|
E-drive kit |
|
An Electric assist
bike project by
Matt Shumaker |
|
E-cumbent Page1
E-cumbent
page 2
|
Due to the overwhelming interest
in Matt's electric recumbent hotrod, Matt has decided to
design and sell RC motor based drive units. He has gone
through several iterations which can be seen on this
long thread on the
endless-sphere discussion list.
Matt says: "I have had a large
number of queries about making RC motor drives available for
purchase. I have started that process and am making single
and dual stage drives right now."
|
 |
8/26/08
Here is the first single stage drive unit. This one will use
a belt to reduce the RPMs from the motor to a chain drive
cog. It will require a huge chainring on the drive wheel.
This design did not make it to production. |
11/22/08
Here
is a rough drawing of the two stage drive layout. It uses a
belt to step down from the high speed RC motor to an
intermediate drive, and then uses a chain to step down to
the chain drive cog which will drive the rear wheel. This
system is unique in that it can fold to allow it to fit onto
a wide range of bikes. |
 |
 |
Here are some completed
second stage drive parts just out of the HAAS CNC. |
| Matt is having
E-bike specific brushless outrunner motors manufactured to
his specs. He hopes to have them available for sale by spring! |
 |
 |
2/22/09
Here's one of the single stage drive units that Matt
completed. It has a massive RC motor, and a freewheel
assembly built into the large pulley. He had the aluminum
black anodized.
Picture 2
Picture 3 Picture 4
Picture 5 |
| Here's another single stage
unit, with a smaller RC motor. Very compact.
Picture 2
Picture 3 |
 |
| |
|
More soon.
|
| If you have any
questions, feel free to email Matt at
shumaker@owc.net
-Matt |
