throws
04-06-2009 | 07:45 AM
#1
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From: lake peekskill,
NY
throws
When measuring throws like the elevator do you measure from the top of the stabilizer to the top or bottom of the elevator? The throws are ¼” and the stabilizer and elevator are ¼” thick.
04-06-2009 | 07:49 AM
#2
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RE: throws
You would measure from the center of the control surface to the workbench
But you can also use the top or bottom of the control surface if that's easier... after all, if the top of the elevator moves 1/2", the bottom is going to move 1/2" also.
But you can also use the top or bottom of the control surface if that's easier... after all, if the top of the elevator moves 1/2", the bottom is going to move 1/2" also.
04-06-2009 | 07:56 AM
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From: Jacksonville, FL
RE: throws
When I set throws....I place a ruler at the back of the control surface....so that one end of the ruler is resting on something on the table, so that I have a good starting point that doesn't move...like I'll put the 5 inch mark centered on the elevator (5 inch mark is just an example). then set throws so that I get a 1/4 up and down.
There are other ways to set throws like a throw meter, but the above method works ok
Good flyin
There are other ways to set throws like a throw meter, but the above method works ok
Good flyin
04-06-2009 | 11:39 AM
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RE: throws
Try this method: Center the control surface. I disconnect the control surface from the servo by removing the servo arm, then center the control surface by sandwiching it between two lengths of 1/8 ply and use a clamp each side (right and left) of the horizontal stab (if doing elevator for instance) I center the TX arms and trims, then center the servo arm so that it's perpendicular to the side of the servo. You may have to rotate the servo arm to select the right one. If it is off from perpendicular, you will introduce some slight amount of differential. Once everything is centered, replace the servo arms then remove the clamps.
Move the servo arm, using the TX, to full deflection and see how much it moves and measure it from the flat surface the plane is resting on. See if it deflects the same amount both up and down (it should) and see if your deflection measures ok. If not, make the appropriate mechanical adjustments. Try not to use the electronic end-points if you can manage to get things right with the mechanical adjustments. Your end points should remain at 100% so as to maintain resolution.
The important part is centering everything then measuring the throw.
Move the servo arm, using the TX, to full deflection and see how much it moves and measure it from the flat surface the plane is resting on. See if it deflects the same amount both up and down (it should) and see if your deflection measures ok. If not, make the appropriate mechanical adjustments. Try not to use the electronic end-points if you can manage to get things right with the mechanical adjustments. Your end points should remain at 100% so as to maintain resolution.
The important part is centering everything then measuring the throw.
