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Old 01-16-2003, 08:05 AM   #1
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Default Tamiya Evolution III & 2-Speed Trans

Just got mine built!!!! Had a few questions:
1) Was wondering if a two speed would work. I also Have a electric boat with 4 neo motors and 4 tranmsission and the thing launches around the corners going from a 1:6 ratio in first gear to 1:1 ratio in second gear. I attached a picture of the two speed and some specs:
*****Powered by the advanced gearing system, NOVA Two Speed Gear Box is able to greatly improve both speed and torque of RC Cars. It provides racers with more steering control over sharp corner as well as the speed necessary for straight tracks. Power consumption and acceleration time is decreased to allow the car to reach max speed faster while providing a longer run time. This is a perfect gadget for racers who want to reach the highest performance and beyond.
*****Dimension 36.5 X 21mm
Voltage 6V ~ 12V (5 ~ 10 cells )
Weight 48G
Gear Ratio (Low speed) 1.6 : 1
Gear Ratio (High speed) 1 : 1
Operation Forward, Brake
*****-Nova Two Speed is an one-piece design, it is easy to assemble and is suitable for most kinds of RC cars.
-Torque and performance have been improved by the advanced gearing system. Power consumption is lower to provide a longer run time.
-Direct power transmission during high speed reduces the friction between gears. The car can run faster & more controllable, especially in high speed cornering.
-There are clockwise & anti-clockwise revolution in the gear box. Use different combinations with different types of cars.


2) Good recommended set-up for a medium size track with one straight away and on asphault - Thanks
Attached Images
File Type: jpg twospeed.jpg (48.0 KB, 1470 views)
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Old 01-16-2003, 08:42 AM   #2
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it will probably fit in the car but 2speeds are not legal in most racing situations, unless your local track allows them
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Old 01-16-2003, 08:59 AM   #3
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our local races allow them - I was just wondering would this be better since the track I race on is a tight curvy track.
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Old 01-16-2003, 04:55 PM   #4
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for electric I don't think it would help unless the track had both a very tight section and a very open section or really long straight
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Old 01-16-2003, 05:00 PM   #5
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Where is it available and how much is it?
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Old 01-16-2003, 05:54 PM   #6
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i remember when u could by a two speed kit for hpi mini, rs4 1-2 and mt. it looked just like a nitro one.

however i think eletric do not need two speed
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Old 01-17-2003, 12:27 AM   #7
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That would be cool, however I don't think it would be very beneficial except for drag racing applications. Electric motors spool up so quickly that when geared properly there is very little time between 0 and full speed....... The problem the RS4 2-speeds had was that 1st gear was slightly undergeared and 2nd was dramatically overgeared.... This little booger isn't that way cause you place the pinion on the output shaft and 2nd is 1:1 so you slightly overgear and 1st speed is severely undergeared..... This would work better on high RPM motors with little torque. High torque/low RPM motors may never have enough to get teh cluch to engage.....
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Old 01-17-2003, 01:06 AM   #8
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hm.. imho even if u can get those kind of speeds....... u cannot control or handle the car....... try 9 turn with 4.5:1 FDR ... think u get the idea ....

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