i dont think the 2.5's or the 3.3's will be enough.. you might need somehybrid diffs for 6s, and definatley get steel idlers for the trans

4s you would still need a driveline update, A123 are technically safer then lipos, but as long as you have some common sense lipo's should be fine.

How about, in "motor selector" there is vehicle weight, but is it lbs or kg or something else??

If your willing to add Then cen matrix Tr, the diff ratio is 2.8888888 9/26.

Spur gear is 66t stock.
:intello:

Sorry, I guess I missed this question. Anyway, it's pounds.

Yeah, I can add that.

Looks like it's time for a small update. Before I go making the changes and FTP'ing everything back up, are there any other additions to make (mainly ratios and the like)?

Just wanted to say that that whole site is great, it even helped me on school today! :lol:

I didn't knew what the teacher meant with Parallel and in Series, he couldn't explain it good to me, but after seeing some things on that site I get it :yipi:


The only thing that could be better is more cars in the Speed Calculator.. ( More Diff ratio etc. )


- Patrick

Lol, glad it helped, although I never thought it could be used as a teaching aid! :smile:

I add ratios for any car I have or am thinking of getting. Then, I add any ratios people submit. However, the ratios have to be tooth counts of the two (or more) gears, rather than the final ratio. Posted ratios are typically rounded and introduce errors in the final calculation. So, I use the tooth counts, do the math (keeping high precision), and only round the display value. So, if you have any of that info, feel free to post it!

And as a side note: I am currently working on another similar project for Mike, so any additions will help him in the long run as I will be borrowing much of the data from my site.

Brian,

Your calculator is awesome. It was dead on with the speed I got from my BPP truggy. Great job.

Glad to hear it! Just curious, was it the theoretical max speed, or the adjusted speed?

That was the one that was dead on, 46mph.

Do tell - what is the project? How can we all help?

Lol, that was an either/or question. Was it the theoretical top speed (no drag estimates figured) OR was it the drag adjusted speed. :lol:

I'll have to ask Mike how much he wants publicly known first. I do know he said it was ok to get user's input on the various vehicle data. I am currently putting together a google docs spreadsheet to easily gather this data instead of sifting through posts (and we all know how topics tend to stray). I will add in what I already know and then post the result for others to add.

theoretical top speed not the drag adjusted one. I guess the torque of the 1521/1Y was enough to push it through the air.

I find the thoretical top speed closer most of the time. I'm not really sure that the drag adjusted thing is all that accurate. Seems like WAY to many variables to accurately estimate them all. Its cool that it tries to do it though.

Brian... I'm interested in this "project" also. If it is what I think it is it will be an awesome addition around here.

Just for giggles, what do you think it is? Not that I'll say if you're right or not. :tongue:

Is it a.... database similar to your motor selector and speed calculator to be used as a system builder and component selector for selecting all of the components you need to do a conversion for most of the common vehicle conversions? You select your vehicle and then choose basic options and it selects the components you need to do your conversion. Not just a motor selector, but a whole setup selector. Motor mount, battery tray, pinion gears, everything you needed for a specific conversion.

Top all that off with a "Buy Now" button at the bottom and have it all load into the cart and you would have a beautiful system.

Question. What unit of measure is the weight suppossed to be in? lb's or kg?

For like the vehicle weight? LBS IIRC

yep, the vehicle weight on the calculator.

IIRC ?

You are probably referring to the motor selector page? Yeah, that's in pounds. Sorry guys. :oops:

For future reference, assume "standard" measures when not specified (inches, pounds, mph, etc).

I really gotta do an update it seems. There are several items to fix/add now. Maybe this weekend...

Had to ask about that one myself. IIRC If I remember correctly.

IIRC is indeed If I Remember Correctly.

A list of the common acronyms: http://www.rc-monster.com/forum/showthread.php?t=7440

FYI: Small update is up:

- Added CEN Matrix diff/spur
- Removed "drag adjusted" speed from the "Top Speed Estimator" page because there are too many variables to be useful.
- Added clarification for vehicle weight in the "Motor Selector" page.
- Added a "Scale Speed Calculator" page. Yeah, not really useful, but it was easy to do so why not? :smile:

Brian anyway you can add the CEN Nemesis 7.7??

Thanks

I'm sure he will but you have to supply the ratios...

Yep, supply the two tooth counts and I'll add them...

The gear ratio from a Losi LST is 43/13

Quote:

Enter Diameter of Dear

I found it in the Gear Diameter Calculator

:intello:

:whip:

What? Am I not allowed to make mistakes? :wink:

Actually, I did that on purpose to see who was paying attention! Yeah, that's it. :whistle:

:lol::lol:Hey Brian everybody makes mistakes once in a while

What was that underlined word for? :wink:

Pitch of Cen Matrix spur gear is Mod 1

OK, another update:

- Fixed spelling error in gear calculator page; "dear" should be "gear". :na: SnoopMax
- Added Losi LST diff ratio.
- Alphabeticalized spur, diff, and transmission lists by manufacturer.
- Noted the pitch for the CEN Matrix is Mod1

Ok, that's it for a couple more months.

Your the man :)

Fyi: Muggy diff gear ratio is 45/11 (not the same as a LST)