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Search: Posts Made By: kufman
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04-15-2022, 02:56 PM
Replies: 1,642
Views: 456,448
Posted By kufman

Speaking of my obsolete battery tab system, here...

Speaking of my obsolete battery tab system, here are a couple pics. Don't ever have to mess with the screws since the rubber grommets give the tab some resistance to motion. When you turn the tabs,...
04-15-2022, 11:33 AM
Replies: 1,406
Views: 341,685
Posted By kufman

Pretty cool video. Looks like a 5.5 is a bit too...

Pretty cool video. Looks like a 5.5 is a bit too much for the available traction at that facility.
04-14-2022, 10:45 AM
Replies: 1,642
Views: 456,448
Posted By kufman

I agree with your assessment but I do look...

I agree with your assessment but I do look forward to getting a factory built battery holding system that doesn't suck! I built my own a while back but it is always nice to have a stock part that is...
04-14-2022, 10:12 AM
Replies: 376
Views: 48,534
Posted By kufman

Thanks for doing all the work and posting these...

Thanks for doing all the work and posting these videos!
03-29-2022, 10:04 AM
Replies: 1,642
Views: 456,448
Posted By kufman

I know what you mean about not wanting to get the...

I know what you mean about not wanting to get the polarity mixed up. It is the unfortunate result of how batteries are made now days.

The article you linked is very similar to the problem we...
03-28-2022, 10:37 AM
Replies: 1,642
Views: 456,448
Posted By kufman

Cool build but I have one suggestion (kind of...

Cool build but I have one suggestion (kind of late I know). It is nicer to the ESC if the positive and negative battery wires are run together to help reduce the stray inductance. This isn't as big...
03-28-2022, 10:28 AM
Replies: 15,950
Views: 2,178,500
Posted By kufman

I use velcro on my TC3 but it has an IRS carbon...

I use velcro on my TC3 but it has an IRS carbon chassis on it. I also use velcro on my XXX-4 and haven't had any issues.
03-28-2022, 10:15 AM
Replies: 15,950
Views: 2,178,500
Posted By kufman

The battery hold down causes chassis tweak...

The battery hold down causes chassis tweak issues. I would recommend using tape instead.
02-24-2022, 12:13 PM
Replies: 40
Views: 5,971
Posted By kufman

Ya, I tried this layout 10 years ago with my...

Ya, I tried this layout 10 years ago with my original RC8. I can't say it drove very well. The Tekno V4 conversion was the best for that car. Saddle configurations do some bad things for weight...
11-16-2021, 10:38 AM
Replies: 1,642
Views: 456,448
Posted By kufman

That is because Losi didn't make a dedicated...

That is because Losi didn't make a dedicated front gear box so the front drive shaft has a bit of angle on it to account for the height mismatch between the input of the gearbox and the spur gear...
07-05-2021, 11:19 AM
Replies: 1,642
Views: 456,448
Posted By kufman

Has anyone tried incorporating a servo saver into...

Has anyone tried incorporating a servo saver into their 22X4 build?
06-08-2021, 05:49 PM
Replies: 165
Views: 33,733
Posted By kufman

Losi's front offset may still be different. I am...

Losi's front offset may still be different. I am not sure.
05-18-2021, 02:07 PM
Replies: 513
Views: 150,591
Posted By kufman

The problem with bulbs of any kind is that they...

The problem with bulbs of any kind is that they change resistance dramatically depending on the voltage across them (it is really the temperature of the filament but I will leave it at voltage for...
05-18-2021, 02:04 PM
Replies: 513
Views: 150,591
Posted By kufman

Yup, in most cases this is true. Here is a...

Yup, in most cases this is true. Here is a datasheet for a generic LED that shows a 5V reverse voltage tolerance.

https://www.aopled.com/AOP_PDFs/L513SRD-A.pdf
05-14-2021, 04:01 PM
Replies: 513
Views: 150,591
Posted By kufman

You could but you would need to put a protection...

You could but you would need to put a protection diode in series with each LED. The forward drop of one LED might be too much for the other to handle in reverse. I will look at some data sheets and...
05-14-2021, 02:27 PM
Replies: 513
Views: 150,591
Posted By kufman

Yes, the 2nd diode is just to protect the LED...

Yes, the 2nd diode is just to protect the LED from reverse current. Yes, 520 would be correct for a slightly higher voltage. It depends on the exact LED you use as well. I assumed a 1.4V forward...
05-14-2021, 11:17 AM
Replies: 513
Views: 150,591
Posted By kufman

You could put an LED with a series resistor right...

You could put an LED with a series resistor right across the 0.2ohm resistor. 0.01A through the diode is what you are looking for. 30A*0.2ohm=6V 6V-1.4V/0.01A = 460 Ohms. You might want a reverse...
05-10-2021, 07:20 AM
Replies: 136
Views: 11,832
Posted By kufman

Yes, for his application the Deans are a bit...

Yes, for his application the Deans are a bit small so there aren't too many choices. That being said, I have used Deans plugs on 1/8th buggies for over a decade with no problems. But.... you have to...
05-10-2021, 06:30 AM
Replies: 136
Views: 11,832
Posted By kufman

The Castle 6.5's are probably the best you can do...

The Castle 6.5's are probably the best you can do with the current selection of connectors. Just be sure that they are a tight fit each time you use them. This is why it is better to use individual...
05-10-2021, 06:26 AM
Replies: 136
Views: 11,832
Posted By kufman

How many times were they cycled for the test?

How many times were they cycled for the test?
05-09-2021, 05:41 PM
Replies: 136
Views: 11,832
Posted By kufman

That is the problem, the conductor itself acts as...

That is the problem, the conductor itself acts as a spring which requires it to be made of something springy. Springy materials are not great conductors and will therefore heat up at higher...
05-09-2021, 10:55 AM
Replies: 136
Views: 11,832
Posted By kufman

Yes, something that applies force to the contacts...

Yes, something that applies force to the contacts and isn't part of the current path would be a good idea. I know the connector you are talking about for the sensor wires and I believe they do it as...
05-09-2021, 09:40 AM
Replies: 136
Views: 11,832
Posted By kufman

Yup! If a battery companies provided...

Yup!



If a battery companies provided solder tabs, the pros would ditch their connectors in a heartbeat. Guaranteed.

You can live in your dream world thinking that motors are DC. All...
05-09-2021, 09:30 AM
Replies: 136
Views: 11,832
Posted By kufman

If there is a good connection with good quality...

If there is a good connection with good quality materials, there will be no heat to absorb. Bullets have "springs" in them too but it is part of the contact.

Battery companies do it because it...
05-09-2021, 08:50 AM
Replies: 136
Views: 11,832
Posted By kufman

Yes, springs with current in them are a bad idea....

Yes, springs with current in them are a bad idea. Springs that push current carrying conductors together but don't conduct themselves are good.

As I said above, hardwiring motors wires is best...
Showing results 1 to 25 of 500
 


 
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