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Date: Wed, 13 Apr 2005 20:50:41 -0500
From: Jim Sower <canarder@frontiernet.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Fw: Gear-UP Landings - problem solved...?
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<... it only has to work once to prevent damage to the airplane ...>
But if it costs 3 times more than the repair, it has to survive at least 
3 gear up landings.
Load one up with 100# of ballast and drag it down the highway at 80 mph 
... Jim S.

Jack Beale wrote:

> K,
>  
>     We don't know what will actually happen to a Nylon or Phenolic 
> ball when it hits the asphalt at 60 mph.  Perhaps it would 
> self-destruct - perhaps it would only roll.
>  
>     Point is, it only has to work once to prevent damage to the 
> airplane.  If it does get damaged, it's simple and cheap to replace 
> the ball...
>  
>     I kinda like the idea of a rollerblade with several rollers 
> contacting the runway at the same time....
>
> Jack Beale
> jack.beale@att.net <mailto:jack.beale@att.net>
>  
>  
> ------------------------------------------------------------------------
>
>  
> ----- Original Message -----
> *From:* Marvin Kaye <mailto:marv@lancaironline.net>
> *To:* Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
> *Sent:* Wednesday, April 13, 2005 3:00 PM
> *Subject:* [FlyRotary] Re: Fw: Gear-UP Landings - problem solved...?
>
> Hi Jack,
>
> I've used these rollers in the glass industry for longer than I care 
> to admit
> to.  The reason they work nicely in an industrial application is 
> because they
> don't have to spin real fast (generally) and the surface of the ball 
> stays
> relatively nice and shiny allowing the bearings that it seats in to do 
> their
> job.  I'm afraid that with a nylon ball after its initial contact with 
> any
> runway surface its exterior will be damaged so quickly that it won't 
> be able
> to "float" on its bearings, and it will soon turn into another "hockey 
> puck".