REFLECTOR: Original Higher RPMS question

[Tom Martino]

I'll never forget the timed that a Lycoming IO-540 ... read 3000 RPMs
for literally 10 to 15 seconds.  Then the pilot quickly pulled back the
prop governor.  When he landed ... one of our passengers (a pilot as
well) ... insisted that the entire engine be torn down and inspected.
The pilot spent thousands of dollars for NOTHING.

 

________________________________

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Scott Derrick
Sent: Tuesday, November 21, 2006 3:35 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Original Higher RPMS question

 

Yeah... We've all read Lycomings and Continental's   CYA  documents
before.  

I didn't notice does this one have the requirement to tear down for
inspection any engine that ran the prop into a little bitty patch of
tall grass? 

We are talking about real world operation, not lawyer speak...

Scott

Jim Agnew wrote: 

Attached is the Lycoming document on engine over-speed for all models.

 

Jim
 

James F. Agnew
Jim_Agnew_2 at Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed & Flying 

 


Rene Dugas wrote: 

Thanks to all.  I have raced boats, motorcycles and cars for years but
always appreciate others experiences and view points.  I've blown up
engines in small applications at 16,000 rpms and had lawn mowers hopped
up and blow at 3000 rpms.  I wish to be conservative but by nature I am
a racer.  I will continue to research.  I do not intend to use the
higher setting except if desired for climb out and acceleration to
cruise at 23/23 or 24/24.  Cooling has never been a problem.  I have
NACA's about one inch larger than the factor is now recommending.  Oil
in cruise is 165 degrees and CHT at 380 with EGT's 1450.  Large piston
diameter makes for large mass effect that multiplies rapidly as RPM's
increase. 
Thanks,
Rene'
 
 



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