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ACRO E-mail Archive Thread: [Acro] Typical TBO on Pitts S1 engine?

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ACRO E-mail Archive Thread: [Acro] Typical TBO on Pitts S1 engine?


Thread: [Acro] Typical TBO on Pitts S1 engine?

Message: [Acro] Typical TBO on Pitts S1 engine?

Follow-Up To: ACRO Email list (for List Members only)

From: Klusmanp at

Date: Fri, 22 Feb 2002 03:40:22 UTC


  Once again I find myself turning to those who have gone before me.

To all those Pitts (and engine) gurus out there:

How long does an O-360 last that regularly sees operation in the 3100 - 3200 
rpm range during acro?

I'm looking at a Pitts S-1S that has 700 SMOH. Compression checks were 77-78 
back in 1997. Gradual reduction over the years to 74-75 on last annual 
(recent). Current and previous owner use synthetic oil and change it every 
10-15 hours. The engine is parallel valve design.

If I use this airplane for sport flying how much more time could I expect out 
of the engine before it needs a major overhaul? Does anybody know of a Pitts 
S-1S with an engine still going strong at, say 1300 hrs?

Thanks in advance for all the folks who reply. This is such a FANTASTIC way 
to exchange information. I really appreciate the generosity of those who have 
responded to all my other questions!

Paul Klusman


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