below is a photo of a similar trailer I bought at a second hand store. the trailer I used is several years older and is made by Burley. the trailer I used is rated for a maximum of 100 lbs. I am real close to that maximum with the two group 31 deep cycle batteries. I will be installing much smaller Batteries soon. this will lighten up the load and make it easier on the motor and me when pedaling.
The bike handles surprisingly well considering the 100 lbs I am pulling behind me. when the motor powers up it doesnt seem to be squirmy at all to my surprise.
I was able to reach a speed of 20 mph on flat level ground with this set up.
I am not sure of the range but I was able to ride more than 5 miles with continuous push from the trailer and I am sure i could have gone another 5 miles.
With the smaller batteries I should be able to go a bit faster and close to the same range.
Below is a photo of the 24 VDC motor salvaged from a Black-n-Decker electric lawn mower.
The Gear box is from a old dead Murray riding lawn mower. it is a 4/to 1 gear reduction
The front and rear sprocket is from a junk kids bike.
Blow is a photo of the Pulley system used to drive the gear reduction from the motor shaft Ya I know I need to cut off the screws sticking through the 3/4 inch plywood
Hear you see the top view of the 24 volt DC motor and the two solenoid switches wired in series. this way if one of the switches sticks the other one will more than likely shut off. I know this is a simple way of doing it and there are better ways of doing it but I was doing this on the cheep. there are safety problems with the set up you see here. So don't email me telling me that "that trailer is not safe."
Below you see a power disconnect for the switch that controls the solenoid on the motor.
This is the temporary switch I used to try out the whole concept for this EV pusher trailer.