RAH'er has forced landing

"Corky Scott" wrote in message ...
On Wed, 22 Dec 2004 03:11:51 GMT, "Blueskies"
wrote:

Doesn't the 'mazda' rotary mnimize this pulsation?

Not if the Powersport saga is to be believed. Their initial efforts
resulted in a LOT of psru failures.

See:
http://www.powersportaviation.com/Ho...on%20drive.htm

Ross Aero, on the other hand put together a planetary gear design and
seemed to suffer no torsional problems at all. They told me that some
engineer stopped in to tell them that he'd analized their reduction
unit and claimed that it would destructively vibrate at 300 rpm. Of
course the engine only sees that rpm during startup or shut down. The
rest of the time it's operating well above that.

The Ross Aero psru is what Tracy Crook initially used in his Mazda
powered RV-4. I gather he substantially modified it since then and
may now offer one of his own.

Corky Scott


I remember someone talking about a damper that was filled with steel shot or similar, but I cannot find a reference to
it now.

On Wed, 22 Dec 2004 22:39:59 GMT, "Blueskies"
wrote:


"Corky Scott" wrote in message ...
On Wed, 22 Dec 2004 03:11:51 GMT, "Blueskies"
wrote:

Doesn't the 'mazda' rotary mnimize this pulsation?

Not if the Powersport saga is to be believed. Their initial efforts
resulted in a LOT of psru failures.

See:
http://www.powersportaviation.com/Ho...on%20drive.htm

Ross Aero, on the other hand put together a planetary gear design and
seemed to suffer no torsional problems at all. They told me that some
engineer stopped in to tell them that he'd analized their reduction
unit and claimed that it would destructively vibrate at 300 rpm. Of
course the engine only sees that rpm during startup or shut down. The
rest of the time it's operating well above that.

The Ross Aero psru is what Tracy Crook initially used in his Mazda
powered RV-4. I gather he substantially modified it since then and
may now offer one of his own.

Corky Scott


I remember someone talking about a damper that was filled with steel shot or similar, but I cannot find a reference to
it now.


I can't recall the name, but they were used by Molt Taylor in his
pusher designs and were also used with the Honda Civic engine in some
BD-5s

Ed Sullivan

On Wed, 22 Dec 2004 16:25:23 -0800, Ed Sullivan
wrote:

On Wed, 22 Dec 2004 22:39:59 GMT, "Blueskies"
wrote:


"Corky Scott" wrote in message ...
On Wed, 22 Dec 2004 03:11:51 GMT, "Blueskies"
wrote:

Doesn't the 'mazda' rotary mnimize this pulsation?

Not if the Powersport saga is to be believed. Their initial efforts
resulted in a LOT of psru failures.

See:
http://www.powersportaviation.com/Ho...on%20drive.htm

Ross Aero, on the other hand put together a planetary gear design and
seemed to suffer no torsional problems at all. They told me that some
engineer stopped in to tell them that he'd analized their reduction
unit and claimed that it would destructively vibrate at 300 rpm. Of
course the engine only sees that rpm during startup or shut down. The
rest of the time it's operating well above that.

The Ross Aero psru is what Tracy Crook initially used in his Mazda
powered RV-4. I gather he substantially modified it since then and
may now offer one of his own.

Corky Scott


I remember someone talking about a damper that was filled with steel shot or similar, but I cannot find a reference to
it now.


I can't recall the name, but they were used by Molt Taylor in his
pusher designs and were also used with the Honda Civic engine in some
BD-5s

Ed Sullivan
They were made by Dodge Power products, and I think they were called
FlexiDyne?

wrote in message ...
On Wed, 22 Dec 2004 16:25:23 -0800, Ed Sullivan
wrote:

snip

I remember someone talking about a damper that was filled with steel shot or similar, but I cannot find a reference
to
it now.


I can't recall the name, but they were used by Molt Taylor in his
pusher designs and were also used with the Honda Civic engine in some
BD-5s

Ed Sullivan
They were made by Dodge Power products, and I think they were called
FlexiDyne?


BINGO---
http://www.dodge-pt.com/products/pt_...flexidyne.html

"Ed Sullivan" wrote in message
...
On Wed, 22 Dec 2004 22:39:59 GMT, "Blueskies"
wrote:
(snip)

I remember someone talking about a damper that was filled with steel shot
or similar, but I cannot find a reference to
it now.


I can't recall the name, but they were used by Molt Taylor in his
pusher designs and were also used with the Honda Civic engine in some
BD-5s

Ed Sullivan


Dodge Flexidyne dry fluid coupling.

http://www.dodge-reliance.com/pdf/ma.../flexidyne.pdf

http://www.mini-imp.com/drive_train_and_starting.htm
-Bob