G103 Acro airbrake handle

The swage that activates the brake mechanism seemed too far
forward IMO to reach maximum braking pressure.

We are talking about exactly *what* constitutes the full open spoiler *stop*.
If the wheel break is set too far forward, then the spoiler open stop becomes
the *hard breaking* position of the spoiler handle. If the spoilers hit the
full open stops(located in each wing), before full wheel braking has occurred,
then you won't get all the wheel brake that is available in a properly adjusted
systen.
Solution; Set the wheel break to its maximum (full hard aft pull of spoiler
handle) so that the spoiler actuating arms (in each spoiler box) are about 10
mm from hitting their stops.
JJ Sinclair

On 18 Jan 2004 18:31:00 GMT, (JJ Sinclair) wrote:

The swage that activates the brake mechanism seemed too far
forward IMO to reach maximum braking pressure.

We are talking about exactly *what* constitutes the full open spoiler *stop*.
If the wheel break is set too far forward, then the spoiler open stop becomes
the *hard breaking* position of the spoiler handle. If the spoilers hit the
full open stops(located in each wing), before full wheel braking has occurred,
then you won't get all the wheel brake that is available in a properly adjusted
systen.
Solution; Set the wheel break to its maximum (full hard aft pull of spoiler
handle) so that the spoiler actuating arms (in each spoiler box) are about 10
mm from hitting their stops.

This will also avoid wing damage that might result from using the
in-wing brake stops. Our G103A experienced some cracking at the ends
of the upper surface brake slot before the linkage was adjusted so the
in-wing limits were not reached.

I flew the aircraft in question today - and made a fairly well-braked
stop. The fully deployed air-brake & wheel brake lever position is
about a 45 degree angle to the rear. Thinking back about the flight, I
tend to push down on the knob to get decent wheel braking.

HTH

--
martin@ : Martin Gregorie
gregorie : Harlow, UK
demon :
co : Zappa fan & glider pilot
uk :

In article ,
(James) wrote:

Many folks in our club complain of weak brakes in our G103. I did
some investigating and talking to other people familiar with the G103
and learned that the master cylinder is a BMW motorcycle part

Hmm.

Having owned a few BMW motorcycles, they had *crap* brakes up until the
K series starting in 1983. And they only got really *good* braking
systems once they starting building them for optional ABS in 1987 or so.

-- Bruce