[TowerTalk] Will-Burt pneumatic mast repair

[Joe Subich, W4TV]

> And they'll tip over in a strong wind. 

This is one of the reasons the TV news vans don't use masts 
bigger than 52/56' on a Ford F-350 or Mercedes van chassis 
and generally include "stabilizing jacks" at the rear corners 
for the big masts.  The few news vans built on minivan and/or 
SUV chassis were generally limited to 25 to 30 foot masts. 

73, 

  ... Joe Subich, W4TV 
  



> -----Original Message-----
> From: towertalk-bounces at contesting.com 
> [mailto:towertalk-bounces at contesting.com] On Behalf Of jimlux
> Sent: Monday, April 19, 2010 6:55 PM
> To: Tower and HF antenna construction topics.
> Subject: Re: [TowerTalk] Will-Burt pneumatic mast repair
> 
> 
> edmund weber wrote:
> > Greetings to the List,
> >      These air driven masts are most often seen mounted in Ford one
> > ton vans
> > equipped with TV microwave link gear.These masts will go to 
> 40-50 feet  
> > un-
> > guyed  with a truck mounted compressor 
> 
> And they'll tip over in a strong wind.  I was doing the 
> calculations for 
> a mast next to a car, attached to the roof rack, and I was 
> surprised at 
> how non-wind-resistant these schemes are.
> 
> http://home.earthlink.net/~w6rmk/antenna/mastcar.htm
> 
> 
> 
> 
> 
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