[NSRCA-discussion] Hyde mount question

[John Pavlick]

I'm setting up a new airplane with a Hyde "Firm Idle" Type 'C' mount. I'm using an OS 120 Ax for this particular installation. There are a few sets of mounting holes on the beams. The OS 120 lines up with 2 of the 3 sets. One is located more forward than the other. I'm wondering which set of holes I should use. From what I understand, this is a "universal" mount and depending on which engine you use and which holes you use, you should end up at the same installed length. That way, theoretically, you can install the mount and swap engines without changing the spinner -> firewall distance.
Has anyone used this mount and if so, what is the "standard" installed length? 

John Pavlick
http://www.idseng.com
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