Speed Calculator

[jnev]

Hopefully you haven't updated it yet. I am looking for the Losi MRC ratios right now...

Edit: Copy and pasted from RC-Driver:

The internal transmission ratio is 7.59:1. With the stock 60 tooth spur gear and 14 tooth pinion, the transmission has an overall ratio of 32.5:1. The ring and pinion in each axle have a ratio of about 2.64:1. This gives the Mini Rock Crawler an overall ratio of 85.96:1.

[BrianG]

Nope, no updates until I get the data requested in this post. I usually post my intent to update and wait a couple/few days for the responses. Seems to limit the late requests...

[lincpimp]

Originally Posted by BrianG

OK, I really don't want to download the PDF and figure this out. So could you list all the gears used for each speed?
LST 1st gear: ?
LST 2nd gear: ?
List the gear pairs like so: output/input, output/input, etc. Similar to how I have the revo tranny listed in the calc. That would be the most helpful to make sure I have the right data.

And yeah, I'll add the Mod1.5

Ok lets start with the external 2 speed. Not sure if you will add that info (guess the spur sizes could go in the "spur section" under Lst)?

1st - 70/18
2nd - 63/25

Now here are the internal ratios:

LST FOC (this is the losi kit, also the internals of the aftershock are the same as this) - 23/22 primary 30/15 secondary

The Lst and Lst2 have a manually selectable high/low internal gearing, all other lst based trucks have the FOC listed above.

Lst/Lst2 low range internal gearing - 30/15 primary 30/15 secondary
Lst/Lst2 high range internal gearing - 23/22 primary 30/15 secondary

Also your "swap mod" info is correct.

I am sure no one care about the ratios for the mech reverse, so I will not bother looking them up.

[NoControl]

Question brian or anybody for that fact.

On a tc5 the fron and rear diffs are 40t the 2 pulleyes atached to the spur are 20t. Would I be correct in assuming the calc inputs should look like

F\r diffs: 2/1
Tranny: 1
add gear ratio: 1
spur: 80 (stock gear)
pinnion: 30 (since thats what I ordered)
Battery: 7.2v 6s 1.2 (since I don't have any 2s lipos yet)
motor: 5400 ( 7.5 novak drift motor)
wheels: 2.5

Not sure what the rest of the optional data is value wise.

[brushlessboy16]

So whens the update comin?

[What's_nitro?]

Originally Posted by NoControl

Question brian or anybody for that fact.

On a tc5 the fron and rear diffs are 40t the 2 pulleyes atached to the spur are 20t. Would I be correct in assuming the calc inputs should look like

F\r diffs: 2/1
Tranny: 1
add gear ratio: 1
spur: 80 (stock gear)
pinnion: 30 (since thats what I ordered)
Battery: 7.2v 6s 1.2 (since I don't have any 2s lipos yet)
motor: 5400 ( 7.5 novak drift motor)
wheels: 2.5

Not sure what the rest of the optional data is value wise.

That looks right to me. You only have two ratios to deal with. The 2:1, and your pinion/spur ratio. Everything else would be 1:1.

[NoControl]

Thanks nitro.

[BrianG]

OK, I finally made an update:

- Added several brushed motors.

- Fixed LST/LST2 transmission ratios.

- Added LST/LST2 FOC transmission ratio.

- Added Hot Bodies D8 differential ratio.

- Added a note for the old RCM slipperential stating V1 is discontinued.

- Added Mod 1.5 gear pitch.

- Added Losi MRC transmission ratio.

- Removed battery charger data table, selection box, and all code relating to pre-set battery charger information.

- Added new feature to the Power Calculator page. Once the user enters the data into the form and calculates the power figures, it will also provide a table listing estimated pack capacities to get the same runtime at different voltages.

- Removed the Sky & Technologies link (Quark) since the address is no longer active.

- Removed the Beta alert on the BL Parameter Comparison page.

[SnoopMaxx]

Lot of updates
I have a 775 Titan Motor in my 3906
Do I use the 10T brushed 6526 Kv rating ?


105.35 mph (169.23 km/h)

The Titan 775 is closer to 1300 Kv I think

[whitrzac]

any chance you could add the novak/speed passion "1/8" motors??

and the basic ROAR leagl ones too...

[BrianG]

Originally Posted by SnoopMaxx

Lot of updates
I have a 775 Titan Motor in my 3906
Do I use the 10T brushed 6526 Kv rating ?


105.35 mph (169.23 km/h)

The Titan 775 is closer to 1300 Kv I think

I'm not sure. Those brushed motors were added by request and I believe they are normal 540 size. Most likely, a larger motor with the same turn count will have a lower kv, but exactly what, I don't know.

Originally Posted by whitrzac

any chance you could add the novak/speed passion "1/8" motors??

and the basic ROAR leagl ones too...

:sigh: Lol, I did ask everyone for any other suggestions so that the update would include everything. But every time I post an update, there's always one more thing.

I generally shy away from adding just any motor. This site is not affiliated with RCM, but it IS meant for the members here, so I try to stick with what Mike had. Besides, the motor list is getting VERY long. At some point, it will become very cumbersome. But, if demand is high enough, I guess I could add Novak stuff. Post things like kv, size, etc and I'll add them.

[whitrzac]

size turn watts KV wight shaft WORTHLESS INFO

HV4.5

3524

Sensored

550

4.5

890

5,000

8.36

5mm

Large

High / HighS

Y

Y

Y

Y

Black

Ribbed

HV5.5

3525

Sensored

550

5.5

800

3,700

8.36

5mm

Large

High / HighS

Y

Y

Y

Y

Black

Ribbed

HV6.5

3526

Sensored

550

6.5

730

3,400

8.36

5mm

Large

High / HighS

Y

Y

Y

Y

Black

Ribbed

HV7.5

3526

Sensored

550

7.5

620

3,000

8.36

5mm

Large

High / HighS

[Kcaz25]

I don't use Novak anymore but I do use your site Brian and I appreciate every thing you do.

[whitrzac]

Originally Posted by Kcaz25

I don't use Novak anymore but I do use your site Brian and I appreciate every thing you do.

I prefer not to, but they do make nice motors for a mid size conversion

[BrianG]

Originally Posted by whitrzac

size turn watts KV wight shaft WORTHLESS INFO

Thanks, I'll put that in my next update...

Originally Posted by Kcaz25

I don't use Novak anymore but I do use your site Brian and I appreciate every thing you do.

No problem! And thanks!

Originally Posted by whitrzac

I prefer not to, but they do make nice motors for a mid size conversion

For the price, a 60mm or 70mm Medusa is better IMO.