Hydraulic trailer surge brakes means no parking brake?

On Mar 17, 6:31*pm, Darryl Ramm wrote:

Since when do you leave hydralic brakes locked on aircraft? Chock
(chalks if you prefer :-)), tie down, unlock brakes. Right?

Darryl

What's you point? You don't need to leave them locked on a trailer
either do you?

But yes, I leave my PA28 parked with the brakes on if there are no
chocks or tie downs available.

Andy

On Mar 17, 7:39 pm, Andy wrote:
On Mar 17, 6:31 pm, Darryl Ramm wrote:



Since when do you leave hydralic brakes locked on aircraft? Chock
(chalks if you prefer :-)), tie down, unlock brakes. Right?

Darryl

What's you point? You don't need to leave them locked on a trailer
either do you?

But yes, I leave my PA28 parked with the brakes on if there are no
chocks or tie downs available.

Andy

Dumb old mechanical brakes on a trailer may not suffer the same
problems as hydraulic brakes do. Hydraulic brakes on aircraft can
suffer hydralic pressure leak down while parked, setting brakes when
hot and then not being able to release them etc. Varios POH provide
various different warnings/procedures for parking with hydraulic
brakes. Wether it is a good idea or not almost all trailers at
gliderports I fly out of have the parking brakes left on regardless of
weather the wheels are chocked. I know owners in the UK (ie. lots of
corrosion inducing moisture over winter) who have had problems with
brakes seizing on their trailers so maybe its best we don'g all do
this, but we do. I'm suggesting we all may have more problems with
hydraulic actuated brakes left locked on. I'd hope hydraulic brakes
provide other benefits, including less adjustment being required.

For people who don't think you really need a manual brake on the
trailer I hope their gliders are a lot lighter than mine (most are)
and they never go anywhere with a sloped surface where they need to
manhandle the trailer. Just manually swinging my ASH-26E trailer on
the level looking cul-de-sac I live on is a handful just given the
high camber on the street.

Darryl