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Old 05-02-2007, 07:27 AM   #1201
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Quote:
Originally Posted by John Stranahan
The only trouble the Mamba had was starting from a dead stop. I saw the car actually move backwards a bit once. Once it stuttered and then started. I don't really think this is a drawback as it corrects itself so fast (milliseconds). You only should be stopped once at the start of the main if you use Ifmar starts.
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Maybe this is as the Mamba motors and Mamba ESC are adjusted for working together and using a different motor is causing some small problems. I think this maybe have to do with timing or inadequate timing. I think going from sensored to sensorless could need adjusting in this area depending on motor or ESC brand. I know there are differences.

Regarding the bearings I heard more than once the high rev motors are causing bearing failure. You could see this also often at last years TC European champs where the motor guys had to change bearings (and bonded rotors). I never have seen a full ceramic bearing in use for modelcars, I think itīs just too expensive and will break even sooner.
Some motors as the newer LRP X11 are using larger bearing with inner diameter 4,76mm not 5mm.

John
as you have experience with both the GTB and the Sphere Comp what do you think are the differences ontrack and regarding programming?
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Old 05-02-2007, 07:37 AM   #1202
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Originally Posted by Pro ten Holland
I used a screw and nut (and some washers to spread the load) to gently push it in..
This always worked for brushed motor bearings.
I think Much More and Robitronic are making a tool what is perfect for removing/ pushing in the motor bearings. I have one from Kyosho what is about 20 years old, donīt know if they are still selling it.
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Old 05-02-2007, 11:33 AM   #1203
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Thanks for the posts. The programming of both the sphere comp and GTB were flawless as far as car performance on the track goes. The Sphere comp worked very well and for a long time with a Novak 4.5R. The 3.5 R was too much for it. I notice a new TC spec Sphere comp will soon be available that is more rugged. As far as the starting problem, I have suspicion most people don't notice these little things. It was plainly evident on the bench, even, with both a sensorless and sensored motor on the Mamba Max.

I have a report on full ceramics on the rear axle. The race cracked. Too much impact loading for it.
John

Last edited by John Stranahan; 05-02-2007 at 06:31 PM.
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Old 05-02-2007, 06:36 PM   #1204
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I have 16 runs now in four session on the $1.00 Avid bearing 3/16 x1/2. Now this is actually good service already as I would have used up two brushed motor arms on my track in this many runs. I'll try one more session. My oiling procedure is to clean around the bearing with a Q-tip then put on a little flood of oil around the inner race. This seems to be working a little better than lightly oiling the bearing. It keeps some oil coming out of the bearing during use. Car, Mamba Max, Novak 3.5R all worked well today.

I will change it before the next race and inspect this one internally. I plan to order a rubber sealed bearing eventually.
John
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Old 05-02-2007, 08:00 PM   #1205
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mathijs, are those bodies still available? are there any links to places that sell them?
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Old 05-02-2007, 10:23 PM   #1206
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Yes, contact this shop:
http://www.pancarworld.de/
Give them my regards.
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Old 05-03-2007, 01:14 AM   #1207
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John,

Speed Passion, who seems to be the OEM for -many- brushless motors, appears to have a 2.5T motor either in the works, or available. These are the guys that supposedly make Orion, LRP, GM, etc. brushless motors. They also have a removable sensor wire to save a little weight if you run them sensorless.

Here's a review of the 3.5T done recently. I can't imagine what a 2.5 would be like.
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Old 05-03-2007, 01:25 AM   #1208
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Syndrome- Thanks for the link.
Well I can imagine what a 3.0 turn Y wind is like. The Trinity N60. I did not have a low enough gear to run it. It was very soft overgeared at 96/12 in my pan car. I imagine a 2.5 turn would just be worse as far as trying to gear it correctly. That Speed Passion motor shares some similarities with the Trinity motor. The rotor is similar the solder tabs are similar. That brass spacer is the same. I wonder if it is a slotless (coreless or stackless) design like the trinity where the wire is not wound onto some induction multiplying steel. This seems to give rise to a lack of punch or this might be just the lack of low enough gears. I believe Roar rules require slots at the moment not that this is very important to me. I still think the way to go is 4S LiPo with about a 6.5 motor to reduce temperatures. No tekin yet. I dropped my backorder in frustration.

John

Be sure and Check out the Lemans Series Pics that Mathijs posted a link to on the Previous page. Lots of nice 1/10 pans.
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Old 05-03-2007, 01:33 AM   #1209
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I believe SpeedPassion is the OEM for Trinity's motors, which would explain the similarities, especially in the rotor design. I'm not certain how SP's sensorless design varies from their sensored motors. If you've already had trouble, though, it's probably not worth pondering too much.
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Old 05-04-2007, 10:34 PM   #1210
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Two new batts for the race Sunday. I should have no dumping problem. New front Springs. .063" spring wire diameter by 1/2 inch OD fit this RC18T front shock. The wheel rate (spring rate at the wheel) is now equivalent to the old prototype that runs .049" spring wire diameter Red VCS micro shock springs.
I am running Aluminum top arms plus plastic lower arms for the most rugged setup with these Losi Mini T arms.

I used this large Kimbrough servo saver which has greater spacing between the inner steering link ball studs than the Large White Kimbrough Servo saver (with narrow end) to make a small change to the Ackerman.
John
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Pantoura, 1/10 Pan Car, 2S LiPo, Brushless, Tips and Tricks.-kimbrough-large-servo-saver-resized.jpg  
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Old 05-05-2007, 12:02 PM   #1211
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Hope it will work good for ya John.

Bought 2 Lola 200mm and one GTB body car havnt arrived yet, but it will prop ome this week
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Old 05-05-2007, 12:43 PM   #1212
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CRC is not selling this car anymore. Do you know any place that has it?

Thnaks you

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Old 05-05-2007, 02:17 PM   #1213
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Quote:
Originally Posted by John Stranahan
Thanks for the posts. The programming of both the sphere comp and GTB were flawless as far as car performance on the track goes. The Sphere comp worked very well and for a long time with a Novak 4.5R. The 3.5 R was too much for it. I notice a new TC spec Sphere comp will soon be available that is more rugged. As far as the starting problem, I have suspicion most people don't notice these little things. It was plainly evident on the bench, even, with both a sensorless and sensored motor on the Mamba Max.

I have a report on full ceramics on the rear axle. The race cracked. Too much impact loading for it.
John
Acourding to LRP for the TC edition's brushless motor limit is over 3 turns. Now I'm not sure if they are trying to be sneaky and say that it can handle a 3.5 motor because it is above 3 or if it's a typo and like the Shere Comp can only handle down to a 4.5 or what.. Just thought I would let you know.
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Old 05-05-2007, 02:42 PM   #1214
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Thomas-nice body. Exciting times.

Toughbear-as far as I know CRC is still selling the Pantoura but it is temporarily out of stock. Here is a note from their show product page. I don't know of another source for the car.

"TEMPORARILY OUT OF PRODUCTION - We still have parts in stock, and the car is NOT discontinued. We are just temporarily unable to complete kits. Any new orders placed will be held on backorder until available."

This thread has made them a little more popular anyway. They were out of stock soon after it started and then they resupplied. They must be out again. If you have an e-mail response or other info please tell us.

Eric-Thanks for the note. I would assume that it can handle the 3.5 now as that was the deficiency with the older model.

John
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Old 05-05-2007, 04:31 PM   #1215
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I would definately like to get one to run on the asphalt track here. they allow to place orders but they dont give any info so it looked sketchy to me.

CRC seems to be hybernating at the moment.... I love their contact emails...
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