RCCrawler Forums

2500hdon37s · 11-09-2010, 02:54 PM

me rikey rots! we do locals get test prototypes??

id like to have one for an scx-10 sittin here, and see how one does in a LCC??

EeePee · 11-09-2010, 03:47 PM

Quote:

Originally Posted by JohnRobHolmes

550 size-
9 ounces

Makes me do this!

JohnRobHolmes · 11-09-2010, 05:30 PM

I may be able to shave a bit of weight down, but not much. There is a LOT of copper, steel, and magnet material in these.

Getting some pics of these mounted in a rig is on the agenda for tomorrow. The 550 diameter is a bit larger than it will be for production, the same size as the old crawlmasters actually.

losikid · 11-09-2010, 05:36 PM

Quote:

Originally Posted by JohnRobHolmes

I may be able to shave a bit of weight down, but not much. There is a LOT of copper, steel, and magnet material in these.

Getting some pics of these mounted in a rig is on the agenda for tomorrow. The 550 diameter is a bit larger than it will be for production, the same size as the old crawlmasters actually.

we need some vids of these breaking stuff. Or at least some numbers comparing the torque from these and other motors

Rootar · 11-09-2010, 06:46 PM

Quote:

Originally Posted by JohnRobHolmes

Just had to chuckle at this. I wouldn't waste my time developing a 500 class motor with such a small rotor, that is 400 class diameter IMO. You can thank Novak for that

i was talking about the moa sized motors and you listed the 454 size version to have 13mm rotors so whats so funny? i was mistaken with the way you size your motors, Ive only dealt with Neu for the past 5 years and i assumed the you would build a 14 series size motor i was hoping that it would be the same can as your 550 but much shorter, since we dont need the torqe of a 50mm long motor. so a 36mm diameter (14 series size) with a 14-15mm 4-pole rotor thats say 45mm or less in total length

and the wires exiting the back of the can really doesn't help with link and shock clearance (the reason we need shorter motors to beign with.)

rockhopperz · 11-10-2010, 01:01 AM

Quote:

Originally Posted by fa1rch1ld

Good to know.

Was just not sure if these bad boys had the power to keep spinning if scraping
and getting damaged by the rocks...

Thanks for the info.

hahaha I read the whole thread and this guy never once catches the fact that these are NOT an outrunner LOL, not to mention the pics in the 2nd post

funny guy!!!!!

anyhoo, I cant wait for these man, great work!! I run one of your old "CrawlMasters 3014" "OUTRUNNER" in my scale scx10 JK at 10 pounds and LOVE it to death!! soooo smooth! cant imagine how smooth these will be with a good esc!!

BUT IM IN and want one!!! you should hurry on that esc too

thnx HH for your killer "Stuff"

rockhopperz · 11-10-2010, 01:08 AM

Quote:

Originally Posted by Grizzly4x4

Gonna get my MMP ordered soon here. Bring on that 550 baby!!

haha ya perfect for your INSANE dual monster battery rigs that weigh as much as a 1:1

cant wait to see if you run this at MSD!!!!!!!

JohnRobHolmes · 11-10-2010, 05:42 AM

Rootar- my mistake. Those are great suggestions.

Grizzly4x4 · 11-10-2010, 09:22 AM

Quote:

Originally Posted by rockhopperz

haha ya perfect for your INSANE dual monster battery rigs that weigh as much as a 1:1

cant wait to see if you run this at MSD!!!!!!!

Thats exactly right.

You can count on it being at MSD Nats in at least one rig.

Tryker46 · 11-12-2010, 07:47 AM

What are your reccomendations for batterys on these things JRH? ( number of cells)

JohnRobHolmes · 11-12-2010, 07:50 AM

With the current design and KV of the Pro Puller, 2s to 6s lipo.

Tryker46 · 11-12-2010, 07:55 AM

Awesome, thanks for making more great products!

Nabil · 11-12-2010, 10:22 AM

Is this the revision to the one I have? everyone who has seen that motor run in my losi is in awe

SlickRockSpider · 11-12-2010, 10:43 AM

Wow 1600 watts @ (volts ?)

Is that continuous ? How many watts was the old style pullers rated at. What about cooling. In tight places over heating is a problem. A sealed motor with that much wattage. How can you keep it cool @ 1600 watts ?

Thanks John for doing the research on all of this. Very cool.

Evan

4xFord · 11-12-2010, 11:46 AM

Do you know what kv range you are shooting for on all 3 sizes?

JohnRobHolmes · 11-12-2010, 12:06 PM

Quote:

Originally Posted by e-hills4x4

Is this the revision to the one I have? everyone who has seen that motor run in my losi is in awe

Your's is quite different, actually just a fairly standard build similar to a Roar motor. Got any other feedback for me on those?

Quote:

Originally Posted by SlickRockSpider

Wow 1600 watts @ (volts ?)

Is that continuous ? How many watts was the old style pullers rated at. What about cooling. In tight places over heating is a problem. A sealed motor with that much wattage. How can you keep it cool @ 1600 watts ?

Thanks John for doing the research on all of this. Very cool.

Evan

The old pullers were rated around 350w continuous and 500w burst. The voltage to get 1600w will depend heavily on gearing and vehicle weight. Lighter rigs won't even pull that much power.

Cooling won't be an issue, the motor should peak at 91% efficiency.

Quote:

Originally Posted by 4xFord

Do you know what kv range you are shooting for on all 3 sizes?

2000kv will start the product line

Rootar · 11-12-2010, 02:29 PM

have you given any more thought to a stubby version of that 550? say with a 19d x 15mm L rotor so you could shave 8mm off the length right there and with a little tightening up of teh sensor area i dont see why you couldnt scrounge an extra 4-5 mm there and then youd would be down in the 45mm long and under category which would be SOOO sweet.

i see the 454 motor is 48mm long but once you include the adapter plate and wires out the end you back past 50mm longer and even 50mm is tight for alot of rigs.

what about the specs on the 400 motors how are those looking?

JohnRobHolmes · 11-12-2010, 05:17 PM

That includes the adapter plate on measures.

The stubby 520 will come, but if you really want short with torque an outrunner makes a good candidate. I am working to stuff this all shorter, there is some airspace in them still.

Excellent feedback guys, keep it coming. I'm busting ass to get them done by December.

losikid · 11-12-2010, 05:23 PM

Quote:

Originally Posted by JohnRobHolmes

Your's is quite different, actually just a fairly standard build similar to a Roar motor. Got any other feedback for me on those?

The old pullers were rated around 350w continuous and 500w burst. The voltage to get 1600w will depend heavily on gearing and vehicle weight. Lighter rigs won't even pull that much power.

Cooling won't be an issue, the motor should peak at 91% efficiency.

2000kv will start the product line

Ok so wattage is proportional to torque or speed? Also i'm not huge on brushless but how does kv relate to the power a motor has. Next thing that comes to mind is how much amps are each one of these motors gonna pull?

JohnRobHolmes · 11-12-2010, 05:40 PM

Tough questions, I will need to prepare a bit for them

The amperage it CAN pull could be ridiculous at 6s (80 to 100 amp bursts), but then you would be dealing with almost 50k in motor speed and enough torque to just shred 1/10th scale crawler parts. On 2s it will be very manageable otherwise. Full disclaimer, I haven't had a chance to data log it in use yet so I am flying by the seat of my pants on HOW the power can be tapped out. 40mph 1/8th scale top truck?

11-12-2010, 07:47 AM	#70
Tryker46 Rock Stacker Join Date: Jan 2008 Location: Riverside Posts: 55	What are your reccomendations for batterys on these things JRH? ( number of cells) Last edited by Tryker46; 11-12-2010 at 07:49 AM.

11-09-2010, 02:54 PM	#61
2500hdon37s I wanna be Dave Join Date: Mar 2009 Location: sittin in the sky Posts: 4,630	me rikey rots! we do locals get test prototypes?? id like to have one for an scx-10 sittin here, and see how one does in a LCC??

11-09-2010, 05:30 PM	#63
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	I may be able to shave a bit of weight down, but not much. There is a LOT of copper, steel, and magnet material in these. Getting some pics of these mounted in a rig is on the agenda for tomorrow. The 550 diameter is a bit larger than it will be for production, the same size as the old crawlmasters actually.

11-10-2010, 05:42 AM	#68
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Rootar- my mistake. Those are great suggestions.

11-12-2010, 07:50 AM	#71
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	With the current design and KV of the Pro Puller, 2s to 6s lipo.

11-12-2010, 07:55 AM	#72
Tryker46 Rock Stacker Join Date: Jan 2008 Location: Riverside Posts: 55	Awesome, thanks for making more great products!

11-12-2010, 10:22 AM	#73
Nabil no talent hack Join Date: Feb 2007 Location: Redwood City Posts: 2,479	Is this the revision to the one I have? everyone who has seen that motor run in my losi is in awe

11-12-2010, 10:43 AM	#74
SlickRockSpider Rock Crawler Join Date: Apr 2008 Location: Albany Posts: 640	Wow 1600 watts @ (volts ?) Is that continuous ? How many watts was the old style pullers rated at. What about cooling. In tight places over heating is a problem. A sealed motor with that much wattage. How can you keep it cool @ 1600 watts ? Thanks John for doing the research on all of this. Very cool. Evan

11-12-2010, 11:46 AM	#75
4xFord I wanna be Dave Join Date: Oct 2007 Location: Houston Posts: 3,761	Do you know what kv range you are shooting for on all 3 sizes?

11-12-2010, 02:29 PM	#77
Rootar Rock Crawler Join Date: Sep 2010 Location: Little Rock, AR Posts: 596	have you given any more thought to a stubby version of that 550? say with a 19d x 15mm L rotor so you could shave 8mm off the length right there and with a little tightening up of teh sensor area i dont see why you couldnt scrounge an extra 4-5 mm there and then youd would be down in the 45mm long and under category which would be SOOO sweet. i see the 454 motor is 48mm long but once you include the adapter plate and wires out the end you back past 50mm longer and even 50mm is tight for alot of rigs. what about the specs on the 400 motors how are those looking?

11-12-2010, 05:17 PM	#78
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	That includes the adapter plate on measures. The stubby 520 will come, but if you really want short with torque an outrunner makes a good candidate. I am working to stuff this all shorter, there is some airspace in them still. Excellent feedback guys, keep it coming. I'm busting ass to get them done by December.

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11-12-2010, 05:40 PM	#80
JohnRobHolmes owner, Holmes Hobbies LLC Join Date: Nov 2004 Location: Volt up! Gear down! Posts: 20,290	Tough questions, I will need to prepare a bit for them The amperage it CAN pull could be ridiculous at 6s (80 to 100 amp bursts), but then you would be dealing with almost 50k in motor speed and enough torque to just shred 1/10th scale crawler parts. On 2s it will be very manageable otherwise. Full disclaimer, I haven't had a chance to data log it in use yet so I am flying by the seat of my pants on HOW the power can be tapped out. 40mph 1/8th scale top truck?

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Thread: Puller Pro tech thread