[Amps] Shipment of large old tubes

[Patrick Barthelow]

I googled  Aircraft Gyro   Shipping, and got a lot of relevant information, including Service Ships for Aircraft  Gyros, perhaps one of the most fragile instruments commonly shipped, in the airline Avionics business.   Some of them had guidelines for shipping and handling of gyros.  Perhaps a call to a big Gyro Manufacturer shipping department could name a shipping company that successfully moves such packages..     Maybe a Sticker:   AIRCRAFT GYRO  prominent on the tube package would generate more repectful handling...

The huge drops that we hear about, should, I think be absolutely not be tolerated by a CEO of a shipping company.  Maybe a write in campaign to the CEO office could get some changes.   If someone had a Data collector that continuously monitored G forces inside a package, and shipped on a suspected abusive shipping company, they could precisely identify where the shipping abuse was occurring. Even better, install inside,  a micro camera with an outside the box view on all three axes, and record the trip.  Use the G force meter to trigger a camera on, with a dwell time to video related activity once tripped...

Run these instrumented packages regularly to keep shipping companies honest.  Maybe live shipping box webcams, on a site, assigned to the various big shippers.

It would be interesting to have a data collector with two sensors; one just inside the box, and one in the deeper packed cushioning. to see the environment and G force Gradients in the box.    Someone must already done this and published in open literature study results..

 73,      Pat Barthelow;   AA6EG


> Date: Tue, 20 Dec 2011 09:50:38 -0800
> From: pete at petelancashire.com
> To: amps at contesting.com
> Subject: Re: [Amps] Shipment of large old tubes
> 
> You contents have to survive being dropped between 4 to 6 feet in
> afree fall. Impact can be any corner or side. For a shipment
> acrosscountry there will be at least one but I'd say two transfer
> pointsDoing the math
> 1 - local pickup2 - drop off at transfer center3 & 4 - pick up and
> move within transfer center5 - load into freight truck6 - unload into
> 2nd tranfer center7&8 - see 3/49 - see 510 - uload at your regional
> center11 - see 3/412 - load into local delivery13 - unload at your
> door/dock
> so take your box with your tube in it, and drop it 4 feet, 13 times.
> Ttoss it5-10 feet a couple times, then drop on top of it a couple
> boxes weighing70 lbs.
> On Fri, Dec 16, 2011 at 10:20 AM, Colin Lamb <k7fm at teleport.com> wrote:
> > A friend of mine called recently and told me he was cleaning out his basement and sending me some of his old tubes.  One was a 250TH.  I got it last night.  It was packed very well, along with other tubes.  The box arrived with no damage.
> >
> > However, when I unpacked the 250TH, I noted that the metal stem above the plate had fatigued, causing the plate to be loose inside the still good glass.  I believe the damage was fatigue because the tube was laying on its side, rather than being shipped vertical.  I recall a few years ago, I shipped some old tennis ball Western Electric 205D tubes on their side.  The top internal structure is supported by a vertical glass rod.  They were shipped on their side and all had broken glass rods, even though the tube envelope was still good.
> >
> > I expect modern tubes do not suffer this fate, and there is always the problem that what is shipped vertical is not likely to remain vertical during shipment.
> >
> > So, this is just a word of caution.
> >
> > 73,  Colin  K7FM
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