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07172015, 07:43 PM  #1 
Newbie Join Date: Jul 2015 Location: Sydney Australia
Posts: 41
 Motor T Figure  Land Speed
In EeePee's CR01 Thread he posted a chart that showed the RPM/Volt Revs Per Minute per Volt of Various Turn Motors As Such. Originally Posted by EeePee Holmes Hobbies has a great little chart I can refer to: Motor speeds (taken from random and averaged sample @ zero timing & 3100rpm): 10t = 6526 rpm/volt 15t = 4317 rpm/volt 17t = 3753 rpm/volt 20t = 3216 rpm/volt 21t = 3082 rpm/volt 23t = 2790 rpm/volt 25t = 2588 rpm/volt 35t = 1565 rpm/volt 45t = 1210 rpm/volt 55t = 987 rpm/volt 65t = 837 rpm/volt That's Per VOLT so if you use 7.2 Volt then multiply those Figures by 7.2 to get your Motors Total RPM. I sat and calculated these figures to Actual land speed via the Gearbox Ratio and how many times the wheels actually turn per minute, and then the wheel circumference to get how far that many turns will take you. Multiplied by 60 to get a figure in speed/hr This is also assuming that the Diffs don't then provide a different Ratio again. Bear with me I am Aussie so I use Metric figures 10t = 6526 rpm/volt x 7.2v = 46980rpm Multiply that by 60 (Minutes) = 2818800 Revs per Hour Divide the R.P.H by Standard Gearbox Ratio of 40.5 = 69600 Revs per Hour for the actual Wheels. Wheel Radius including tyres is approx 6 centimeters (cm) This gives a Wheel Circumference of 37.7cm approx So Multiply 37.7cm by 69600RPH = 2623920cm/hr Divide 2623920cm by 100 (100 cm per Meter) = 26239.2 meters/hr Divide that by 1000 (1000 Meters per Kilometer Km) = 26.2km/hr approx. or 16.3mph for you Imperial guys. I will do Each of the Motors listed with Kmh and Mph figures. All are approx. rounded to nearest percentage figure 10t = 6526 rpm/volt = 26.2Kmh  16.3Mph 15t = 4317 rpm/volt = 17.3Kmh  10.7Mph 17t = 3753 rpm/volt = 15.1Kmh  9.4Mph 20t = 3216 rpm/volt = 12.9Kmh  8Mph 21t = 3082 rpm/volt = 12.4Kmh  7.7Mph 23t = 2790 rpm/volt = 11.2Kmh  6.9Mph 25t = 2588 rpm/volt = 10.4Kmh  6.5Mph 35t = 1565 rpm/volt = 6.3Kmh  3.9Mph 45t = 1210 rpm/volt = 4.9Kmh  3Mph 55t = 987 rpm/volt = 3.9Kmh  2.4Mph 65t = 837 rpm/volt = 3.4Kmh  2.1Mph Now if you want a Trail Rig like I do and wish to walk along with it then you'd best look at a 55T motor maybe a 45T depending on your walking speed as Average walking speed is apparently approx 5kmh  3.1Mph I think I need a Lie down now after that 
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07272015, 12:44 AM  #2 
Newbie Join Date: Jul 2015 Location: Sydney Australia
Posts: 41
 Re: Motor T Figure  Land Speed
Anyone agree or disagree with this. Hoping I understood the info correctly and made the right calculations 
08132015, 07:10 AM  #3 
Newbie Join Date: Jul 2015 Location: Sydney Australia
Posts: 41
 Re: Motor T Figure  Land Speed
LOL Last edited by Green Meanie; 08132015 at 07:15 AM. 
08132015, 12:38 PM  #4 
I wanna be Dave Join Date: Sep 2008 Location: PA
Posts: 11,053
 Re: Motor T Figure  Land Speed
There are very few of us still playing with CR01s on this site. You'll see a lot of tumbleweeds in this entire section.

08142015, 02:46 AM  #5 
Newbie Join Date: Jul 2015 Location: Sydney Australia
Posts: 41
 Re: Motor T Figure  Land Speed 
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