Brian any chance you could update the RC8 ratio to 4.3:1 (same as SC8 and RC8T)

Also any chance the new Castle Short Course motors will be on the motor list soon?

Also... updates to Tyre Size:

Short Course:

SC8 Stockers 4.49 inch

Done, done, and done.

Did several other updates at the same time...

This could be a problem with my browser, but I just went on the site and the background is updated with a really dark carbon-fiber look, but all the text is black still, so I can't really read anything.

Is it just me that's experiencing this?

EDIT: OK, it looks like the only pages that are doing this are the main page, the top speed estimator, and the speed vs. amp calc. The other pages that I tested look fine, but I didn't check all of them.

Must be your browser. Main page, top speed stimator, and speed vs amp calc all work fine in IE9, Chrome 11 and FF3.6.

Yeah, you might have to empty your internet cache. Most browsers will save copies of the page and then display that instead of what is really on the server. Chrome especially seems to have a harder time "knowing" when the page has changed.

I'm using Firefox 4.0 Beta 12, maybe that's why. I'll try clearing the cache.

EDIT: Clearing the cache fixed it. On a side note, Firefox said my cache before clearing was 1.0GB, can't believe it was that big. What do you guys set your internet cache at? I lowered it down to 256MB manually.

Probably, FF 4 has tons of problems. I'd go back to using 3, or a different browser, until it actually comes out of beta.

Most browsers have a way to clear the cache when you close the browser, or at least an easy one-click clearing method. Either way, it's a good idea to flush it occasionally.

I really don't know why browsers cache so much nowadays. Back in the 56k era, it made sense to help limit bandwidth by not downloading static content, but with today's proliferation of broadband, it hardly seems necessary.

Most of today's sites use static layout but have dynamic content populated from database queries and such. However, my site is almost all static and changed client-side, which is probably why it is more important to flush the cache.

what is the transmission ratio for the slash 4x4? i'm trying to calculate some top speeds, but i am stuck trying to figure out what to put for the transmission ratio. any help is greatly appreciated

Put 1 since there is no transmission just the diff ratio and the pinion/spur.

^ Yup.

i took a closer look at my slash 4x4 (just got it yesterday) and now i feel stupid. LOL

i didn't even notice the spur gear was directly attached to the driveshaft until i took the gear cover off of it.

thanks for the help

Wow this has come a long ways to what I remembered it.
Very nice Brian!

Thanks CHC! Although it's been almost a year since it's been updated. With all the E-RTRs out now, gearing is not nearly as much of a concern.

Well it has been probably that long since looked over here much.
But I like what you have done with the site.
I trying to get back into a few projects just not as serious as used to be.

The LED calculator (nice feature) didn't like the 300mA current of these LED's I was thinking of buying to make some homemade flashlights for my kids:

http://www.ebay.com/itm/5-PCS-10mm-4...item5adb4fdf33

Yeah, the calc has a built-in limit of 99mA. This is to prevent people from thinking "well, I'll just dump more current to make my LED brighter" which would quickly destroy their LEDs (or reduce their life drastically) and then they'd blame me :smile:. TBH, even 99mA is quite high for the typical LED used for R/C lights, which usually have values in the 25mA range.

But, at the bottom of the page ("Other Useful LED Information"), the formulas that the calc uses are listed. Just pick the right one for your application.

Additions.

Ofna DM1 & DM1E
front and rear diffs - 3.3076923076923075
Center Spur - 49t


Traxxas XO-1
front and rear diffs - 2.846
Center Spur - 46t
Stock Belted Slicks - 4.29"

Man, I'm a little disheartened by this. I have an RC8be and have been using the incorrect number for all of my gearing. I just spent an hour on google looking for anyone stating that the rc8be did not have a 4.30:1 ratio. Found one thread stating such and the guy later admitted he was wrong. (I wonder if thzero and BIG-block on another site are the same person)

All associated 1/8 thus far (rc8, rc8b, rc8be, rc8t, rc8tce, sc8, sc8e rc8.2, rc8.2e, sc8.2, sc82.) have 4.30:1 diff ratios.

Honest mistake, just hope it gets updated.

Will there be a mobileverson of this site out soon ?
The speedcalculator don't work corektly on my ipad :diablo:

iOS/OSX purposely not supported. I don't like crApple. :na:

Seriously, it should work. Haven't touched the site in a loooong time. Not nearly as much traffic as it used to have. Seems like R/C has become less popular in general, and most companies have systems pre-built so not nearly as much call for conversions and the calculations they entail.

Why is the tekin 2000 4038 listed as 2100kv?

I still use it at a regular basis :yipi:

Me too!!

And me too. :)

Me too, what about the Tekin? Is it actually a 2100kv?

Tekin has a 2000Kv and a 2250Kv truggy sized motor - not sure why it shows as 2100?

I was doing calculations for my Losi 2.0 buggy, which BTW is not supported in the f/r diff department. But I know what the ratio is.13/43. I just picked up a Tekin t8 4038 truggy 2000kv and was trying to pick out a pinion, when I noticed on the calculator that the tekin 2000kv calculates not at 2000 but at 2100. I was wondering if after some testing if BrianG or anyone else really discovered that the wind is really 2100. I used a 15t pinion and ran the buggy last night and its perfect.

Thanks for the calculator, I've been using it for years! It would be cool if the lists were updated a little bit.

It is more likely a typo than an adjustment to the posted Kv. I normally manually enter motor Kv when I use the tool, along with battery voltage. :)

I use it also, very helpfull for gearing etc!

To all who still use the R/C Speed tools, I have taken down the ScriptAsylum.com site. It was just an expense I didn't want to deal with anymore, nor did I want to ask for handouts or deal with advertising (I HATE ads).

I figured I'd get a few emails on the subject, so I thought I'd preempt them. Attached is a zip file which contains all the speed calcs and tools that used to be on the site. To use them, follow these instructions:

1. Download the "rc_speed.zip" file to your PC.
   
   
2. Using a compression program like WinZIP, WInRAR, 7-zip, etc., unzip to a spot on your PC. This should create a "rc_speed" folder containing all sorts of files.
   
   
3. Open the "rc_speed" folder, and then open "index.html" in a browser like Firefox, Internet Explorer, Edge, etc. Note that Chrome does NOT work because of some security issue.
   
   
4. Everything should work as it did online.

Or, you can host online using pretty much any server. It's not tied to any specific technology so it should work fine on Apache or IIS servers, or on any operating system. The code is very old, so I would have it sit in its own directory to avoid conflicts with any APIs or libraries.

Feel free to share with other people if you want on forums or wherever. The copyright just says you can't package it as your own and sell it.

Thanks BG for all the years of this awesome tool.