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Subject: Microvibe tips needed
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mrfixitUser is Offline
JH Newbie
JH Newbie

05/01/2008 10:09 AM  
I use a microvibe on our EC145's. The tail rotor always gives us fits. Does anyone have the same frustration, and what helps to cut down on the number of runups. I have spoken to DSS several times, I am still not satisfied. Any tips would be greatly appreciated.
DictatorUser is Offline
JH Newbie
JH Newbie

05/01/2008 6:51 PM  
We have been using the Microvibe for 5 or 6 years on our Dauphin fleet. We had very little problems with our 3 different models that had the 11 blade/3 point tail rotor system. When we installed the 10 blade/5 point Quiet fenestron system on some of our models we started to have problems. What helped me was to only add weight to ONE point (the heaviest point) on the first run. After that start adding weight to 2 points. Also what helped me was at the end of your balance procedure(when you have an acceptable ips reading-go back into the history file and hit "view list". On it you will find all of your runs. If you take notice the "sens" and "tach factor" changes each time. The bottom set being the most accurate. I take those numbers and transfer them to the group file and change those numbers to the ones from the last run. This seems to make the machine "smarter" from the start. I dont know about the EC 145, but on the Dauphin quiet fenestron (when looking from the left side of the tail rotor) the balance points (A,B,C,D,E) go CLOCKWISE while the angle positions (in degrees) goes COUNTER-CLOCKWISE. DSS way as oppposed to AEC way respectively. This has confused some of our technicians depending on whether you use the balance points as opposed to clock angles when installing your weights. If any of this info is helpful, and you need better clarification,you can e-mail me directly at DRosenberger@mdsp.org.
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