:lol:

IIRC, most of the tire sizes came from Arct1k - I never confirmed them. I assume he did all the hard work of doing the research, but I dunno where the data came from. I'll fix it after the site comes back online...

They did - the LPR's tire sizes weren't listed on the prolineracing site so I think I got them from tower - I had nothing else to validate the measurements against.

Something happened to the speed calculator for some reason... it worked yesterday, but now (today) when I go on it, it says: Error 404 - Not found

Any ideas?

yup, same for me here... :(

Check this post above, the server is currently down.:whistle:
Just download it if you need it.

Must have missed where he said that. Sorry! :oops:

In case it's not obvious, the site is back up. Sorry everyone for the inconvenience.

So LPR would be the almost the same size as E-Maxx tires?

How are you finding 1and1

I like them. No troubles so far (except when I forget to pay my bill). Once in a while, I get an email from them saying one of my scripts is malware, but I just tell them it's not and wait another 6 months before they send the same email. :rolleyes: Other than that, it's fine. No downtime that I know of. Domain name and lots of space for ~$30/year.

Added Slayer info...

Added E-Revo differential and transmission data.

Also, I want to take a minute and say thank you for your donations for the site! I don't know if you want your names mentioned, but you know who you are!

Added note about not using the no-spark circuit for the Mamba Max/Monster ESCs. Read the release notes and/or the note on the no-spark page for more information.

any details on why?

Causes voltage spikes that will fry the ESC.

Brian,

A suggestion for your already excellent web page. Don't know if you have time or think it would be worth the effort but never hurts to ask......

Maybe add an option to say your parameter solver or speed calculator that would pump out a table of what the est speed would be for say 10 different size pinions in increments of 1.

Don't know if I saying it correctly.

For example you would put all the info in for your RC on the est speed calc. Then instead of needing to go back and changing the pinion size from 10, 11, 12, etc. to see the different speed you would get. You could hit a button and it could display a table or something with the different speed you'd get for say a 10T - 20T pinion. It be cool then to go back and change the spur gear and see what the table would put out using the same pinions. Even on the reverse side say it would pump out the size pinion for estimated speeds of 30, 35, 45, 50, etc.

What do you think?

:yes:

np i sent in the last of my PP money- better then none i suppose and going to a good cause

I know what you mean. I'll have to think of a way to do this so it makes sense.

BLboy: thanks again!

Custom 1/4 dragster Build
 

This has helped me so much. Thanks Brian.

Update:

- Fixed a small display bug in the Data Tables page
- Fixed motor length value for Medusa 60mm motors (was listed as 50mm long).
- Added the few new 50 and 60mm Medusa Motors, as well as all the 70 and 80mm motors.

Did you get a chance to add the ax10?

Oops, no. :oops:

I saved the PM as a reminder to go out and get the gear tooth counts, but forgot. I'll add it to my to-do list. :smile:

Brian, this speed calculator is freaking sweeeeet, thank you!!

If you want, you can also add the HPI MT2 and HPI Wheely King diff ratios, which are the same as the AX10 (38/13). The Wheely King does have a transmission, but I have no idea what the ratio is.

I'm downloading the 35MB kit diagram for the AX-10 as I write this. I'll add those ratios as well...

portyansky: Thanks! :smile:

More updates:

- Fixed display bug for transmission data in Data Tables page.
- Added Axial AX-10 Crawler differential and transmission ratios, and spur gear sizes.
- Added differential ratios for HPI MT2 and HPI Wheely King.

Thank you....

Great! One of these days I ought to click that Paypal link.

Question - I noticed that if one does not use the preselected spurs, the calculators have no way of recognizing which pitch you are using, therefore, the calculations must assume a basic pitch. Is it mod1?

Thanks.

Actually, the pitch is not needed at all in the calculations, they are just there for informational purposes. The calculations simply use the tooth count...

Before I get any PM's: Yeah, I know the site is down. 1and1.com is apparently having some issues (even their main site isn't working). If you "need" the calc, it looks like you should have downloaded the zip archive, eh? :wink:

NVM, they seem to have rectified their problem. Carry on...

+1:yes:

Just out of curiousity Brian, why do you have the B4/T4 transmission ratio under the differential gear ratio and not under the transmission gear ratio section?

I don't know. A mistake perhaps? :oops:

FYI: I took a look at adding a popup table to list speeds with different pinons, or spurs, whatever, and decided against it. Just adds a level of complexity I don't really want to deal with. More like tedium than complexity. :smile:

What I DO want to add is an alert of some kind which will tell the user if they are geared too high. There is a point in gearing where the motor is not spinning fast enough per mph for smooth low speed/take-off operation (around 1mph). Looking back, it seems I set my vehicles up for around 1000+ rpm per mph and everything runs fine. I'd like to know if there is a good rule of thumb regarding this, but would also depend on motor size of course.

On a similar vein, GriffinRU had provided some input on this topic a while back with regards to the minimum motor rpm needed for adequate back-EMF pulses from the motor. The idea was dropped because my simple mind could not grasp what he was talking about, but I think it would be worthwhile to have this kind of data available.

I posted the following in another thread. If it IS accurate, and would be of use, I can add it to the calc:

Just want to make sure the formula is accurate...

While I'm at it, no one has any information about the following?

Is there any way you could put info on 4wd elec trucks (zx-5,xxx4 etc...)
Thanks, I love this program!

Well, I would need the info you want entered. Read this (specifically the topic "How do I submit data for a transmission or differential?"). I hate dissecting parts lists and exploded diagrams for the needed values, so if you can provide the data, I will be more than happy to add it...

http://rcgearing.com/

Here is another potentialy helpful gearing site. :)

depends on what batts you run, and what you have done to the drive train..