Speed Calculator

[Bmr4life]

Originally Posted by nitrostarter

Correct, the X2 truggy has 43/10 differentials.

Oh ok, I choose CRT which must have been X1.

How's this look?

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 14
Total Voltage: 14.8
Motor KV: 2200
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.006
Spur/Pinion Ratio: 3.43 : 1
Total Ratio: 14.74286 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 1.20:1
Total Motor Speed: 32560 RPM
Vehicle Speed: 37.12 mph (59.63 km/h)
Effective KV Value: 2200
KT constant: 0.61 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

Originally Posted by nitrostarter

Correct, the X2 truggy has 43/10 differentials.

I believe the X2 truggy has 45/10 diffs.

[Bmr4life]

Originally Posted by drkdgglr

I believe the X2 truggy has 45/10 diffs.

I believe you're right. According to the spare parts list, they are 45 tooth bevel gears. That said, the speed calculator doesn't have 45/10 as an option.

[BrianG]

If the differential is not listed, simply put the ratio into the box manually. For 45/10 diffs, that would be 4.5

[Bmr4life]

Jammin X2 CRT

Differential Ratio: 4.5
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 14
Total Voltage: 14.8
Motor KV: 2200
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.006
Spur/Pinion Ratio: 3.43 : 1
Total Ratio: 15.42857 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 1.15:1
Total Motor Speed: 32560 RPM
Vehicle Speed: 35.47 mph (56.98 km/h)
Effective KV Value: 2200
KT constant: 0.61 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

And how about this one using 6S power with a 2200kv?

Differential Ratio: 4.5
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 12
Total Voltage: 22.2
Motor KV: 2200
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.006
Spur/Pinion Ratio: 4 : 1
Total Ratio: 18 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 0.99:1
Total Motor Speed: 48840 RPM
Vehicle Speed: 45.61 mph (73.26 km/h)
Effective KV Value: 2200
KT constant: 0.61 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

[George16]

Originally Posted by drkdgglr

I believe the X2 truggy has 45/10 diffs.

I agree. I have the X2 and it has 45/10 diff gears.

[Aero]

hiya brian. just had to say its a piece of art, and very useful for may people. the rc calculator. although a connect with progressiveRC and potential other databases, didnt bear fruit, its still a very handy tool, when the head computing seem to go slow.and planning is great...hope to see a new tool emerge from these potentials some day.

Much appreciated that its getting updated now and then, making it responsible work of art..use ful art :)
edit: sorry had an work/art/tool problem, bad english..surprise!

[BrianG]

Just trolling my referrer URLs on my server to see where traffic is coming from and noticed a bunch of hits from the Tekin website (towards the bottom on right where it says "How fast will it go").

[Metallover]

Awesome! Congrats Brian! Just goes to show how useful your site is.

I`m working on a 1/5 on road revo http://www.rc-monster.com/forum/showthread.php?t=27755

Will this work?remember it will be light!

Differential Gear Ratio 2.8 revo
Transmission Gear Ratio 2.5
Other Ratio: 1
Spur Gear tooth count 40
Pinion Gear tooth count 21
Total Voltage 12.6
Motor KD36-74-06XL 2800kv
Tire Diameter 5.1 on road tire
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.0042
Spur/Pinion Ratio: 1.9 : 1
Total Reduction Ratio 13.55311 : 1
Rollout: 1.18:1
Total Motor Speed 33986.4 RPM
Maximum Vehicle Speed 38.05 mph (61.12 km/h)
Effective KV Value: 2800

[BrianG]

Update:

I started the process of porting the data from arrays to xml files. What a PITA. So far, the XML files are done, and the code to parse them is done, but I have to adjust a lot on the new pages before the whole site is done.

The current site still uses the old scheme, so nothing changed there yet. However, now there are several XML files available. The information is freely available, but if I start seeing bandwidth limits being hit, I'll have to change that.

The xml files are:

• Transmissions
• Motors
• Tires
• Spurs
• Differentials

[SnoopMaxx]

Your work is highly appreciated
I use your calculator at least 10-15 times a week if not more


Morten

[jhautz]

If you made an iphone app I would totally pay for it brian just something to think about

[BrianG]

Thanks snoop

Jhautz: Sorry. I don't have an iPhone, nor do I plan to ever get one. But don't they render webpages as-is? If so, why is an app needed?

These new XML files make it easier if people want to build such an app, but use a central data store (and without needing server-side coding).

[Arct1k]

You can actually load the app/site onto the phone - I've done that :)