jjsemperfi Posted May 22, 2012 Report Share Posted May 22, 2012 So on the slotted piece that the collective slides up and down on there are 4 rivets a little more than 3/4's the way toward the top. When you slide the collective up, you will eventually feel it pass those two sets of rivets and then you have about another inch of collective travel at the top. What are those rivets there for? Quote Link to comment Share on other sites More sharing options...
C of G Posted May 22, 2012 Report Share Posted May 22, 2012 It's been a long time, but I recall them being a near limit indicator. 1 Quote Link to comment Share on other sites More sharing options...
apiaguy Posted May 23, 2012 Report Share Posted May 23, 2012 Correct!The collective pitch friction guide has 4 rivets that provide a "limit feel" to the collective to warn of excessive collective pitch to preclude exceeding manifold pressure limits. If the friction is too tight it may be a little difficult to pull full pitch during full down exercises. This guide can be modified by completing service bulletin N-117.2 (Dual RPM and quiet operation configuration) This modification allows the 300C to operate in the 2800-2900 rpm range and provides increased collective pitch control at reduced rotor speed. 1 Quote Link to comment Share on other sites More sharing options...
nightsta1ker Posted May 25, 2012 Report Share Posted May 25, 2012 Interesting stuff. Thanks for posting! I learn something new about these things every day, whether I am flying or not! Quote Link to comment Share on other sites More sharing options...
jjsemperfi Posted May 26, 2012 Author Report Share Posted May 26, 2012 Do you know where I can find a copy of that service bulletin? I tried to Yagoogleize but couldn't find anything. Quote Link to comment Share on other sites More sharing options...
nightsta1ker Posted May 26, 2012 Report Share Posted May 26, 2012 You're school should have it. Quote Link to comment Share on other sites More sharing options...
apiaguy Posted May 26, 2012 Report Share Posted May 26, 2012 Most schools with 300s wouldnt have it in their service bulletins book as it is an optional modification that mostly police depts used...but it is available on sikorsky360 if your mechanic has an account...I'm traveling right now and on the iPad..I can't get the zip file to dl....ill attach it on Monday when I get home if someone else hasn't already. Quote Link to comment Share on other sites More sharing options...
jjsemperfi Posted May 26, 2012 Author Report Share Posted May 26, 2012 Oh it's not a huge deal, just curious, thanks. Quote Link to comment Share on other sites More sharing options...
apiaguy Posted May 29, 2012 Report Share Posted May 29, 2012 ok.. it's a pdf file and I'm not the quickest computer tard... don't know how to attach it here... help please. Quote Link to comment Share on other sites More sharing options...
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