Re: Aluminum Tailboom Forms

From: Jake Palmer <82.jake_at_gmail.com>
Date: Tue, 3 Jul 2012 10:33:44 -0700

I've also got an old tank antenna that I use for pennyplane booms. I think
I found it at a surplus store umpteen years ago.

On Tue, Jul 3, 2012 at 10:18 AM, Norm Furutani <tilka89_at_yahoo.com> wrote:

> **
>
>
> I also have a form like John's. I believe it was used as an antenna for a
> tank. There used to be a button welded on the small end so you couldn't
> stab yourself.
>
> I also turned a few outdoor tailboom forms using the following method -
> might work for indoor size. It was tedious but the end result was pretty
> good.
>
> Calculate the angle of the taper and set it in your cross feed.
> Chuck the boom stock with maybe a half inch or less sticking out.
> Cut the small end of the boom, maybe a 1/4" of the length.
> Gradually extend the stock out of the chuck (do not rotate in the chuck).
> You might need a steady rest as it gets longer, but nothing fancy, just
> something to keep it from whipping.
> The hard part is the transition of the previous cut to the next cut so
> there is no step.
>
> I thread the big end of my forms, screw in an eye and hang them so they
> don't distort.
>
> NormF
>
>
>
>
>
> - Norm
>
> --- On *Tue, 7/3/12, John Berryman <wordguy1950_at_yahoo.com>* wrote:
>
> ---snip---
>
> Many years ago, I bought a tapered STEEL tail-boom form, bright yellow in
> color with a threaded end and a hex fitting – clearly a ??? for some piece
> of machinery. Mine is about 15” long, ~5/16” at the fat end, ~.070 at the
> thin end, and straight as a string. Happy to post pics if there’s a
> scrounger out there who thinks he might recognize what the original purpose
> of the ??? was. It APPEARS to be a piece that, due to fragility, was
> designed to be replaced fairly frequently – perhaps cheaply?
>
>
>
>
>
Received on Tue Jul 03 2012 - 10:33:46 CEST