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Microcap & Penny Stocks : PLFM - Undervalued with great potential
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To: Netnut7 who wrote (2417)5/13/1998 11:13:00 AM
From: BIG EYE  Read Replies (2) of 9096
 
Thanks for your thoughtful response. Your friend is correct in his description of the coffin corner. Most wings are designed for operations in a particular airspeed/altitude range. Both the engine compressor blades and wing work best at that design altitude, and design airspeed. There is a cushion of airspeed between the wing stall speed on the low side and the critical Mach number (wing transonic) on the high side. That allows the aircraft to operate at an efficient indicated airspeed (between the two limits) which usually gives the pilot 1.2 g "cushion" on either side of this DESIGN OPTIMUM indicated airspeed.

As part of the normal growth of engine technology, the thrust capacity of the engines increases. This allows the aircraft to go well above the altitude originally anticipated buy the designers. THAT is when you have problems with the coffin corner. Your friend can explain the effect of TEMPRATURE on mach number, with mach tuck, etc., and the horror of getting BOTH high and low speed buffet (warnings) AT THE SAME TIME!!!

If you get caught in an updraft when operating in or near the coffin corner, you will never forget it. That is one of the problem here. The planned PLFM operation is purportedly in the Sao Paulo area. The Latitude of Sao Paulo(24S) is about the same as South Florida and we have all seen (on the W/X channel) the storms generated in that area. BUT, Sao Paulo is East (downwind) of a huge rain forest area of South America. There and in the Congo Basin, you find the "MOTHER of THUNDERSTORMS." The top's of these beauties are over 75,000 feet and they come in lines that are HUNDRED'S of miles long. You simply cannot operate IN or NEAR them. What the vertical gusts don't destroy, the hail will.

And then there is getting caught in, and being forced to ride in one of the updrafts UP ABOVE the coffin corner, with the loss of aircraft control. Sorry. Think I've said enough for now.
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