writes: Paul has done a lot to perpetuate the idea that my cooling system is "marginal at best". I still can't figure out where he gets this from. You do not fly an aircraft for 12 years and 1600+ hours in Florida, fly it to the desert southwest over 10,000+ foot mountains and win air races with a "marginal" cooling system. Much has been made of the 'spray bar' cooling system I used when racing. I don't know the details about your cooling system, so can't say if it's marginal or not. A marginal cooling system is one that can be affected by outside factors. It's a relatively new concept we learned from the Japanese. If you find yourself throttling back on hot day, or watching your climb rate for fear of overheating, then you have marginal system. The irony is that you can fly for years with a marginal system and still live to tell about it. It's also ironic that you can manage a marginal system and get by. So it's real easy to discount the concept. But when you look at crashes, sure enough, you will find that suddenly the odds caught up to the pilot. Distracted by the marginal system, he didn't notice.... That forced landing last year was excellent example. Statistically, we want robust systems that handle uncontrollable outside factors. This provides a measurable drop in risk. This is a new concept. It has profound effect. But you can live your whole life and never appreciate the significance. My comment on spraybar was wrong. It can be an asset, particularly for initial testing. It's highly effective method and can bring extra safety margin. -al wick Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam timing. Artificial intelligence in cockpit, N9032U 240+ hours from Portland, Oregon Prop construct, Subaru install, Risk assessment, Glass panel design info: http://www.maddyhome.com/canardpages/pages/alwick/index.html ----__JNP_000_10e0.372c.7310 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable

On Thu, 4 Jan 2007 13:49:13 -0500 "Tracy Crook" <lors01@msn.com> writes:

Paul has = done a=20 lot to perpetuate the idea that my cooling system is "marginal at=20 best". I still can't figure out where he gets this from. = You do=20 not fly an aircraft for 12 years and 1600+ hours in Florida, fly it to = the=20 desert southwest over 10,000+ foot mountains and win air races = with a=20 "marginal" cooling system. Much has been made of the 'spray bar'= =20 cooling system I used when racing. =20

I don't know the details about your cooling system, so can't say if it= 's=20 marginal or not. A marginal cooling system is one that can be affected by=20 outside factors. It's a relatively new concept we learned from the Japanese= . If=20 you find yourself throttling back on hot day, or watching your climb rate = for=20 fear of overheating, then you have marginal system. The irony is that you = can=20 fly for years with a marginal system and still live to tell about it. It's = also=20 ironic that you can manage a marginal system and get by. So it's real easy = to=20 discount the concept.

But when you look at crashes, sure enough, you will find that suddenly= the=20 odds caught up to the pilot. Distracted by the marginal system, he didn't=20 notice.... That forced landing last year was excellent=20 example. Statistically, we want robust systems that handle = uncontrollable=20 outside factors. This provides a measurable drop in risk. This is a new = concept.=20 It has profound effect. But you can live your whole life and never = appreciate=20 the significance.

My comment on spraybar was wrong. It can be an asset, particularly for= =20 initial testing. It's highly effective method and can bring extra safety = margin.=20

-al wick
Cozy IV powered by Turbo Subaru 3.0R with variable = valve=20 lift and cam timing.
Artificial intelligence in cockpit, N9032U 240+ = hours=20 from Portland, Oregon
Prop construct, Subaru install, Risk assessment, = Glass=20 panel design info:
http:= //www.maddyhome.com/canardpages/pages/alwick/index.html

----__JNP_000_10e0.372c.7310--