Edge elevator location (revisited)
04-22-2005 | 01:21 AM
#1
Edge elevator location (revisited)
O.K. guys, I've searched and read all the old posts on this topic, but I never did hear from anybody that actually mounted the elevator servos in the lower location (old Edge kit) and turned the servo arms up. I am just starting on my second Edge (yes, it is the old style with two sets of cutouts above/below each other) and I remembered on my first kit, the geometry of the elevator linkage was not ideal. It sure looks like if I mount my servos in the LOWER bays and use a 1 1/4" servo arm pointed UP that I will get near perfect geometry. The only possible issue I can see is interference with the rudder pull/pull cables, but on my original edge (with the servos in the TOP bay and arms pointing DOWN) they crossed over the pull/pull cables anyway without any issues. PLEASE can someone clear this up for me (and any others interested) once and for all? Thanks for any help/experience you may be able to provide!!!!
Regards,
Astrohog
Regards,
Astrohog
04-22-2005 | 02:06 AM
#2
Senior Member
My Feedback: (1)
RE: Edge elevator location (revisited)
It works out quite well, but can cause a need to re-locate the rudder cables a little. Mounting the rudder servo higher in the fuselage will provide most of a cure for that. Of course, it will eliminate any thoughts of mounting a rudder servo in the tail
04-22-2005 | 01:21 PM
#4
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From: Wisconsin Rapids,
WI
RE: Edge elevator location (revisited)
A friend of mine cut out the bottom of the top servo whole and put a patch in the existing whole. Im not sure what he did with the rudder cables. I wanted to ask people what they did with the cables as far as having them straight or crossed? I crossed mine
04-26-2005 | 08:04 PM
#5
RE: Edge elevator location (revisited)
Anybody out there that has actually done this or actually seen it done? I ran it by a few fellow flyers and they all thought it was a no-brainer, but would feel much more comfortable if someone could verify it has actually been done. Thanks again!!
Regards,
Astrohog
Regards,
Astrohog
04-26-2005 | 09:05 PM
#6
Senior Member
My Feedback: (1)
RE: Edge elevator location (revisited)
I didn't do it on either my 28% Edge or Extra, but I did do it on the 35% Giles. Worked out perfectly without have to perform any other mods. The principle is the same on the 28% planes, but pay attention as to whether or not you have one of the older ones or the newer ones. I understand that the newer versions have had the servo openings re-located a little to permit better linkage geometry. I know of at least one person that has done this on the 28% planes without issue and likes it that way. Try to run rudder cables in a straight line without crossing them if you can. There should be no need to cross the cables, even if you have to lengthen the cable slots a little.
Pat
Pat
04-26-2005 | 09:46 PM
#7
RE: Edge elevator location (revisited)
Thanks, Pat. The rudder cables were the main issue I was worried about as the exit openings look like they are a little closer to the bottom cutouts as they are to the top ones. Mine IS and OLDER version with the two sets of cutouts UNDERNEATH the stab and directly above and below each other. I called Tom and he said that mounting them in the lower location would screw with the geometry more, and that is why I was hesitating to do it, but all the measurements that I made, it looked like the logical (perfect fit) I did not want to waste Tom's time on the phone, hence why I posted here, but I would like to know why he said what he did as he should know this plane as well as anyone!!!!! Thanks again all who responded and if anyone else has additional info, feel free to post away!!!!
Regards,
Astrohog
Regards,
Astrohog
04-26-2005 | 09:52 PM
#8
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From: FORT WORTH,
TX
RE: Edge elevator location (revisited)
ORIGINAL: astrohog
O.K. guys, I've searched and read all the old posts on this topic, but I never did hear from anybody that actually mounted the elevator servos in the lower location (old Edge kit) and turned the servo arms up. I am just starting on my second Edge (yes, it is the old style with two sets of cutouts above/below each other) and I remembered on my first kit, the geometry of the elevator linkage was not ideal. It sure looks like if I mount my servos in the LOWER bays and use a 1 1/4" servo arm pointed UP that I will get near perfect geometry. The only possible issue I can see is interference with the rudder pull/pull cables, but on my original edge (with the servos in the TOP bay and arms pointing DOWN) they crossed over the pull/pull cables anyway without any issues. PLEASE can someone clear this up for me (and any others interested) once and for all? Thanks for any help/experience you may be able to provide!!!!
Regards,
Astrohog
O.K. guys, I've searched and read all the old posts on this topic, but I never did hear from anybody that actually mounted the elevator servos in the lower location (old Edge kit) and turned the servo arms up. I am just starting on my second Edge (yes, it is the old style with two sets of cutouts above/below each other) and I remembered on my first kit, the geometry of the elevator linkage was not ideal. It sure looks like if I mount my servos in the LOWER bays and use a 1 1/4" servo arm pointed UP that I will get near perfect geometry. The only possible issue I can see is interference with the rudder pull/pull cables, but on my original edge (with the servos in the TOP bay and arms pointing DOWN) they crossed over the pull/pull cables anyway without any issues. PLEASE can someone clear this up for me (and any others interested) once and for all? Thanks for any help/experience you may be able to provide!!!!
Regards,
Astrohog
04-26-2005 | 11:58 PM
#9
Senior Member
My Feedback: (1)
RE: Edge elevator location (revisited)
It's not. Ideally, you will want both the arms pointing either up or down, with the position of the arm with the least amount of offset from one end of travel to the other being the best.
Just set the elevator servos in the lower openings and then run the rudder cables through the slots to see where it all comes out to find out if you will have any trouble. The worst you can come out is to need to cut two small pieces of True Red Ultracote to cover up the lower holes.
Another thought is to use servo arms on the elevator that are no more than 1-1/4" long. If I recall correctly, I may have ground off the ends of the arms to 1-1/8" to clear the bottom of the horizontal stabs with both arms pointing up. I'm not home for awhile so I can't go out and check, but I didn't need any more servo arm than that which would easily clear the stab for full deflections using the upper servo holes in the older versions.
Just set the elevator servos in the lower openings and then run the rudder cables through the slots to see where it all comes out to find out if you will have any trouble. The worst you can come out is to need to cut two small pieces of True Red Ultracote to cover up the lower holes.
Another thought is to use servo arms on the elevator that are no more than 1-1/4" long. If I recall correctly, I may have ground off the ends of the arms to 1-1/8" to clear the bottom of the horizontal stabs with both arms pointing up. I'm not home for awhile so I can't go out and check, but I didn't need any more servo arm than that which would easily clear the stab for full deflections using the upper servo holes in the older versions.
