On Thu, 07 Sep 2017 02:13:03 -0700, Jeff Liebermann
wrote:

On Thu, 07 Sep 2017 15:36:30 +0700, John B.
wrote:

I would think that temperature would have a rather large effect on
this sort of thing but I suspect that an automatic air pressure system
wouldn't be difficult to arrange.

Yep, a big effect. Mine currently doesn't have any pressure
regulation, but does have an overpressure relief valve. The problem
is that I want to run as much pressure as the antenna tower will
handle. The maximum load is the area of the vertical tower section
(something like a vertical cylinder), times the inflation pressure.
The area is limited by practically and a desire to keep the weight and
size reasonable. That leaves air pressure as the important parameter.


Well, in a sense a constant running compressor and some sort of
pressure relief valve is a pressure control system. Isn't it :-?

If I ever decide to build an inflatable bicycle frame, the experience
with the antenna tower should be useful.
https://www.alibaba.com/product-detail/Yellow-giant-inflatable-bicycle-inflatable-bike_60246071497.html

Given all the pros and cons to BB flex and stiff versus flexible
frames, etc., I suggest that the "frame pressure" is probably going to
be greater then you can get with your hand pump. If I remember your
pressure gauge only up went to 100 psi, or there about :-)
--
Cheers,

John B.