From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Kevin Stallard
Sent: Friday, October 02, 2009
8:34 PM
To: lml@lancaironline.net
Subject: [LML] Re: Beringer wheels
and brakes on a 235?
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?
Here
are some photos of Pete Z’s Legacy installation. If they work as
good as they look………….
Steve
Colwell
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