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Old 08-04-2006, 03:00 PM   #226
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Yeah, something isn't right with it saying it's in stock. They now show 6 in stock, but that's not right. They only received 3 or 4 yesterday.
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Old 08-04-2006, 07:22 PM   #227
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I figure this little idea belongs here as well as anywhere else. I have had trouble getting my 64p gear mesh set since swapping to BL motors. The old "rock the spur against the pinion" doesn't work since the BL motor doesn't provide any resistance to keep the pinion still. I tried using my finger to hold the pinion, but the little amount of pressure required to hold the pinion still also moves the pinion up against the spur making my effort pointless.

So I have a tip.

Hold the spur still by holding something directly attached to the spur (usually a belt or shaft). That way the spur doesn't move, but you are not messing with the spur's position.

Just an FYI for anyone else having the same issue as I was.
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Old 08-04-2006, 08:45 PM   #228
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Sweet, I think it's on its way.
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Old 08-05-2006, 02:55 PM   #229
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anyone who knows if there comming a 19t brushless?
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Old 08-05-2006, 03:37 PM   #230
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Quote:
Originally Posted by EnÍ_Design
anyone who knows if there comming a 19t brushless?
novak 5800 is very close with the 19t, my local track has been running them together and they are very close in lap times
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Old 08-05-2006, 07:56 PM   #231
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Quote:
Originally Posted by Marcos.J
novak 5800 is very close with the 19t, my local track has been running them together and they are very close in lap times
The 5800 is faster than a 19T when you can keep it cool enough to gear it up. Sintered rotors may be legal for next year and this will eliminate motor heat as an issue. With a sintered rotor a 5800 is definatly faster than a 19T

Novak is currently testing a 9.5T that will be more equal to a 19T than the current 5800.
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Old 08-05-2006, 09:58 PM   #232
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so im pretty new to the world of rc and its technology, but what are sintered rotors and how does it mostly eliminate motor heat?
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Old 08-06-2006, 01:40 PM   #233
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Quote:
Originally Posted by SSJChar
so im pretty new to the world of rc and its technology, but what are sintered rotors and how does it mostly eliminate motor heat?
Current BL motors use a bonded rotor, magnetic particles in a thermoset resin cast into shape. The limiting factors with bonded rotors are temperature and RPM. They become damaged and lose power if run at high temperatures (over 190 deg F) for extended periods. At high RPM centrifugal forces and thier resulting shaft harmonics can make the rotors fragment.

Sintered rotors are magnetic particles mixed with a metallic ceramic powder and fused (sintered) together under tremendous temperatures. These magnets are safe to run up to over 250 deg F and they are way stronger. As a results we can gear higher and run at higher rpm with much less risk of damaging a rotor.
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Old 08-06-2006, 02:19 PM   #234
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ahh i see. thanks for the explaination. are sintered rotors available as an upgrade for any of the brushless motors out right now?
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Old 08-06-2006, 02:27 PM   #235
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Quote:
Originally Posted by AdrianM
Novak is currently testing a 9.5T that will be more equal to a 19T than the current 5800.
Hey, sweet, I predicted this a couple of months ago. My next prediction is an updated 4300 and 5800, and getting all their brushless motors in line with the new endbell, solder tabs and possibly the sintered rotor down the road.

A lot of people are saying the 5800 is like a 19T, but I run with some pretty capable drivers (and tuners) on our small carpet track, and I can definitely make the 5800 faster than their nicely tuned KD's. Maybe it's track dependent or something, but the 5800 rips WAY more than any 19T I've used, and it's got an edge in top speed too.

With the 9.5 supposedly on its way, here's the lay of the land for sensored brushless motors:

Novak Brushless
3.5R (3.5 turns)
4.5R (4.5 turns)
5.5R (5.5 turns)
6.5R (6.5 turns)
7.5R (7.5 turns)
5800 (8.5 turns)
9.5R (9.5 turns) [rumored, not yet available]
4300 (10.5 turns)
SS13.5 (13.5 turns)
Crawler 18.5 (18.5 turns)

Reedy Brushless
5-Star (4.5 turns?) [rumored, not yet available]
4-Star (5.5 turns)
3-Star (6.5 turns)
2-Star (7.5 turns)
1-Star (8.5 turns)

Reedy is getting seriously whipped in the BL motor category by a relative newcomer to the motor world.
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Old 08-06-2006, 02:30 PM   #236
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Quote:
Originally Posted by AdrianM
Sintered rotors may be legal for next year and this will eliminate motor heat as an issue.
Do you think sintered magnets will also be made legal in brushed motors? Would they help reduce the need for zapping magnets, and reduce the effects of heat on the magnets? Isn't the heat (and reduced magnetization) the reason brushed motors tend to slow as a race goes on? If so, why wouldn't this have been made legal a long time ago? Fear of making existing motors obsolete?
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Old 08-06-2006, 02:32 PM   #237
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Quote:
Originally Posted by syndr0me

Novak Brushless
3.5R (3.5 turns)
4.5R (4.5 turns)
5.5R (5.5 turns)
6.5R (6.5 turns)
7.5R (7.5 turns)
5800 (8.5 turns)
9.5R (9.5 turns) [rumored, not yet available]
4300 (10.5 turns)
SS13.5 (13.5 turns)
Crawler 18.5 (18.5 turns)

.
People can see that the 3.5 is a 3.5 turn, what people are looking for is the equivelant to brushed motors. There is going to be new people coming on ths thread and asking it over and over and over..
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Old 08-06-2006, 02:48 PM   #238
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Quote:
Originally Posted by BSchorr
People can see that the 3.5 is a 3.5 turn, what people are looking for is the equivelant to brushed motors. There is going to be new people coming on ths thread and asking it over and over and over..
Good point! You guys want to help me make an equivalency chart? Fill in the blanks or correct as necessary, and we can create a brushless motor FAQ thread and direct newbs to it. Sound like a plan?


3.5R - Comparable to a 6T brushed motor. This is the fastest sensored brushless motor commonly used in R/C. It ships with the new "sintered" rotor which currently makes it illegal under ROAR rules for modified racing.

4.5R - Similar to a 7T brushed motor. Legal for modified racing under ROAR rules.

5.5R - Similar to a 10T brushed motor. Legal for modified racing under ROAR rules.

6.5R - Similar to a 11-12T brushed motor. Legal for modified racing under ROAR rules.

7.5R - Similar to a 13-14 brushed motor. Legal for modified racing under ROAR rules.

SS5800 (8.5R) - Similar to a 19T in performance, if not slightly faster, and with more acceleration. Currently ships with the old styled rotor and endbell which can be updated with Novak's upgrade kit. The upgrade kit generally gives the motor more torque and slightly less top speed.

9.5R - Rumored, not yet available. This motor is expected to perform very similarly to a 19T brushed motor.

SS4300 (10.5R) - Between a 27T stock and 19T in performance, with significantly more torque than a stock motor, and slightly better top speed. Currently ships with the old styled rotor and endbell which can be updated with Novak's upgrade kit. The upgrade kit generally gives the motor more torque and slightly less top speed.

SS13.5 - Designed to perform just like a 27T stock motor. Initial testing indicates that it's extremely competitive with today's hot stock motors.

Crawler 18.5 - Slower brushless motor designed with low-speed applications (such as crawling) in mind.

Last edited by syndr0me; 08-06-2006 at 04:09 PM.
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Old 08-06-2006, 03:24 PM   #239
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5.5R - 10 turn

6.5R - 11-12 turn

7.5R - 13-14 turn

I got a quick question, Does the GTB ESC fit in the XXX-CR Buggy with the body on? Wonder if you could take off the fan.. I would really like to know from personaly experience from peoples
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Old 08-06-2006, 04:34 PM   #240
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So, if the sintered rotors are more resistant to heat damage, will we see motors with a higher cutoff temperature before they thermal, or more people cutting the sensor wires? If these rotors are legalized, hopefully they include some verbiage about not cutting sensor wires, and a standardized cutoff temperature.
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