"Wayne Paul" wrote in message
m...
Or you could weigh the aircraft without the pilot. Then with the pilot.
Take the difference in the tailwheel weights and multiply it by the distance
between the tail wheel and main mounts. Divide the product of the
calculation by the pilot's weight. The result will be the distance from the
main mount to the pilot seat.

See paragraph B in the W&B calculation near the bottom of the following
link:
http://www.soaridaho.com/Schreder/Sc...976_HP-18.html

Wayne
HP-14 6F
http://www.tinyurl.com/N990-6F


--------------new post begins---------

Remember to first level the aircraft.

Assuming that it is not an original design, there should be a recomended
datum line specified for that purpose.

(Also, please use the axle positions rather than the undercarriage mounting
positions.)

Peter