The 17B2 is pretty long and it takes a lot of torque to get it turning, and
then to stop it from turning. This puts a lot of stress on the rotor and
support structure, so I'd think very secure guying in at least three
directions, at three elevations on the telescoping mast, e.g., 10', 20', 30'
(or wherever the top is) would be an absolute necessity. Collapsing the
mast from 30' to 25' or maybe shorter is a good idea. The center (highest)
mast on this unit has a small diameter and HD rotors may not be able to
clamp down on it, so you may need shims or something. -WB2WIK/6
"Success is the ability to go from failure to failure with no loss of
enthusiasm." -Winston Churchill
> -----Original Message-----
> From: Carrington, Walter [SMTP:Walter.Carrington@umassmed.edu]
> Sent: Thursday, November 20, 2003 7:35 AM
> To: towertalk@contesting.com
> Subject: [BULK] - [TowerTalk] Temporary mast/tower --Rohn pushup
> mast?
>
> Will a 30' Rohn pushup mast handle a 2 meter beam and small rotator?
> Beam is a CC17B2, 31 feet long, 15 lb., 3.9 square feet wind area. What
> if I reduce it's height: 25' ?? The location is very windy. My current
> tower is a 10' mast duct taped to the deck, so almost anything will be an
> improvement.
> What should I use for stakes for guying? The ground is rocky and
> will probably be frozen solid soon in a week or two.
> The other option I've considered is a temporary 25G with a pound in
> base, but I doubt that I can get it done before the ground is too frozen
> to do much.
> Any other suggestions for putting up the beam till spring would be
> appreciated.
> By next spring I hope to have my permit for a properly erected Rohn
> 25G or similar tower. \
> Thanks, Walter, K1CMF
> _______________________________________________
>
> 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.
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
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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