According to DHL they only use pressurised holds.
> -----Original Message----- > From: Ing. Gert Gremmen [SMTP:[email protected]] > Sent: Thursday, June 04, 1998 6:42 PM > To: James, Chris; [email protected]; [email protected] > Subject: RE: Altitude > > I am not in the business of producing electronics, but if these were > all > true, it means that defective electronics upon transportation by air > should > happen all the time. They don't. > > I doubt seriously if DHL, UPS and whatever transporter specifies cargo > conditions > for every box they send on your or my behalf. And lot, yes lots of > electronics get transported to this side of the ocean from the USA > and > between USA states using standard air transport methods. > Standard might be semi pressurized but ... what's the difference in > semi > pressured cargo and full vacuum ( just another 20% of sucking force) > anyhow > ? And who is to be charged if pressure was lost in some cargo ? > > Let's draw a realistic conclusion that in general electronics do not > suffer > from air transports, unless...... > > Are there any people around in this group from component > manufacturers that > could shine their light on this and fill in the dots ? Do low cost > detectors exist for detecting pressure loss, such as temperature > colorizing > strips and upside down detectors ? > > Regards, > > Gert Gremmen > > > > > == Ce-test, Qualified testing == > Consultants in EMC, Electrical safety and Telecommunication > Compliance tests for European standards and ce-marking > Member of NEC/IEC voting committee for EMC. > Our Web presence: http://www.cetest.nl > List of current harmonized standards http://www.cetest.nl/emc-harm.htm > 15 great tips for the EMC-designer http://www.cetest.nl/features01.htm > > Support the International Red Cross Million 2000 Lottery: > http://www.pluslotto.com/default.asp?urlref=3300008136443 > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of James, Chris > Sent: donderdag 4 juni 1998 8:45 > To: '[email protected]'; [email protected] > Subject: RE: Altitude > > Can't answer for all components but of interest we had problems > shipping > some types of MO discs (discs not drives) in even semi pressurised > hold > conditions, where they would crack due to internal pressures within > the > disc structure. > > Is it heated? If not it will be -50C or less also. > > It would seem logical that electrolytics would blow especially if > subjected to a rapid pressure decrease. > > I've known people fly their push bikes from the UK to Europe without > first reducing the pressure in the tyres only to find the tyres blown > on > arrival, again in semi-pressurised conditions. > > Note that pressurised cabins are only pressurised to around equivalent > of 5k to 8k feet. > > Chris > > > -----Original Message----- > > From: [email protected] [SMTP:[email protected]] > > Sent: Wednesday, June 03, 1998 3:23 PM > > To: [email protected] > > Subject: Altitude > > > > This is not a safety or EMI question, but because this group has > such > > broad backgrounds and diversity I am hoping that someone can > comment. > > > > I have been asked by one of our customers to ensure that our > equipment > > is capable of being shipped in an un-pressurized aircraft for > > altitudes > > of 30K to 40 K feet. This is a non operational requirement, but are > > there other concerns I should be aware of? I recall hearing that > some > > commercial grade electrolytic could explode at high altitudes. > > > > Any comments or suggestions greatly appreciated. > > > > Rick Busche > > Evans & Sutherland > > Salt Lake City, Utah > > [email protected]
