02-11-2003, 06:26 AM
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6v battery=NOS!!
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Join Date: Jan 2003
Posts: 160
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Quote:
Originally posted by fuzzy2cell
You sure, because that doesn't seem right. I'll try that.
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My bad, nice job on the math, but how would you calculate dual battery or motor mods, or perhaps say a 6V BATTERY MOD!
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02-11-2003, 09:20 AM
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Clones Are Good
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Join Date: Jan 2003
Location: St. George, Utah, USA
Posts: 123
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That would be at the motor's rated RPM: no load. Not even a pinion gear. There is no practical way to average in power loss through gearing, extra rotational weight of the pinion gear, axle/wheels and tires, etc.
The only way to judge the speed is to clock it through a speed trap, unless someone has a radar gun. Treadmills are fairly accurate.
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02-11-2003, 11:13 AM
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My Alter Ego Is Retarded
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Join Date: Oct 2002
Location: Trashcan, I mean Ashland Ohio
Posts: 222
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The best way is to actually measure the speed. If you want calculations go to the MS website they have a calculator, but it only goes up to a 2.6 motor. It also dont work for multi cell or high voltage set ups.
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02-11-2003, 11:30 AM
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Clones Are Good
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Join Date: Jan 2003
Location: St. George, Utah, USA
Posts: 123
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Again, that does not take parasitic loss into account. It simply calculates from the motor's rated RPM in a frictionless fantasy world with no variables like conductivity, air density, voltage fluctuation.
Clock it!
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02-11-2003, 12:25 PM
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My Alter Ego Is Retarded
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Join Date: Oct 2002
Location: Trashcan, I mean Ashland Ohio
Posts: 222
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We get that Friction unsprung weight it takes away power, but if you want an idea of how fast your car goes use the math.
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02-14-2003, 04:35 PM
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Epoch's R Bett'R
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Join Date: Jan 2003
Posts: 652
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Okay, I just did a 3 cell (in the belly) mod on my new Zip Zap. This thing was faster than my 3 cell microsizer. It's set up with my favorite "super torquer" clone motor, and the blue (low) ZZ gearset. I do stress testing on people with heart conditons, so I use an $18,000.00 treadmill every day. I clocked my ZipZap at 7.5 mph. I wonder what it would do with the red ZZ (fast ) gearset...
Anyway, by your calculations for bits at 1/70 scale, it's running around 525 mph. BUT the car is slightly larger, so at 1/64 scale, it's running 480 mph. Either way, it's kinda fast. Oh yeah, it has enough torque to pull the front wheels for a bit, even with all 3 cells in the belly.
I think I'm gonna do a 4-cell twin engine Zip sometime...
ed
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02-14-2003, 04:36 PM
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Epoch's R Bett'R
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Join Date: Jan 2003
Posts: 652
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By the way, when I mean twin engine, I don't mean hooking one up to reverse and using 2 different motors. I mean use 2 identical motors, and hopefully get some INSANE torque.
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02-14-2003, 04:58 PM
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NSX Driver!
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Join Date: Feb 2003
Posts: 148
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if you can find the scale mph on any website divide it by 64 to get the speed.
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02-14-2003, 07:06 PM
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My Alter Ego Is Retarded
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Join Date: Oct 2002
Location: Trashcan, I mean Ashland Ohio
Posts: 222
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My 2 cell hit 5.5 mph today. Yahoo!
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02-14-2003, 11:06 PM
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Epoch's R Bett'R
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Join Date: Jan 2003
Posts: 652
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Okay, here's what I have found about Zip Zaps and high voltage... Don't try to run 4 cells! You will burn out your forward circuit. I put 4 cells in the belly of my ZZ and now I just have reverse. So I switched forward and reverse and now I have a 4 cell 3.8 motor drag racer. I just need a body to cover it. I think a P.T. Cruiser will cover it okay.
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02-18-2003, 04:20 PM
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Epoch's R Bett'R
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Join Date: Jan 2003
Posts: 652
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My ZZ 3 cell with red gears is going 7.8 mph with my faster clone motor. Not the Pink one, it's a little different.
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02-18-2003, 10:31 PM
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Hulk smash!
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Join Date: Jul 2002
Posts: 2,193
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Using Algebra, we can quite 'easily' find the speed for what ever distance you want to use as a measurement.
3 Steps...
1. Take the run distance (in feet) and multiply by 3600
2. Take that number and divide by your runtime (in seconds)
3. The answer is your feet per hour
- You can divide that by 5280 for actual MPH
- Or divide by 82.5 for Scale MPH.
If you want even SIMPLER...Setup up a run distance of 20feet 7.5inches and divide whatever your runtimes are from 900 and that's your scale mph!
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02-19-2003, 07:06 PM
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My Alter Ego Is Retarded
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Join Date: Oct 2002
Location: Trashcan, I mean Ashland Ohio
Posts: 222
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Great link, Thanks!
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transmission with a
Linear Mode
