M-19 Turntable?

[Kevin Page <kbpage@richmond.infi.net>]

I am in the R&D stages for an M-19 mechanical turntable.  Has anyone
seen one that works and does not hang too low?  My conceptual idea is to
use a Nissan (1,060 kg/2,337lb) mechanical scissor jack with a swivel
head.  I feel the jack will handle the load okay.  Having great concern
about things that hang down under motorcars, I want to make the
application safe and removable with speed and efficiency.  The jack
platform will be made up of two pieces of two inch 1/4 inch thick box
tubing with a piece of 1/2 inch thick plate welded between them for the
jack mounting making an H configuration.  On the car, I'll have to re
enforce the center cross beam (angle across the center of the car) and
mount fixed receiver tubes for the jack platform box tubing ends with
the front cross beam, also re enforced, of the car  making the the
pinned securement for the front of the platform tubes.  The front cross
member will have two down facing pieces of C channel with holes in them
for through quick connect pins.  The logic of the pins is to stabilize
the platform to the car in case of an uneven load or turning area.  The
receivers on the center beam will have some play (like your trailer
hitch receiver) but I hope that the tolerance won't be bad enought to
allow for instability.  I have seen this application (only welded to the
frame) on another car but not on an M-19.   The car I want to put it on
is an M-19 ex Southern Rwy. with a steel box cab and muffler.   Due to
the weight of the steel cab,etc., the center point is not in the best of
places...between carb and the crank case!  Working around or alongside
the flywheels has created the challenge.  Any suggestions?

Kevin Page