in doing special winds for small outrunners, there's lots of videos out there on YouTube for that stuff. All I can say is carefully choose your wire for the outrunners running in boats. Don't expect but so much current to go through them. They are great for micros, but not as successful for larger models without spending more than you would for a conventional inrunner for boats.

Didn't read the good luck note until this afternoon. As you know, I did well this weekend and got one record, but my cat was too fast to turn properly, especially considering the size combined with the speed. It may remain a SAW boat, unless I have something up my sleeve.

[Meniscus]

OK, so I measured several motors now that I have in the shop. Many would not apply since the cans measure 37.8 diameter or so. Many of the others are no longer available.

I'm not interested in re-hashing the other thread, but I will say that there are a few specific motors out of China which should be excluded. Provided below is the reason for excluding some of these motors:

• They are 6-pole motors that have 2kw max. They can actually see closer to 2.5kw which means they can turn some really big props.
• They are slotted motors which do not mind being run too hard. With the natural characteristics of cooling of the motor design themselves, they could be compared to a non-interference IC motor since they can survive very high temps.
• The shear torque for some of the Delta winds, combined with the increased current capability, makes them an unfair advantage. (I will be happy to discuss with anyone, separate from this thread, the practical application of Delta winds, despite conventional wisdom that may be found on the web or on other threads).
• They measure less than allowable.
• Most of these motors weigh less than 200 grams without connectors.
• They come in kv up to 2450 or so, but there are some that measure higher based on differences in manufacturing.
• They are available in Wye winds, so advanced timing could mean even higher RPMs, even on larger props.
• The wires are a little wimpy, but they do sustain 120A pretty easily.
• They cost less than $50 in almost all cases.

For a little perspective, I have tested various 6-pole motors on 2s pretty extensively. Off the shelf, without special orders or winding myself, a boater can do some pretty outrageous speeds on a capable model (including monos) while still drawing lower amps than most would think. For example, on 2s, I can do passes at over 65mph while only pulling 135A, without an ultralight model or special setup, on low timing. That is for an off-the-shelf motor! As we all know, on 2s, a comparable setup is A LOT more amps.

For various reasons, I have chosen not to identify the make or model of these motors here. There's no reason to further complicate the discussions by introducing yet another way for someone to bend the rules, whatever they may end-up being. If there is an interested party (IMPBA or NAMBA named national director or similar), then please feel free to contact me and I can provide the info necessary to review.

I'm sorry I couldn't find other motors in the shop that conform to the specs and are still in production.

[Steven Vaccaro]

• They are 6-pole motors that have 2kw max. They can actually see closer to 2.5kw which means they can turn some really big props.
• They are slotted motors which do not mind being run too hard. With the natural characteristics of cooling of the motor design themselves, they could be compared to a non-interference IC motor since they can survive very high temps.

For those interested. Its a few pages. But interesting.

https://www.techbriefs.com/component/content/article/moco/features/22932?start=1

[Meniscus]

Thank you Steven. Obviously, there are many, many variables. I should have provided a little more info for those that are not familiar.

I will say I love slotless over slotted, but when current capacity is a factor, I typically run slotted on lower voltage setups. Then again, I typically only run at full throttle and do not run partial throttle like many of the sport boaters on the forum.

It is important to mention one word of caution. Slotted motors can be very hard on ESCs, especially as the pole count is increased to a 6-pole. That said, please do not think that you can take a cheap ESC and use it with a larger, 6-pole slotted motor (not an outrunner). It can be done, but the ESC will get very hot if it can't efficiently deliver the necessary pulses. All other advice should be followed such as starting with a smaller prop and work your way up while measuring temps and monitoring amps.

As many boaters will admit, there is no magic motor. The deciding factor is the reliability you get from the motor verses your outlay of cash. If you are made of money, I have some projects that could use contributions! For the record, no contributions are being accepted at this time, unless you have a 'magic prop'!

Getting back to topic, I'll go back through my notes when I scoured the world for motors to see if there are others that would fall within the specs discussed. I'm sure we can enlist the help from some of the folks on the other side of the pond to measure and weigh the motors.

[Meniscus]

Please do not forget this link. It has tons of motor data, including exotics, that may not be found through typical searches. Some info is older and have dead links.

http://www.progressiverc.com/media/productresearch/Brushless_Motor.html

[Doug Smock]

For those interested. Its a few pages. But interesting.

https://www.techbriefs.com/component.../22932?start=1

Good stuff boss.