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ron.mcgann(at)baesystems.
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 Posted: Thu May 17, 2007 3:53 am Post subject: Gear leg geometry |
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G'day all,
I was working the wheel pants this evening. Gear is on, but the fuse is still resting on the workbench. I leveled at the mid cabin deck in pitch and roll. When I measured the distance between the floor and bottom of the wheel I found a 3/8" difference. The shed floor is flat. The distance between the floor and spar corners is within 1/8", suggesting a difference in gear leg angles of 1/4-3/8".
Best I can tell is that there must be a slight difference in the gear leg weldments to result in the offset. Has anyone else noticed this? Is the 3/8" difference a problem? Will this cause a problem in properly aligning the wheel pants?
Given the accuracy of the kit up to this point, I am a little surprised with this. Maybe I'm just getting too anal.
thanks in advance
Ron
187 finishing
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jesse(at)saintaviation.co
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| Posted: Thu May 17, 2007 5:15 am Post subject: Gear leg geometry |
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Although I have not seen this difference before personally, it does not completely surprise me. In fact, I think I remember somebody else mentioning it on the list in the past, although I am not sure. It may be worth taking it off the bench and then measuring, leveling, checking to see if it is even then. If not, then it may be an issue because the plane may not sit level. On the other hand, with that long arm, ¼” with no weight could be just about anything, however minor. If the plane sits level when parked, then I wouldn’t worry about it and just rig the pants for the least drag when flying (at 200mph nobody will be looking up and saying, “hey, one of his gear legs is lower than the other). Again, the biggest issue, IMHO, would be whether or not the fuse will sit flat once you get the engine, wings, pilot, passengers, etc loaded up. Even ¼” there probably would be hard to notice over 8’, because that would be about ¼ degree off level if my math is correct.
Is it possible that something is “preloading” one of the gear legs either on your table or inside? Are your weldments completely secured and torqued (with no unwanted burs/shims anywhere)?
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
www.saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of McGANN, Ron
Sent: Thursday, May 17, 2007 7:49 AM
To: rv10-list(at)matronics.com
Subject: Gear leg geometry
G'day all,
I was working the wheel pants this evening. Gear is on, but the fuse is still resting on the workbench. I leveled at the mid cabin deck in pitch and roll. When I measured the distance between the floor and bottom of the wheel I found a 3/8" difference. The shed floor is flat. The distance between the floor and spar corners is within 1/8", suggesting a difference in gear leg angles of 1/4-3/8".
Best I can tell is that there must be a slight difference in the gear leg weldments to result in the offset. Has anyone else noticed this? Is the 3/8" difference a problem? Will this cause a problem in properly aligning the wheel pants?
Given the accuracy of the kit up to this point, I am a little surprised with this. Maybe I'm just getting too anal.
thanks in advance
Ron
187 finishing [quote] [b]
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LloydDR(at)wernerco.com
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| Posted: Thu May 17, 2007 5:35 am Post subject: Gear leg geometry |
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Each wheel pant is done independently of the other, IE it does not matter where the other gear leg is. What matters is that the fuse is level, and that you establish a flat plan of reference to measure front and rear of the wheel pant to. Then aligning it to the centerline of the fuse. do this on both side and it will not effect anything.
Dan
N289DT RV10E
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of McGANN, Ron
Sent: Thursday, May 17, 2007 7:49 AM
To: rv10-list(at)matronics.com
Subject: Gear leg geometry
G'day all,
I was working the wheel pants this evening. Gear is on, but the fuse is still resting on the workbench. I leveled at the mid cabin deck in pitch and roll. When I measured the distance between the floor and bottom of the wheel I found a 3/8" difference. The shed floor is flat. The distance between the floor and spar corners is within 1/8", suggesting a difference in gear leg angles of 1/4-3/8".
Best I can tell is that there must be a slight difference in the gear leg weldments to result in the offset. Has anyone else noticed this? Is the 3/8" difference a problem? Will this cause a problem in properly aligning the wheel pants?
Given the accuracy of the kit up to this point, I am a little surprised with this. Maybe I'm just getting too anal.
thanks in advance
Ron
187 finishing
[quote]
href="http://www.matronics.com/Navigator?RV10-List">http://www.matronics.com/Navigator?RV10-List
href="http://forums.matronics.com">http://forums.matronics.com
[b]
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LloydDR(at)wernerco.com
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| Posted: Thu May 17, 2007 6:12 am Post subject: Gear leg geometry |
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Your airplane will likely never sit level anywhere. The loading of each side of the airplane is rarely equally distributed, think single pilot operation, and this could easily make one side of the plane sit lower than the other, uneven taxi etc. This small of a difference should not amount to anything, as long as each wheel pant is done correctly.
Dan
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jesse Saint
Sent: Thursday, May 17, 2007 9:15 AM
To: rv10-list(at)matronics.com
Subject: RE: Gear leg geometry
Although I have not seen this difference before personally, it does not completely surprise me. In fact, I think I remember somebody else mentioning it on the list in the past, although I am not sure. It may be worth taking it off the bench and then measuring, leveling, checking to see if it is even then. If not, then it may be an issue because the plane may not sit level. On the other hand, with that long arm, ¼” with no weight could be just about anything, however minor. If the plane sits level when parked, then I wouldn’t worry about it and just rig the pants for the least drag when flying (at 200mph nobody will be looking up and saying, “hey, one of his gear legs is lower than the other). Again, the biggest issue, IMHO, would be whether or not the fuse will sit flat once you get the engine, wings, pilot, passengers, etc loaded up. Even ¼” there probably would be hard to notice over 8’, because that would be about ¼ degree off level if my math is correct.
Is it possible that something is “preloading” one of the gear legs either on your table or inside? Are your weldments completely secured and torqued (with no unwanted burs/shims anywhere)?
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
www.saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of McGANN, Ron
Sent: Thursday, May 17, 2007 7:49 AM
To: rv10-list(at)matronics.com
Subject: Gear leg geometry
G'day all,
I was working the wheel pants this evening. Gear is on, but the fuse is still resting on the workbench. I leveled at the mid cabin deck in pitch and roll. When I measured the distance between the floor and bottom of the wheel I found a 3/8" difference. The shed floor is flat. The distance between the floor and spar corners is within 1/8", suggesting a difference in gear leg angles of 1/4-3/8".
Best I can tell is that there must be a slight difference in the gear leg weldments to result in the offset. Has anyone else noticed this? Is the 3/8" difference a problem? Will this cause a problem in properly aligning the wheel pants?
Given the accuracy of the kit up to this point, I am a little surprised with this. Maybe I'm just getting too anal.
thanks in advance
Ron
187 finishing | Quote: | | http://www.matronics.com/Navigator?RV10-List |
01234
5 [quote][b]
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VHMUM(at)bigpond.com
Guest
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| Posted: Thu May 17, 2007 12:42 pm Post subject: Gear leg geometry |
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Yes mine was the same. Also the gear leg supports on the right side had to be redrilled as all the bolts were on a angle. Very very poor workmanship from the Philiphines.
Chris
[quote] ---
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ron.mcgann(at)baesystems.
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| Posted: Thu May 17, 2007 3:17 pm Post subject: Gear leg geometry |
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Guys,
Thanks for the replies both on and off list. Jesse - no preloading, weldments were a bitch to install, but fit fine with no shims or hole misalignment. Vans suggest I am indeed being a bit too anal and that I am '. . . a victim of manufacturing tolerance stackup.' They commend the idea of installing the pants while the fuse is on the bench (as previously endorsed by the list).
After sleeping on it and doing the math, best I can calculate is that if there is a 3/8" height difference between the gear legs, there will be about 1.5" difference in height between the wingtips. As Dan points out, indiscernable after the acft is loaded.
The key factor is to ensure that the fairings are properly aligned during flight, so the strategy appears to be to press on, make sure the acft is absolutely level and treat each pant separately. Pity she will have a bit of a lean (if you look reeeeal closely) when parked.
cheers,
Ron
[quote] From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Lloyd, Daniel R.
Sent: Thursday, 17 May 2007 11:42 PM
To: rv10-list(at)matronics.com
Subject: RE: Gear leg geometry
Your airplane will likely never sit level anywhere. The loading of each side of the airplane is rarely equally distributed, think single pilot operation, and this could easily make one side of the plane sit lower than the other, uneven taxi etc. This small of a difference should not amount to anything, as long as each wheel pant is done correctly.
Dan
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jesse Saint
Sent: Thursday, May 17, 2007 9:15 AM
To: rv10-list(at)matronics.com
Subject: RE: Gear leg geometry
Although I have not seen this difference before personally, it does not completely surprise me. In fact, I think I remember somebody else mentioning it on the list in the past, although I am not sure. It may be worth taking it off the bench and then measuring, leveling, checking to see if it is even then. If not, then it may be an issue because the plane may not sit level. On the other hand, with that long arm, ¼” with no weight could be just about anything, however minor. If the plane sits level when parked, then I wouldn’t worry about it and just rig the pants for the least drag when flying (at 200mph nobody will be looking up and saying, “hey, one of his gear legs is lower than the other). Again, the biggest issue, IMHO, would be whether or not the fuse will sit flat once you get the engine, wings, pilot, passengers, etc loaded up. Even ¼” there probably would be hard to notice over 8’, because that would be about ¼ degree off level if my math is correct.
Is it possible that something is “preloading” one of the gear legs either on your table or inside? Are your weldments completely secured and torqued (with no unwanted burs/shims anywhere)?
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
www.saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of McGANN, Ron
Sent: Thursday, May 17, 2007 7:49 AM
To: rv10-list(at)matronics.com
Subject: Gear leg geometry
G'day all,
I was working the wheel pants this evening. Gear is on, but the fuse is still resting on the workbench. I leveled at the mid cabin deck in pitch and roll. When I measured the distance between the floor and bottom of the wheel I found a 3/8" difference. The shed floor is flat. The distance between the floor and spar corners is within 1/8", suggesting a difference in gear leg angles of 1/4-3/8".
Best I can tell is that there must be a slight difference in the gear leg weldments to result in the offset. Has anyone else noticed this? Is the 3/8" difference a problem? Will this cause a problem in properly aligning the wheel pants?
Given the accuracy of the kit up to this point, I am a little surprised with this. Maybe I'm just getting too anal.
thanks in advance
Ron
187 finishing01234
56[b]
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VHMUM(at)bigpond.com
Guest
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| Posted: Thu May 17, 2007 3:44 pm Post subject: Gear leg geometry |
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Well Ron park next to mine and no one will know!
Chris
[quote] ---
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dogsbark(at)comcast.net
Guest
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| Posted: Thu May 17, 2007 5:15 pm Post subject: Gear leg geometry |
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Just come to Colorado Springs around August and fly around 4:00pm. We will surely have a nice crosswind and high density altitude for you to help clunk it down just enough to adjust one side.
Sean Blair
#40225
[quote]-------------- Original message --------------
From: "The McGough Family" <VHMUM(at)bigpond.com>
v\:* { BEHAVIOR: url(#default#VML) } o\:* { BEHAVIOR: url(#default#VML) } w\:* { BEHAVIOR: url(#default#VML) } .shape { BEHAVIOR: url(#default#VML) } (at)font-face { font-family: Tahoma; } (at)page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.25in 1.0in 1.25in; } P.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman" } LI.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman" } DIV.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman" } A:link { COLOR: blue; TEXT-DECORATION: underline } SPAN.MsoHyperlink { COLOR: blue; TEXT-DECORATION: underline } A:visited { COLOR: blue; TEXT-DECORATION: underline } SPAN.MsoHyperlinkFollowed { COLOR: blue; TEXT-DECORATION: underline } P { FONT-SIZE: 12pt; MARGIN-LEFT: 0in; MARGIN-RIGHT: 0in; FONT-FAMILY: "Times New Roman"; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto } PRE { FONT-SIZE: 10pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Courier New" } SPAN.EmailStyle19 { COLOR: navy; FONT-FAMILY: Arial; mso-style-type: personal-reply } DIV.Section1 { page: Section1 } Well Ron park next to mine and no one will know!
Chris
[quote] ---
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acs(at)acspropeller.com.a
Guest
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| Posted: Thu May 17, 2007 9:10 pm Post subject: Gear leg geometry |
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You need the gear leg that is counter to the engine torque direction, to be longer than the other in order to nullify the effect of the torque trying to load down that side. When you apply power…the engine torque will drive that leg lower, the wings will even out and look level to the guy sitting at the end of the runway feeling envious of your perfectly aligned building achievement.
Or try a lift in one shoe.
John 40315
Do not archive (for obvious reasons)
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of The McGough Family
Sent: Friday, 18 May 2007 9:44 AM
To: rv10-list(at)matronics.com
Subject: Re: Gear leg geometry
Well Ron park next to mine and no one will know!
Chris
[quote]
---
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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LloydDR(at)wernerco.com
Guest
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| Posted: Fri May 18, 2007 5:47 am Post subject: Gear leg geometry |
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Just keep more fuel in the high side and she will sit proud!
Dan
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of McGANN, Ron
Sent: Thursday, May 17, 2007 7:16 PM
To: rv10-list(at)matronics.com
Subject: RE: Gear leg geometry
Guys,
Thanks for the replies both on and off list. Jesse - no preloading, weldments were a bitch to install, but fit fine with no shims or hole misalignment. Vans suggest I am indeed being a bit too anal and that I am '. . . a victim of manufacturing tolerance stackup.' They commend the idea of installing the pants while the fuse is on the bench (as previously endorsed by the list).
After sleeping on it and doing the math, best I can calculate is that if there is a 3/8" height difference between the gear legs, there will be about 1.5" difference in height between the wingtips. As Dan points out, indiscernable after the acft is loaded.
The key factor is to ensure that the fairings are properly aligned during flight, so the strategy appears to be to press on, make sure the acft is absolutely level and treat each pant separately. Pity she will have a bit of a lean (if you look reeeeal closely) when parked.
cheers,
Ron
| Quote: | From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Lloyd, Daniel R.
Sent: Thursday, 17 May 2007 11:42 PM
To: rv10-list(at)matronics.com
Subject: RE: Gear leg geometry
Your airplane will likely never sit level anywhere. The loading of each side of the airplane is rarely equally distributed, think single pilot operation, and this could easily make one side of the plane sit lower than the other, uneven taxi etc. This small of a difference should not amount to anything, as long as each wheel pant is done correctly.
Dan
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jesse Saint
Sent: Thursday, May 17, 2007 9:15 AM
To: rv10-list(at)matronics.com
Subject: RE: Gear leg geometry
Although I have not seen this difference before personally, it does not completely surprise me. In fact, I think I remember somebody else mentioning it on the list in the past, although I am not sure. It may be worth taking it off the bench and then measuring, leveling, checking to see if it is even then. If not, then it may be an issue because the plane may not sit level. On the other hand, with that long arm, ¼” with no weight could be just about anything, however minor. If the plane sits level when parked, then I wouldn’t worry about it and just rig the pants for the least drag when flying (at 200mph nobody will be looking up and saying, “hey, one of his gear legs is lower than the other). Again, the biggest issue, IMHO, would be whether or not the fuse will sit flat once you get the engine, wings, pilot, passengers, etc loaded up. Even ¼” there probably would be hard to notice over 8’, because that would be about ¼ degree off level if my math is correct.
Is it possible that something is “preloading” one of the gear legs either on your table or inside? Are your weldments completely secured and torqued (with no unwanted burs/shims anywhere)?
Jesse Saint
Saint Aviation, Inc.
jesse(at)saintaviation.com (jesse(at)saintaviation.com)
www.saintaviation.com
Cell: 352-427-0285
Fax: 815-377-3694
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of McGANN, Ron
Sent: Thursday, May 17, 2007 7:49 AM
To: rv10-list(at)matronics.com
Subject: Gear leg geometry
G'day all,
I was working the wheel pants this evening. Gear is on, but the fuse is still resting on the workbench. I leveled at the mid cabin deck in pitch and roll. When I measured the distance between the floor and bottom of the wheel I found a 3/8" difference. The shed floor is flat. The distance between the floor and spar corners is within 1/8", suggesting a difference in gear leg angles of 1/4-3/8".
Best I can tell is that there must be a slight difference in the gear leg weldments to result in the offset. Has anyone else noticed this? Is the 3/8" difference a problem? Will this cause a problem in properly aligning the wheel pants?
Given the accuracy of the kit up to this point, I am a little surprised with this. Maybe I'm just getting too anal.
thanks in advance
Ron
187 finishing | Quote: | | http://www.matronics.com/Navigator?RV10-List |
01234
56 |
7 [quote][b]
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