If you think there is 10 lbs to save in Tracy's PSRU, that's huge
considering CG and all...If someone is willing to get the necessary
components that can be whittled and you direct in the ares to be machined, I
would be willing to do this for a very small sum to cover the tooling and
possibly the fixture material, about $200.  NO other machine shop would
touch something like this for under $1000 .................

thanks

jeff

I'm interested! My psru still in the crate.
C. Smith


Here is another way Jeff. We rejected this idea a few years ago because of
excessive cost. The cost on NC milling has come way down recently.

The big weight savings is it combines the schertz beam with the adapter
plate. A schertz beam alone weighs up to 9 pounds depending on the length.
Bob White tested it for us in a crash.

The right side can be much shorter to accommodate a rad on the cool side of
the engine. I'll do a suggested dwg for you. It is a half inch thick. Jerry
Hey tested it for deflection and Jarrett did an FEA.

Paul


I will have bottom Radiator, and what looks like 25.98 between barry centers
if I read the drawing Paul made of the mount for me correctly.
So combo plate, then some shaving on the housing, what, 19 lbs saved???? 8-D
C. Smith

Not quite that much as some goes and some stays. I would say 15 pounds is
possible.
We should standardize on the asymmetric mount as it can be used with a
bottom rad or a right side side rad.

It will look something like this. I'll have to redo that zenair dwg if we
use this plate.


Paul Lamar


Standardization is cool, guess I'll have to find something to put there..
;-)
I just hope the dust settles before I start cutting steel.
Any chance of relocating starter on other side? Or at least having it as an
alternate layout in a drawing?
C. Smith


The reason the starter is over there because we need the metal anyway
so a hole for the starter kills two birds with one piece
of metal. However the starter can go anywhere you want if you weld
on a bracket for it. To keep the cost down we
need to standardize on something.

BTW in case nobody noticed this eliminates the cost of the steel schertz beam.

I am very happy that Jeff offered to do this so cheaply. I was always
a good way to go but too costly up until now. In the mean time the
cost of the schertz beam went up while NC mill technology got cheaper.

Here are a few more pictures.

Paul Lamar