RE: Mystery Solved! How to select the proper gearing for your electric RC!   
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Electric Off-Road Trucks, Buggies, Truggies and more >> RE: Mystery Solved! How to select the proper gearing for your electric RC!
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RE: Mystery Solved! How to select the proper gearing fo... - 3/13/2005 7:41 PM   
Speedmunkey



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Status: offline 		Skrappy, I got your article and it looks very good. We need some pics or something to spice it up. Anyone got a few hundred spur gears lying around that they can snap a picture of? I have a grand total of 6 lol.. I do have like 20 pinions I could take a picture of..

I've got an idea, gimme 5 minutes..


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RE: Mystery Solved! How to select the proper gearing fo... - 3/13/2005 7:51 PM   
Speedmunkey



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Status: offline 		And here we go.. Thing this illustrates which is which? We have to dumb it down so anyone can understand it. It would be nice to assume no one worried about gearing would be confused as to which gear was which, but you can never underestimate a newbie.. lol

And yes guys, I'm aware that I've butchered that Losi motor guard.. You should too

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RE: Mystery Solved! How to select the proper gearing fo... - 3/13/2005 9:31 PM   
jakjr



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quote:

ORIGINAL: Speedmunkey

Skrappy, I got your article and it looks very good. We need some pics or something to spice it up. Anyone got a few hundred spur gears lying around that they can snap a picture of?


Not spur gears, but pretty close



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RE: Mystery Solved! How to select the proper gearing fo... - 3/13/2005 9:46 PM   
Speedmunkey



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Status: offline 		B.C. Rich has always made some strange looking critters. I'm more of a strat guy myself.

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RE: Mystery Solved! How to select the proper gearing fo... - 3/13/2005 10:53 PM   
S.A.E.W.O.T.



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Status: offline 		isa' 12.18 a good over all ratio?... like 12.18 turns of the motor turns the wheels once? 4 off roading? and i have a wheel and gear ratio of 3.2?.....what does that mean?

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RE: Mystery Solved! How to select the proper gearing fo... - 3/13/2005 11:05 PM   
jakjr



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Status: offline 		12.18 sounds about right for an ST, but it depends on the tires your running.


quote:

B.C. Rich has always made some strange looking critters. I'm more of a strat guy myself.


Nice

Ive always like gibsons (wish they werent so expensive ) but my grandpa likes strats (he has 3 of them).

(disregaurd the stuff in the background of this pic)

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< Message edited by jakjr -- 3/13/2005 11:12 PM >


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RE: Mystery Solved! How to select the proper gearing fo... - 3/13/2005 11:16 PM   
Speedmunkey



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Status: offline 		Why disregard it? I've owned practically every item there at one point or another, cept for the MXR pedal.


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RE: Mystery Solved! How to select the proper gearing fo... - 3/14/2005 2:25 AM   
C3Racing



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quote:

ORIGINAL: SkrapIron

The stock Evader gearing, for the photon is deliberately undergeared. It is done so to compensate for the lack of performance of the Photon motor. You will do better to tinker with the pinion gear to get a baseline. From there, you can fine tune it with a new spur gear.

Welcome to a bright new world!



Photon what !! i got rid of that 2 wks later.. i got a chameleon 2 pro and a reedy quad mag!!

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RE: Mystery Solved! How to select the proper gearing fo... - 3/14/2005 2:53 AM   
S.A.E.W.O.T.



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Status: offline 		yea my photon speed motor lasted about 2 weeks, then it jus startin' bein' dum! so i went out a got a mvp stock!

< Message edited by S.A.E.W.O.T. -- 3/14/2005 2:54 AM >

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RE: Mystery Solved! How to select the proper gearing fo... - 3/14/2005 6:30 PM   
savage_beast99


 

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Status: offline 		you think thats bad try the stocker in a xxxt sport rtr 2, mine lasted 4 runs before a teeeennnnyyy pebble got into the motor and ripped apart several turns.

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RE: Mystery Solved! How to select the proper gearing fo... - 3/14/2005 6:55 PM   
savage_beast99


 

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Status: offline 		here is a question, i used the calc on the site, the stock setup for my xxxt comes out as 1.874!! did i do something wrong or did losi just overgear the snot out of the stock setup?

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RE: Mystery Solved! How to select the proper gearing fo... - 3/14/2005 9:17 PM   
Speedmunkey



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Status: offline 		Probably overgeared it.. What's the numbers?


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RE: Mystery Solved! How to select the proper gearing fo... - 3/15/2005 2:53 AM   
mkranitz



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quote:

ORIGINAL: SkrapIron

I think I'm going to edit the article, and use your speed calculator verbatim. It's alot less convoluded than my explaination. Although we get the same results, yours is easier to understand.



Skrappy,

I hope the calculator is doing its job accurately. If not, let me know and I can change it.

Michael

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RE: Mystery Solved! How to select the proper gearing fo... - 3/15/2005 2:58 AM   
Speedmunkey



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Status: offline 		Micheal, I checked a few different gearings yesterday and it was right on the money.


heheheh you called him Skrappy too lol! Now he needs a new avatar, something like this:




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RE: Mystery Solved! How to select the proper gearing fo... - 3/15/2005 3:52 AM   
jakjr



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Status: offline 		What would be neat is it had a pull down menu with tranny ratios for all the popular cars.




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RE: Mystery Solved! How to select the proper gearing fo... - 3/15/2005 6:09 AM   
mkranitz



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Status: offline 		Speedo,

It just occurred to me that the Gear Ratios for a bunch of cars area already in our Product Guide. I'm adding a link to the GearWizard now.
mk

< Message edited by mkranitz -- 3/15/2005 6:15 AM >

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RE: Mystery Solved! How to select the proper gearing f... - 3/15/2005 6:22 AM   
mkranitz



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Status: offline 		Links to GearWizard are now in the "Community" button!

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RE: Mystery Solved! How to select the proper gearing fo... - 3/15/2005 1:12 PM   
Speedmunkey



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Status: offline 		Micheal, I looked at the product guide and I couldn't find the list. Got a direct link for it?


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RE: Mystery Solved! How to select the proper gearing fo... - 3/15/2005 4:49 PM   
S.A.E.W.O.T.



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Status: offline 		do u think u could make a gear calculator that kinda like this?


motor rpm: 40,000

pinion size: 19

spur size: 87

transmission ratio: 2.66

tires size (mm): 124

top speed = 37.4 mph

roll out = 12 mm


that would be kool so like u kinda have a base line 2 see how fast ur car is goin! it won't be 100% acrurate but jus 2 give u an idea!?

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RE: Mystery Solved! How to select the proper gearing f... - 3/16/2005 6:42 PM   
changss


 

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Status: offline 		w00t!! thanks skrapiron and everyone's contribution to this! I've been struggling with this scary gear ratio for a long time, searching for information on the web, but still don't know what gear ratio should I use with different motors. now i've a rough idea of what should I do can wait to fine tune my TRF415 with my 9T motor...

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RE: Mystery Solved! How to select the proper gearing fo... - 3/16/2005 6:54 PM   
Speedmunkey



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Status: offline 		changss, use Skrap's forumla to get in the ballpark, then fine tune it by feeling of the motor after a few laps.. You should be able to hold your finger on the can for 5 seconds without having to pull away. If it's that cool, you are golden. If it's hotter, you need to drop a tooth and try again. Don't forget to check it, cuz a hot mod like a 9t can go south REALLY fast from the heat.


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RE: Mystery Solved! How to select the proper gearing fo... - 3/20/2005 11:00 PM   
changss


 

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Status: offline 		woooooo~~ yes you are right, just tried it out today, and the motor got soooooo hot (burning!! ) after a few mintues... well, i put on a pinion with "some extra teeth"... I guess I should start from the recommanded solution =P

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RE: Mystery Solved! How to select the proper gearing fo... - 3/21/2005 3:31 AM   
SkrapIron



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Status: offline 		That's the Idea. Use the formula as a BASELINE. Then, you can fine tune your performacnce, up or down, depending on the conditions that you are running under.

Enjoy!

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RE: Mystery Solved! How to select the proper gearing fo... - 3/22/2005 12:05 AM   
twostep


 

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Status: offline 		OK. This formula seems very well put together and useful.
My question is........
How do i apply this to what type of motor im running. If i want my number to be as close to 0 as possible, what makes gearing my 10turn different from gearing my 27turn???

I Hope i explained my question properly.

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RE: Mystery Solved! How to select the proper gearing fo... - 3/22/2005 2:34 AM   
SkrapIron



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Status: offline 		It does not matter what motor you select. Follow the gearing selector. The speed of your truck/buggy is determined by the RPM of the motor, not the gearing selected. If you over-gear, even a low turn motor, you may gain a few mph more, but increase the risk of damage to your motor, esc and battery. The Formula is INDEPENDENT of the motors number of turns.

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