Transmissions

[Aero 9000]

Originally Posted by scalelover

Even with these pics you can see its nearly impossible to have an interior, especially in a day cab. I really dont even see a way in a conventional or an extended sleeper without figuring out a way to lay it on its side.

--Dan

I will have to say having a interior was not a priority when designing this transmission. For me personally it is not a priority at all. I don't see the need to make the cab comfortable for a 5 inch hight plastic man. The cab interior is far better utilised for equiptment. If cab interiors are a priority it may be more suitable to build a static model.

The transmission connot be laid on its side. It contains automatic transmission fluid. It would make a awfull mess, not to mention oil up the motor......

[sparkycuda]

One difference between 1:1 and our equipment is the prime mover RPM. Diesel engines have a very narrow power band and low max RPM, requiring multi-gears to match available power/torque and road speed. Our electric motors have a considerably wider RPM range, depending on turns, etc. I chose a low RPM 85t motor for my Payhauler. It turns 5200 RPM at 7.4V, so is about double the diesel engine RPM in the real truck. By using a 3-spd trans, I just about replicate prototypical road speed, since the 1:1 had a 6-spd trans. Lower turn motors spin a lot more RPM, reducing the actual need for a many-gear trans - use of one speed or a 2-spd trans works just fine since we seldom see anything like scale speed (70 MPH) with our trucks.

But then, nothing beats shiftin' those cogs 9 times going across the room! To each his own - just have fun doin' it.

Ken

[Aero 9000]

Originally Posted by sparkycuda

One difference between 1:1 and our equipment is the prime mover RPM. Diesel engines have a very narrow power band and low max RPM, requiring multi-gears to match available power/torque and road speed. Our electric motors have a considerably wider RPM range, depending on turns, etc. I chose a low RPM 85t motor for my Payhauler. It turns 5200 RPM at 7.4V, so is about double the diesel engine RPM in the real truck. By using a 3-spd trans, I just about replicate prototypical road speed, since the 1:1 had a 6-spd trans. Lower turn motors spin a lot more RPM, reducing the actual need for a many-gear trans - use of one speed or a 2-spd trans works just fine since we seldom see anything like scale speed (70 MPH) with our trucks.

But then, nothing beats shiftin' those cogs 9 times going across the room! To each his own - just have fun doin' it.

Ken

Yes Ken.....you got it...... to each his own...!!

I've been experimenting with 12volt RS555 motors running on 7.2 volts.
In that configuration they act more like the diesel, it's more of a challenge to drive, and more realistic, they drive like a truck instead of a sports car.....the spin off is the batteries last for ages...