On Fri, 20 Sep 2013 17:28:49 -0500, "RogerN"
wrote:

"Tim Wescott" wrote in message
m...

snip

I'm thinking that one could machine ends out of aluminum, then plug them
into a thin-wall (.035"), 1/2" or 5/8" diameter tube made of 2024. I'm
also thinking that bonding everything with epoxy would be a valid way to
go -- but I'm not so sure about the epoxy in a part that's going to be
subject to lots of vibration in at least eight of the six available
degrees of freedom.

Threading such thin wall tubing makes me think that it'll just break.

Welding makes me think it'll never happen.

Soldering???

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

I used to have a Testors BD-5, can't remember if it had a shaft extension or
not.

Some of my R/C helicopters have a shaft drive to the tail rotor and use
arrow shaft. Some use aluminum, some carbon fiber arrow shafts. These
aluminum one have inserts, can't remember for sure if they are glued in or
shaft internal, collar external clamping to the shaft. I would consider a
carbon fiber arrow shaft with aluminum fittings epoxied on, perhaps JB weld
or other strong epoxy. You may want to look at some R/C heli parts, lists
and exploded views are available online.

RogerN

Ive built many thousands of aluminum arrows with the inserts. JB Weld
does a fine job, as do several of the model makers CA glues. I wouldnt
use the Super Glue down at the Home Despot.

Most guys use Duco cement and it lasts a very long time under loading
and impact.


Gunner


"The socialist movement takes great pains to circulate frequently new labels for its ideally constructed state.
Each worn-out label is replaced by another which raises hopes of an ultimate solution of the insoluble basic
problem of Socialism, until it becomes obvious that nothing has been changed but the name.
The most recent slogan is "State Capitalism."[Fascism] It is not commonly realized that this covers nothing more
than what used to be called Planned Economy and State Socialism, and that State Capitalism, Planned Economy,
and State Socialism diverge only in non-essentials from the "classic" ideal of egalitarian Socialism. - Ludwig von Mises (1922)