High power RC motor and drive unit production

[swbluto]

Using 60 as a reference, you get the power difference between 66 and 60 to be (66/60)^3 = 1.331.

15273 / 1.331 = 11473 watts at 60 mph.

That means, you still have a left over 3-4 kW (Using the 15 kw) left for acceleration, and significantly more than that available at lower speeds. I don't know about you, but a 4+kW system seems to accelerate briskly(From a power/weight ratio perspective) and that's at 60 - At 45 mph, you likely have 8+ kW going towards acceleration.

It's really amazing at how fast power demands accumulate at higher speeds. An extra 5 mph may easily demand 3+ more kW above 60.

 

[recumpence]

I don't know about you, but a 4+kW system seems to accelerate quite briskly.

It's really amazing at how fast power demands accumulate at higher speeds. An extra 5 mph may easily demand 3+ more kW above 60.

No kidding. It is shocking how a system that freakin RIPS geared for 35mph really begins to bog if geared for 45. I have also seen systems geared for 40mph seem tame, then really accellerate HARD when geared for 50. Much of that is related to the motor characteristics and the controller, though.

Matt

 

[Doctorbass]

Dont forget: 8-10kW for 66mph with the limit that was.. THE END OF THE ROAD!! not the speed limit.. but i agree i could have done 67-68 no more with that power ( i had 60A rated current.. so probably then with higer current i could still continu!

The no load speed of teh wheel is atill near 170KMH

I have to remind you that it was acheived with: the WIDE BITE 24 x 3.0" motocross style tire not some 2.25 or 1.95" slick tires !!!

The motor heat from ambiant to 110 celsius at the end of the top speed so i can still dump power into it.. until i REALLY reach the TOTAL saturation

i WOULD REALLY APPRECIATE REACHING THE 88mph

How much high frequency noise these RC motor would make at 66mph?

Doc

 

[recumpence]

How much high frequency noise these RC motor would make at 66mph?

Doc

Almost none.

After beating the crap out of my trike (smokey burnouts and drag race launches) for several minutes my motors were still under 130 degrees F.

Matt

 

[Ypedal]

My poor little 3210 gets up to 180f after a ride home from work !!! :lol:

at what temps do hall sensors fail ? this is the next step for me at this point.

 

[swbluto]

How much high frequency noise these RC motor would make at 66mph?

Doc

Almost none.

After beating the crap out of my trike (smokey burnouts and drag race launches) for several minutes my motors were still under 130 degrees F.

Matt

On my belt drive system, it's pretty amazing how quiet it is when running near the "no-load" speed. The wind and tire noise easily dominates the sound of the motor and drive system. Under partial throttle conditions, it's a little noisier though still pretty quiet.

 

[gwhy!]

My poor little 3210 gets up to 180f after a ride home from work !!! :lol:

at what temps do hall sensors fail ? this is the next step for me at this point.

upto 150c is what the spec sheet says.

 

[Doctorbass]

My poor little 3210 gets up to 180f after a ride home from work !!! :lol:

at what temps do hall sensors fail ? this is the next step for me at this point.

I often crank my X5 stator up to 160 to 180 celsius and i NEVER had any hall sensor problem on all 3 X5 hub motor i had

i guess staying below 300F seem ok for these RC

Doc

 

[mylittlepony]

Fellas,

I've been reading this thread with interest. I've been feeling the need to fit a large, cheap RC motor to some sort of vehicle for quite a while. I'd come to the conclusion that using a sensorless brushless motor and rc style ESC wouldn't work. I take it that you guys are doing just this? Do you find you need to pedal a little to get rolling before the ESC kicks in or is the gear ratio sufficiently low to pull away smoothly from a standing start without pedaling?

Cheers,
Dave

 

[Thud]

Dave. the standing start-ability is wholely dependent on your gearing set up. the more your motor is loaded the more the sensorless controllers struggle to sync. But It is working just fine for the majrity of thoses who have attempted it. Good luck & brows around...lots of good info & a variaty of set-ups to plagerise.

 

[GaryB]

man this is a long thread !! anyway a while back Matt said he would post pics of V3, I've been looking and was wondering if I missed it somehow. In the near future I'm thinking about getting a whole setup from Matt for a home built streetfox which can easily be modified while in the building stage.
Is there another thread about Matts setup or do I just need to be patient,
Thanks

 

[Beuhji]

man this is a long thread !! anyway a while back Matt said he would post pics of V3, I've been looking and was wondering if I missed it somehow. In the near future I'm thinking about getting a whole setup from Matt for a home built streetfox which can easily be modified while in the building stage.
Is there another thread about Matts setup or do I just need to be patient,
Thanks

Are you searching this thread ? :wink:

=> http://endless-sphere.com/forums/viewtopic.php?f=28&t=16741&p=244774#p244774

 

[GaryB]

That's it thanks

 

[recumpence]

Hey Guys,

I just wanted to post that I will be going out of town for vacation from this Friday (the 3rd) through the 10th. I will not have computer access. So, I will not be able to return PMs or any questions on my threads. For those who read this, I will appreciate your help spreading the word if you see someone asking me questions on my various threads during that time.

Oh, I will be working evenings at the shop trying my best to finish and ship every order I possibly can (every order I have materials for by the 3rd). So, if you have a pending order, it will ship by Thursday, assuming all materials arrive for me to complete it.

Thanks Guys!

Matt

 

[Ypedal]

Might want to edit your " Location " or " Signature " to include " Im on vacation.. don't PM me "

 

[recumpence]

Might want to edit your " Location " or " Signature " to include " Im on vacation.. don't PM me "

Hey, great idea!

Matt

 

[mwkeefer]

Matt,

Would you be able to fill an order for a few parts before you leave?

I'm in need of 1 more disc 130mm bcd adapter and out of curiosity - on the normal mounting arm with the recessed channel for tensioning the motor and the tiny plate which holds the bearings - does that get machined from the arm itself... I have one here which hasn't been machined at all (as per my request) but I am wondering now if what I should have been asking for was a few of the insert pieces since as I look over and over at it, they seem to be machined seperately for each piece.

Is this portion (the actual mount for the bearing the drive axle passes through) with either no machining or I suppose if they are available pre - machined for 9.5mm and the bearing to fit, I can adapt some.

If not I think I will be crafting some inserts with a file and pressing bearings to test various RC motors with the setup.

If you can process that this week, let me know (PM) the total and I'll pp you asap (more spending money for the weekend!)

-Mike

 

[recumpence]

The adaptor is no problem. The motor plate is. I do not have them blank like you need.

I will PM you.

Matt

 

[recumpence]

Hey Guys,

I wanted to let you know I am ramping up production. I am redesigning a few bits to make accuracy and overall quality higher. I also have some cool stuff up my sleeve. :wink:

Anyway, I am building 30 drives complete and ready for sale. I, also, have some Astro motors coming that will be in stock ready to ship.

This has been difficult to accomplish because I am filling more drive orders now than ever. However, I have been ordering more motors than my customers need and I have thought ahead and ordered more pulleys and what-not than I need to fill existing orders. So, as those parts arrive, I am assembling drives that will be ready to ship.

I will let you know when I have an inventory on hand ready to go.

Oh, keep your eyes peeled over the next month or two for some very cool developments.

Matt

 

[Miles]

.....for some very cool developments.

 

[recumpence]

Oh, I did not realize my post was the last one on page 78. Here it is again so it does not get missed;




Hey Guys,

I wanted to let you know I am ramping up production. I am redesigning a few bits to make accuracy and overall quality higher. I also have some cool stuff up my sleeve.

Anyway, I am building 30 drives complete and ready for sale. I, also, have some Astro motors coming that will be in stock ready to ship.

This has been difficult to accomplish because I am filling more drive orders now than ever. However, I have been ordering more motors than my customers need and I have thought ahead and ordered more pulleys and what-not than I need to fill existing orders. So, as those parts arrive, I am assembling drives that will be ready to ship.

I will let you know when I have an inventory on hand ready to go.

Oh, keep your eyes peeled over the next month or two for some very cool developments.

Matt




Miles,

I have some very cool stuff going on, nothing Earth shattering, but very cool non-the-less. My V4 drives are selling very well, my heat sinks are selling well, and I have some cool new stuff I am working on. I will show you guys in a month or so when I have something to show.

 

[GGoodrum]

Are there any pics of the V4 drive, and the tube clamps anywhere? I went back about 20 pages, but didn't see any. I'm trying to get an idea about what these look like, in comparison to my original v1 drive.

-- Gary

 

[ROBERTO rossi]

HI MATT
I' M ROBERTO FROM ITALY
I WANT ONLY ASK IF IT 'S READY
THE DRIVE SYSTEM PRODUCTION WITH ASTRO FLIGHT MOTOR 3220
OR WITH THE "BIG MOTOR" FOR A FULL MTB (WITH REAR SHOCK)
AND HOW MUCH ALL THE DRIVE SYSTEM KIT WITH CONTROLLER, THROTTLE,
READY TO MOUNT AND USE ?
THE DRIVE SYSTEM NEEDS OF A FREEWHEEL CRANKSET ?
PLEASE KEEP ME INFORMED ABOUT IT !
COULD YOU REPLY TO MY E-MAIL = recordoftheworld@gmail.com
THANK YOU VERY MUCH
BEST REGARDS

ROBERTO

 

[briogio]

What is your website? I'm considering an RC setup for my mid-drive, full-suspension, LWB recumbent.

You people from OZ are very innovative! :wink:

 

[www.recumbents.com]

www.recumpence.net