Mailing List lml@lancaironline.net Message #53053
From: Kevin Stallard <Kevin@arilabs.net>
Sender: <marv@lancaironline.net>
Subject: RE: [LML] Re: Beringer wheels and brakes on a 235?
Date: Fri, 02 Oct 2009 22:34:27 -0400
To: <lml@lancaironline.net>

They are very, VERY nice. 

 

Forgive me for looking at this from engineering point of view…

 

When I looked at them, I compared them to Grove’s wheels in brakes in terms of stopping capability (claimed).  Data sheets are dubious to me when a company is trying to sell something, but this is what I read:  Grove shows around 4700 in-lbs, while Berigner is 4200 in-lbs.  Grove says they are capable of dissipating 246,000 ft-lbs of kinetic energy while Beringer shows 198,000 ft-lbs (5 inch wheels and brakes Grove PN:  57-224, Berigner’s part number: JA-31, Legacy installation).  198k ft-lbs is still respectable, but I wanted the extra margin.

 

Who knows what the real numbers are, but Grove appeared to be better in terms of stopping power.  Is this true?  I don’t really know, because I don’t have a dyno to hook them up to. 

 

I could be reading this wrong, but it also appears Grove is lighter as well.  The data sheet isn’t clear whether or not the 7.2 lbs is for both wheels or just one.  I think it means 7.2 lbs for both compared to Beringer’s 4.25lbs for one?  It’s not too clear if that is the case.

 

Anyway, bottom line, you have a mission for your plane, what ever you choose, know your limits.  My personal (and uneducated) opinion is that either Grove or Beringer’s brakes would probably be just fine.  Ether brakes you pick, you need to know their limits in respect to your airplane’s configuration (i.e. weight and touch down speed). 

 

Be careful out there…

 

Kevin

 


From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Craig Gainza
Sent: September 28, 2009 19:18
To: lml@lancaironline.net
Subject: [LML] Re: Beringer wheels and brakes on a 235?

 

Steve,

Pete had one of the wheels at Reno.  Beautiful design and 15 lbs less weight.  It is designed for a tubeless Michelin tire.

Not available for the IV's yet but Beringer said they hope to have them available by 2010.

Craig





To: lml@lancaironline.net
Date: Sun, 27 Sep 2009 20:40:55 -0400
From: mcmess1919@yahoo.com
Subject: [LML] Beringer wheels and brakes on a 235?

Here are some photos of Pete Z’s Legacy installation.  If they work as good as they look………….

 

Steve Colwell

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