Boeing's Electric Taxi Motor

On Tue, 13 Sep 2005 16:17:02 GMT, Kyler Laird
wrote in ::

Larry Dighera writes:

A motor in the hub design is the most elegant solution. I wouldn't
have thought the motor would have sufficient torque to drive the
wheels without adequate gear reduction.

Exactly - the much higher than usual (5x) low-speed torque of the
Chorus motors are what make them so appropriate for this application.
I wish I had a kit for my Aztec!

Even at 5X torque, it would seem that some gearing would be necessary
for a small motor to move an airliner. But there may be a way to
build that into the hub also.

I got interested in BOREF for their licensing of Cool Chips
http://www.coolchips.gi/
to keep avionics and turbine engines(!) cool. I think that's going
to take awhile to develop. The motors are much more immediately
exciting.

--kyler

Wow! That is a breakthrough. Thanks for the information.

On 2005-09-13, Larry Dighera wrote:
Even at 5X torque, it would seem that some gearing would be necessary
for a small motor to move an airliner. But there may be a way to
build that into the hub also.

Probably a planetary gear set. The motor's casing (if the armature is
held still and the case allowed to rotate) could form the sun gear.

--
Dylan Smith, Castletown, Isle of Man
Flying: http://www.dylansmith.net
Frontier Elite Universe: http://www.alioth.net
"Maintain thine airspeed, lest the ground come up and smite thee"

Larry Dighera writes:

Even at 5X torque, it would seem that some gearing would be necessary
for a small motor to move an airliner. But there may be a way to
build that into the hub also.

http://www.wallstreetcorner.com/stockpick.html

I signed a non-disclosure agreement, & was therefore able to
view actual tests on the product -- all I can say is that it
is amazing.

The WheelTug(TM) drive can fit within the existing nose wheel
hub of a 767-class aircraft, with the goal of largely
eliminating the use of tow tugs & jet engines in moving
aircraft on the ground.

[...]

An economic analysis by WheelTug plc estimates that a typical
WheelTug System would have a net present value to airlines of
over $6 million per airplane

Yeow!

--kyler

Looks to be very encouraging despite the acknowledgement on the site
that they still have some engineering hurtles to overcome. When they
get a flight ready test package put together I'll be real curious as to
how they do the final integration and structural installation, as well
as powering it.

Craig C.

wrote in message


......I'll be real curious as to
how they do the final integration and structural installation, as well
as powering it.

Power it from the onboard APU.

John Gaquin wrote:
wrote in message

......I'll be real curious as to
how they do the final integration and structural installation, as well
as powering it.

Power it from the onboard APU.

Yeah, that much I had figured out....what I was meaning is, are the
drives going to be run off of some high voltage AC or DC or run from
already common 28 VDC or 115/400 3p that the APUs can already develope.

On Tue, 06 Dec 2005 22:17:02 GMT, Kyler Laird
wrote in ::

An economic analysis by WheelTug plc estimates that a typical
WheelTug System would have a net present value to airlines of
over $6 million per airplane

Yeow!

Thanks for the updated information.

In the last year CHOMF has been selling between $5 and $20, and is
currently $7/share. It looks like a good investment to me.