=20 Apparently Cessna is still making up their mind about thermawing and is only supporting TKS for now. . . I thought this one was interesting as it indicates some of what I hope are only teething issues for thermawing. Colyn =20 Re: TKS decision guidance=20 ________________________________ I had mixed results with Evade in a round trip from Portland to Southern California last week.=20 __________________ Art Schwalge, Columbia 400, N4468F=20 =20 =20 ------_=_NextPart_002_01C86FE5.1DFB1FD0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

The = Columbia "Evade"=20 system and the "Thermawing/Therm-X" system are very different. = Compare=20 this situation to that in which you give a box of gears and springs to = two=20 individuals, an experienced watch maker and an inexperienced = kayaker. =20 The former could make a clock that keeps perfect time whilst the latter = has to=20 spend his energy trying to keep his head above water so the clock = becomes a very=20 secondary priority. It's not the parts that are critical so much = as the=20 assembly and implementation of the technology. =

Columbia = already had=20 stretched their management expertise to the limit and the hot wing = system was=20 afforded little engineering time or management support. Consider = that they=20 installed the first systems without insulation between the 7 kilowatt = alternator=20 and the copper mesh in the wing. They turned that puppy on and got = an=20 airborne toaster - talk about a hot wing!

Contrast = that to the=20 current implementation of Therm-X at RDD. They know the theory and = practice of the hot wing. They have wrung out the system under = different=20 installation conditions and on different wing designs. And there = are=20 already hundreds of hours on the systems. There might be = differences in=20 some components compared with the early Evade designs but the biggest = factor in=20 performance is the installation. I expect that as the dust settles = at=20 Columbia/Cessna they will complete their homework and start to ship = planes with=20 a hot wing. They might even offer to fix their early = installations, if=20 only to emphasize Cessna's commitment to the pilot community. =20

Robert M.=20 Simon

ES-P (de-iced) N301ES

From: Colyn=20 Case on earthlink [mailto:colyncase@earthlink.net]
Sent: Wednesday, February 13, = 2008 1:09=20 PM
Subject: = Columbia = owners on tks vs.=20 thermawing

Apparently Cessna is still = making up=20 their mind about thermawing and is only supporting TKS for now. . . I thought = this one was=20 interesting as it indicates some=20 of = what I hope=20 are only teething issues for thermawing. Colyn

Re: TKS decision=20 guidance =

I had mixed results with = Evade in a=20 round trip from Portland to Southern California last week. =

__________________
Art = Schwalge, Columbia = 400, N4468F=20

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