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09-23-2010, 10:44 PM
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Join Date: Jan 2005
Location: Victoria, Canada
Posts: 2,251
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Quote:
Originally Posted by lostpilot28
Well, OK...maybe this fits in with the current thread topic. I can't tell. Moderators, feel free to (re)move my post as necessary.
Rather than completely re-design the nosegear leg, what's wrong with the idea of adding a "skid" to cover the nut? I don't think the epoxy ones being discussed would be strong enough (maybe they are), so why not make an aluminum or steel "ramp" that is attached to the nosegear leg between the nut and fork, and that extends forward and ramps upwards to help prevent the nut from digging in? 
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There are at least two designs on this (search the threads): my fiberglass skid plate, and a welded aluminum plate. I think that the new gear leg has minimized the requirement for any form of skid plate.
The issue with the Van's gear leg in my opinion is that it has limited torsional and transversal stability. Put another way, a gear leg that is rectangular or oval in cross section would limit the flex to the fore-aft/up-down dimensions (not side to side or twisting).
I have a friend that crushed two cervical vertebrae when his 7-A pitch-poled due to a hard landing. Yes, the landing was the cause, but the gear leg was a contributor.
This is my last post on this issue because it's been beat to death in other threads. It's a limitation of the design-- we have to get over it and move on. You had to takeoff and land the Spitfire in 3-point attitude or the prop would contact the ground. Pilots learned this and adapted. It became a 'feature' not a 'bug'!
V
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V e r n. ====
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RV-9A complete
Harmon Rocket complete
S-21 wings complete
Victoria, BC (Summer)
Chandler, Az (Winter)
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09-23-2010, 10:45 PM
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Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
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Okay... we can just teach and be proactive(a weekend school)... how to fly an RV-A on/off a grass strip, and include proper landing and approach, and research the landing strips you fly into. 
__________________
Reiley
Retired N622DR - Serial #V7A1467
VAF# 671
Repeat Offender / Race 007
Friend of the RV-1
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09-24-2010, 06:52 AM
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Join Date: Aug 2005
Location: Mendon South Carolina
Posts: 1,391
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Quote:
Originally Posted by AlexPeterson
Milt - I really, really do not want my name as thread starter on this mess...
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fixed............................................. ............................................
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Milt Concannon
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09-24-2010, 07:48 AM
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Join Date: Jun 2005
Posts: 3,275
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I want to know why I developed a nose wheel flat a week ago. Fortunately it happened after I pulled up to my hangar after a puppy flight.
I did find a small hole/leak in the sidewall of the tube (unknown cause at this time).
While repairing that, I took advantage of things read here to open up the wheel pant fairing a bit at the bottom aft section of the opening. Intent is to minimize the chance that the tire will catch the fairing and contribute to a problem.
My carbon fiber skid plate is 0.1 inches thick in the area near the nut. I can't provide an analysis of its ability to protect the nut in a similar case to the one that started this discussion, but it looks OK (TLAR analysis).
I have the shorter gear leg, new fork, I don't fly out of grass strips (except rare occasion like at Mulege Mexico), and I will also be aware to be cautious around asphalt/concrete irregularities.
I am not worried.
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09-24-2010, 08:03 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,687
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Quote:
Originally Posted by Ron Lee
I want to know why I developed a nose wheel flat a week ago. Fortunately it happened after I pulled up to my hangar after a puppy flight.
I did find a small hole/leak in the sidewall of the tube (unknown cause at this time).
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The tubes for the Lamb tire are not that great, best way to prevent flats is to:
1) use plenty of talc when assembling
2) keep the pressure above 40 lbs. this helps prevent the flexing between the tube/tire that causes the wear spots on the tube.
__________________
Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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09-24-2010, 09:02 AM
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Join Date: May 2005
Location: Concho, Arizona
Posts: 177
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I can't seem to find the max weight limit on a 6A nosewheel.. Anyone know where to find it? The orginal manual only has an example.. Van's specs on their website doesn't have it... Thanks Sheldon
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09-24-2010, 09:37 AM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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It appears to be...
Quote:
Originally Posted by Sheldon
I can't seem to find the max weight limit on a 6A nosewheel.. Anyone know where to find it? The orginal manual only has an example.. Van's specs on their website doesn't have it... Thanks Sheldon
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...375 pounds from reading the chart here...
http://www.vansaircraft.com/pdf/Nose...ice_letter.pdf
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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09-24-2010, 10:09 AM
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Join Date: May 2005
Location: Concho, Arizona
Posts: 177
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Thanks Gil...missed that for some reason... Just what I was looking for.. Sheldon
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09-24-2010, 12:14 PM
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Join Date: Jun 2005
Posts: 3,275
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Thanks Walt. I added tire talc to the inside of the tire and outside of the tube. Should have been plenty plus I went to 40 PSI on the pressure.
I looked for a Michelin leak stop type tube but have not found it in the right size.
I also noted after putting the aft fairing on that there was less than desired clearance with the tire so I took it off and removed about 1/4" more. I read and take advice here and put it to use.
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09-24-2010, 03:46 PM
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Join Date: Sep 2010
Location: Sao Paulo, Brasil
Posts: 72
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Quote:
Originally Posted by allbee
Yup you are so right. I see all the time, RV's landing flat with a nose wheel, that is a definate no no. Heck I remember back when I was learning to fly, I thought I did a good landing, than the instructor said, " that was awful". I said what? he said you landed on the nose wheel. Oh, I said, your not suppose to do that, he said no way, try again. I made him happy by doing touch and goes without touching the nose wheel on the runway. It was actually fun and I felt it was a test of my ability to land correctly.
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Every RV A Pilot should train this "ad - infinitia", until he is able to land like this with his eyes closed !!!
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