Hi Alan,
I saw one of these towers at Dayton this past spring. The one on display
had a base width of around 36 to 40 inches. The tower was inside the
building and laying on its side. I tried to examine it to see how the tower
was raised and lowered and it looked like there was a large counter weight
that rode up and down the side of the bottom section on tracks. This
counter weight, I assume would offset the weight of the remaining tower and
antenna lode. This tower was definitely very heavy duty. The legs of the
bottom section were about the diameter of my arm at the elbow. Amazing!!
The display model was sold. I do not know the specifications of this
display model.
Howard #3
----- Original Message -----
From: "Alan R. Downing" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, December 16, 2013 12:46 AM
Subject: Re: Luso towers
> The width of the bottom section is 65 inches, less than I would have
> guessed. Width of the top section is 18 inches. I don't know what the
> foot
> print of the rotating base is, but that may well be significantly larger
> than the first section of the tower itself.
>
> Here is an interesting fact, when buying any of these towers, you must pay
> for a Luso construction engineer to travel to your station from Japan, to
> supervise the entire preparation and installation activities.. You must
> pay
> all of his expenses, including airline tickets, hotel room, etc. The
> reason
> for this is to assure that the tower is installed correctly. My friend
> that
> just bought the 90 foot model, had to pay around $5 grand for the
> engineers
> presence.
>
>
> Alan
>
>
>
>
> Alan R. Downing
> Phoenix, AZ
>
>
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Colin McDonald
> Sent: Sunday, December 15, 2013 10:36 PM
> To: [log in to unmask]
> Subject: Re: Luso towers
>
> heavy duty alright at around 15 tonnes...that sounds a bit on the heavy
> side? A heavy duty 68 foot del hi only weighs maybe 500 pounds
> total...this
>
> must be a very very large tower? that is, very large spread at the bottom
> to
>
> support so much weight at the top?
> Obviously a 68 foot del hi is only rated for about 12 square feet of wind
> load though lol.
> I can't imagine shipping on a beast like that haha.
> 73
> Colin, V A6BKX
> --------------------------------------------------
> From: "Alan R. Downing" <[log in to unmask]>
> Sent: Sunday, December 15, 2013 8:14 PM
> To: <[log in to unmask]>
> Subject: Luso towers
>
>> Hello list,
>>
>>
>>
>> Has anyone on the list looked into Luso towers when shopping for a new
>> one?
>> For those that aren't aware of Luso, it is a Japanese tower builder of
>> heavy
>> duty electrically operated crankup towers in heights from 90 feet to over
>> 300 feet. They accommodate antenna, rotor, and mast weight of up to 2200
>> pounds. The 150 foot model is rated to accommodate 140 square foot of
>> antenna, and goes from a fully retracted height of 42 feet to a fully
>> extended height of 145 feet in 29 seconds. Masts of up to 8.6 inch
>> diameters are accommodated with multiple thrust bearings. Each model is
>> available with a number of options, including a rotating base, and
>> automatic
>> retraction when winds exceed a preset level. The 150 foot model weighs
>> 29700 pounds excluding options.
>>
>>
>>
>> A friend just took delivery of the 90 foot model with the rotating base
>> and
>> automatic retraction system. Because of my recent good news on the
>> health
>> front, I am seriously thinking of ordering the 120 foot tower with the
>> rotating base, automatic retraction, 4 inch mast with thrust bearings,
>> and
>
>> a
>> prop pitch rotor with Green Heron controller.
>>
>>
>>
>> If anyone has investigated the Luso offerings, I'd appreciate discussing
>> them with you.
>>
>>
>>
>> Merry Christmas everyone, and a very happy New Year.
>>
>>
>>
>> Best 73
>>
>> Alan
>>
>>
>>
>>
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