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  #41  
Old 04-18-2014, 10:11 AM
rhill rhill is offline
 
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Location: Valley Forge, Pa
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Quote:
Originally Posted by Don View Post
Could you list the four? I'm only aware of 3 - stock, ASA, and Berringer. Thanks.
Grove nose wheel
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  #42  
Old 04-18-2014, 10:12 AM
PaigeHoffart PaigeHoffart is offline
 
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Quote:
Originally Posted by Don View Post
Could you list the four? I'm only aware of 3 - stock, ASA, and Berringer. Thanks.
Add the Matco axle...

http://www.matcomfg.com/AXLEASSEMBLY...dv-3657-1.html
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  #43  
Old 04-18-2014, 10:14 AM
rhill rhill is offline
 
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Originally Posted by PaigeHoffart View Post
I stand corrected 5, Matco axel
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  #44  
Old 04-18-2014, 10:19 AM
drakerv drakerv is offline
 
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matco wheel axle.
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  #45  
Old 04-18-2014, 01:23 PM
AV8AZ AV8AZ is offline
 
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Location: Phoenix, Arizona
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Quote:
Originally Posted by Pmerems View Post
5. Many GA airplanes (Cessna, Beech, Piper etc) have nose gear collapses all to often.
I read the same reports for the same reasons. I don't mean to argue, but the statement above deserves qualification. We aren't talking about Mooney pilots porpoising into the deck, retractable gear folding, or fixed-gear aircraft flying nose first into the ground for want of flare. We are talking about fixed nose gears folding during slow taxi. I'm sure that such events have happened but you'd be hard pressed to find one.
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  #46  
Old 04-18-2014, 01:58 PM
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rvbuilder2002 rvbuilder2002 is offline
 
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Location: Hubbard Oregon
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Quote:
Originally Posted by AV8AZ View Post
We aren't talking about Mooney pilots porpoising into the deck, retractable gear folding, or fixed-gear aircraft flying nose first into the ground for want of flare. We are talking about fixed nose gears folding during slow taxi. I'm sure that such events have happened but you'd be hard pressed to find one.
But if we are to keep things fully in perspective...
Only a very small # of the folded up nose gear legs on trigear RV's have happened the like the one described in this thread. And of those, not a lot of detailed data is available (how deep of a hole the wheel rolled attempted to roll through, etc.)
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  #47  
Old 04-18-2014, 02:52 PM
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AlexPeterson AlexPeterson is offline
 
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Quote:
Originally Posted by Don View Post
Could you list the four? I'm only aware of 3 - stock, ASA, and Berringer. Thanks.
There are two stock bearing designs. The original, supplied until somewhere in the late 90's, had a solid aluminum axle, which spanned from fork to fork. Newer ones had the no axle, "mushroom" design, with only the bolt spanning the whole distance. As far as I know, that is still what is supplied.
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  #48  
Old 04-18-2014, 03:25 PM
rockwoodrv9 rockwoodrv9 is offline
 
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If you look on the forums of the 152, Grumman, 172, Piper, any of the LSA planes, are their discussions of nose gear problems? If we want to keep things in perspective, it goes both ways.

I chose to the 9A after researching what to build for several years. I talked with two 9A pilots that had nose gear problems. One went over, one just needed a new engine and repairs. Neither had the anti splat device. After discussions and research, I am building the 9A and not sorry for my choice. I spoke with Alan and have every modification to the nose gear he makes. When I am landing, I will do my best to keep the nose wheel off the ground until I am in the hangar. If I go over, I will have a canopy cracking tool in the cockpit. I will also keep my 5 point harness tightened all the time.

If we are waiting for Vans to design a "fix", that won't happen. I am not an engineer, but I understand business. Vans designed a bunch of great planes for many specific missions. Their goal has always been to put kits out that are fun to fly, cheap to fly, and fast. They hit it out of the park reaching their goals.

That doesn't mean that there is no room for improvement. I have no doubt a better nose gear could be built at a reasonable cost and minimal increase in weight. Would you give up your CS prop for a stronger engine mount and nose wheel? I would. And before people start saying that would just transfer the stresses in a different place, I say I sure hope so! It sure needed to be transferred in this case and in both of the guys I talked to.

When somebody comes up with another modification or Allen gets really creative, I am still in the market for a move "forgiving" nose wheel. That in no way means I am not happy with Vans, Scott, or anybody. It is an experimental airplane. I just wish I had the engineering background to experiment a way around this.

Maybe it is as simple as a bigger nose wheel. I guess I could try that! Best of luck to all of us building or flying the A models.



Quote:
Originally Posted by rvbuilder2002 View Post
But if we are to keep things fully in perspective...
Only a very small # of the folded up nose gear legs on trigear RV's have happened the like the one described in this thread. And of those, not a lot of detailed data is available (how deep of a hole the wheel rolled attempted to roll through, etc.)
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  #49  
Old 04-18-2014, 09:15 PM
Captain Avgas Captain Avgas is offline
 
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Quote:
Originally Posted by L.Adamson View Post
Of course it's addressed. But with heavier planes, more powerful engines, and more wing area to support it. As one, who's been through the nose gear collapse (RV6A), I don't see this heavier and beefed up gear setup........being applied to these light weight and responsive airplanes.
Larry, I wouldn't jump to any conclusions without data about the RV14A nose gear system being substantially heavier than the RV7A system. The difference in weight, if any, may in fact be quite marginal. Consider that the RV7A nose gear strut is a solid rod whereas the RV14A nose gear strut is a hollow tube.

My best guess is that the RV14A nose gear system is just a more sophisticated design providing greater structural redundancy for little or no increase in weight or drag. I certainly don't regard it as a "beefed up" version of the RV7A system because it works on an entirely different engineering principle. The RV7A gear strut is designed to flex, the RV14 gear strut is designed to resist flex.

The RV14A nose gear system undoubtedly costs more to manufacture but it would probably cost no more than an RV7A system with all of the ASA mods (and might cost less).
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  #50  
Old 04-18-2014, 09:55 PM
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rvbuilder2002 rvbuilder2002 is offline
 
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The RV-14A nose gear / engine mount design has a high level of engineering integration with the design of the fwd fuselage (as is the RV-10 for that matter).
There is not likely to be a bolt on option of a nose gear / mount of this style for an RV-6,7, or 9 any time soon.
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Opinions, information and comments are my own unless stated otherwise. They do not necessarily represent the direction/opinions of my employer.

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Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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