[TowerTalk] Mast vs. 45G

[Jerry Muller]

If you mean a 20 foot long heavy mast, I've done a 21 foot long SCH 80 2 
1/2" pipe that weighs 165 lbs. We put it in and then took it out. I thought 
the gin pole was going to bend but it worked. My gin pole is a WB0W with a 
24 foot 1/4" wall tube. I replaced it with a 24 foot long 3" mast made of 
6061-T6 aluminum, 3/8 wall weighing in at 96 lbs. The new mast was easier to 
get in than getting the old one out.

I've seen XX towers put the same mast into R-45 using a gin pole made of R25 
(with a climber on top of the gin pole!). They apparently do it all the 
time.

Both towers have two thrust bearings (TB-4). One at the top and a second 
about 5 feet down in the tower. The rotor can be pulled by just picking the 
mast up and locking it in place.

I hope I got the right meaning of "20 heavy". Most of the time, "something 
heavy" means a large aircraft to me (eg. Delta 435 Heavy), I'm also a flight 
instructor.

73, Jerry - K0TV


-----Original Message----- 
From: K7LXC at aol.com
Sent: Friday, April 19, 2013 10:00 AM
To: towertalk at contesting.com
Cc: wa7eqw at yahoo.com ; wa7eqw at gmail.com
Subject: [TowerTalk] Mast vs. 45G

Howdy, TowerTalkians --

    I've never tried this so I thought I'd ask. Can you  drop a 20 heavy
mast down and thru the tower? I don't think there's enough room  but I could
be wrong. Tnx.

Cheers,
Steve       K7LXC
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