Re: [ATM] Size does matter

["Arjan te Marvelde" <arjan.te.marvelde@hetnet.nl>]

Jeff,

You need some more input to calculate this. Assuming that the two pounds is
at the eyepiece, it matters where you are looking. Max arm when at horizon,
i.e. 24" x 2 lbs.

Then you would need the total weight of the scope (OTA), and the angle
(w.r.t. vertical) of the pads in the RA bearing to calculate the normal
force (or weight, which in this case can also be used, provided you do this
consistently). Mutiply weight, 0.04, 1/cos(angle) and the trunnion diameter
to get the force (weight?) couple. This should be larger than the worst case
calculated above, i.e. 48 " lbs in your example.

Hope this helps?

/Arjan

_______________________________________________
ATM mailing list http://www.atmlist.net/