SonexBuilders.net

Working on a modified center console for the brakes and flaps and trying to determine the actual throw needed by the brake handle. I'm using the master cylinder from Sonex, and their brake puck system.
Looking at SNX-L07 view ff, it looks like only about 14 to 15 degrees of throw is needed. However, the cylinder arm can swing about 45 degrees through a full throw.
With my design, I can easily get about 26 degrees of throw on the cylinder actuator arm before I hit my stop. I think this is enough, but I'm not sure. Just to be clear, I am measuring angles around the center fixed pin of the master cylinder.

Can someone who has run in the system let me know if this will work? How far does your handle move? (I can calculate the angle if you tell me the pull distance and the distance from the master cylinder pin to where you measured the pull distance.
Also did your parking brake stop move once the brakes wore in?

Thanks!

Gregg Short
Sonex 715
Burbank, OH
330.465.7531 gregg@gshort.com

Wing pins drilled, pissing around with center controls before I close in the spar channel.

Greg,

At a brake lever length of 15", the handle moves about 2 3/4". So that's roughly 10 degrees of rotation of the lever. To adjust the brakes and keep the lever travel about the same as the pucks wear, I remove one or more of the thin washers between the inside bearings and the brake housing. When, ultimately, all of the thin washers have been removed, it will be necessary to either accept greater brake lever travel or install new pucks.

Hope this helps,

Art,,,,,,,,,,,,,,,,,,,,,,Sonex taildragger #95,,,,,,,,,,,,,,,,,,,,,Jab3300 #261

Art,

Very helpful! Sounds like I don't have an issue.
Approximately how many hours/landings do you have on your hydraulic brakes? Mostly turf or hard surface?

Gregg,

Just checked the log........I've put about 160 hours on the Aeroconversion's hydraulic brakes and that includes 429 landings, all on a paved runway. That's a lot of landings per hour of logged time!

Art