15 year TBO

by Rich Provenzano in General Tech Discussion 5 years ago

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Re: 15 year TBO

by Roger Lee » 5 years ago

Roger Lee

125 5.12k 4.53k

According to the FAA they talked to the insurance companies and they said they would go along with what the FAA says. I ask Aviation Insurance resources and they told me the same thing.
The guys I know running on condition all cruise between 5k - 5.5K rpm. From what I have witnessed over the last 20 years I think the average owner flies between 5k - 5.3K for cruise. Now that's here in the US and with a ground adjustable prop. I have no idea with the constant speed folks or overseas.
Guys with Powered Parachutes or Trikes may be lower from what they have told me, but I don't personally know anyone of those guys that are even close to TBO.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

Thank you said by: Eugene Klimenko

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Re: 15 year TBO

by Bill Hertzel » 5 years ago

Bill Hertzel

13 1.95k 7.96k

The bottom line is what the regs and your insurance policy states.
If your policy does not specifically state that it is void if you operate beyond TBO, then you are covered.
They don't make it up as they go despite what many people think.
The regs say you can run an engine in an experimental airframe until it falls off the mounts.
It may be a really dumb thing to do but it is Not illegal.
Insurance companies pay for people doing really dumb things every day as long as it is not an intentional act. (i.e. Arson)
- - - - -
The RPM at which you run the engine is not as significant as the Manifold pressure.
The engine will be very happy at 5500rpm and 25" MAP all day long.
An engine running at 5000rpm and 27" MAP will see a short life.

This is not an automotive engine.
It was designed to run at full power continuously for 2000+ hours straight.

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

Thank you said by: Eugene Klimenko

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Re: 15 year TBO

by Eugene Klimenko » 5 years ago

Eugene Klimenko

12 74 1

On ELSA with fixed prop in this country we don't worry about manifold pressure, as long as WOT at 5600 - 5800 RPM.

I learned that from Roger Lee.

_________________________________________________________________________________________________________________________

I did talked to some guys from another side. Looks like they have little bit different mindset over there. Many of them using fixed propellers as well, but typical operating window is 4300 - 4800 RPM.

This is combination of different things. Price for fuel 2 - 6 times higher . Small countries = really no place to go. They flying for fun only and "at 4300 RPM you can hang up there for 5 hours on one tank!!!"

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15 year TBO

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