REFLECTOR: Brake authority

[Alex Balic]

Hiroo-

Do you have the 1.25 dia piston  Matcos' or the bigger 1.5" dia?  The larger
ones will give you about 17% more clamping force on the rotor. The upgrade
is $200 from Matco vs $1100 to change to Clevelands. The Clevelands might
still be better by a bit, but the larger Matco's would be a good try first.

 

  _____  

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Hiroo Umeno
Sent: Monday, June 04, 2007 12:18 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Brake authority

 

Scott,

 

Thank you for the insight.  I am starting to think that my brakes might be
"sub-standard" in that perhaps there is a trapped bubble somewhere.  I will
bleed it again and see if that makes a difference.  I will check for glazing
as well while the pants are off.

 

My transition training was done by Steve Murphree, I believe he is a factory
authorized and we did go through the airspeeds quite a bit.

 

Hiroo

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Baker
Sent: Monday, June 04, 2007 10:10 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Brake authority

 

Hiroo -

The Matco W600XT brakes are very effective for SUV, SE, LW/173 model
Velocity aircraft.

I don't recall if you have been to the factory flight transition training
program - to learn the importance of airspeed control on during landing.

We recommend an approach speed of 1.3 x Vs ...which translates somewhere
around 85-knots for fully loaded aircraft and around 80-knots when lightly
loaded.

On a 3000' runway plan on touching down within the first 500' to avoid the
need for heavy braking.

Fixed gear aircraft with wheel pants should also consider venting the pants
to allow ram-air cooling of the brake discs.

Also check the engine idle speed - and confirm you are able to pull the
engine power to full-idle during landing.  If the engine idle is high (by
100 rpm or more), this will add a lot to the landing distance.  Failing to
completely close the throttle during landing also places extra demands on
braking.

Make sure the brake were 'broke-in' correctly and that the discs are not
glazed.