1/16 Scale speed -> Yellow TT 1:48 gearbox - Reasonable?
Posted: Tue Apr 18, 2023 9:22 pm
Hey all!
So im now working on my first 1/16 tank, doing a panzer 2.
For motors im currently looking at the common Yellow TT gearboxes with a 48 to 1 ratio as a possible motivational force.
My intent is to use separate ESCs and a 2s lipo.
Looking at some vids the gearbox seems to do about 250rpm at 7volt without any load.
Putting that and a drive sprocket diameter of 58mm into a wheel speed calculator gives very close to 3km/h, multiplied by 16 for the scale gives a scale speed of 48km(h which is in the just above ballpark for a panzer 2, with the load from the weight of the tank it will probably be right in the ballpark.
With the space constraints im working in i may need to do a gear on the output shaft from the gearbox to the shaft of the drive sprocket to move the gearbox back a little in the hull so i will easily be able to further gear it down a bit.
So my questions on this are:
Did i get the speed calculation right?
Should i further gear it down? (as i guess top speed isnt something one expects to be driving scale tanks at)
and
does anyone have experience and opinions on the yellow TT gearboxes?
Thanks!
So im now working on my first 1/16 tank, doing a panzer 2.
For motors im currently looking at the common Yellow TT gearboxes with a 48 to 1 ratio as a possible motivational force.
My intent is to use separate ESCs and a 2s lipo.
Looking at some vids the gearbox seems to do about 250rpm at 7volt without any load.
Putting that and a drive sprocket diameter of 58mm into a wheel speed calculator gives very close to 3km/h, multiplied by 16 for the scale gives a scale speed of 48km(h which is in the just above ballpark for a panzer 2, with the load from the weight of the tank it will probably be right in the ballpark.
With the space constraints im working in i may need to do a gear on the output shaft from the gearbox to the shaft of the drive sprocket to move the gearbox back a little in the hull so i will easily be able to further gear it down a bit.
So my questions on this are:
Did i get the speed calculation right?
Should i further gear it down? (as i guess top speed isnt something one expects to be driving scale tanks at)
and
does anyone have experience and opinions on the yellow TT gearboxes?
Thanks!