I'd like to share this with everyone of you, I am pretty sure you already talked about it but would like to understand if my thoughts are right.
Let's start with these statements:
- Manufacturers do provide normally the maximum load capacity of a mount.
- I do know that a certain pair scope/mount is working fine 8reference scope/mount)
Therefore, if I take a Scope/Mount combination and I calculate the moment of inertia for this setup, I can think that all the Scope/Mount which have a moment of inertia lower or equal the reference Scope/Mount and the weight does not exceed the one specified by the manufacturer, I am fine.
The moment of inertia for a bar with a central fulcrum is barely:
where m is the mass (well weight in our case) of the scope and l is its physical length.
From this formula, for my mount (Tak EM200) I get this table for some scopes:
Scope Weight Length Inertia FSQ85 3.9 0.645 0.135208125 VC200L 6 0.62 0.1922 GSO8 6.2 0.58 0.173806667 Edge HD800 6.35 0.432 0.0987552 FSQ106 7 0.675 0.26578125 RH200 8.4 0.5 0.175 TEC140 8.6 0.98 0.688286667 Edge HD925 9.53 0.559 0.248161994 AG10 12 0.81 0.6561 ODK10 12 0.475 0.225625 Edge HD1100 13 0.61 0.403108333 IKHAROS10 15 0.64 0.512
The TEC140 is proofed to be working fine with the Em200 for photographic purposes, so I take it as reference.
Am I reaching a wrong result?
From this result for instance I can put an Edge HD1100 on my mount, but not for instance an AstroTech RC 10" (which would have an inertia higher then the one of the TEC140, not listed here).
What do you think about it?
Thanks a lot for your valuable feedback