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Old 07-29-2009, 02:29 AM   #5416
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LiPo use 4T or 4.5T had very fast .
Temp around 60-70 C
I would say 4.0t is the mainstay motor in mod. 4.5t is ok for small or low grip tracks but I also run 3.5t on some large tracks. Just be aware that while most people from spec racing struggle with motors of that power level most decent mod drivers can make use of that extra power to go faster even if they only use it on one section of the track. For this reason the speedy must be able to handle this kind of abuse. Note though that I am a big fan of using the speedies throttle profiles to manage the power to prevent me from being too greedy in head to head racing and I find this also makes a big difference to the temps.
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Old 07-29-2009, 12:04 PM   #5417
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I tried the 199 program and it does have some glitches. Hopefully the 200 program will be out soon.

I have a NIB RS PRO for sale $200 shipped.
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Old 07-29-2009, 12:18 PM   #5418
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Would you guys say the Hotwire is almost a requirement if you own the RS/RS Pro?

I love my tekin. Not so much my LRP SXX that's in my SC10.
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Old 07-29-2009, 12:22 PM   #5419
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Would you guys say the Hotwire is almost a requirement if you own the RS/RS Pro?

I love my tekin. Not so much my LRP SXX that's in my SC10.
Yes. To take full advantage of the ESC you will need the Hotwire.
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Old 07-29-2009, 12:44 PM   #5420
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I tried the 199 program and it does have some glitches. Hopefully the 200 program will be out soon.

I have a NIB RS PRO for sale $200 shipped.

What are these glitches?

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Old 07-29-2009, 01:02 PM   #5421
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Sorry guys, uber,uber busy day in the office

Yes, exactly what you are describing... I would call 8.0 fdr a high ratio, a 4.0 a low ratio, if that contradicts what i've said already

A wrong gear ratio will heat the motor up more, whatever way you look at it.

A high ratio on a big track can make you hit your peak rpm too early, a low ratio on a small track will take you a century (and several wide corners) to find the top end speed such ratio gives, with no low down torque...

Think of it as trying to accelerate to full speed in a full size car when you're in 5th gear and going slowly. Its not healthy for an engine, its probably not healthy for an ESC/motor either...
Dragging this back a couple of pages...

This is not correct. The engineering standard is that high ratios are (for example) 1:1 and 2:1 in gearing, and low ratios are (for example) 10:1 and 12:1 - the bigger the number, the lower the ratio. You will confuse everyone if you don't stick to that convention!!

A low ratio multiplies the torque more, making it easier for the motor to gain revs. A high ratio multiplies the torque less, making it harder for the motor gain revs.

Power is torque x revs. If you have more torque, you can run a higher ratio because the motor will be able to gain speed using its torque. If you have more revs, you run a lower ratio to allow the motor to gain speed using its revs.

In neither case is it a given that the ratio allows you to get to top speed at any given point on any given track. For example, using the timing boost on the Tekin speedos increases the revs to get more power, as the torque is fixed for a given motor. But, to access those revs, you will need to drop the ratio (go to a lower ratio) as torque declines as the revs rise.

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Old 07-29-2009, 04:41 PM   #5422
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Sorry buddy, but EVERYONE else in RC forever has used high ratios being higher numbers, in relation to gear ratios. I think you may have your input-output wrong with the way you are referencing. It's a "high" ratio becuase at 10:1 the motor has to spin more to move the car than, say, 6:1.
I'm sure if the entire RC industry is at odds with the engineering community they won't lose too much sleep over it....
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Old 07-29-2009, 04:47 PM   #5423
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Sorry buddy, but EVERYONE else in RC forever has used high ratios being higher numbers, in relation to gear ratios. I think you may have your input-output wrong with the way you are referencing. It's a "high" ratio becuase at 10:1 the motor has to spin more to move the car than, say, 6:1.
I'm sure if the entire RC industry is at odds with the engineering community they won't lose too much sleep over it....
Which is the exact opposite of normal use. For example, when you get in your car and put er into 1st gear to take off down the street, would you say you were in a low gear? or a high gear?

Regardless, its just semantics. Perhaps the confusion comes from interchanging the terms "high gear" and "high gear ratio".

When somebody says to me "gear your car high", or "gear up", I think of something closer to 1:1. When they say "gear your car low" or "gear down", I think of something like 10:1.
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Old 07-29-2009, 05:40 PM   #5424
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SlowerOne and Capt. America have it right... Those of us that play with 1:1 cars are used to 4:1 being a lower ratio than 2:1, and I'm still trying to figure out how the R/C community managed to accept the opposite as being true. However, it DOES explain the reason behind so many blown motors and ESCs over the years...
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Old 07-29-2009, 05:43 PM   #5425
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No need to post here about the glitches, because this is a beta version, and I've already given my feedback to the appropriate people. Once they release the 200 program, the glitches should be gone.


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What are these glitches?

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Old 07-29-2009, 05:59 PM   #5426
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SlowerOne and Capt. America have it right... Those of us that play with 1:1 cars are used to 4:1 being a lower ratio than 2:1, and I'm still trying to figure out how the R/C community managed to accept the opposite as being true. However, it DOES explain the reason behind so many blown motors and ESCs over the years...
The 1:1 people that call a 4.11 gear lower than a 3.73 gear are the same people that call an engine a "motor". Most people that had high school physics will know that a 4:1 gear is a higher ratio than a 3:1 gear.

But, back to the RS...
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Old 07-29-2009, 06:01 PM   #5427
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Originally Posted by oeoeo327 View Post
SlowerOne and Capt. America have it right... Those of us that play with 1:1 cars are used to 4:1 being a lower ratio than 2:1, and I'm still trying to figure out how the R/C community managed to accept the opposite as being true. However, it DOES explain the reason behind so many blown motors and ESCs over the years...
for me when someone says 'gear up' they are NOT talking about the ratio, but the pinion size. as in, what pinion are you running ... a 32.....oh man thats to small you need to gear up..... as in put a 35 on. just my opinion
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Old 07-29-2009, 06:09 PM   #5428
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for me when someone says 'gear up' they are NOT talking about the ratio, but the pinion size. as in, what pinion are you running ... a 32.....oh man thats to small you need to gear up..... as in put a 35 on. just my opinion
Bingo. That's the Pit talk round here too.
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Old 07-29-2009, 06:19 PM   #5429
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The 1:1 people that call a 4.11 gear lower than a 3.73 gear are the same people that call an engine a "motor". Most people that had high school physics will know that a 4:1 gear is a higher ratio than a 3:1 gear.

But, back to the RS...
An Engine IS A motor. Lets look up the definition, shall we?

Quote:
mo⋅tor  /ˈmoʊtər/ Show Spelled Pronunciation [moh-ter] –noun

1. a comparatively small and powerful engine, esp. an internal-combustion engine in an automobile, motorboat, or the like.
You are confusing "motor", with "electric motor".

But back to the RS When we getting 200?!?!?
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Old 07-29-2009, 06:52 PM   #5430
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Wow, I leave you guys alone for a few minutes and whamo! Gear ration talk and a "definition" argument! LOL

Gearing up was traditionally a reference to pinion sizes, back when we had very limited choices on spurs,etc.

200 was bench tested and track tested in house all day today...it's coming.
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