Suction cup mounts

[Ed Winchester[_2_]]

As I mentioned in a different thread, I use a PNA with XCSoar in the
cockpit. I have been mounting this with one of Paul Remde's big suction
cup mounts, and it has worked fine, only rarely coming loose in flight
(as long as I lick around the edge when applying it). But that's been
in thermal flights probably no higher than 7k ft. If I go higher
(oxygen altitudes) will it not work? Seems that is should be a problem
because it works off atmospheric pressure, and up there, there's only
half as much. Anybody have experience with this?

Ed

[John Scott[_2_]]

I've used the same suctino cup mount as high as 18,000'. However, I did
start at about 7,000'. I recall pressing on it occasionally just to make
sure it was snug. It was attached to a 1-26 canopy, just above the frame
rail, to give you an idea of the curvature.

John

[Mike Bamberg]

On Sep 17, 1:58*pm, "John Scott" > wrote:
> I've used the same suctino cup mount as high as 18,000'. *However, I did
> start at about 7,000'. *I recall pressing on it occasionally just to make
> sure it was snug. *It was attached to a 1-26 canopy, just above the frame
> rail, to give you an idea of the curvature.
>
> John

The only difficulty I've had with the suction cups on the canopy is if
they get cold, the vinyl gets stiff and sometimes loses the seal.

I don't usually have that problem if I use another smooth surface in
the cockpit, just the canopy.

I've not tried any "real" system like Ram or other heavy-duty
comercial products, just the mounts that come with the PNA or
something from the local car parts store.

YMMV.

Mike