Speed Calculator

[Unsullied_Spy]

1:1 for my Muggy is around 9T, ideal gearing so far seems to be 14T. No offense but I think that theory doesn't work so well. With a 9T pinion I'd be over-revving the motor and have no speed at all.

[simplechamp]

Originally Posted by Unsullied_Spy

1:1 for my Muggy is around 9T, ideal gearing so far seems to be 14T. No offense but I think that theory doesn't work so well. With a 9T pinion I'd be over-revving the motor and have no speed at all.

There are exceptions, and 1:1 rollout isn't a hard and fast rule, but for the most part it works. It's meant to put you in the ballpark gearing ratio and then you fine tune from there based on what your electronics can handle, how you plan on driving, etc. There are so many factors to account for, 1:1 rollout is just to find a good starting point.

[Aero]

this rc calculator is SO cool, and am glad to se it improved and updated! I would like to help, or contribute, comment and suggest..I would like if you put in some 'FYI' fields, maybe not to be used in calculator, but to jsut write the info, if you know what i mean..would also be handy if one capture the screeen, and have some custom lines, that tell the model/setup comments.

"pole count" of motors would be nice to have data on..(missing pole count in motors below..dunno the count..)

a few things i'd love to see in your calculator:

could you add a drop down menu under motor resistance ? and also add some motors (see below). i know you say that 'mike dont have..' but i think its handicapping/encribbling your amazing calculator sticking with what mike has.
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More/better help/tip on 'current motor draw in amp'
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more clarification on '1:1 rollout'. why care for this, what to obtain, go for, etc..
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In 'Parameter solver' and other places, could you include KPH, or in general to some extend, metric values ? maybe inside the usual ()-clamps

and can you add these tranny gearings:

E-savage metal tranny low-geared: (32/20 x 24/26) = 1,476...

(presently im using additional gearing 0,85 to make above 'happen')

E-savage metal tranny low-geared: (32/20 x 26/24) = 1,733.. (thats same as stock)

E-savage spur gears: 60t, 68t, 70t, 72t(all 32p), 49t(mod1)
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Could you add these tires/diameters:

Hot Bodies/HPI type Baja/BJ tires 138x70mm:
Part#: HPI82002
Outer Diameter: 134.9mm (5.311")
Inner Diameter: 78mm (3.07")
Width: 63.5mm (2.5")

HPI Dirt Bonz Tires:
Part#: HPI4853
Diameter: 5.91" (150mm)
Width: 3.27" (83mm) / (93mm)

Traxxas Response Racing Soft Compound 3.8 Tires:
Part#: TRA5471
Width: 3.2" (82mm)
Diameter: inner diameter 2.8" (72mm), outer 5.3" (135mm)

Traxxas SportTraxx 3.8 Soft Compound Tires:
Part#: TRA5470
Outer Diameter: 5.75" (146mm)
Inner Diameter: 3.5" (90mm)
Width: 3.8" (96.5mm)
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Could you add these motors:

Great Planes Ammo 36-56-2600KV:
Part#: GPMG5320
Max efficiency: 89%
NO flanged front endbell
Front mount holes: 25mm apart
Motor Diameter: 1.42" (36mm)
Motor Length: 2.2" (56mm)
Shaft Diameter: .197" (5mm)
Shaft Length: .591" (15mm)
kV Rating: 2600 rpm/V
Weight: 10oz (283g)
Input Voltage: 11.1-14.8V
Max. Constant Current: 55A
Max. Surge Current: 90A
Max. Constant Watts: 815W
No Load Current: 3.9A

Great Planes Ammo 36-56-1800KV:
Part#: GPMG5315
Max efficiency: 89%
NO flanged front endbell
Front mount holes: 25mm apart
Motor Diameter: 1.42" (36mm)
Motor Length: 2.2" (56mm)
Shaft Diameter: .197" (5mm)
Shaft Length: .591" (15mm)
kV Rating: 1800 rpm/V
Weight: 10oz (283g)
Input Voltage: 14.8-22.2V
Max. Constant Current: 50A
Max. Surge Current: 90A
Max. Constant Watts: 1110W
No Load Current: 1.9A

Great Planes Ammo 36-56-1200KV:
Part#: GPMG5310
Max efficiency: 89%
NO flanged front endbell
Front mount holes: 25mm apart
Motor Diameter: 1.42" (36mm)
Motor Length: 2.2" (56mm)
Shaft Diameter: .197" (5mm)
Shaft Length: .591" (15mm)
kV Rating: 1200 rpm/V
Weight: 10oz (283g)
Input Voltage: 18.5-25.9V
Max. Constant Current: 40A
Max. Surge Current: 80A
Max. Constant Watts: 1036W
No Load Current: 1.2A

Great Planes Ammo 36-88-1280KV:
Part#: GPMG5325
Max efficiency: 89%
NO flanged front endbell
Front mount holes: 25mm apart.
Motor Diameter: 1.42" (36mm)
Motor Length: 3.46" (88mm)
Weight: 16.3oz (461g)
Stock No. GPMG5310
Shaft Diameter 5 mm
Shaft Length 15 mm
RPM / V (kV Rating) 1280
Bullet Connector 4 mm
Weight 16.3 oz. (461g)
Input Voltage 18.5-22.2 Volts
Maximum Constant Current 50 Amps
Maximum Constant Wattage 1010
Maximum Surge Current 80 Amps
Maximum Surge Watts 1776 Watts
No Load Current 2.8 Amps
Internal Resistance 12.4 mOhm

B36-74-09XL 1900KV:
NO flanged front endbell
Front mount holes: 25mm apart.
Dimensions: 36×74mm
Shaft diameter: 5mm
Weight: 370g
Kv: 1900rpm/V
Idle Current: 2.6A
Resistance: .0091
Max Amp: 75A
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On the lipo charger pages: Can you please Add Imax B5, B6, B6AC and B8 chargers, E-station BC8DP

Imax B5:
Operating voltage range: 10.0~18.0Volt
Circuit power: max.50W
Charge current range: 0.1~5.0A
Current drain for balancing Li-po: 200mAh/cell
NiCd/NiMh battery cell count: 1~14cell
Li-ion/Polymer cell count: 1~5series
Pb battery voltage: 6V, 12V
Weight: 280g
Dimensions: 130*80*23mm

Imax B6:
Able to charge for A123(LiFe) battery
Operating voltage range: DC10.0~18.0 Volt
AC100-240V, 50/60Hz
Circuit power: Max. Charge power 50W
Max. Discharge power5W
Charge current range: 0.1~5.0A
Discharge current range: 0.1-1.0A
Current drain for balancing Li-po: 300mAh/cell
NiCd/NiMH battery cell count: 1~15cell
Li-ion/Polymer cell count: 1-6 series
Pb battery voltage: 2V-20V
Weight: 580g
Dimensions: 140X130X45mm

Imax B6AC:
DC 11.0 ~ 18.0 Volt or
AC 100V ~ 240V 50/60Hz
Circuit power : AC to DC adaptor (DC 11.0 ~ 18.0V / 5A)
Max. charge power 50W
Max. discharge power 5W
Charge current range : 0.1~5.0A
Discharge current range : 0.1~1.0A
Current drain for balancing Li-Po : 300mAh/cell
NiCd / NiMH battery cell count : 1~15 cell
Li-Ion / Polymer cell count : 1~6 series
Pb battery voltage : 2V~20V
Weight : 531g (Net Weight)
Dimensions : 134 x 142 x 36 mm

Imax B8:
Operating voltage range: 10.0~18.0 Volt
Circuit power: Max. 150W
Charge current range: 0.1~7.0A
Discharge current range: 0.1~5.0A
Current drain for balancing Li-po: 300mAh / cell
NiCd / NiMH battery cell count: 1~27 cells
Lithium battery cell count: 1~8 Series
Pb battery voltage: 2 to 36V
Weight: 700 g
Dimensions: 160*120*40 mm

E-station BC8DP:
AC/DC Power: 11V to 18V Input
Charge Rate: 10 Amp Max
Charge Power: 180 Watts w/DC Power 120 Watts w/AC Power
Discharge Rate: 5 Amp Max per Channel
Max Lithium Cell: Up to 8S Lithium (Li-Po, Li-Ion, Li-Fe (A123)
Max Nickel Cell: Up to 22 cells NiCd/NiMH
Max SLA/Lead Acid: Up to 28V Pb SLA/Lead Acid
Discharge Power: 25 Watts on AC or DC
Balancer Bleed Rate: 200 mah per cell
Battery Capacity: up to 65,000 mAh
NiCd/NiMH Cycle Count: up to 10 Cycles
NiCd/NiMH Trickle Charge: up to 300 mah
Battery Memories: 10
Delta Peak Sensitivity: 5mV to 20mV
NiCd/NiMH Formation Charging: Timed
Weight: 1400 grams
Size: 170x170x75mm
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On system wiring page:

Can you add Mamba max and Mamba monster esc's ?
Can you add 3 fans option ?
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"Brushless parameter comparison": that seems neat and logic, but what is this used for, could this one be expanded in a way ?
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On "Lipo wiring" page, could you include 'align/electrifly/JST XH connectors ? that would make the pics look more correct. i fooled around with the pic and made something liek this.

hope its ok i edited the pic ;) . Now im at it, it would be nice/neat to select bullet connectors, if thats worth a thought..

BTW, I believe its important/good rule, to connect main leads FIRST, and disconnect main leads LAST.. can someone nod to that ?

Finally, I have wish: If you could make at least 3-5 setup saving (/memory slots) buttons, like the 'Dark Horse RC calculator has' , see http://dhrc.rchomepage.com/RolloutCalc.htm . then one can keep a previous setup, enter new setups, and compare them easy, instead of having multiple windows with the calculator. Perhaps take the best from dark horse calculator. I see is has battery capacity, truck/car weight, wheel RPM..

Also, selecting lipo cell voltage, so which to pick, 4.2V not that accurate in practical terms ? How about some sorta 'recommendation on what to pick here (may have to do with the esc/motor ratings?)
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On the gearing pages: Would be nice and handy to have fx a converter/recommender, that switch a 32pitch spur/pinion pair, to the closest approx mod1 gears, well only thinking out loud. Maybe its already there.. or a pop up window that sugest the gear teeth to be used to accomplish same ratio/distance between gears..well u figure..
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keep it up BrianG, This is an ultimate and very useful calculator! You work is VERY appreciated!! I hope you can use the suggestions

Edit: ...this is my first post on this awesome forum. (But lets pretend its post#763..sounds better)

HELLO ALL..