VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #121  
Old 09-23-2010, 10:44 PM
vlittle's Avatar
vlittle vlittle is offline
 
Join Date: Jan 2005
Location: Victoria, Canada
Posts: 2,251
Default

Quote:
Originally Posted by lostpilot28 View Post
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?
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
__________________
===========
V e r n. ====
=======
RV-9A complete
Harmon Rocket complete
S-21 wings complete
Victoria, BC (Summer)
Chandler, Az (Winter)
Reply With Quote
  #122  
Old 09-23-2010, 10:45 PM
LifeofReiley's Avatar
LifeofReiley LifeofReiley is offline
 
Join Date: Jan 2005
Location: Round Rock, TX
Posts: 3,778
Default

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
Reply With Quote
  #123  
Old 09-24-2010, 06:52 AM
N395V's Avatar
N395V N395V is offline
 
Join Date: Aug 2005
Location: Mendon South Carolina
Posts: 1,391
Default

Quote:
Originally Posted by AlexPeterson View Post
Milt - I really, really do not want my name as thread starter on this mess...

fixed............................................. ............................................
__________________



Milt Concannon
Reply With Quote
  #124  
Old 09-24-2010, 07:48 AM
Ron Lee's Avatar
Ron Lee Ron Lee is offline
 
Join Date: Jun 2005
Posts: 3,275
Default

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.
Reply With Quote
  #125  
Old 09-24-2010, 08:03 AM
Walt's Avatar
Walt Walt is offline
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,687
Default

Quote:
Originally Posted by Ron Lee View Post
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).
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
Reply With Quote
  #126  
Old 09-24-2010, 09:02 AM
Sheldon's Avatar
Sheldon Sheldon is offline
 
Join Date: May 2005
Location: Concho, Arizona
Posts: 177
Default

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
__________________
Sheldon Barrett sheldonb@frontiernet.net
RV6A 0-360 FP 750 hrs
Champ RV6 at LOE #3
Reply With Quote
  #127  
Old 09-24-2010, 09:37 AM
az_gila's Avatar
az_gila az_gila is offline
 
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
Exclamation It appears to be...

Quote:
Originally Posted by Sheldon View Post
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
...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
Reply With Quote
  #128  
Old 09-24-2010, 10:09 AM
Sheldon's Avatar
Sheldon Sheldon is offline
 
Join Date: May 2005
Location: Concho, Arizona
Posts: 177
Default

Thanks Gil...missed that for some reason... Just what I was looking for.. Sheldon
__________________
Sheldon Barrett sheldonb@frontiernet.net
RV6A 0-360 FP 750 hrs
Champ RV6 at LOE #3
Reply With Quote
  #129  
Old 09-24-2010, 12:14 PM
Ron Lee's Avatar
Ron Lee Ron Lee is offline
 
Join Date: Jun 2005
Posts: 3,275
Default

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.
Reply With Quote
  #130  
Old 09-24-2010, 03:46 PM
bignose bignose is offline
 
Join Date: Sep 2010
Location: Sao Paulo, Brasil
Posts: 72
Default

Quote:
Originally Posted by allbee View Post
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.
Every RV A Pilot should train this "ad - infinitia", until he is able to land like this with his eyes closed !!!
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:51 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.