Lycoming intake preheater

Anyone know the reasoning for running the intake tubes through the hot oil
in the sump?

Dale Larsen wrote:
: Anyone know the reasoning for running the intake tubes through the hot oil
: in the sump?

1. Make oil not so hot
2. Make package more compact
3. Reduce power
4. Decrease detonation margin.

1&2: good
3&4: notsogood

--
************************************************** ***********************
* The prime directive of Linux: *
* - learn what you don't know, *
* - teach what you do. *
* (Just my 20 USm$) *
************************************************** ***********************

wrote:

Dale Larsen wrote:
: Anyone know the reasoning for running the intake tubes through the hot oil
: in the sump?

1. Make oil not so hot
2. Make package more compact
3. Reduce power
4. Decrease detonation margin.

1&2: good
3&4: notsogood

--


And help reduce suceptability to carb icing.

Some engine design need to heat the intake side to prevent condense in the
tubes that lead to engines that run rough, this is a normal design on carb
engines, even in cars. it also prevent ice in the tubes but that is not the
main goal, even cars use warm air to heat the intake air in the carburator
and tube, manually changed (winter/summer) or by a thermostat

Jan Carlsson
www.jcpropellerdesign.com

"Dale Larsen" skrev i meddelandet
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Anyone know the reasoning for running the intake tubes through the hot oil
in the sump?