Pusher Trailer (new build)

[lowracer]

Having had this engine on the front wheel, then on the rear wheel, then on some skateboard wheels(bad idea), then back on the front wheel, I decided to do a pusher trailer.
I invite any and all opinions on the best methods of trailer hookup?
This is geared for the ~50 mph range but will rarely get pushed that fast.
I did some research & still haven't settled between seatpost mount or axle mount.
The tandem brake cable came in the mail a few days ago, so the throttle hookup & bike interchangeability will be a snap.
Here is what I've got put together so far.
-Lowracer-

 

[bodged bikes]

I'm working on one now that will be axle mounted. I will be using a 10mm threaded rod (McMaster #98861A530) to replace the hollow axle in my Shimano rear hub. The trailer will attach with 10mm rod ends (McMaster #59935K84) slipped over the threaded rod. A vertical pivot will be located between the bike and trailer. The result will be similar to this Nashbar trailer

 

[lowracer]

bodged bikes,
Very cool...I get stuff from Mcmaster Carr & love that company.
Here are a few more pics as I've just about completed it today.
Using just bike parts, scrap metal, nuts & bolts & a skateboard wheel for belt tensioner. Yeah its a carbon road fork...lol
Just need to hook up the throttle cable & re-install the muffler.
I took it for a test drive unmotored & everything is functioning properly as far as turning & bumps go.
-lowracer-

 

[bodged bikes]

Excellent! A very creative recycling of an unused fork and hub.

 

[lowracer]

BB,
Thanks.
I really like trying to come up with ways to use old bike parts that are littering up the garage in ways to solve mechanical challenges. I may switch the mounting system to rear axle to see how it handles & 'feels'. The long arm connecting trailer to seatpost has a bit of flex either in the arm itself or the mount to the trailer which is another bike stem (or a combination of the two) which I'm not comfortable with especially if I go fast. If I dont go axle mount, I'll definitely shorten up the distance I got it at now since its a bit long. Always easier to remove than add I always say...lol
-lowracer-

 

[lowracer]

Rode the bike w/motorized trailer today after tightening the tongue area up.
Hate to say it , but I'm not loving the pusher trailer layout & will be taking it all apart again. Feels like driving a tractor trailer (or maybe a tandem bicycle) & not what I expected. It was cool to build & test it out however.
-lowracer-

 

[bodged bikes]

Feels like driving a tractor trailer (or maybe a tandem bicycle) & not what I expected. -lowracer-

It does feel very different having a trailer pushing rather than being towed. The understeer in a turn is very noticeable under power.

 

[Rgvkid]

The engine is mounted to high. You'll have problems with the ergonomics. Use a smaller wheel and lower the engine, that will help with stability performance.

 

[lowracer]

I'm giving the pusher trailer idea another go & have started to post my ideas & plans here. http://www.motoredbikes.com/showthread.php?t=36230
-Lowracer-

 

[colinbirdman]

Having had this engine on the front wheel, then on the rear wheel, then on some skateboard wheels(bad idea), then back on the front wheel, I decided to do a pusher trailer.
I invite any and all opinions on the best methods of trailer hookup?
This is geared for the ~50 mph range but will rarely get pushed that fast.
I did some research & still haven't settled between seatpost mount or axle mount.
The tandem brake cable came in the mail a few days ago, so the throttle hookup & bike interchangeability will be a snap.
Here is what I've got put together so far.
-Lowracer-

I like your set up. How does the cycle wheel compare to a smaller driving wheel? I am looking at a 35cc pusher motor. What is the best HP output and size for a pusher load 75kg plus pusher and bike? The toothed belt loooks efficient is it?