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Post by thayghetucsb on Feb 13, 2009 15:03:35 GMT -6
guys, i was watching Finless Bob video on blade tracking. He was using trex 450 as an example. To correct the traking, he said to lower the pith of the higher blade. Wouldn't that mean the blade on each side has different pitch? So when establishing the pitch curve using the pitch gauge which blade do i base this on. I'm building the Trex 450 and this confused the heck outta me.  |
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19000rpm
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Post by 19000rpm on Feb 13, 2009 17:20:58 GMT -6
What you are doing is lowering the pitch for that particular blade by adjusting the connecting rod from the bell crank to the blade grip. Do this by screwing the connecting link in on the blade you want to lower. That brings the blade down and the pitch of each blade equal when tracked.
Happy landings
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akent
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Post by akent on Feb 13, 2009 20:38:02 GMT -6
This bit me a while back, as I did exactly all of that, then trashed my blades. After installing new ones, the tracking was all hosed up.
I found out that you have to go back and reset all of the linkages that you had set before to zero, before setting tracking for the new blades.
So, always start with a level everything at 0 pitch. Then fire it up and set tracking.
So, yes, it's a relative PITA!
Kent
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akent
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Post by akent on Feb 13, 2009 20:52:30 GMT -6
Oh, I misread the original post.
You need everything set to zero at mid stick, before you set tracking. After setting tracking, each blade can be off by varying amounts, depending on the blade set.
So, after setting tracking, you must ignore the 'bad side' that you had to adjust, if you need to adjust anything else.
I have found the Align blades to track amazingly well. The el-cheapo woodies are not so good. These can be more than a degree out.
Kent
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