Speed Calculator

[pinkpanda3310]

That's handy for me

I don't have anything that will measure batttery resistance but I can work it out with this calculator.

[Aero]

Wow, its gettin better and better BrianG

But how does LESS gearing (on BL parameter comparison) result in LESS heat components (thinking of the motor) ?

I have a few suggestions to add. (up to you man )

HPI E-firestorm:
spur 48p: 87t,
tranny:
top drive gear 48p: 20t
idler gear 48p: 28t
diff gear 48p: 52t (diff ratio 1/1)

transmission gear ratio:
(28t/20t) x (52t/28t)
1,4 x 1,86 = 2,6

HPI Savage Flux bulletproof diffs:
29t/9t = 3.222..

------------------
Traxxas Velineon motor

TRA3371: 380 size
Can Length: 48.15mm (1.9")
Can Diameter: 28mm (1.1")
Shaft Length: 12.7mm (0.50")
Shaft Diameter: 3.15mm (0.12")
KV: 4000 (8-turn)
Current: 25A constant/ 50A burst
Max RPM: 50,000
Weight: 140g (4.94oz)
---------------------
Traxxas Velineon motor
TRA3355: 540 size
Type: Sensorless brushless
RPM/volt: 3500KV (10-turn)
Magnet type: Ultra High-Temperature, sintered neodymium
Connection type: TRX 3.5mm bullet connectors
Wire Size: 12-gauge Maxx Cable w/ solder tabs
Current Ratings: 65A constant; 100A peak/burst
Max RPM: 50,000
Diameter: 1.42" (36mm) (540 size)
Length: 2.165"(55mm)
Weight: 9.24oz (262g)
---
Hobbywing 2350KV, 36x74mm, 2-pole, 363g, Resistance: ?, Current: ?, Watts: ?
Hobbywing 2300KV, 36x65mm, 2-pole, 305g, Resistance: ?, Current: ?, Watts: ?
Hobbywing 2000KV, 44x65mm, 2-pole, 455g, Resistance: ?, Current: ?, Watts: ?

If anyone know the details on above motors, its great.

Losi XXL gearing:

the output gears in the xxl tranmisssion have a 29/16 ratio
2nd gear xxl foc: 22/23*29/16 = 1,894886364
2nd gear xxl foc & swap mod: 23/22*29/16 = 1,733695652

so swapping to xxl output gears in the lst2/afershock tranny(1,89) gives almost the same reduction as the gear swap mod in the lst2 tranny(1,91)

Originally Posted by drkdgglr

Losi XXL gearing:

the output gears in the xxl tranmisssion have a 29/16 ratio
2nd gear xxl foc: 22/23*29/16 = 1,894886364
2nd gear xxl foc & swap mod: 23/22*29/16 = 1,733695652

so swapping to xxl output gears in the lst2/afershock tranny(1,89) gives almost the same reduction as the gear swap mod in the lst2 tranny(1,91)

Brian,
I see you've added these, but in the wrong order. The 'XXL 2nd gear FOC' has the 'XXL 2nd gear FOC swap mod' ratios and vv.