The DG web site expresses serious reservations. They state that the TAS will have to be 450Kts ! Flutter ? Also that the characteristics of carbon fibre are completely untried at those temperatures
Bob Ward ----- Original Message ----- From: "Mike Borgelt" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, August 08, 2002 6:29 PM Subject: Re: [aus-soaring] The Perlan Project > At 11:41 AM 8/08/02 +1000, you wrote: > >I wonder what their weight and balance is like with those suits. No room > >for parachutes, I would think. > > > >Looks like masochism to me. > > > >PeterS > > Peter, > > Note that Carl Herold is a very experienced wave pilot. From my email > corresponce and phone calls with him and other members of the Perlan team > this is a *very* well organised endeavour. I went to Carl's wave lecture at > Reno just before going to the PASCO wave camp at Minden in 1983. He is very > safety concious. I then set my personal altitude limit at 25000 feet with > the simple constant flow oxygen system and stuck to it. I reached 24700 > feet on a day going to 31000. > > Going to high altitude with proper organisation, equipment and planning > isn't necessarily dangerous and I don't think this quest is any stranger > than many others such as sailing round the world solo which always seems to > draw admiration even though it has been done many times before. At least > this is a first they are trying. > Note the "EXPERIMENTAL" registration of the glider but note the original > manufacturer's limits are not being exceeded. The altitude limit with this > glider is probably a combination of flutter and Mach number at about 60 > knots indicated airspeed. Try a TAS/IAS ratio of something like 3.5 > > > Mike > Borgelt Instruments - manufacturers of quality soaring instruments > ABN 75532924542 > Box 7474 Toowoomba M.C. > Queensland 4352 > Australia > > Tel 0746 355 784 > mob 0428 355 784 > 0429 355 784 > fax 0746 358 796 > > International > phone: int'l+ 61 7 46 355 784 > Cellphone:int'l +61 4 28 355 784 > int'l +61 4 29 355 784 > fax : int'l+ 61 7 46 358 796 > > email: [EMAIL PROTECTED] > website:www.borgeltinstruments.com > > > -- > * You are subscribed to the aus-soaring mailing list. > * To Unsubscribe: send email to [EMAIL PROTECTED] > * with "unsubscribe aus-soaring" in the body of the message > * or with "help" in the body of the message for more information. > -- * You are subscribed to the aus-soaring mailing list. * To Unsubscribe: send email to [EMAIL PROTECTED] * with "unsubscribe aus-soaring" in the body of the message * or with "help" in the body of the message for more information.
