Back 73/74 used a sheet J2 rubber job , with ' slot car ' set up .
Slot car motor , a propellor
![Hugh %^@](https://stunthanger.com/smf/Smileys/classic/icon_2.gif)
20 litre drum full of rocks ( it rocked a bit
![Layingdown LL~](https://stunthanger.com/smf/Smileys/classic/side_laugh.gif)
) slot car speed controller , and 12 V car battery or S. Car Transformer .
Two ball races on the stick got the electrickery thru , rotationally .
![](https://cdn.instructables.com/FZK/QT1W/H8CVK88L/FZKQT1WH8CVK88L.MEDIUM.jpg)
This ones the same principle as the antique one ;
![](https://cdn.instructables.com/FIT/BVXU/I2ELZF32/FITBVXUI2ELZF32.MEDIUM.jpg)
Thought a combination of the two ( three car batterys , 36 Volt for voltage drop on 60 ft lines )
Would be lighter than batterys in aeroplane .
Might need a third wire in case the lines shorted out .
At least the motor would stop if the lines melted .
And Wonders , a wheeled trolley for the batteries might make proceeds somewhat less arduous .