[TowerTalk] Rohn HDBX48 failure

[Dave Jordan]

IF anyone would like to see jpg of base mounted rotor email me direct.

73,
dave
wa3gin

Roger K8RI on Tower wrote:

><snip>
>HDBX48 metal on one leg!  This caused the tower to actually fold over at
>the 6ft level, right where the new rotor plate was mounted!   Had I mounted
>right at ground level, there is a chance, I guess, that it just might have
>survived ;)
>
>One thing I forgot to add in a previous post about rotors mounted down in a 
>tower.  When mounted "in the tower",  but at the base there is no give to 
>take up the stress and that small area takes the entire brunt of the torque. 
>If the rotor has a mount on the concrete, or a seperate mount it removes the 
>stress from the tower.
>
>Roger Halstead (K8RI and ARRL 40 year Life Member)
>N833R - World's oldest Debonair CD-2
>www.rogerhalstead.com
>
>
>As I said, thankfully there was no damage other than the total loss of the
>tower and antennas.  The rotor survived, as did the mast, except for the
>top piece.  I had alot of damage photos but can't seem to find them right
>now but if I do, I will put them out on my web-site for viewing.
>
>Chuck KØTVD
>
>
>  
>
>>Chuck.  The devil is in the details.  Please share with us the details of
>>your loss. Was your HDBX48 sensibly guyed?  Share how you had guyed the
>>tower.  Did the guys break or pull out first?  Was the tower guyed at the 
>>top
>>and also lower?  What was the wind speed?  Was it a hurricane or tornado?
>>How long a mast did you use?  How far above the apex of the tower was the
>>KT34XA mounted?  Did the mast collapse first?  Was the HDBX48 mechanically
>>sound?...i.e all cross braces in place and secured.
>>
>>Doug/VA5DX
>>    
>>
>
>
>_______________________________________________
>
>See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless 
>Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any 
>questions and ask for Sherman, W2FLA.
>
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>_______________________________________________
>
>See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
>
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>  
>