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Elevator pushrod

Terry Burch All Messages By This Member #89546 Help! I don’t understand how to pushrod has any room to operate as it passes thru all the tubes . There seems to be little room between the horizontal spar and the tube angling across the bay forward . My drawing show a 3.875 demension on the elevator bell crank. What am I missing? Thanks for any insight.
Matt W Member Profile All Messages By This Member #89548 Hi Terry,? I’ve attached a few pictures to help visualize. ? Just went thru this a year ago. ?I mocked up a temporary elevator horn first to figure out the geometry. ?I had three interference points.? ?First interference point was the lower fuse diagonal behind the aft end of the control push-rod. ?Had to remake the elevator swivel to provide clearance (raised up fwd end of elevator pushrod). ?Second was the upper fuse diagonal between station 144 and 163. ?The diagonal had to be angled such that the aft end terminated approximately 1/2 inch forward of station 163. ?Third interference point was the h-stab spar. ?If your elevator horn is 90 deg to pushrod when the elevator is neutral, this should help eliminate that interference. ?Everything changes when you change the incidence angle of the h-stab. ?Have to play with it. ? Another thing I did to help provide clearance was to reduce the end of the elevator pushrod from 3/4 to 5/8. ?Pushrod is spliced a few inches forward of h-stab. ? Also, for the length of the elevator horn, I used 3.75 instead of 3.875 to give more angular throw of the elevator. ? I have more pictures on the EAA builders log site if you want to check those out. ? Hope that helps a little. ? ?Matt Wise On Friday, December 13, 2024 at 08:24:37 PM EST, Terry Burch via groups.io <terry.burch2@...> wrote: Help! I don’t understand how to pushrod has any room to operate as it passes thru all the tubes . There seems to be little room between the horizontal spar and the tube angling across the bay forward .? My drawing show a 3.875 demension on the elevator bell crank. What am I missing? Thanks for any insight. IMG_7975.jpeg IMG_7973.jpeg IMG_7974.jpeg IMG_7972.jpeg
Terry Burch All Messages By This Member #89550 开云体育 That is incredibly helpful. Thanks. I am puzzled as to why wouldn’t it make sense to install a bellcrank with the elevator arm pointing down? toggle quoted message Show quoted text On Dec 13, 2024, at 7:07?PM, Matt W via groups.io <flyer_86f@...> wrote: ? Hi Terry,? I’ve attached a few pictures to help visualize. ? Just went thru this a year ago. ?I mocked up a temporary elevator horn first to figure out the geometry. ?I had three interference points.? ?First interference point was the lower fuse diagonal behind the aft end of the control push-rod. ?Had to remake the elevator swivel to provide clearance (raised up fwd end of elevator pushrod). ?Second was the upper fuse diagonal between station 144 and 163. ?The diagonal had to be angled such that the aft end terminated approximately 1/2 inch forward of station 163. ?Third interference point was the h-stab spar. ?If your elevator horn is 90 deg to pushrod when the elevator is neutral, this should help eliminate that interference. ?Everything changes when you change the incidence angle of the h-stab. ?Have to play with it. ? Another thing I did to help provide clearance was to reduce the end of the elevator pushrod from 3/4 to 5/8. ?Pushrod is spliced a few inches forward of h-stab. ? Also, for the length of the elevator horn, I used 3.75 instead of 3.875 to give more angular throw of the elevator. ? I have more pictures on the EAA builders log site if you want to check those out. ? Hope that helps a little. ? ?Matt Wise On Friday, December 13, 2024 at 08:24:37 PM EST, Terry Burch via groups.io <terry.burch2@...> wrote: Help! I don’t understand how to pushrod has any room to operate as it passes thru all the tubes . There seems to be little room between the horizontal spar and the tube angling across the bay forward .? My drawing show a 3.875 demension on the elevator bell crank. What am I missing? Thanks for any insight. <IMG_7975.jpeg> <IMG_7973.jpeg> <IMG_7974.jpeg> <IMG_7972.jpeg>
Don Norris All Messages By This Member #89551 More parts, more complexity, more weight. The W8 had a walking beam (?) that did that. Simplify and add lightness, On Friday, December 13th, 2024 at 11:18 PM, Terry Burch via groups.io <terry.burch2@...> wrote: toggle quoted message Show quoted text That is incredibly helpful. Thanks. I am puzzled as to why wouldn’t it make sense to install a bellcrank with the elevator arm pointing down? On Dec 13, 2024, at 7:07?PM, Matt W via groups.io <flyer_86f@...> wrote: ? Hi Terry,? I’ve attached a few pictures to help visualize. ? Just went thru this a year ago. ?I mocked up a temporary elevator horn first to figure out the geometry. ?I had three interference points.? ?First interference point was the lower fuse diagonal behind the aft end of the control push-rod. ?Had to remake the elevator swivel to provide clearance (raised up fwd end of elevator pushrod). ?Second was the upper fuse diagonal between station 144 and 163. ?The diagonal had to be angled such that the aft end terminated approximately 1/2 inch forward of station 163. ?Third interference point was the h-stab spar. ?If your elevator horn is 90 deg to pushrod when the elevator is neutral, this should help eliminate that interference. ?Everything changes when you change the incidence angle of the h-stab. ?Have to play with it. ? Another thing I did to help provide clearance was to reduce the end of the elevator pushrod from 3/4 to 5/8. ?Pushrod is spliced a few inches forward of h-stab. ? Also, for the length of the elevator horn, I used 3.75 instead of 3.875 to give more angular throw of the elevator. ? I have more pictures on the EAA builders log site if you want to check those out. ? Hope that helps a little. ? ?Matt Wise On Friday, December 13, 2024 at 08:24:37 PM EST, Terry Burch via groups.io <terry.burch2@...> wrote: Help! I don’t understand how to pushrod has any room to operate as it passes thru all the tubes . There seems to be little room between the horizontal spar and the tube angling across the bay forward .? My drawing show a 3.875 demension on the elevator bell crank. What am I missing? Thanks for any insight. <IMG_7975.jpeg> <IMG_7973.jpeg> <IMG_7974.jpeg> <IMG_7972.jpeg>
Terry Burch All Messages By This Member #89552 开云体育 Thanks Matt for the steer to your builders log. Great help! Question, is your fuselage from VR3? It looks exactly like mine. toggle quoted message Show quoted text On Dec 13, 2024, at 7:07?PM, Matt W via groups.io <flyer_86f@...> wrote: ? Hi Terry,? I’ve attached a few pictures to help visualize. ? Just went thru this a year ago. ?I mocked up a temporary elevator horn first to figure out the geometry. ?I had three interference points.? ?First interference point was the lower fuse diagonal behind the aft end of the control push-rod. ?Had to remake the elevator swivel to provide clearance (raised up fwd end of elevator pushrod). ?Second was the upper fuse diagonal between station 144 and 163. ?The diagonal had to be angled such that the aft end terminated approximately 1/2 inch forward of station 163. ?Third interference point was the h-stab spar. ?If your elevator horn is 90 deg to pushrod when the elevator is neutral, this should help eliminate that interference. ?Everything changes when you change the incidence angle of the h-stab. ?Have to play with it. ? Another thing I did to help provide clearance was to reduce the end of the elevator pushrod from 3/4 to 5/8. ?Pushrod is spliced a few inches forward of h-stab. ? Also, for the length of the elevator horn, I used 3.75 instead of 3.875 to give more angular throw of the elevator. ? I have more pictures on the EAA builders log site if you want to check those out. ? Hope that helps a little. ? ?Matt Wise On Friday, December 13, 2024 at 08:24:37 PM EST, Terry Burch via groups.io <terry.burch2@...> wrote: Help! I don’t understand how to pushrod has any room to operate as it passes thru all the tubes . There seems to be little room between the horizontal spar and the tube angling across the bay forward .? My drawing show a 3.875 demension on the elevator bell crank. What am I missing? Thanks for any insight. <IMG_7975.jpeg> <IMG_7973.jpeg> <IMG_7974.jpeg> <IMG_7972.jpeg>
Matt W Member Profile All Messages By This Member #89554 Terry,? No, not a VR3 fuselage. ? Picked up tubing wherever I could find it during the pandemic. ? Matt On Saturday, December 14, 2024 at 12:48:08 AM EST, Terry Burch via groups.io <terry.burch2@...> wrote: Thanks Matt for the steer to your builders log. Great help! Question, is your fuselage from VR3? It looks exactly like mine. toggle quoted message Show quoted text On Dec 13, 2024, at 7:07?PM, Matt W via groups.io <flyer_86f@...> wrote: ? Hi Terry,? I’ve attached a few pictures to help visualize. ? Just went thru this a year ago. ?I mocked up a temporary elevator horn first to figure out the geometry. ?I had three interference points.? ?First interference point was the lower fuse diagonal behind the aft end of the control push-rod. ?Had to remake the elevator swivel to provide clearance (raised up fwd end of elevator pushrod). ?Second was the upper fuse diagonal between station 144 and 163. ?The diagonal had to be angled such that the aft end terminated approximately 1/2 inch forward of station 163. ?Third interference point was the h-stab spar. ?If your elevator horn is 90 deg to pushrod when the elevator is neutral, this should help eliminate that interference. ?Everything changes when you change the incidence angle of the h-stab. ?Have to play with it. ? Another thing I did to help provide clearance was to reduce the end of the elevator pushrod from 3/4 to 5/8. ?Pushrod is spliced a few inches forward of h-stab. ? Also, for the length of the elevator horn, I used 3.75 instead of 3.875 to give more angular throw of the elevator. ? I have more pictures on the EAA builders log site if you want to check those out. ? Hope that helps a little. ? ?Matt Wise On Friday, December 13, 2024 at 08:24:37 PM EST, Terry Burch via groups.io <terry.burch2@...> wrote: Help! I don’t understand how to pushrod has any room to operate as it passes thru all the tubes . There seems to be little room between the horizontal spar and the tube angling across the bay forward .? My drawing show a 3.875 demension on the elevator bell crank. What am I missing? Thanks for any insight. <IMG_7975.jpeg> <IMG_7973.jpeg> <IMG_7974.jpeg> <IMG_7972.jpeg>
Tailwind14855 All Messages By This Member #89557 I made a lot of small changes in the elevator controls. One major one was to use an idler which allows two separate tubes. The idler requires a larger fuselage cross tube to mount the idler fittings on. I'm pretty sure I? increased the horn dimension by 1/8". I may have offset the idler a bit to one side to increase clearance on push tubes.? For those still building the basic fuselage the upper diagonal aft of station 111 can be offset slightly to the left at both ends.? For the VR3 builders did they ever revise the tubes to conform to the changes made to correct dimensional errors. The major one is that cabin width dimensions should be tube centerline, NOT outside dimensions.? I tried to discuss this with the VR people probably 20 years ago. They would not talk to me. I consider VR a total fraud.?
Tailwind14855 All Messages By This Member #89558 Idler with rod end bearings eliminated the need for rotating fitting on the aft end of forward pushrod.
Terry Burch All Messages By This Member #89560 开云体育 I am building a VR3 Fuselage. I have found it to be fantastic. Right or wrong, it matches the Aircraft Spruce plans. I have found only one obvious mistake on the horizontal inboard rib, but was easily rectrified. toggle quoted message Show quoted text On Dec 14, 2024, at 9:29?AM, Tailwind14855 via groups.io <Tailwind14855@...> wrote: ? Idler with rod end bearings eliminated the need for rotating fitting on the aft end of forward pushrod.
Tailwind14855 All Messages By This Member #89561 The W8 fuselage drawing shows tube centerlines. The W10 drawings show outside tube dimensions. The Baraboo? W10's were built from W8 drawings with penciled in changes. I measured the cabin dimensions on at least two Clement airplanes and confirmed cabin dimensions are same as W8.? On Saturday, December 14, 2024 at 12:38:23 PM MST, Terry Burch via groups.io <terry.burch2@...> wrote: I am building a VR3 Fuselage. I have found it to be fantastic. Right or wrong, it matches the Aircraft Spruce plans. I have found only one obvious mistake on the horizontal inboard rib, but was easily rectrified. toggle quoted message Show quoted text On Dec 14, 2024, at 9:29?AM, Tailwind14855 via groups.io <Tailwind14855@...> wrote: ? Idler with rod end bearings eliminated the need for rotating fitting on the aft end of forward pushrod.

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