Larry Dighera wrote:

On Fri, 07 Nov 2003 08:41:12 -0500, Steve Robertson
wrote in Message-Id: :

Full throttle with carb
heat on will still get you enough power to go around

Full throttle with carburetor head applied is also likely to cause
detonation due to an excessively lean mixture. This preignition
applies all the instantaneous force of the _exploding_ (as opposed to
burning) gasoline/air mixture directly against the top of an ascending
(not descending as normal) piston. Detonation can bend piston rods or
crack the case. Over a longer period of time, detonation can burn
through the top of aluminum pistons.

Induced engine damage:
http://www.lycoming.textron.com/main...ips/index.html

Detonation and preignition:
http://www.lycoming.textron.com/main...ips/index.html

No argument from me, Larry. Long term use is not good. But I am talking about a go-around
situation where the pilot's choice is full throttle or crash. And the carb heat can be
turned off in a matter of seconds after going full throttle. I'm trying to convince a guy to
use carb heat on final as directed by the POH. You are not helping! (By the way, applying
carb heat enrichens the mixture in most flight regimes because the hot air is less dense
than cold air. The laws of physics are seldom broken by us mortals.) Also, your references
are for Lycoming engines, which are, in general, much less suseptible to carb ice than small
Continentals due to the design of the intake system.

Best regards,

Steve Robertson
N4732J 1967 Beechcraft A23-24